Philip Silva

About Philip Silva

TreeKit, Cornell University
Ithaca, NY USA

Philip Silva is a Ph.D. student in Natural Resources at Cornell University. His work focuses on informal adult learning and participatory action research in social-ecological systems. For the past four years, Silva taught courses in urban forestry, environmental history, and design at The New School. In 2011, Silva was one of 25 national leaders convened by the US Forest Service to participate in the “Vibrant Cities and Urban Forests” task force. He has worked with some of NYC’s leading environmental organizations, including Sustainable South Bronx, Brooklyn Botanic Garden, Just Food, and the Southern Bronx River Watershed Alliance. Philip is a recipient of the 2010 iLAB Residency of the Interdisciplinary Laboratory for Art, Nature, and Dance (“iLAND”) and a 2009 Fellow of the Environmental Leadership Program. He currently serves as co-founder and co-director of TreeKIT, an initiative to measure, map, and collaboratively manage urban forests. A native of Newark, NJ with a graduate degree in urban policy analysis, Silva is dedicated to exploring nature in all of its urban expressions.

How can different ways of knowing—and of producing knowledge—be useful for understanding and managing urban ecosystems?

Doreen Adengo

About the Writer:
Doreen Adengo

Doreen Adengo is the principal of Adengo Architects, an architecture and urbanism practice grounded in research and multidisciplinary collaboration.

Doreen Adengo

For most of my career as an Architect, I’ve taught part-time while I worked in an office. And as a result, I am interested in the interaction between theory and practice. This past summer I taught a Housing Studio at Makerere University’s College of Engineering, Design, Art and Technology, located in Kampala, Uganda. The course was part of the university’s practical training program, in which we had a real client, a developer interested in building affordable homes on a 66-acre piece land about 25Km outside of Kampala. The team was multidisciplinary, involving five architecture students from the local university and two international affairs students from The New School, New York, which allowed for a rich and extremely creative design process. On our first visit to the site we found that 11-acres of the land was a wetland—meaning there was a seasonal stream in middle of the land, with two hills on either side. Our main challenge became exploring ways to incorporate the wetlands into the master plan as an essential part of the urban ecology. Inherently, the most challenging task at hand was to convince the developer not to destroy the wetland by filling it with sand and building on it, which is a common practice in Kampala, but rather to see it as an amenity and something that would add value the housing development.

HISTORICAL CONTEXT: Kampala was built on seven hills, adjacent to Lake Victoria. These hills were once lush woods serving as hunting grounds for the King of Buganda, before being transformed, under British colonial rule, into a modern city. In 1945, the British colonial authorities hired the German modernist planner Ernst May to work on an urban plan of the then rapidly expanding Kampala city. The colonial urban planner used the ‘Garden City plan’ as the theoretical framework around which to organize elements of the city. The Garden City movement, as proposed by Ebenezer Howard in 1898, was an approach to urban planning in which towns of limited size would be planned and surrounded by a ‘green belt’ of agricultural land. This new plan was to allow for a doubling of the Kampala’s population to about 50,000.

In a way, the original plan for Kampala took into account the natural landscape and topography, in that each hill became its own ‘satellite city’ surrounded by a green belt of the naturally occurring wetlands. Kampala is right next to Lake Victoria, and the wetlands create a natural filtration system for runoff water as it goes into the lake. It’s therefore really important to respect the wetlands and not encroach on them.

KAMPALA TODAY: Unfortunately what’s happening in Kampala today, because of the growing population, is that people are starting to build structures in the wetlands and disrupting the natural filtration process. Kampala currently has a population of over 3 million people and accounts for over sixty percent of Uganda’s GDP. According to the Kampala City Council Authority (KCCA), Uganda is experiencing a high rate of urbanization averaging 5.6% per year. Currently, because of poor drainage, there is erosion of the roads and flooding. And because the slums are typically located at the bottom of the hill, the inhabitants experience harsh living conditions during the rainy season and are vulnerable to health risks. There is a separation of classes, with the upper and middle class occupying the top of the hills, while the growing urban poor occupy the bottom of the hills and encroach on the wetlands. These are issues that are difficult to tackle separately, because they are all interrelated. And as a result, the city continues to sprawl as the population increases and people look for new areas to live.

Spreading awareness about understanding and managing urban ecosystem in Kampala is therefore an important and challenging task. What is specific to Kampala is that the issue of the wetlands is tied to the housing shortage that the city is currently facing. The government body NEMA (Natural Environmental Management Authority) that is actively involved in protecting the wetlands and evicting the encroachers, does not have an alternate solution, and so the cycle continues.

Therefore, an important question in the case of Kampala is, how does one provide the much-needed affordable housing in a way that is sustainable and in equilibrium with the surrounding ecosystems? One approach to tackling this question is to engage in multi-disciplinary approaches to learning and sharing knowledge, and to work in ways that integrate theory and practice.

Aerial view of Kampala, showing the wetlands and hills adjacent to Lake Victoria. Photo: Doreen Adengo

Aerial view of Kampala, showing the wetlands and hills adjacent to Lake Victoria. Photo: Doreen Adengo

Adrina Bardekjian

About the Writer:
Adrina Bardekjian

Adrina Bardekjian is the national Urban Forestry Program Manager with Tree Canada. She is a PhD candidate at York University, and a Totten Fellow of the USDA Forest Service.

Adrina Bardekjian

Narratives and creative collaborations for urban forest education

Much of my childhood was spent outside. My sister and I imagined fantastical storied landscapes and acted these out by playing in parks, running on trails and climbing trees. As children, we traveled frequently between Canada and Europe and lived in different cities across continents. With each move, we changed schools, met new friends, and learned different languages. The only constant in our lives was change and the perpetual flow of our existence and understandings of new beginnings and connections.

I became interested in urban ecologies and the ebb and flow of dynamic stories and their energies that traverse the cityscapes and greenspaces we call home. Urban ecosystems are complex and diverse networks of the human and non-human, the built and un-built, and multiple ways of knowing and producing knowledge are integral to holistic learning. Urban forests and tree places are essential learning environments with opportunities for using and uniting alternative models of education, community outreach and citizen engagement. Different ways of knowing and producing knowledge are becoming more widely accepted (and necessary) in urban forestry. Having a variety of learning tools stimulates various parts of our brains and resonates on different levels—intellectually and emotionally. It helps us shape our ideas better and with broader reflection and contributes to a healthy social ecology that influences more inclusive public policies, builds community ties, and fosters a creative culture of stewardship, effectively planning for more sustainable living communities on all levels. Three examples that are particularly meaningful to me are:

Developing policy

The Toronto Cancer Prevention Coalition’s Shade Policy Committee recently used digital storytelling through film and created a video, “Partners in Action”, about the 12-year journey to develop and implement the City of Toronto’s Shade Policy. These efforts were made possible by engaging a multi-disciplinary team of experts, concerned citizens, and community organizations.

Building community ties

In Ireland, Hawthorn trees are rooted in folklore and cultural tradition. This past summer, while traveling, I learned of a story where citizens mobilized with a local historian to save a Hawthorn tree from being demolished for a freeway.

Fostering stewardship

The Truth about Trees is documentary film series produced by a collection of community partners and the USDA Forest Service that is capturing community stories about trees across the United States (I believe we need this in Canada). The main objective of this project is to raise awareness about the importance of trees, both ecologically and socially.

Over the past ten years I have had the privilege of working as a consultant and researcher with diverse organizations and dedicated individuals. I am continually inspired by my colleagues and mentors who have striven to enhance awareness about urban forestry through their collaborations and initiatives across Canada and internationally. Through my work with Tree Canada and the Canadian Urban Forest Network, we are striving to engage communities across the country and provide much-needed infrastructure for greening communities. We are seeing more in urban forestry that students are driven by transdisciplinary and problem-based learning. Cultivation, curation and connectedness are a large part of this conversation; what people know and don’t know about urban greenspaces and urban ecosystem conservation is dependent on who is doing the teaching and ultimately who is framing and telling the story.

Narrative is integral to our work in urban forestry. It renders our own intellectualizing down to a personal level—if you tell someone a story, it resonates. Shared stories bring in the human dimension—about mentorship, giving youth a voice, making complex ideas simple and accessible. Ultimately, narrative propels the imagination to consider and problematize broader issues. In my own doctoral research, interviews with arborists revealed the desire for more apprenticeships due to knowledge being lost as seasoned practitioners leave the profession.

Exploring the connections between our physical and social urban forests through a creative learning commons empowers communities that their voices, both independent and collective, matter in urban forest issues. Alternative models of education in urban forestry, such as oral history, community art (as explored in the recent TNOC round table), and digital storytelling, are useful because they challenge us to move beyond our confines and comfort levels, and to continue our work more collaboratively, free of siloes and with a broader understanding of affect and emotional resonance and resilience.

Sadia Butt Sadia Butt

About the Writer:
Sadia Butt

Sadia Butt is a PhD Candidate at the Faculty of Forestry at the
University of Toronto, Canada. She has worked in urban forestry for
the last 15 years as a practitioner, researcher and a volunteer in
raising urban forest awareness through environmental education.

Sadia Butt

“For the things we have to learn before we can do them, we learn by doing them.”
― AristotleThe Nicomachean Ethics

We often hear that by doing, we learn. When watching students over a few hours of measuring trees in their schoolyard or planting trees for a climate change monitoring project I have seen transformations in knowledge, understanding and relationships. Through my work and volunteering with ACER, an environmental education group based in Mississauga, Ontario, that is headed by a dynamic educator, there have been many heartwarming sessions with students and teachers. The ACER team arrives at the school to impart a scientific protocol to measure trees in a given area. We provide the tools of the trade and the “why it is important to monitor for climate change” and “why these trees our important to the urban green infrastructure”, as well as, show the students how to collect, record and in turn share the data they produce. In some sessions, the children also plant a combination of trees and shrubs in climate change monitoring plots before they learn to measure…all in one day and in shifts of classes. Later, when these children and young adults (grade 6 to 12) produce a baseline database and maps, you can almost see the lights turn on in their heads and their pride in accomplishing something meaningful. Not only do they learn to use a spreadsheet and GIS (tables and maps for the younger students) but they collectively produce a visual graphic of the baseline information they have gathered to share online with students in their school and other schools.

This transformation of knowledge happens in a tactical and visual manner, as well as, with a profound understanding of the role of trees. In countless incidents, where initially young students are thrilled to be outside, while older grades include a mixture of reluctant part-takers and go-getters, all the students leave with an awareness of the trees, themselves and the space that we all take. They become attached to the trees they measured or planted, wanting to name them and to be able to return and nurture them. Many times, those students, too cool for caring, or portraying themselves as trouble makers show resistance to engaging, end up the most attached, wanting to name “my tree” and wanting to plant more trees, dig more holes and ask more questions. The learning leads to more doing!

Apart from the practical and technical information they learn, such as, digging with a shovel, mulching, watering, using tree mensuration tools, they are understanding how they are part of the group, part of nature and that they are  woven into the collaborative task of monitoring nature. They become leaders, observers and teachers, further reinforcing the information we imparted as facilitators and even adding from their experiences.  Students build intricate relationships with each other and trees through the planting and measuring activity and develop a sense of environmental ethics. In one incident non-participating students who vandalized planting plots were exposed by their peers, an unprecedented behaviour, for destroying their plots. These students were enraged that others would violate the freshly planted trees.

Thus, the way we learn and subsequently teach is an important aspect of how we gather knowledge to apply to our work tasks. Urban ecosystems being complex may require that those who have the responsibility to manage them need to engage in hands on training, work with the human and non-human actors that dwell in the space that we our trying to conserve and manage. Often  knowledge is not understood or respected when the experience of it is minimal. It can be attributed to the lack of doing and the lack of opportunities to learn and share knowledge in an inclusive and holistic way.

Lindsay Campbell

About the Writer:
Lindsay Campbell

Lindsay K Campbell is a research social scientist with the USDA Forest Service Northern Research Station’s New York City Urban Field Station

Lindsay Campbell

The ‘science wars’ of the 1990s pitted positivist, quantitative, and realist science against qualitative, post-positivist, or critical approaches. These binaries have become all-too familiar. Some scholars claimed that social scientists suffered from “physics envy” as they tried to emulate methodological approaches from the natural sciences in order to enhance the validity of their claims. Others rejected these attempts and celebrated situated science, where subject and researcher are always already entangled.

Recently, a colleague of mine attended an interdisciplinary conference about humans and nature where the keynote speaker from the public health/active living field called case studies the “dregs” of research. This comment suggests the importance of large sample sizes, precise measurement, experimental design, and control groups to make claims that are scientifically “True” (with a capital T) to inform policy and design.

Clearly, these old lines in the sand are far from settled. Particularly in an era of big data and open data, numbers continue to talk. Quantification, metrics, benchmarks, and targets—these are the ways that ‘sound policymaking’ has come to be understood and framed.  This is particularly so in the arena of sustainability planning, which—since the early days of Agenda 21—has emphasized setting and monitoring sustainability indicators as one of the key steps in policy change.

Yet, for all the attempts to be rational or scientific, policymaking is still a political process—and one that is carried out by thoroughly subjective humans. We are swayed by compelling storylines and important constituencies as much (or more so) than the numbers.

We can observe the confluence of these two strains (norms and numbers) shaping decision-making through case study research on the MillionTreesNYC campaign in New York City, where I live. For years, the NYC Parks Department meticulously collected data on the city’s urban forest. Working with researchers at the U.S. Forest Service (where I work), they calculated the ecosystem benefits of street trees. This argument made ‘business sense’ to former Mayor Bloomberg—and city agencies began working toward setting a citywide tree canopy coverage goal as part of PlaNYC2030—the city’s sustainability plan. Simultaneously and separately, Bette Midler, the entertainer and founder of the nonprofit greening group New York Restoration Project proclaimed that she wanted to “plant a million trees in the city”. This claim was rooted in a personal commitment to greening, particularly in underserved neighborhoods. Filled with a showperson’s flair—this goal was pure storyline. Midler reached the ear of City Hall decision-makers and was brought into the planning process. These two halves were woven together to create the MillionTreesNYC public-private partnership that made both scientific claims and normative arguments about the importance of greening. (The program, launched in 2007, has nearly completed the planting of one million trees citywide.)

So, what is the role for qualitative research—particularly the ‘case study’—in our current era of sustainability planning and green infrastructure initiatives? Qualitative methodologies are helpful for investigating processes and mechanisms, for constructing accounts of complex phenomena. While quantitative approaches can show statistical relationships very well, they are limited in their ability to theorize mechanisms. Case studies help us delve further into questions of how something is occurring. Reliance on numeric models obscures both the uncertainty behind their production and the value-laden decision-making in their deployment. Qualitative accounts help make these clear. They uncover the ways in which current modes of science and knowledge production are always already political: we wield our stats, maps, data, and models toward particular ends. Finally, some of our greatest pieces of knowledge about city planning, urban form, and history have been case studies, idiographic accounts of one person or one place—whether it be Jane Jacobs on New York City or William Cronon on Chicago. As cities continue to go through great transformations, including the growth of megacities, the shift from sanitary to sustainable, and responses to climate change, we need to continue our case study account of how these transformations occur.

Understanding complex social-ecological systems like cities requires interdisciplinary teams and many ways of knowing. These teams should span not only the traditionally called-for areas of social and biophysical sciences, but should bring in perspectives from the arts and humanities as well. We need all of our faculties, senses, thoughts, and feelings to understand (and then re-shape and re-define) our urban systems. The first step toward building these bridges is not to trod over the familiar terrain of the science wars, nor to denigrate one side as “dregs”, but to recognize the value and import of multiple approaches and to bring them into conversation with each other.

Luke Drake

About the Writer:
Luke Drake

Luke Drake is an economic geographer who does action research related to urban agriculture.

Luke Drake

This past summer, a collaborative research project in Trenton, New Jersey (USA), examined how vacant and abandoned properties might be repurposed to increase healthy food access. The project emerged from the work of a Trenton-based non-governmental organization (NGO), Isles, Inc., to call attention to vacant properties and healthy food access. This project was based in the idea that the existing stock of vacant properties might, in various ways, contribute to a better food environment. Proposed solutions could include food production in community gardens and urban farms, as well as repurposing buildings into other food-related businesses. There was no comprehensive inventory of vacant properties, however. We started out with a few important questions. How many vacant properties are there, and where are they located? What would be the best areas or individual properties to target for food-related projects? What do residents want to see happen to those properties? This blog post focuses on the topic of vacancy, and the way that one’s definition of vacancy can affect the understanding and management of urban ecosystems.

With a diverse group of stakeholders—faculty and students from Rutgers University, NGO staff, and city planners—this project relied on different ways of thinking about urban space. Certainly, urban ecosystems are a complex web of social, built, and natural environments, and it became clear to us that different ways of knowing reveal parts that are otherwise hidden when using only one perspective. Take the term “vacant property”—it implies an empty space that is ready and available to be used by others. What is ready and available, however, is not universally understood. We encountered a range of ways to define vacancy in our study, and we saw how those definitions might be incompatible with each other. For those interested in food production, a community garden is already a thriving part of the city, and for the gardeners, it is indeed not vacant. Yet historically in the U.S. (and in countries across the world), these are often unsanctioned and informal sites, and local authorities have long assigned vacant status to such spaces. For local authorities interested in tax revenues and property values, construction is often preferred to something like community gardens as a long-term solution—although cities increasingly zone such spaces as green space or parks, and agriculture is entering zoning codes in some U.S. cities. An unmaintained lot with overgrowth of plants and weeds may be undesirable from both a food and planning perspective, but it may also represent a valuable site of biodiversity and urban habitat in an environmental science perspective. To clean up that site, whether for a garden or a building, potentially takes away that habitat. Furthermore, residents had transformed other so-called vacant lots into dynamic social spaces—using them as backyards and semi-public green space. These sites did not produce food or tax revenues, and the manicured lawns were likely not as biodiverse as an unmaintained lot; but they served important purposes for neighborhoods.

In a study to create an inventory of vacant properties, the choices of how to define vacancy carry ramifications for public agencies, neighborhood social dynamics, and natural environments. The recognition of multiple ways of knowing, however, is not necessarily cause for inaction. Questions posed by Danish geographer and planner Bent Flyvbjerg are helpful in this regard: where are we going, who gains and loses, is this development desirable, and what should we do about it? In our case, we began from the perspective that we should serve community needs, and therefore we did not want to classify those sites as vacant that were already serving those needs.

Bryce DuBoise

About the Writer:
Bryce DuBois

Bryce DuBois is a Doctoral Candidate in Environmental Psychology at the Graduate Center CUNY and works with the Civic Ecology Lab at Cornell

Bryce DuBois

I am steeped in a tradition of studying emotions and behaviors having been educated in the discipline of psychology. But I have turned away from the psychological tradition of describing behaviors and emotions from a normative perspective, and toward an environmental psychology perspective of the most interdisciplinary kind that is embedded in the places that I work in and write about. This is what my program at the CUNY Graduate Center calls a critical perspective, mostly because we ultimately have a desire to upend unequal power relations in places. In the management of urban ecosystems, I view unequal power relations as relating to questions of who has access to learn about and act upon what they have learned. For me, the most interesting sites where I can understand this affective experience and potential inequality is in urban public spaces, such as beaches. It is in these spaces where we can understand Henry Lefebvre’s suggestion that urban space reproduces and reifies social relations. An embodied approach stresses that people develop an understanding of places that are mediated by their physical body, and filtered through their affective experience and the society and culture where they live. In urban public spaces, these everyday experiences are often structured by politically motivated configurations that shape how people live in, interact with, and ultimately develop a relationship with these places. Therefore, an embodied approach can speak to power to make visible how everyday experiences are limited by the form of the material space, and the rules and ideas that construct what is appropriate in the space.

As an example, lets use surfers of the urban public beaches in New York City. Visits to these beaches are regulated to ensure the safety of the visiting public and the valued flora and fauna there. One example of this regulatory approach is that up until 2004 surfing was illegal at Rockaway Beach, because of a fear of letting people swim without the presence of a lifeguard. Since that time, surfers have been allotted two 2-block sections of the NYC parks’ 6.2-mile long beach where the bathymetry of the beach creates the best waves to surf on. In interviews that I conducted with surfers in Rockaway before Hurricane Sandy, they spoke of ecstatic experiences while surfing that included intense emotions such as love and fear. These experiences depend on sand and littoral drift to create preferable wave shapes when wave energy moves up the East Coast.

Beginner surfers in Rockaway Beach. Photo: Bryce DuBois

Beginner surfers in Rockaway Beach. Photo: Bryce DuBois

Therefore, it was a logical conclusion for surfers to restore the sand dunes that had been flattened by Hurricane Sandy to restore the wave shape that they loved. In the summer of 2013, Surfrider worked with the NYC parks department to rebuild dunes using Christmas trees.

Dune stewardship volunteers with Surfrider NYC. Photo: Bryce DuBois

Dune stewardship volunteers with Surfrider NYC. Photo: Bryce DuBois

Furthermore, Sandy highlighted how polluted the water can get because of combined sewer overflow, so Surfrider members have taken to testing water quality to ensure their own safety and to monitor progress on sewage treatment plant improvements throughout the calendar year. It is because of the affective experience of surfing that these surfers have become active in the governance of the Rockaway Beach ecosystem.

How people recreate plays a role in how people come to know and potentially love urban ecosystems. True not all people that surf become stewards of the dune ecosystem, but all surfers potentially embody a different type of knowledge about the beach than non-surfers. Thus, an embodied approach to the study of how people relate to places makes it possible to understand how people learn about and love urban places through their bodies, a love that is key to urban ecosystem governance.

Johan Enqvist

About the Writer:
Johan Enqvist

Johan Enqvist is doing his PhD on the role of civic groups in urban ecosystem management. He wants to know what makes people care.

Johan Enqvist

“In India, you can die from anything but boredom.” This tongue-in-cheek remark was delivered by an Indian man I had joined for a two-day trek in the Western Ghats. Maybe it is a common expression or maybe he was just trying to scare (or impress) me. But he did put the finger on something I came to realize several times in his country: there is always something new to experience, and there is always a different way of knowing it.

The Western Ghats is not only great for hiking but also the source of the Cauvery river, from which most of Bangalore’s water supply is drawn. It is pumped across 100 km and raised over 300 meters, at an immense cost for the city. Why is this needed?

Historically, a network of man-made lakes, or keres, dotted the landscape around Bangalore. Managed by nearby villages, the kere was crucial not only for drinking but also irrigation, domestic needs, religious ceremonies, and fishing. However, with the first connection to Cauvery in 1974 came a new era of rapid demographic, economic and environmental change. Forty years later, most lakes have dried up, been filled with polluted wastewater or simply converted into bus stations or cricket stadiums. Meanwhile, groundwater levels have plummeted and the city has reached the limit of what it can draw from Cauvery to support a population that has grown from less than two to almost ten million.

Framing this situation as a mere failure of lakes management is not telling the whole story. In the exponential growth of the city, every piece of land becomes valuable and the identity of water bodies is highly disputed. Are they traditional keres? Or obsolete pools of wastewater generating malaria and dengue fever? Or potential biodiversity hotspots with havens for birds, fish and amphibians? Or are they recreational spaces, best managed through private-public partnerships to the benefit of the modern city’s amusement economy? Or should they be converted into tanks in a new, decentralized water supply system?

All of these arguments have been made in Bangalore, and several water bodies have been modified to fit with the different ideals. Some citizens prefer idyllic landscaped lakes for their Sunday walks, while others’ livelihoods are crucially dependent on access to water for cattle rearing or open-air clothes washing businesses. There is potential conflict between fishermen and birdwatchers, between gated communities and migrant worker slums, between “localites” living in the area for generations and newcomer techies employed in the booming IT industry.

But amazingly, some inspiring success stories seem to avoid picking sides and instead embrace these differences. Drawing on the knowledge of birdwatchers to rebuild a functioning ecosystem, benefiting from the traditional fisherman’s trained “eyes on the water” for monitoring, acknowledging the traditional custom of idol immersion, and encouraging continued interaction with the restored lake through access for cattle herders and school children, the local community organization mobilizes a multitude of experiences, needs, and ways of knowing. By recreating an urban ecosystem that is intertwined with a broad set of users, legitimacy of the project is strengthened and more people have an interest protecting their common space.

These new bottom-up projects are not solving every problem. Although reports show returning groundwater near restored lakes, the city still faces large-scale water scarcity. But the achievements of these initiatives have motivated dozens of other neighborhood groups around the city to take up similar struggles. By embracing the different types of engagement, experiences, and expertise, Bangaloreans are demonstrating that diversity is not only a great antidote to boredom—it’s also a great asset in urban ecosystem management.

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Nate Gabriel

About the Writer:
Nate Gabriel

Nate Gabriel is an Assistant Lecturer at Rutgers University. His research is on the political ecology of urban parks and sustainability.

Nate Gabriel

For me, the question posed for this round table—“How can different ways of knowing…be useful for understanding and managing urban ecosystems”—begins with a historical question: How have ways of knowing influenced the management of urban ecosystems, and how have they integrated with particular ideas about the city itself? Understanding these histories and their consequences can, to paraphrase Michel Foucault, help to free us from what we silently think, and so enable us to think differently.

In recent years, there has been increasing interest in urban commons. (For the sake of simplicity, I use the term commons to mean “open-access commons”, which are resources to which access is relatively open and free from restriction.) This trend dovetails with another movement toward thinking of cities as “socio-environmental” entities (rather than as strictly socio-economic ones), where environmental commons like air quality, water resources, and green space are seen as not merely supportive of urban functions, but fundamentally integrated into the urban fabric. This pairing has wide-ranging ramifications for how we interact with and reproduce our cities, since common resources have historically been seen as antithetical to the efficient functioning of cities, where privatization or tight government control have been seen as necessary solutions to potential overuse of resources.

In my research, I use urban green space as way of thinking through the ways urban commons are used and regulated. In the mid-19th century, cities in the United States (and elsewhere) became host to scores of large urban parks whose purpose was to provide sites of recreation for the growing working class. In addition to this important function, many urban parks were established as a means of protecting watersheds from industrial development, which had to some extent already begun to pollute vital water supplies. In these ways, parks were a reconfiguration of commons, direct responses to the anticipated free-for-all that would come with the industrialization of urban life.

On the other hand, parks also incorporated woodlands, farmlands, and open fields that were already under heavy use as de facto commons by urban people for a variety of household purposes (hunting, foraging and farming, logging, etc). Thus, the establishment of parks in the 19th century was also a form of enclosure that limited the range of purposes these spaces could serve for urban people, and was more than a simple matter of drawing borders to conserve undeveloped lands. After de facto common lands were reclaimed by city governments, urban people had to re-learn what they were meant to do with these lands, and that was a lesson that they did not take to readily. My research suggests that urban people have continued to use parks for food, medicine, and other economic purposes throughout the 19th and 20th centuries, and into the 21st. (See here and here; also here.)

Nevertheless, such reconfigurations of commons remain a familiar feature of the urban landscape. For example, the Reading Viaduct, a once well-used elevated railway in Philadelphia, was abandoned in the 1990s. Since then, opportunistic organisms have been allowed to thrive there. Thistle, Ailanthus, wineberry, feral dogs and cats, and a few humans have made it their permanent home. Other humans living in homes adjacent to the viaduct have frequently (but illegally) used the site to escape the noisy, fast-paced city. But growing interest in such places, partially the result of the successes of New York City’s High Line and Paris’s Promenade plantée, have resulted in plans to convert the Reading Viaduct into Philadelphia’s own elevated rail park, which will dramatically remake the space into something more akin to other city parks—replacing unruly vines and edible weeds with benches and walking paths—privileging a narrow set of leisure-oriented activities at the expense of all others.

So, what difference would it make to think about urban commons differently? What would it mean to reimagine urban space itself as a commons? How would that change our managerial approach toward urban green space, biodiversity, water, air?

The start of an answer is to recognize that our approach to managing urban commons—for example, the institution of parks as recreational spaces—is a political act that reifies certain notions of the city, nature, and economy at the expense of others. The organization known as Fallen Fruit, which has articulated a vision of urban commons that incorporates edible landscapes, is one good example of an attempt to imagine urban space differently. But the point is that we are always making choices among possible alternatives is inevitable. The question is whether these choices are “silent”, in Foucault’s terms, or spoken so that everyone, including ourselves, can hear them.

Tischa Muñoz-Erickson

About the Writer:
Tischa Muñoz-Erickson

Tischa A Muñoz-Erickson is a Research Social Scientist with the USDA Forest Service’s International Institute of Tropical Forestry (IITF) in Río Piedras, Puerto Rico.

Tischa A. Muñoz-Erickson

How cities think—this was the title of my doctoral dissertation. Not surprisingly, this title provoked a lot of mixed reactions. From those who view cities as physical infrastructures which cannot think, to those who view large social organizations and institutions as having the ability to generate collective thought or worldviews, and therefore the title was nothing groundbreaking. Then there were some that are part of the trend to create Smart cities and found the title to be attractive and intriguing.

Neither one of these views, however, reflected the intention for investigating how cities think. My goal was not to examine what cities think or how they think in a unified cognitive way per se, but rather on the social practices and networks that mediate how different ways of knowing urban systems can co-exist, interact, or conflict. To put it in the context of this blog discussion, I already assumed that different ways of knowing are useful and necessary to understanding and managing urban social-ecological systems. What intrigued me about investigating how cities think were the ways in which those different ‘knowledges’ were managed, integrated, shared, or utilized by different social actors, and therefore how these social relations underlying the production and use of knowledge influence how we envision and design urban systems. In other words, how ways of knowing may or may not be useful.

To illustrate, in the city of San Juan, Puerto Rico, I found that there were multiple types of knowledge, such as scientific, technical, local, and managerial, present and active in the network of actors (organizations) involved in land governance, thus showing potential for the inclusion and integration of diverse ways of knowing into urban ecosystem management. However, deeper analysis of how the network was configured, who the central actors were, and how this knowledge was communicated revealed that there were power asymmetries and fragmentations among actors that kept different ways of knowing from influencing or being used in governance. For instance, state level agencies that relied heavily on technocratic and bureaucratic ways of knowing still dominated the information available about land use and the management approaches towards land governance, even though recent institutional changes towards municipal autonomy demanded more local, bottom up management approaches and information. Thus, even when different ways of knowing existed and should have had the opportunity to influence political opinion and management, social relations and structures kept these alternative ‘knowledges’ from being useful.

My point is that different ways of knowing or of producing knowledge can be useful to the extent that social processes and networks allow their circulation, deliberation, negotiation, and use in decision-making and governance. The utility of different ways of knowing is contingent as much on how the politics of knowledge and expertise (whose knowledge counts) are managed as much as on what they contribute through their content, methods, or theories. Privileging some types of knowledge over others will continue to limit our ability to understand and solve complex problems. From a practical perspective, I propose that capturing the existing configurations, dynamics, and cognitive dimensions of different ways of knowing the city—or how cities think—can help anticipate and assess potential barriers to using different ways of knowing in understanding and managing urban ecosystems.

Camilo Ordoñez

About the Writer:
Camilo Ordoñez

Camilo Ordóñez is a research assistant and instructor at Dalhousie University, Canada. Camilo has research and professional experience in Canada, Europe, and Latin America.

Camilo Ordoñez

Latin America is the most urbanized region on Earth, demographically speaking. It is of no surprise that the region needs to develop a progressive model for managing its urban ecosystems. Many would argue for such knowledge to be based on previous successes in other parts of the world, by, for example, building massive transport networks and designing new buildings based on the idea of social inclusiveness, as it happened in Bogotá and Medellín, Colombia, in the last 10-20 years. This model of new urban design has been mostly positive and helped transform decrepit buildings and roads into modern, functional, and accessible spaces.

Yet, I can’t help but wonder whether these achievements are mere imitations of what is going on elsewhere or if they conform with Latin America’s own idea of urban ecosystem sustainability. This criticism expresses the notion that rather than using the knowledge we have of urban ecosystem services to influence our interpretation of them, we could, in tandem, cultivate the knowledge of ourselves as a determinant of how we value the urban ecosystem. I always find it hard to articulate this idea. So let me add a bit more to it.

One of the guiding questions behind my research is whether experts can really claim to be in the know of how to manage the urban ecosystem if they have a limited understanding of what it means to urban citizens. My work in the last few years has focused on developing a better understanding of what people value in urban forests, that is, the collection of all the natural and planted trees in an urban area. There is a lot of research out there about urban tree services in terms of cleaning the air, reducing attention deficit and crime, and providing a space for recreation, among many others. In some ways, our idea of the importance of urban forests is mostly based on the physiological reactions people may have when surrounded by urban trees. What I wanted to understand was what kind of things mattered to people about urban forests based on a direct experience with them as a way to express the psychological underpinnings behind their deep connection to this vital element of the urban ecosystem.

Based on my urban forest values research in Colombia I see people associate a diverse range of themes with urban forests, from psychological benefits such as calmness and tranquility, to social issues of inclusion, accessibility, and interaction; the aesthetics of views, sounds, feelings, and smells; and tangible and intangible ideas, such as cleaner air and wildlife habitat, or nature connection and admiration, respectively. One of the implications of this research is that a progressive urban forest management directive is not just about planting more trees to provide more services, but about enhancing people’s natural experience of the urban forest to satisfy their values.

With people’s nature experiences being more and more confined to the city, our knowledge of urban ecosystems is defined not just by our professional knowledge of its services, but the knowledge of the values we hold, as urban citizens, in relation to their them. Professional knowledge becomes even more valuable if it can serve as a vehicle to articulate the desires of urban ecosystem dwellers, helping operationalize their own version of urban ecosystem sustainability from an inclusive and integrative standpoint and reducing value trade-off. This is especially true in Latin America, a region with rapidly transforming urban landscapes, in both its ecological and social dimensions. Bogotá’s initiative to protect its urban wetlands and making them accessible by building cycling routes around them is one of the many examples that could be emulated and even enhanced to bring this idea of enhancing the experience of urban nature instead of just optimizing its services.

A participant of the urban forest values studies in Bogotá in a small wetland in the city, which is surrounded by recent plantings of the local “sauce bogotano”, a local tree species of willow. Photo: Camilo Ordóñez)

A participant of the urban forest values studies in Bogotá in a small wetland in the city, which is surrounded by recent plantings of the local “sauce bogotano”, a local tree species of willow. Photo: Camilo Ordóñez)

Philip Silva

About the Writer:
Philip Silva

Philip’s work focuses on informal adult learning and participatory action research in social-ecological systems. He is dedicated to exploring nature in all of its urban expressions.

Phil Silva

This question is predicated on the idea that understanding urban ecosystems is a necessary precondition for managing urban ecosystems. What if this isn’t true? What if we can never completely understand urban ecosystems in a holistic way? Every scholar of urban ecology makes a point of emphasizing the irreducible complexity of these systems. They are “wicked problems” that elude the parsimonious cause-and-effect worldview at the heart of almost any consensus definition of science.

How, then, are we to make sound policy and planning decisions that shape the future of urban nature if we can’t fall back on the knowledge provided by scientific inquiry? Two extreme and opposite viewpoints often present themselves. The first involves barreling ahead as if we actually can acquire concrete and incontrovertible knowledge of the holistic workings of urban ecosystems—despite all the ink we’ve spent arguing otherwise. The second swings wildly in the other direction and has us throwing up our hands in the face of complexity, leaving any planning decision to pure chance. We slide down one of two slippery epistemological slopes; one that ends in false surety and another that ends in know-nothing paralysis.

A philosopher like Nicholas Maxwell might look at the choice between these two extremes and urge us to simply leave these questions of “ways of knowing” and “producing knowledge” aside, striving instead to search for useful wisdom about urban ecosystems. Maxwell argues that traditional knowledge production is not compatible with any concern for usefulness or applicability. The aim of knowledge production is, instead, a gradual increase in our storehouse of tested and immutably proven statements about the way things are. Wisdom, on the other hand, is concerned with figuring out how to make things work in the here-and-now. Wisdom is context-bound and value-laden. Wisdom says, “Maybe—we’ll see what happens” where knowledge says, “Definitely—we can predict what happens.”

Urban planners and policy analysts spent much of the twentieth century looking for immutable knowledge to inform the day-to-day management of cities. It turned out that cities—along with the rest of human society—defied the simplifications wrought from social science, and many a big mistake was made under the cover of “rational” or “empirical” planning. Library shelves are lined with books that bear witness to what happens when silver bullet solutions to complex urban problems only end up making matters worse.

Jane Jacobs, the urban planning critic, built her career on a careful analysis of the unforeseen consequences of applying hard-nosed knowledge to the messy reality of urban life. She called cities problems of “organized complexity” and urged planners to search for useful wisdom in the particulars rather than lean too heavily on one-size-fits-all proclamations of scientific fact. Charles Lindblom, writing for an academic audience shortly before Jacobs published her Death and Life of Great American Cities, made more or less the same argument: rational, scientific planning is all well and good when the whole complex system can be processed and understood. Short of achieving that comprehensive understanding of the whole, we shouldn’t seduce ourselves into believing that our insights are anything but time-bound and contextual, liable to be upended by unforeseen consequences at any future moment.

Scholars of rural environmental management have recently come to similar conclusions about the complex systems they investigate. They write of an “adaptive collaborative management” approach for rural ecosystems that uses incremental a “learn-as-you-go” approach to problem solving for forests, fisheries, and even farms across the globe. Local environmental managers, researchers, community members, and government officials work together in an adaptive co-management process to monitor the outcomes of different management strategies, reflect on what they discover, and adapt their practices from season to season, year to year.

One might argue that the knowledge produced by monitoring the outcomes of different urban environmental management programs is not really knowledge at all. Its chief criterion of validity is usefulness rather than explanatory truth and it makes no claims to applicability across different contexts. A philosopher like Maxwell would likely be more comfortable labeling this sort of insight wisdom rather than knowledge—but for most of us, this is just a matter of splitting hairs. Call it wisdom, call it knowledge, or call it just plain horse sense. The insights that come from taking a step back and assessing what just happened are probably best suited for day-to-day management of complex urban ecosystems. A somewhat stable knowledge of urban ecosystems may result in the process, but let’s be clear—this isn’t the stuff of traditional science. It is knowledge that is good enough for now rather than knowledge meant to last in the form of a universal law.

James Steenberg

About the Writer:
James Steenberg

James Steenberg is an environmental scientist focusing on urban forest ecology and management.

James Steenberg

My current work has me reflecting on models—ecosystem models, that is—and their role in understanding nature in the city. From my viewpoint, anytime an environment, or a system, or a concept, is described in anything but its entirety it becomes a model. This could be through narrative, spatial representation, or ecosystem modelling.

As both researchers and practitioners of and/or in urban ecosystems, we often undertake some form of assumption, abstraction, and aggregation of the real world. We construct a model and therefore omit knowledge. Arguably, the hope is that what has been left behind, whether for the sake of parsimony, practicality, or functionality, does not compromise the model’s utility in describing the ecosystem. This hope is then dependent on what is defined as an ecosystem.

Theoretical discussions on the ecosystem concept no longer view ecosystems as deterministic, stable, or within closed boundaries. They are adaptive, and both scale and context dependent. Importantly, current urban ecological theory now envisions human activities as internal processes that shape ecosystem structure and function, rather than external agents of change and disturbance.

In my own research, I have been attempting to bring this modern urban ecosystem concept from the theoretical to the applied realm. I’m developing a framework for identifying and classifying urban forest ecosystems using quantifiable and spatially explicit variables that represent (i.e., model) their biophysical landscape, built environment, and human population. Ecosystem classification is a form of modelling that attempts to answer the following questions for researchers and practitioners: What does an ecosystem look like? What happened to make it look that way? What will it look like in the future? In such a fashion can they hope to intervene and manage urban ecosystems towards a more desirable state.

steenberg_TNOC_Figure1_2014-12-01 However, in the process of ecosystem classification we knowingly ascribe categorical characteristics to continuous phenomena and draw sharp edges around soft boundaries. This latter issue has been long recognized as a caveat of classifying landscapes – as ecosystems or otherwise. Yet, ecosystem classification has still been recognized as a useful tool for modelling and managing complex systems in its hinterland applications where the emphasis is primarily on biophysical ecosystem components.

In the urban landscape, where the influence of densely-settled human populations and their social structures and institutions on ecosystem processes are so evident, can ecosystem classification still maintain its utility? Can it be adapted to account for these theoretical advancements in urban ecology and the ecosystem concept?

steenberg_TNOC_Figure2_2014-12-01These are my research questions, though I will admit to feeling apprehensive in shifting from the theoretical to the applied. Specifically, the quantification and classification of the ‘human component’ of urban ecosystems is fraught with challenges. For example, ecosystem classification is, in part, a statistical endeavour. As illustrated above, people at that tail end of that distribution curve who occupy the space outside two standard deviations will be the most dissimilar ecosystem components. In urban forest management, this population may be at risk of marginalization—or perhaps equally likely, may be a disproportionally vocal and influential subset of the population and ecosystem. In the context of building ecosystem models, is the omission of social knowledge as acceptable as that of ecological knowledge?

As a researcher, I’m as fascinated by the flaws of ecosystem classification as I am by the possible applications. I do think that applying ecosystem classification in strategic urban forest planning and management can be a valuable way of knowing and of producing knowledge about these ecosystems. Rather, I think this dialogue is the result of examining social processes from my own physical sciences perspective, and thus emphasizing the absolute necessity of inter- and transdisciplinarity within the research and management of urban ecosystems.