Wildlife Habitat Management on College and University Campuses

With the increasing involvement of higher education institutions in sustainability movements, it remains unclear to what extent college and university campuses address wildlife habitat. Many campuses encompass significant areas of green space with potential to support diverse wildlife taxa. However, sustainability rating systems generally emphasize efforts like recycling and energy conservation over green landscaping and grounds maintenance. We sought to examine the types of wildlife habitat projects occurring at schools across the United States and whether or not factors like school type (public or private), size (number of students), urban vs. rural setting, and funding played roles in the implementation of such initiatives. Using case studies compiled by the National Wildlife Federation’s Campus Ecology program, we documented wildlife habitat-related projects at 60 campuses. Ten management actions derived from nationwide guidelines were used to describe the projects carried out by these institutions, and we recorded data about cost, funding, and outreach and education methods. We explored potential relationships among management actions and with school characteristics. We extracted themes in project types, along with challenges and responses to those challenges. Native plant species selection and sustainable lawn maintenance and landscaping were the most common management actions among the 60 campuses. According to the case studies we examined, we found that factors like school type, size, and location did not affect the engagement of a campus in wildlife habitat initiatives, nor did they influence the project expenditures or funding received by a campus. Our results suggest that many wildlife habitat initiatives are feasible for higher education institutions and may be successfully implemented at relatively low costs through simple, but deliberate management actions

Exploring Stakeholders’ Perceptions of Urban Growth Scenarios for Metropolitan Boston (USA): The Relationship Between Urban Trees and Perceived Density

Achieving multiple goals rather than trading one goal off for another is the essence of sustainability. Visualizing alternative futures in a participatory planning process helps disentangle complex planning issues particularly when stakeholders may perceive key goals as imposing potential tradeoffs, such as increased housing for a growing population and availability of green space. This study explored the effects of using visualization and scenarios as planning tools in a workshop with stakeholders in the Boston Metro Area, Massachusetts (USA), in achieving multiple benefits of sustainable future growth of the region. We applied mixed methods sequential explanatory design and a survey instrument with a landscape preference survey designed to garner stakeholders\u27 preference and acceptability of perceived urban density versus urban greening in four future growth scenarios reflecting multiple goals in sustainability. The results of the landscape preference survey demonstrated that increasing tree canopy appears to ameliorate the low ratings of high-rise buildings for the region\u27s urban development. In addition, the scenario planning process, especially the use of small group discussions, represented an effective tool in facilitating stakeholders\u27 discussion about achieving the multiple benefits of the three goals of sustainability: Environment, Economy, Equity. This study provided theoretical and applied insights for planners in the use of visualization and scenario planning methodologies to engage stakeholders in the participatory planning process. It revealed the potential for a policy decision shift among stakeholders in the Boston region, namely that higher density urban development would likely be more acceptable to them when combined with a simultaneous increase in tree canopy cover. Through practices like these, stakeholders are more likely to consider policies and designs that embrace a variety of goals for their community’s future instead of simplistically placing one goal in opposition to another or trading them off against each other

Exploring the Ecology of Establishing Oak Trees in Urban Settings of the Northeast

Urban forests notoriously lack diversity in the biological communities that inhabit them, from the age and species composition of street trees to wildlife populations. In reaction to invasions of nonnative insects and diseases as well as predicted response to climate change, an emerging number of community foresters and tree wardens are expanding their urban tree planting practices to include a broader assemblage of tree species. These include oaks, among other species able to tolerate and adapt to urban conditions. Oaks are potentially favorable in regions like the northeastern U.S., where they grow extensively in rural forests and demonstrate potential resistance to specific urban pests that have caused challenges for other historically popular and extensively planted street trees. Additionally, they are known to feature a number of wildlife benefits, and their ranges in the Northeast are predicted to expand under many future climate change forecast models. We examine the role of oaks in the urban environment through the lens of the urban forest diversity deficit, reviewing topics that include diversity recommendations, threats by nonnative insects and diseases, and the human-wildlife interface. The goal of this work is to encourage careful consideration of where and when to plant oak trees to help professionals address issues of uniformity, while achieving benefits for urban forest ecosystems and residents

Balancing Urban Biodiversity Needs and Resident Preferences for Vacant Lot Management

Urban vacant lots are often a contentious feature in cities, seen as overgrown, messy eyesores that plague neighborhoods. We propose a shift in this perception to locations of urban potential, because vacant lots may serve as informal greenspaces that maximize urban biodiversity while satisfying residents’ preferences for their design and use. Our goal was to assess what kind of vacant lots are ecologically valuable by assessing their biotic contents and residents’ preferences within a variety of settings. We surveyed 150 vacant lots throughout Baltimore, Maryland for their plant and bird communities, classified the lot’s setting within the urban matrix, and surveyed residents. Remnant vacant lots had greater vegetative structure and bird species richness as compared to other lot origins, while vacant lot settings had limited effects on their contents. Residents preferred well-maintained lots with more trees and less artificial cover, support of which may increase local biodiversity in vacant lots. Collectively, we propose that vacant lots with a mixture of remnant and planted vegetation can act as sustainable urban greenspaces with the potential for some locations to enhance urban tree cover and bird habitat, while balancing the needs and preferences of city residents

Urban socioeconomic inequality and biodiversity often converge, but not always: A global meta-analysis

It is through urban biodiversity that the majority of humans experience nature on a daily basis. As cities expand globally, it is increasingly important to understand how biodiversity is shaped by human decisions, institutions, and environments. In some cities, research has documented convergence between high socioeconomic status (SES) and high species diversity. Yet, other studies show that residents with low SES live amid high biodiversity or that SES and biodiversity appear unrelated. This study examines the conditions linked to varying types of relationships between SES and biodiversity. We identified and coded 84 case studies from 34 cities in which researchers assessed SES-biodiversity relationships. We used fuzzy-set Qualitative Comparative Analysis (fsQCA) to evaluate combinations of study design and city-level conditions that explain why SES-biodiversity relationships vary city to city and between plants and animals. While the majority of cases demonstrated increased biodiversity in higher SES neighborhoods, we identified circumstances in which inequality in biodiversity distribution was ameliorated or negated by disturbance, urban form, social policy, or collective human preference. Overall, our meta-analysis highlights the contributions of residential and municipal decisions in differentially promoting biodiversity along socioeconomic lines, situated within each city’s environmental and political context. Through identifying conditions under which access to biodiversity is more or less unequal, we call attention to outstanding research questions and raise prospects for better promoting equitable access to biodiversity

What Does It Take to Achieve Equitable Urban Tree Canopy Distribution? A Boston Case Study.

Considerable attention has been paid to the benefits that urban trees provide and recent research has focused on how the distribution of trees in the urban landscape is affected by socioeconomic processes like social stratification, as indicated by associations with income, race, ethnicity, and education. These studies have found marked disparity in urban canopy cover, with primarily low income and minority neighborhoods commonly being underserved. However, few studies have investigated the potential to overcome urban canopy inequities through urban planning and reforestation. This question becomes even more important as many U.S. cities pledge to increase urban canopy cover as part of larger climate change mitigation strategies. Can today’s heavily developed U.S. cities use these tree planting initiatives to increase equity in urban canopy cover while still providing the infrastructure and housing necessary for expected population growth? This case study characterizes the socioeconomic drivers of the current urban canopy cover in Boston, Massachusetts, and further explores the possibility of distributing trees to increase equitable access to environmental justice and ecosystem services, while meeting housing and infrastructure needs. Results suggest that even when tree planting initiatives focus specifically on increasing canopy cover for environmental justice communities, equitable distribution of urban trees is difficult to achieve. Our findings indicate that difficulties arise not only from the expected policy and funding aspects, but also from ecological ones, including the physical availability of tree planting sites in environmental justice communities

Sustaining Urban Forests in Post-Industrial Cities: Place Attachment, Ecology, and Stewardship Potential

People value urban green spaces for enjoying nature and socializing with friends, family, and other park users. However, overgrown urban forests without clear access points can be perceived as dark, dangerous, and wild places. As many cities experience reduced budgets, they struggle to maintain green spaces established in more prosperous times. We conducted a descriptive analysis of how constrained parks budgets and subsequent city decisions about maintenance are associated with patterns of forest use, place attachment, and social capital and their impacts on the potential for stewardship of forested parks. We selected Springfield, Massachusetts for our study because it is typical of former industrial cities with highly constrained budgets. We used both qualitative and quantitative analyses of field observations and interviews with park users and nearby residents. We found that access to forests and park use were the strongest predictors of place attachment, and that on-site services, access, and maintenance level were the strongest predictors of use rather than surrounding socioeconomic conditions. Users valued the ecology of the sites, even while park managers highlighted invasive plants as a major maintenance issue. Even though many sites had low levels of use, there remains a strong sense of ownership, community, and safety. Taken together, there is a great deal of untapped stewardship potential in the city, with few organized avenues for users and residents to engage in stewardship. The findings support the hypothesized ‘virtuous circle’ whereby higher levels of maintenance and access beget greater use and attachment, which motivates stewardship. Alternatively, the more neglected forested parks become, the less use they will have, and the more unknown and unloved they will become. In high use sites, some outreach may be all that is needed to move into the ‘virtuous circle,’ while greater interventions will be needed in low use sites with no facilities, and these sites are the ones at greatest risk. Since the long-term sustainability of urban forests requires that local residents appreciate, use, and steward them, Springfield and other post-industrial cities need to find creative models for supporting greater involvement of residents in park stewardship while recognizing these residents frequently inhabit communities under stress

Scenario Planning for the Boston Metropolitan Region: Exploring Environmental and Social Implications of Alternative Futures

The Boston Metropolitan Area Urban Long-term Ecological Research Area (BMA-ULTRA-EX) Project is an interdisciplinary project that is studying the effects of socio-economic and biophysical drivers on urban ecosystems. The Boston region is experiencing low-density urban sprawl (suburbanization) on the rural-urban fringes of the metropolitan area that is creating environmental impacts to natural resources. At the same time, central cities such as Boston are seeing disinvestment in some low-income neighborhoods causing property abandonment, along with limited infill development (densification) near the commercial core and transit hubs. These competing socio-economic forces of suburbanization, densification, and disinvestment have environmental implications for urban ecosystems, including urban forest canopy, water quantity and quality, and biodiversity. Landscape planning initiatives to address these issues will require a pro-active approach to concentrating development on currently built lands and in the suburban fringe to protect forests, farms and other natural resources, while greening and enhancing ecosystem services in the current high-density urban core. It is within this landscape planning setting that the research team used a stakeholder- driven process to develop a set of four planning scenarios to explore the future of the region. This paper will describe the planning process with stakeholders to develop these plans, along with the preliminary analyses. It will conclude with insights for other landscape planners engaged in scenario planning

Effects of Urbanization on Native Bird Species in Three Southwestern US Cities

Urbanization presents novel challenges to native species by altering both the biotic and abiotic environment. Studies have attempted to make generalizations about how species with similar traits respond to urbanization, although existing results are idiosyncratic across cities and often fail to account for seasonality. Here, we present a comparative study in three US cities: Fresno, California; Tucson, Arizona; and Phoenix, Arizona. Using presence-absence data to define regional bird species pools and urban assemblages in non-breeding (winter) and breeding (spring) seasons, we tested whether urban avian assemblages were a random subset of regional assemblages on the basis of both traits and phylogeny, and whether urbanization was associated with homogenization among avian assemblages. We found evidence for non-random trait filtering into urban assemblages, including of diet guilds, migratory status, and primary habitat, but filtering differed across cities and seasons, being strongest for diet and in Fresno. There was no evidence for non-random phylogenetic-based filtering in urban avian assemblages. Dissimilarity in species and diet guild composition within each season was higher between cities than between regional species pools. These findings show the potential for biotic differentiation as opposed to homogenization as the outcome of environmental filtering processes operating on species traits across cities and seasons

Long‐term Effects of Land‐Use Change on Bird Communities Depend on Spatial Scale and Land‐Use Type

Land‐use transformation is one of the most important and pervasive ecological changes occurring across the Earth, but its long‐term effects are poorly understood. Here, we analyze the effects of urban and agriculture development on bird biodiversity and community structure over a 16‐yr study period. We found that long‐term effects of land‐use change are dependent on spatial scale and land‐use type. At the regional scale, we found that gamma diversity (total number of species observed) declined by ~10% over time. At the landscape spatial scale, we found that beta diversity (uniqueness of bird communities) increased by ~16% over time. Additionally, the average contributions of urban riparian bird communities to beta diversity were generally the highest but declined by ~26% over the study period. Contributions of urban communities to beta diversity were generally the lowest but increased by ~10% over time. At the local scale, we observed different responses for different measures of alpha diversity. For bird species richness, temporal changes varied by land use. Species richness declined 16% at sites in desert riparian areas but increased by 21% and 12% at sites in urban and agricultural areas, respectively. Species evenness declined across all land uses, with some land uses experiencing more rapid declines than others. Our analysis of species groups that shared certain traits suggests that these community‐level changes were driven by species that are small, breed onsite, and feed on insects, grains, and nectar. Collectively, our results suggest that biodiversity declines associated with land‐use change predominate at the regional and local spatial scale, and that these effects can strengthen or weaken over time. However, these changes counterintuitively led to increases in biodiversity at the landscape scale, as bird communities became more unique. This has implications for conservation and management as it shows that the effects of land‐use modification on biodiversity may be positive or negative depending on the spatial scale considered.Funding was provided by the National Science Foundation Long‐Term Ecological Research Program (DEB‐9714833, DEB‐0423704, DEB‐1026865, DEB‐1637590, and DEB‐1832016). Open Access fees paid for in whole or in part by the University of Oklahoma Libraries.Ye