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“And They Are Still the Guardians of These Sacred Waters …”: Land as a Process of Reconciliation.
Given that Indigenous Peoples in Canada continue to face health disparities as a result of ongoing colonial attempts at genocide, reconciliation requires using a decolonized health framework that identifies oppression and marginalization while seeking to improve Indigenous Peoples’ health and facilitates a shared understanding of well-being. Community and land-based interventions hold promise in providing insight into how the reconciliatory process can occur and have been shown to successfully address the health disparities experienced by Indigenous Peoples by connecting participants to their kin, culture, and identity. However, the impact of these interventions on facilitators, both Indigenous and non-Indigenous, is lesser known. This qualitative study explores the reconciliatory effects of a decolonized framework on 10 Indigenous and ally community-engaged facilitators during a land-based healing lodge using semistructured pre- and postinterviews. Findings indicate that engaging with the land as an equitable research partner while being reflective allows facilitators to develop a decolonized relationship with the place an intervention is being held, themselves, and effectively engage with the partner community. Furthermore, by implementing a decolonized approach to culturally centered interventions, several facilitators’ perspectives of healing transitioned from understanding healing as an outcome to a holistic process that engages place and the broader ecology. These findings signal a need for those working toward reconciliation (e.g., researchers, evaluators, health and health-allied professionals) to consider the influence of Indigenous ways of knowing and being on both Indigenous and non-Indigenous individuals involved in the healing process.
Read moreA Review of the Effects of Climate Change on Visitor Use in US Public Lands and Waters
Figure 1. A conceptual diagram of how climate change is affecting visitor use in public lands and waters, and how changes to visitor use can affect operations of public lands and waters. NPS Climate change is affecting recreational visitor use in U.S. public lands and waters, causing changes to visitation levels, timing of trips, activity participation, and visitor safety. This report reviews the literature on how climate change is influencing visitor use in the United States and how visitor use may be affected in the future. Our goal is to provide the current state of the literature for managers of public lands and waters and provide foundational information for the development of a climate change vulnerability assessment methodology for visitor use within the National Park Service (that may be applicable to other federal lands and waters). Specifically, we investigate how seven different climate change factors may affect visitor use on public lands and waters. These factors consist of increasing temperatures; flooding, drought, and increased variability of precipitation; decreasing snowpack and earlier spring runoff; wildfires, smoke, and air quality; coastal hazards: hurricanes and sea level rise; harmful algal blooms (HABs); and zoonotic and vector-borne disease. The current research indicates that these factors are already affecting visitors to public lands and waters and continued effects in the future are likely as the climate warms. Additionally, we summarize existing research on how visitors to U.S. public lands and waters are adapting to climate change. Throughout the review, we note where there are substantial gaps in the literature and more research would help managers respond to the effects of climate change on visitor use.
Read moreAdapting Visitor Use Management Under a Changing Climate Across the U.S. National Park System Author Links Open Overlay Panel
Research shows that climate change is already affecting both resources and visitors in U.S. National Parks. We sought to better understand if and how park staff across the National Park Service are adapting to climatic changes that affect visitor use, as well as barriers and challenges to adaptation and information needs. We conducted semi-structured qualitative interviews with 63 staff from 31 representative national park units across the United States. We qualitatively coded interviews for themes using deductive and inductive coding approaches. Results indicate that park staff are already taking action to adapt to changes that are affecting visitor use, including efforts to increase resiliency of infrastructure and to support the health and safety of visitors (e.g., increased communication, preventative search and rescue, changes to programming). Common barriers and challenges include institutional factors (such as funding, staffing capacity, and shifting priorities), uncertainty about future conditions, and difficulties with prioritizing climate adaptation. Park staff relayed varied needs for data, tools, and information, but commonly indicated a need for social science data and tools to help synthesize, standardize, and translate climate information. These results provide insights into current actions park staff are taking to adapt to climate change and what resources may be helpful in the future to lower the challenges and barriers to adaptation. Highlights Climate change is affecting visitor use in U.S. National Park Service (NPS) units. NPS staff are taking actions to respond and adapt to the effects on visitor use. Actions are related to visitor infrastructure, safety, and services, among others. Challenges to visitor use adaptation include funding, staffing & future uncertainty. Staff report needing social science data and tools to translate data to action.
Read moreCharacterizing Social and Ecological Values Expressed in US Forest Service Public Comments Using a Computational Approach
Addressing social and ecological values is a central aim of democratic environmental management and policymaking, especially during deliberative and participatory processes. Agencies responsible for managing public lands would benefit from a deepened understanding of how various publics value those lands. Federal land management agencies receive millions of written comments from the public on proposed management actions annually, providing a unique source of insights into how the public assigns value to public lands. To date, little attention has been directed towards methods for analysing the public’s comments to understand their expressed values, in part because the volume of comments often makes manual analysis unworkable. This study introduces and applies a novel computational approach to inferring values in written text by using natural language processing and a method that combines a lexicon with semantic embedding models. We developed embedding models for four types of values that are expressed in public comments. We then fit models to 409,241 public comments on actions proposed by the United States Forest Service from 2011 to 2020 and regulated by the National Environmental Policy Act. The embedding model generally outperformed the lexicon word-count, particularly for value types with shorter lexicons, and, like human evaluators, the embedding models performed better for more evident values and were less reliable for more abstract or latent values. By applying the resulting model, we furthered our understanding of how the public values National Forest lands in the United States. We observed that aesthetic and moral values were expressed more often in comments for projects that received more public interest, as gauged by the number of comments a project received and in comments for projects addressing recreational management. Related Media Plain Language Summary: A computational approach for characterizing values for nature: A case study with US Forest Service public comments. (May 5, 2025)
Read moreCharting a Path to Health for All at Net-Zero Emissions
Climate change is the defining health challenge of the 21st century, with record-breaking temperatures and extreme weather events already exacting an unprecedented toll on human health and wellbeing. Scientific consensus is clear: rapid and deep reductions in greenhouse gas (GHG) emissions by 2050 are needed not only to reduce the risks of exceeding climate tipping points beyond which irreversible damage occurs to natural systems, but also to safeguard human health, wellbeing, and equity. Despite growing awareness of the climate–health nexus, climate interventions often fail to consider opportunities to maximise co-benefits.
Read moreCoding Manual for Adolescent-Nature Interactions at a Youth Group Home
This technical report provides our coding manual – our systematic method to code qualitative photovoice data – from a study of nature interactions supporting coping and resilience among adolescents with histories of trauma living in a youth group home. Using the interaction pattern method detailed in this coding manual, we coded interview data from 12 adolescents about their meaningful nature interactions. A total of 1212 (Level 1) IPs were coded in these data from the participant’s interviews and categorized into 62 Level 3 IPs such as viewing nature from a different vantage point, moving along the edges of nature, foraging or harvesting edibles to eat or drink, experiencing periodicity of nature, or experiencing nature with others. Related Media Q&A: UW Researchers Examine Mental Impact of Girl Scouts’ Interactions With Nature (April 21, 2025)
Read moreDemographic and Geographical Determinants of Human Olfactory Perception of 909 Individuals Inhabiting 16 Regions
The hedonic perception of odors is similar worldwide. However, our perception of smells is much more than just determining whether an odor is pleasant or not. Here, we expanded this assessment by recruiting 909 people from 16 regions of the world and measuring 12 perceptual dimensions (e.g., pleasantness, intensity, edibility), which were aggregated into an olfactory perceptual fingerprint. We used two fingerprints: descriptor-specific and odor-specific. Age, gender, and region explained 1.1%, 0.3%, and 9.6% of variance in the descriptor-specific fingerprints, respectively. Similarly, age, gender, and region explained 0.5%, 0.3%, and 8.2% of variance in the odor-specific fingerprints. Interestingly, odor intensity was more regionally dependent than pleasantness. Thus, olfactory perception across the globe may be better differentiated by odor intensity than pleasantness. Although there is some influence of individual and cultural backgrounds, human perception of odors appears to be quite similar worldwide, even when assessed using 12 perceptual dimensions. Highlights Olfactory perception of 909 people from 16 regions was evaluated Human perception of odors appears to be quite similar worldwide Olfactory perception worldwide is better differentiated by intensity than hedonics Age and gender had a limited impact on individual perception of odors
Read moreForest Terpenes and Stress: Examining the Associations of Filtered vs. Non-filtered Air in a Real-Life Natural Environment
Human health may benefit from exposure to a class of biogenic volatile organic compounds (BVOCs) consisting of isoprene units, known as terpenes. In this double-blind, randomized crossover trial, participants sat in a forest for two 60-min sessions, one in which terpenes were filtered out of the ambient air they breathed, and another in which they were not, separated by a minimum of an eight-day washout period. The primary outcome was the high frequency (HF) component of heart rate variability (HRV; measured continuously). Secondary outcomes included skin conductance levels (SCL) (measured continuously), self-reported stress and affect (measured every 20 min), blood pressure, heart rate, cortisol and inflammatory cytokines (measured before and after sessions). Serum concentrations of terpenes (measured before and after sessions) were also assessed to investigate the association of absorbed dose with these outcomes. We did not observe a significant association of filter condition with most outcomes; although the trends for affect, systolic blood pressure, cortisol, TNF-α, and CRP were all in the hypothesized direction. We did observe a significant association with interleukin-6, which was −0.19 pg/mL lower in the terpenes-on vs. terpenes-off condition, adjusted for baseline (95 % CI: −0.35, −0.03); and SCL over the session as a whole. A sensitivity analysis of the subset of data from participants who completed both conditions supports these findings and revealed additional significant associations with SCL (95 % CI: −1.87, −0.05); and TNF-α (95 % CI: −2.63, −0.10). To our knowledge, this is the first RCT to filter terpenes from ambient air during forest contact. Highlights Powered Air Purifying Respirator (PAPR) helmets filtered terpenes from forest air. Psychophysiological and immunological correlates of stress were assessed. IL-6 serum levels lower after sessions with terpenes-on vs. terpenes-off filter. Skin conductance levels (SCL) lower across time with terpenes-on vs. terpenes-off. All other outcomes not significant, but many trended in the hypothesized directions. Keywords Terpenes; Forest; Nature; Health; Stress
Read moreGreenspace Proximity in Relation to Sleep Health Among a Racially and Ethnically Diverse Cohort of US Women
Sleep is essential for overall health. Greenspace may contribute to sleep health through, for instance, improving mood, reducing sleep disruptors (e.g., poor air quality), and promoting physical activity. Although greenspace likely differs across populations, few studies have included diverse populations. To investigate greenspace-sleep health associations, overall and by age, race and ethnicity, and socioeconomic status, we used data collected at enrollment (2003-2009) from women in the Sister Study (n=1,612 Hispanic/Latina, n=4,421 non-Hispanic (NH)-Black, and n=41,657 NH-White). Participants’ geocoded home addresses were linked to NASA’s Moderate Resolution Imaging Spectroradiometer Normalized Difference Vegetation Index data (250m resolution) to capture greenspace tertiles (further categorized as low/moderate vs. high). Participants reported seven sleep dimensions, which we assessed individually, along with a multidimensional sleep health measure (categories: favorable, moderate, poor). Adjusting for individual- and environmental/neighborhood-level characteristics, we used Poisson regression with robust variance to estimate prevalence ratios and 95% confidence intervals (PR[CI]). We tested for interaction and estimated age-, race and ethnicity-, and educational attainment category-specific associations. Among participants (mean±SD age=55.7±9.0 years), those with low/moderate vs. high greenspace had a lower prevalence of favorable sleep (58% vs. 66%). After adjustment, low/moderate vs. high greenspace was associated with a 32% higher prevalence of moderate (PR=1.32 [1.27-1.38]) and 12% higher prevalence of poor (PR=1.12 [1.07-1.16]) vs. favorable sleep health. Magnitudes of associations were higher among NH-White women vs. minoritized racial-ethnic groups and women with higher vs. lower educational attainment. Higher greenspace was associated with favorable sleep, with stronger associations among groups with more social advantages. Highlights Few prior studies of greenspace and sleep included socially diverse samples. We investigated associations between greenspace proximity and sleep among US women. Effect modification by age, race-ethnicity, and socioeconomic status was assessed. Low/moderate greenspace proximity was associated with poorer sleep health. Associations were strongest among women with more social advantages.
Read moreLeveraging Digital Mobility Data to Estimate Visitation in National Wildlife Refuges
Figure 6. Predictive power (R2) of nine different visitation models. The first (Mobility + Refuge) is the combined model that uses all the digital mobility data and a fixed effect for refuge. The second (Mobility) uses all the digital mobility data but does not include an effect for refuge. Each bar shows the amount of variability that is explained by each predictor in that model, calculated as the General Dominance. The other columns are the total R2 values of simple linear regression models which regressed a single predictor against observed visits. They are named for the model predictor. The US Fish and Wildlife Service manages over 500 National Wildlife Refuges and dozens of National Fish Hatcheries across the United States. Accurately estimating visitor numbers to these areas is essential for understanding current recreation demand, planning for future use, and ensuring the ongoing protection of the ecosystems that refuges safeguard. However, accurately estimating visitation across the entire refuge system presents significant challenges. Building on previous research conducted on other federal lands, this study evaluates methods to overcome constraints in estimating visitation levels using statistical models and digital mobility data. We develop and test a visitation modeling approach using multiple linear regression, incorporating predictors from eight mobility data sources, including four social media platforms, one community science platform, and three mobile device location datasets from two commercial vendors. We find that the total number of observed visitors to refuges correlates with the volume of data from each mobility data source. However, neither social media nor mobile device location data alone provide reliable proxies for visitation due to inconsistent relationships with observed visitation; these relationships vary by data source, refuge, and time. Our results demonstrate that a visitation model integrating multiple mobility datasets accounts for this variability and outperforms models based on individual mobility datasets. We find that a refuge-level effect is the single most important predictor, suggesting that including site characteristics in future models will make them more generalizable. We conclude that statistical models which incorporate digital mobility data have the potential to improve the accuracy of visitor estimates, standardize data collection methods, and simplify the estimation process for agency staff.
Read moreNational Park Service Staff Perspectives on How Climate Change Affects Visitor Use
Three bikers traveling through the Swan Lake area at Yellowstone National Park in the spring. As temperatures increase due to climate impacts, shoulder seasons in parks may allow for more warm-weather activities. Credit: NPS / Jacob W. Frank. Many public lands, including those managed by the U.S. National Park Service (NPS), have the purpose of conserving natural and cultural resources and providing opportunities for visitors to recreate in and enjoy these areas. Achieving this mission becomes more challenging as drought, flooding, increasing temperatures and other climatic change effects are impacting NPS lands and visitors and affecting factors such as visitation, recreation access and health and safety among other aspects of park operations. However, the literature lacks insights from staff dealing with on-the-ground climate impacts to visitor use. To address this gap, we held semi-structured interviews with 63 staff from 31 NPS units across the United States (U.S.) to better understand the effects of climate change on visitor use. We qualitatively analysed the interviews using both deductive and inductive methods to identify key themes. Interview participants consistently noted that climate change is already affecting visitor use at their parks. For instance, increasing temperatures are negatively affecting both staff and visitor safety at parks nationwide, whereas all coastal parks within our sample are already experiencing impacts from sea-level rise or more frequent and severe coastal storms and hurricanes. Other impacts include reduced recreational access, damaged infrastructure and cultural resources and diminished visitor experiences due to fire and smoke. Similarly, concerns about future impacts often revolved around the health and safety of visitors and staff—particularly related to wildfire and smoke, water quality and availability, and increased heat—and climate change forever altering parks. Our research shows staff in parks and protected areas are noticing effects of climate change on visitor use; some of these impacts have not been previously documented in the scientific literature. Study results highlight future visitor use management research needs and key topics to consider for visitor use planning processes.
Read moreNature Contact and Health Risk Behaviours: Results From an 18 Country Study
Emerging evidence suggests that residential greenspace is associated with a lower prevalence of health risk behaviours, but it remains unclear whether these effects are generalizable across countries or different types of nature contact. Using representative cross-sectional samples from 18 countries/regions, we examined the associations between two types of nature contact (greenspace, nature visits), current smoking and everyday drinking. After controlling for a range of covariates, greenspace was inversely associated with current smoking and everyday drinking. Visiting natural spaces at least once a week was linked to a lower prevalence of current smoking, but unrelated to everyday drinking. Increasing residential greenspace could be a promising strategy for reducing multiple health risk behaviours, whilst visit-based interventions may be a more appropriate target for smoking cessation. Highlights Examined the links between nature and health-risk behaviours in 18 countries. Greenspace predicted lower current smoking and exceeding alcohol guidelines. Weekly nature visits were associated with a lower prevalence of current smoking. Greenspace-behaviour associations were largely consistent between countries.
Read moreParks and Social Capital: An Analysis of the 100 Most Populous U.S. Cities
Figure 1. 2024 ParkScore methodology. Each city receives two values in the ParkScore index: a rating on a scale of 100 points (100 is high) and a ranking, with each city ranked on a scale of 1–100 (1 is high), regardless of the magnitude differences among rating scores. In recent years, much attention has focused on strategies to reverse the decline of social capital in the United States. Increased social capital, which includes both intergroup contact and civic engagement, has many important benefits. For low-income individuals, friendships with high-income individuals (“economic connectedness”, a measure of inter-group contact) are one of the strongest predictors of their ability to escape poverty and gain increased life opportunities. Volunteering, a measure of civic engagement, is hypothesized to be key in building trust among neighbors. Urban parks are often thought to be a ‘third place’ that may increase social capital within a community through both increased “mixing and mingling” and increased civic engagement. This study finds that residents of cities with better quality park systems (as measured by the ParkScore® index) are more socially connected and engaged with their neighbors (as measured by the Social Capital Atlas) than are residents of cities with lower-ranking park systems. Relative to the bottom 25 ranked cities, the top 25 ParkScore cities had 26 % more social connections between different income groups, 61 % more volunteers per capita, and 45 % more civic organizations per capita. These patterns held after controlling for other factors such as education, race/ethnicity, poverty, and family structure. These other factors often had stronger associations with the social capital indicators, suggesting park systems are an important, but not primary, driver of a community’s social capital. People living in cities with more parks and recreational opportunities may be more likely to realize these important benefits. Highlights Residents of cities with highly-ranked park systems are more socially connected than those in lower-ranked cities. Park systems are an important, but not primary, driver of a community’s social capital. Social capital has important benefits e.g. economic mobility for low-income individuals and increased trust among neighbors.
Read morePlanning for Your CANOE (Circumspect Awareness and Navigation of Outcomes and Expectations) Journey in Community-Engaged Research With Indigenous Communities
Community engagement has long been recognised as necessary for working with Indigenous communities. Although many researchers are excited to engage with communities and many articles describe the process of community engagement in research, almost none have addressed the foundational question of whether researchers should engage with Indigenous communities for research. In this Viewpoint, we will discuss the Circumspect Awareness and Navigation of Outcomes and Expectations (CANOE) approach, which describes what should be considered before embarking on a community-engaged research journey with Indigenous communities. We build on existing literature regarding understanding the need to recognise positionality, practise reflexivity, assess personal strengths and weaknesses, and consider abilities and skills that can be offered or promised to Indigenous partners. Our goal is to provide principles of being reflexive, intentional, and careful before launching into research with Indigenous communities. Drawing from our combined decades of experience as Indigenous, community-engaged scientists leading national and international community projects, we draw from the extant literature and lessons learned in the field to provide a guiding CANOE approach for community-engaged research. This Viewpoint provides researchers interested in community-engaged projects with the information they need to consider before embarking on their research journey. We provide a set of CANOE self-assessment questions designed to evaluate a researcher’s preparedness, suitability to invest in a research partnership, and adaptability to navigate a research journey with Indigenous communities. Not only should relationships be properly developed and nurtured, but researchers need to fundamentally understand their ability to develop research partnerships that prioritise Indigenous cultural worldviews and protocols in research design, development, testing, and implementation.
Read morePsychological Ecosystem Services
The nonmaterial benefits of Cultural Ecosystem Services (CES) include categories that are related to personal and community identity, recreation, cultural diversity, heritage, support of knowledge systems, spiritual experiences, and well-being. In many ways, Psychological Ecosystem Services (Psych ES) are a type of CES, though the fields from which this research come differ somewhat with respect to epistemological foundations. Psych ES include the diverse ways in which nature contributes to the mental and emotional well-being of individuals and communities, and encompass the psychological benefits derived from interactions with natural environments. Some CES approaches and outcomes include nonmaterial benefits that are only indirectly related to Psych ES, while others are directly overlapping and use terms that are explicitly included within the scope of Psych ES. A distinction between them lies both in how the outcomes are typically measured and in what the measures and operationalizations of these outcomes are. We discuss these points in detail throughout this chapter.
Read moreSafeguarding Nature and Cities in a Burning Country
Raging fires around Los Angeles are another stark reminder of how deeply our lives are intertwined with nature. Fires in the western USA — as with fires around Athens, Sydney or Valparaiso — expose not only the vulnerability of urban communities but also the neglect and overexploitation of the natural systems that sustain us and protect cities. As flames consumed forests, homes and infrastructure in Los Angeles in early 2025 (destroying 16,000 buildings, with thousands more facing continued risk), the controversies around fire prevention and management are likely to burn through political opportunities to build a common vision for a resilient and sustainable future in and around urban areas. Although the Los Angeles fires and political shifts in Washington cast attention on the USA, recent climate emergencies and political transitions to the right or extreme-right internationally call for invoking shared values in the management of the climate crisis and the protection of natural resources.
Read moreThe Importance of (Not Just Visual) Interaction With Nature: A Study With the Girl Scouts
This study investigated whether children’s nature interactions that are embodied (versus only visual) would be associated with a state of being highly aware without thought, including being in “the present moment,” and/or feeling connected to something beyond the self. We refer to this state of being as Presence in nature. Using an interaction pattern approach, we coded written narratives from 127 Girl Scouts (8-11 years old) about a recent meaningful nature experience and, through a questionnaire designed for the study, assessed the degree to which participants experienced Presence in that nature experience. Exploratory analyses indicated that participants who enacted embodied interactions with nature (e.g., “making snowman,” “wrapping arms around tree,” “talking to chickens”) reported a greater sense of Presence in nature than participants whose interactions relied solely on vision (e.g., “seeing snow,” “seeing moss,” “watching pileated woodpecker”). Discussion focuses on the implications of Girl Scouts’ embodied nature interactions for environmental education. Related Media Q&A: UW Researchers Examine Mental Impact of Girl Scouts’ Interactions With Nature (April 21, 2025)
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The Psychological Benefits of Open-Water (Wild) Swimming: Exploring a Self-Determination Approach Using a 19-Country Sample
A growing body of qualitative and quantitative research has explored the potential benefits to mental health and well-being of open-water or “wild” swimming. To date, most studies have used small samples in specific locations, limiting generalisability, and have not distinguished open-water swimming from other forms of outdoor swimming, such as in open-air pools, raising questions about any additional benefits of wild swimming over and above swimming outside per se. Using survey data from n =1,200 recently recalled outdoor swimming visits across 19 different countries, we compared self-reported well-being outcomes for swims in either open-water (wild) locations or open-air pools. Additionally, we explored the degree to which satisfaction of the motivations identified by self-determination theory (i.e. autonomy, relatedness, and competence) may explain any differences. Swimming visits in both locations were associated with high levels of positive, and low levels of negative, well-being, as well as high levels of autonomy, relatedness and competence. Open-water swimming was, nonetheless, associated with significantly higher positive well-being than open-air pool swims, with mediation analysis indicating that feelings of greater autonomy and competence (but not relatedness) primarily accounted for the difference. Results for anxiety were more nuanced, perhaps because more competent swimmers were more likely to swim in less safe, more anxiety inducing, places. Results re-iterate, help explain, and support the generalisation of previous research reporting potential benefits of open-water swimming for mental health and well-being, and highlight the need to support further safe access to high quality open-water locations.
Read moreWhole-Earth: A Conservation-Planning Paradigm for a Changing Climate
Figure 1: Framework for successful biodiversity conservation in the face of climate change. Conservationists have called for conserving 30%–50% of the earth’s surface to address the ongoing biodiversity and climate crises. To be successful, such an expansion of the global reserve network must meet climate-intensified challenges of species movements, ecological transformations, increasing human needs, and environmental injustices. These challenges will not be overcome by simply doubling or tripling the footprint of protected areas. Instead, successful biodiversity conservation will require planning for conservation mosaics—large, integrated landscapes, and seascapes composed of areas with different levels of protection and types of management—that cover the entire earth. Such mosaics can (1) increase landscape-scale coordination of conservation efforts, (2) increase landscape permeability, (3) sustain healthy human populations, and (4) reduce environmental injustices. We describe this more holistic spatial conservation paradigm and provide a framework for planning for conservation mosaics that addresses growing biodiversity conservation and human needs.
Read moreWill Biodiversity Actions Yield Healthy Places? A Systematic Review of Human Health Outcomes Associated With Biodiversity-Focused Urban Greening
Figure 1. Seven biodiversity-supporting elements in urban landscapes and definitions for each. Biodiversity-supporting elements are adapted from Spotswood et al. (2019). There is growing interest in using urban greening projects to support biodiversity. While there are many potential co-benefits, the health outcomes resulting from biodiversity-supporting activities have yet to be synthesized. We conducted a systematic review of health outcomes associated with seven biodiversity-supporting elements, including patch size, connections, matrix quality, habitat diversity, native plants, special resources and vegetation management. We identified 1550 studies linking elements with human health. Results show that many types of biodiversity-supporting elements are associated with a wide range of positive health outcomes. These outcomes included improved physical and mental health, increased physical activity, improved childhood development, social outcomes, and reduced exposure to harms such as sun, heat, and pollution (including light, air and noise). Other biodiversity-supporting elements such as reducing pesticide use, native plants, and habitat diversity were associated with a smaller and more specific range of health outcomes. While most findings showed positive associations between biodiversity-supporting elements and health, many also yielded mixed, neutral, or negative findings. Further, most identified study designs were observational, limiting our ability to uncover causality. We found that studies using a natural experimental design yielded a greater fraction of mixed, neutral, and negative findings compared to observational designs (the majority of studies) and experimental studies (largely short term in nature). These results confirm concerns about the strength of research findings built largely on correlational research designs. We also identify areas of trade-off between biodiversity-supporting elements and human health. These include actions that positively affect health yet negatively impact biodiversity, such as the maintenance of sports fields and trails in parks that can negatively impact habitat and disrupt wildlife behaviour. Biodiversity-supporting elements can also negatively impact some dimensions of human health, including by increasing human–wildlife conflict, disease vectors, allergenic pollen, biogenic volatile organic compounds (BVOCs), through and green gentrification. Our review reveals a large potential for co-benefits for human health to come from biodiversity-focused actions in cities. Careful attention to minimizing tensions and trade-offs could help to reduce the potential for conflict between biodiversity and human health objectives.
Read moreMonitoring Recreation on Federally Managed Lands and Waters—Visitation Estimation
Federally managed public lands and waters attract millions of visitors each year, generating significant economic benefits for surrounding communities. Accurate visitation data are crucial for guiding policy decisions and managing resources effectively. This report explores the methods employed by agencies to collect and use data on recreational visitation to Federal lands and waters. Visitation estimation practices across seven agencies are reviewed, revealing similarities such as the use of automated counters for on-site data collection, alongside differences in reporting frequencies, visit definitions, and public access to data. Emerging technologies, including social media, mobile device activity, and community science, are also evaluated for their potential to improve visitation estimation. Although these technologies offer promising opportunities, they come with challenges such as data biases, the need for calibration, costs, and privacy concerns. The report concludes with opportunities to enhance data collection, coordination, and accessibility, ensuring more efficient resource management and informed decision making. Related Media How Busy are National Parks and other Public Lands? Researchers Hone Methods for Estimating Visitation (June 2025)
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