Treesearch

Following a resource pulse, animals may finance reproduction by consuming concurrently available resources (income breeding) or by storing resources for future reproduction (capital breeding). Understanding how these reproductive strategies are used is important for determining the ecological mechanisms that structure timing of reproduction and that drive interannual population fluctuations in animals. We gathered a reproductive dataset for five small mammal species over a 12-year period in Northeastern USA during which six masting events of American beech (Fagus grandifolia) and eastern...

When comprehensive and accurate data on diversity and representation is available, it significantly enhances our understanding of business challenges, thereby bolstering policy decisions and strategy formulation across all organizational tiers. Using the U.S. forest sector as a case study, we illustrate that there are significant gaps in diversity and representation within the private forest sector, particularly in terms of gender and race. These disparities exist across various domains and categories, including different forest industries, job roles, and business ownership structures. Our...

Ecological forestry experiments typicaly use large treatment units and silvicultural prescriptions that commonly increase within-unit heterogeneity in structural complexity and species composition in large treatment units. Increased heterogeneity influences processes affecting tree responses (e.g., competition) that operate at the neighborhood-level, posing challenges to analysis and interpretation. To investigate whether examining within-unit heterogeneity offers a more meaningful evaluation of project success than comparing categorical treatment effects, we used 20-year data from the...

i-Tree is a suite of computer software tools developed through a collaborative public-private partnership. These tools are designed to assess and value the urban forest resource, understand forest risk, and develop sustainable forest management plans to improve environmental quality and human health. This report provides details about the underlying methods and calculations of these tools, as well their potential limitations. Also discussed are the history of i-Tree, its future goals, and opportunities to facilitate new science and international collaboration.This report is a revision to...

A 2017 analysis of the urban forest in San Diego, California, reveals that this area has an estimated 4.9 million live trees across all ownerships. The most common tree species by number are Chinese banyan, arroyo willow, Japanese cheesewood, Aleppo pine, and pygmy date palm. Trees in San Diego are estimated to store about 289,000 tons of carbon (1.1 million tons of carbon dioxide [CO2]) valued at $49.3 million. In addition, it is estimated that these trees remove about 34,600 tons of carbon per year (or 127,000 tons CO2 per year, valued at $5.9 million per year, an amount roughly equivalen...

A primary prediction of climate change ecology is that species will track their climate niche poleward and upslope. However, studies have shown species responding in surprising ways. In this study, we aim to understand the impact of global change on species ranges by considering both climate and habitat changes. Using occupancy analysis of acoustic survey data in the mountains of the northeastern United States, we tested specific predictions of range responses to warming (shifting upslope), precipitation change (shifting downslope), and forest composition change (shifting downslope). We...

Acquiring data on rare and threatened species can be challenging, particularly in remote areas. Environmental DNA (eDNA) offers a less effort-intensive method for detecting species compared to physical fish sampling methods. In our study, we focused on the Endangered Yaqui catfish Ictalurus pricei, a freshwater fish endemic to the Sonoran desert in Arizona, USA, and Sonora, Mexico, and the non-native channel catfish I. punctatus. We developed and employed mitochondrial eDNA markers to sample 35 locations in the Yaqui River basin in Mexico and employed a hier ar chi cal Bayesian formulation...

Surveys were conducted from January 9, 2023, to April 29, 2023, at eight sampling sites within Everglades National Park: Long Pine Key, Flamingo Marina, Gulf Coast Visitor Center area, Caribbean Club, 9 Mile Pond, Hells Bay, Coot Bay, and Coastal Prairie. Samplers included University of Montana staff, Forest Service staff from the Aldo Leopold Wilderness Research Institute, Denver Service Center staff, and Everglades National Park volunteers. Samplers would ask the visitor if they would be willing to answer the survey in-person or later using a QR code or an email link; responses recorded...

The National Woodland Owner Survey (NWOS) is conducted by the U.S. Department of Agriculture Forest Service, Forest Inventory and Analysis program, to collect information on the attitudes, behaviors, and other characteristics of America's private forest ownerships. This report provides documentation and results from the 2017 to 2018 iteration of the NWOS, which is referenced by the terminal year, 2018. The term "corporate ownerships" collectively refers to large corporate ownerships, which are companies owning 45,000+ acres of forest land, and small corporate ownerships, which include...

An analysis of the urban forest in the city and extraterritorial jurisdiction (ETJ) of San Antonio, TX revealed that this area had an estimated 137.8 million live trees across all ownerships. The most common tree species were Ashe juniper (Juniperus ashei), Texas persimmon (Diospyros texana), mescal bean (Sophora secundiflora), sugarberry (Celtis laevigata), and honey mesquite (Prosopis glandulosa). Trees in San Antonio were estimated to store about 3.5 million tons of carbon (12.8 million tons of carbon dioxide [CO2]), valued at $594.4 million. In addition, these trees were estimated to...