D. Rivers results 26
· Newest (Page 1/2, per page 25)
Author: D. Rivers ×Clear All Filters
Search Results
The Hidden Forests Below: A Review of the Ecology and Evolution of Wood Falls on the Deep SeafloorNARA Subscribed
Wood falls—parcels of wood that sink to the deep‐sea floor—represent unique and dynamic ecosystems that support a highly diverse and evolutionarily distinct assemblage of faunal communities. The fauna inhabiting wood falls exhibit a high degree of endemism, with many species using the wood not only as a substrate and habitat but also as a direct or indirect source of organic matter. Xylophagous species play a critical role in...
The deep‐sea benthos often exhibit exceptional biodiversity. The patch‐mosaic hypothesis proposes that this deep‐sea diversity arises from varied microhabitats with prolonged temporal persistence filtering for distinctive communities thereby increasing beta‐diversity. This study investigated environmental, community, and macrofaunal species turnover at four deep‐sea sites (~2000 m) in the northern Gulf of Mexico. Using precise...
Dominance and rarity in tree communities across the globe: Patterns, predictors and threatsNARA Subscribed
Aim Ecological and anthropogenic factors shift the abundances of dominant and rare tree species within local forest communities, thus affecting species composition and ecosystem functioning. To inform forest and conservation management it is important to understand the drivers of dominance and rarity in local tree communities. We answer the following research questions: (1) What are the patterns of dominance and rarity in tree...
Isolating the drivers of the species‐area relationship in experimental habitat islandsNARA Subscribed
Aim Considered one of ecology's laws, the species‐area relationship (SAR) is among the most intensively studied ecological phenomena, yet the mechanisms through which the SAR arises and under what circumstances remain poorly understood. Here, we experimentally test the effects of area alone in the absence of commonly invoked mechanistic drivers of the SAR in both sub‐tidal bay and inter‐tidal marsh habitats. Location Louisiana...
Wood in the deep sea serves as a substantial food source in an otherwise barren environment, forming specialized, endemic, and diverse community assemblages. This biodiversity reliance on a terrestrial source creates a linkage by which anthropogenic impacts on land can alter the deep oceans. Knowledge of the alpha‐ or beta‐diversity of entire wood‐fall communities, and wooden drivers of each would elucidate the terrestrial and...
Fragmentation effects on an endangered species across a gradient from the interior to edge of its rangeNARA Subscribed
Understanding how habitat fragmentation affects individual species is complicated by challenges associated with quantifying species‐specific habitat and spatial variability in fragmentation effects within a species’ range. We aggregated a 29‐year breeding survey data set for the endangered marbled murrelet ( Brachyramphus marmoratus ) from >42,000 forest sites throughout the Pacific Northwest (Oregon, Washington, and northern...
The annual National Conference on Health Disparities (NCHD) was launched in 2000. It unites health professionals, researchers, community leaders, and government officials, and is a catalyzing force in developing policies, research interventions, and programs that address prevention, social determinants, health disparities, and health equity. The NCHD Student Research Forum (SRF) was established in 2011 at the Medical Universit...
Common, low-frequency, rare, and ultra-rare coding variants contribute to COVID-19 severityNARA Subscribed
The combined impact of common and rare exonic variants in COVID-19 host genetics is currently insufficiently understood. Here, common and rare variants from whole-exome sequencing data of about 4000 SARS-CoV-2-positive individuals were used to define an interpretable machine-learning model for predicting COVID-19 severity. First, variants were converted into separate sets of Boolean features, depending on the absence or the pr...
Testing a global standard for quantifying species recovery and assessing conservation impactNARA Subscribed
Recognizing the imperative to evaluate species recovery and conservation impact, in 2012 the International Union for Conservation of Nature (IUCN) called for development of a “Green List of Species” (now the IUCN Green Status of Species). A draft Green Status framework for assessing species’ progress toward recovery, published in 2018, proposed 2 separate but interlinked components: a standardized method (i.e., measurement aga...
Innovative Approaches to Reducing Cancer Health DisparitiesNARA Subscribed
Genetic population structure of Natterer's bats explained by mating at swarming sites and philopatryNARA Subscribed
During autumn ‘swarming’, large numbers of temperate bats chase each other in and around underground sites. Swarming has been proposed to be a mating event, allowing interbreeding between bats from otherwise isolated summer colonies. We studied the population structure of the Natterer's bat ( Myotis nattereri ), a swarming species in northern England, by sampling bats at seven sites in two swarming areas and at 11 summer colon...