Treesearch

Neighborhoods play a central role in health and mental health, particularly during disasters and crises such as the COVID-19 pandemic. We examined changes in psychological distress following the pandemic, and the potential role of neighborhood conditions among 244 residents of New Orleans, Louisiana. Using modified linear regression models, we assessed associations between neighborhood characteristics and change in psychological distress from before to during the pandemic, testing effect modification by sex and social support. While higher density of offsite alcohol outlets (β = 0.89; 95%...

Mesoscale models are a class of atmospheric numerical model designed to simulate atmospheric phenomena with horizontal scales of about 2–200 km, although they are also applied to microscale phenomena with horizontal scales of less than about 2 km. Mesoscale models are capable of simulating wildland fire impacts on atmospheric flows if combustion byproducts (e.g., heat, smoke) are properly represented in the model. One of the primary challenges encountered in applying a mesoscale model to studies of fireperturbed flows is the representation of the fire sensible heat source in the model. Two...

The use of bio-indicators is an emerging, cost-effective alternative approach to identifying air pollution and assessing the need for additional air monitoring. This community science project explores the use of moss samples as bioindicators of the distribution ofmetal air particulates in two residential neighborhoods of the industrial Duwamish Valley located in Seattle,WA(USA).We applied geographically weighted regression to data from 61 youth-collected samples to assess the location-specific area-level spatial predictors of the concentrations of 25 elements with focus on five heavy...

We examined the importance of local habitat features on forest songbird distributions using a feature-dependent group framework that organizes species in relation to variable importance of species-habitat relationships. Habitat features included vegetation structure, floristics, and environmental (i.e., topography) classes. We also examined evidence for hierarchical habitat selection by assessing feature positioning within the ensemble structural models, Random Forests. From the 44 species examined, we distinguished 14 groups, comprising two to eight species per group, and examined...

Cherry plum (Prunus divaricata Ledeb.) is a promising species as a new rootstock for the Prunus genus. In the current study, phenotypic diversity among 43 accessions of this wild species from Hyrcanian forests in Golestan province from Iran was investigated. The selected accessions revealed significant differences in all the measured characteristics. Fruit length ranged from 10.90 to 16.40 mm with an average of 14.30. Ten-fruit weight varied from 5.53 to 33.50 g with an average of 17.70. Leaf length ranged from 19.10 to 44.60 mm with an average of 31.50. Leaf width varied from 8.43 to...

Landscape change occurs as a result of both human and natural forces. When changes are abrupt and drastic, they can negatively impact people who had become attached to a landscape's prior character. Place-based models of landscape change assert that the strength of people's attachments can influence their experience of and response to change. We apply a qualitative deductive-inductive approach to examine rapid change experienced by family forest owners in the northern Great Lakes region of the U.S. (N = 17), whose densely forested property was in the path of a major windstorm and near an...

The IUCN Red List of Ecosystems (RLE) is a global standard for ecosystem risk assessment that integrates data and knowledge to document the relative risk status of ecosystem types as critically endangered (CR), endangered (EN), and vulnerable (VU). A series of indicators for each type gauge the probability of range wide "collapse". Climate change vulnerability can factor into RLE assessments, especially as indicators of climate change severity under the criteria for environmental degradation over the recent and upcoming 50 years. We applied a new framework to assess climate change vulnerabi...

Aim: A full annual cycle approach to conservation and understanding of regional population trends requires an understanding of migratory connectivity. We present tracking data on the eastern whip-poor-will (Antrostomus vociferus), a Neotropical migrant that has declined by 70% in recent decades. When and where populations of this species are limited throughout the annual cycle is poorly understood. Location: Breeding area: midwestern United States; passage area and winter area: midwestern/southern United States, Mexico, Central America. Methods: We utilized data from 52 archival GPS tags...

Effective species conservation requires understanding environmental effects on stage-specific demographics driving population change. Northern Bobwhite (Colinus virginianus) is an early-successional shrub-obligate species that has experienced long-term, range-wide declines due to fire suppression, agricultural intensification, and sprawling development. Local habitat features and landscape context may interactively influence vital rates. Management affects food, cover, and other resources available locally, while surrounding landscapes often determine degree of isolation and predator...

The population dynamics and impacts of non-native species often change following their initial establishment, with impacts either increasing or decreasing over time. The reasons why the abundance of an invading species may change are varied but often reflect changes in the way in which populations interact with resident communities. Here we analyze changes in the outbreak dynamics of Lymantria dispar (formerly known to as the "gypsy moth"), a Eurasian foliage-feeding insect that has been established in N. America for ca. 150 years. We find that during the course of this species' presence...