Farmland in U.S. Conservation Reserve Program has unique floral composition that promotes bee summer foraging
Gabriela Quinlan, Megan Milbrath, Clint Otto, Rufus Isaacs
2021, Basic and Applied Ecology (56) 358-368
Bee conservation is a topic of global concern, particularly in agroecosystems where their contribution to crop pollination is highly valued. Over a decade ago, bees and other pollinators were made a priority of the Conservation Reserve Program (CRP), a U.S. federal program...
Revisiting the declustering of spatial data with preferential sampling
Ricardo A. Olea
2021, Computers & Geosciences (157)
Preferential sampling is a form of data collection that may significantly distort the histogram and the semivariogram of spatially correlated data. Typical situations are a higher sampling density at high-valued areas favorable for mining, and highly contaminated areas in need of environmental...
Racial, ethnic, and social patterns in the recreation specialization of birdwatchers: An analysis of United States eBird registrants
Jonathan D. Rutter, Ashley A. Dayer, Howard W. Harshaw, Nicholas W. Cole, David C. Fulton, Jennifer N. Duberstein, Andrew H Raedeke, Rudy Schuster
2021, Journal of Outdoor Recreation and Tourism (35)
Although birdwatchers comprise a large and growing proportion of the American public, there is a lack of racial and ethnic diversity in the birdwatching community. Previous research suggests that this homogeneity is self-perpetuating, as ethno-racial minorities are less likely to pursue activities in which no one they know participates. However,...
A conservation-oriented SNP panel for Smallmouth Bass (Micropterus dolomieu), with emphasis on Interior Highlands lineages
James M. Long, A. T. Taylor, V. Buonaccorsi
2021, Conservation Genetics Resources (13) 47-59
The Smallmouth Bass (Micropterus dolomieu; SMB) is a widely distributed black bass species, but the southwestern edge of the species range within the Interior Highlands contains some of the most divergent ecotypes. The Neosho subspecies (M. d. velox) inhabits tributaries of the Arkansas River within the Ozark Mountains and a...
Scale growth rates and scale circulus deposition rates of marine-stage Atlantic salmon Salmo salar raised under semi-natural conditions
Erin Peterson, Timothy F. Sheehan, Joseph D. Zydlewski
2021, Journal of Northwest Atlantic Fishery Science (52) 19-27
Scale circuli yield valuable information about the life history, age, and growth of a fish. However, because circuli formation is influenced by somatic growth, the rate at which circuli are formed and the factors influencing these rates must be taken into account for the given life stage of the study...
White-nose Syndrome and environmental correlates to landscape-scale bat presence
Elaine L. Barr, Alexander Silvis, Mike P. Armstrong, W. Mark Ford
2021, Wildlife Society Bulletin (45) 410-421
Over the past 13 years, White-nose Syndrome (WNS) has caused North American bat population declines and shifted community structure towards species less or unaffected by the disease. Mist-netting, acoustic surveys, and cave count data have been used to document changes in bat presence and activity through...
Migration stopover ecology of Cinnamon Teal in western North America
Desmond Alexander Mackell, Michael L. Casazza, Cory T. Overton, J. Patrick Donnelly, David Olson, Fiona McDuie, Josh T. Ackerman, John M. Eadie
2021, Ecology and Evolution (11) 14056-14069
Identifying migration routes and fall stopover sites of Cinnamon Teal (Spatula cyanoptera septentrionalium) can provide a spatial guide to management and conservation efforts, and address vulnerabilities in wetland networks that support migratory waterbirds. Using high spatiotemporal resolution GPS-GSM transmitters, we analyzed 61 fall migration tracks across western...
Shallow marine ecosystem collapse and recovery during the Paleocene-Eocene Thermal Maximum
Skye Y Tian, Moriaki Yasuhara, Huai-Hsuan M Huang, Fabien L. Condamine, Marci M. Robinson
2021, Global and Planetary Change (207)
The Paleocene-Eocene Thermal Maximum (PETM), the most well-studied transient hyperthermal event in Earth history, is characterized by prominent and dynamic changes in global marine ecosystems. Understanding such biotic responses provides valuable insights into future scenarios in the face of anthropogenic warming....
Saltwater intrusion intensifies coastal permafrost thaw
Julia Guimond, Aaron Mohammad, Michelle A. Walvoord, Victor F. Bense, Barret L. Kurylyk
2021, Geophysical Research Letters (48)
Surface effects of sea-level rise (SLR) in permafrost regions are obvious where increasingly iceless seas erode and inundate coastlines. SLR also drives saltwater intrusion, but subsurface impacts on permafrost-bound coastlines are unseen and unclear due to limited field data and the absence of models that include salinity-dependent...
Episodic nutrient addition affects water column nutrient processing rates in river-to-lake transitional zones
Nolan J.T. Pearce, James H. Larson, Mary Anne Evans, Paul C. Frost, Marguerite A. Xenopoulos
2021, Journal of Geophysical Research: Biogeosciences (126)
Storm-driven nutrient loading from tributaries can fuel eutrophication in nearshore and open water areas of lentic ecosystems. However, nutrient processing in river-to-lake transitional zones can substantially alter the amount and composition of nutrients transported to lakes from upstream surface waters. We measured the removal of nutrients and...
Geochemical and mineralogical properties of Boquillas Shale geochemical reference material ShBOQ-1
Justin E. Birdwell, Stephen A. Wilson
2021, Fact Sheet 2021-3048
The ShBOQ-1 geochemical reference material is relevant to studies of the organic geochemistry and mineralogy of petroleum source rocks containing high concentrations of carbonate minerals and organic sulfur-rich, oil-prone marine organic matter. ShBOQ-1 is geochemically and mineralogically similar to the lower part of the Upper Cretaceous Eagle Ford Shale....
Establishment of baseline cytology metrics in nestling American kestrels (Falco sparverius): Immunomodulatory effects of the flame retardant isopropylated triarylphosphate isomers
Jill Jenkins, Brooke A Baudoin, Darren Johnson, Kim J. Fernie, Heather M. Stapelton, Natalie Karouna-Renier
2021, Environment International (157)
Avian populations must mount effective immune responses upon exposure to environmental stressors such as avian influenza and xenobiotics. Although multiple immune assays have been tested and applied to various avian species, antibody-mediated immune responses in non-model avian species are not commonly reported due to the lack of commercially available species-specific...
Integrating regional and local monitoring data and assessment tools to evaluate habitat conditions and inform river restoration
Francine H. Mejia, Jason M Connor, Phil R Kaufmann, Christian E. Torgersen, Eric K Berntsen, Todd Andersen
2021, Ecological Indicators
RRestoring degraded rivers requires initial assessment of the fluvial landscape to identify stressors and riverine features that can be enhanced. We associated local-scale river habitat data collected using standardized national monitoring tools with modeled regional water temperature and flow data on mid-sized northwest U.S. rivers (30–60 m wide). We grouped these rivers according...
Honey bee (Apis mellifera) colonies benefit from grassland/ pasture while bumble bee (Bombus impatiens) colonies in the same landscapes benefit from non-corn/soybean cropland
Gabriela Quinlan, Megan Milbrath, Clint Otto, Rufus Isaacs
Adam Dolezal, editor(s)
2021, PLoS ONE (16) 1-12
Agriculturally important commercially managed pollinators including honey bees (Apis mellifera L., 1758) and bumble bees (Bombus impatiens Cresson, 1863) rely on the surrounding landscape to fulfill their dietary needs. A previous study in Europe demonstrated that managed honey bee foragers and unmanaged native bumble bee foragers are associated with different land uses....
Development of regression equations for the estimation of the magnitude and frequency of floods at rural, unregulated gaged and ungaged streams in Puerto Rico through water year 2017
Patrick J. Ryan, Anthony J. Gotvald, Cody L. Hazelbaker, Andrea G. Veilleux, Daniel M. Wagner
2021, Scientific Investigations Report 2021-5062
The methods of computation and estimates of the magnitude of flood flows were updated for the 50-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent chance exceedance levels for 91 streamgages on the main island of Puerto Rico by using annual peak-flow data through 2017. Since the previous flood frequency...
Improving ESRI ArcGIS performance of coastal and seafloor analysis with the Python multiprocessing module
Jonathan Andrew Zieg, David G. Zawada
2021, Journal of Coastal Research (37) 1288-1293
Coastal research frequently involves the use of a GIS to analyze large areas for changes in response to major weather events, human action, and other factors. The GIS workflows used to conduct these analyses can be complex and sometimes require multiple days to complete. Long runtimes often exist even on...
Stable isotopes used to infer trophic position of green turtles (Chelonia mydas) from Dry Tortugas National Park, Gulf of Mexico, United States
David Roche, Michael Cherkiss, Brian J. Smith, Derek A. Burkholder, Kristen Hart
2021, Regional Studies in Marine Science (48)
Evaluating resource use patterns for imperiled species is critical for understanding what supports their populations. Here we established stable isotope (δ13">δ13C, δ15">δ15N) values for the endangered green sea turtle (Chelonia mydas) population found...
A comparison of methods for the long-term harness-based attachment of radio-transmitters to juvenile Japanese quail (Coturnix japonica)
Evan J Buck, Jeffery D. Sullivan, Cody M. Kent, Jennifer M. Mullinax, Diann Prosser
2021, Animal Biotelemetry (9)
BackgroundWhile the period from fledging through first breeding for waterbird species such as terns (e.g., genus Sterna, Sternula) is of great interest to researchers and conservationists, this period remains understudied due in large part to the difficulty of marking growing juveniles with radio transmitters that remain attached for...
USGS RAMPS (Restoration Assessment and Monitoring Program for the Southwest) newsletter – Summer 2021 edition
Seth M. Munson, Molly L. McCormick
2021, Newsletter
No abstract available....
Development of a screening tool to examine lake and reservoir susceptibility to eutrophication in selected watersheds of the eastern and southeastern United States
W. Reed Green, Anne B. Hoos, Alan E. Wilson, Elizabeth N. Heal
2021, Scientific Investigations Report 2021-5075
This report describes a new screening tool to examine lake and reservoir susceptibility to eutrophication in selected watersheds of the eastern and southeastern United States using estimated nutrient loading and flushing rates with measures of waterbody morphometry. To that end, the report documents the compiled data and methods (R-script) used...
Integrating observations and models to determine the effect of seasonally frozen ground on hydrologic partitioning in alpine hillslopes in the Colorado Rocky Mountains, USA
David M. Rey, Eve-Lyn S. Hinckley, Michelle A. Walvoord, Kamini Singha
2021, Hydrological Processes (35)
This study integrated spatially distributed field observations and soil thermal models to constrain the impact of frozen ground on snowmelt partitioning and streamflow generation in an alpine catchment within the Niwot Ridge Long-Term Ecological Research site, Colorado, USA. The study area was comprised of...
Tradeoffs in habitat value to maximize natural resource benefits from coastal restoration in a rapidly eroding wetland: Is monitoring land area sufficient?
Tim J. B. Carruthers, Erin P. Kiskaddon, Melissa M. Baustian, Kelly M. Darnell, Leland C. Moss, Carey L. Perry, Camille Stagg
2021, Restoration Ecology (30)
Louisiana contains nearly 40% of estuarine herbaceous wetlands in the contiguous United States, supporting valuable ecosystem services and providing significant economic benefits to the state and the entire United States. However, coastal Louisiana is a hotspot for rapid land loss from factors including hurricanes, land use change, and high subsidence...
Fishing gear performance nearshore is substantiated by spatial analyses
Leandro E. Miranda, Nicky M. Faucheux, Kurt M. Lakin
2021, Reviews in Fish Biology and Fisheries (31) 977-987
We estimated whether the fish assemblages nearshore represented by electrofishing and gillnetting indexed location of reservoirs in a river basin. We expected that location in the basin would reflect a multiplicity of factors that determine fish habitat and fish assemblage composition, and therefore also anticipated a correlation between fish species...
Stratigraphic and structural controls on groundwater salinity variations in the Poso Creek Oil Field, Kern County, California, USA
Michael J. Stephens, David H. Shimabukuro, Will Chang, Janice M. Gillespie, Zack Levinson
2021, Hydrogeology Journal (29) 2803-2820
Groundwater total dissolved solids (TDS) distribution was mapped with a three-dimensional (3D) model, and it was found that TDS variability is largely controlled by stratigraphy and geologic structure. General TDS patterns in the San Joaquin Valley of California (USA) are attributed to predominantly connate water composition...
Shining a light on Laurentian Great Lakes cisco (Coregonus artedi): How ice coverage may impact embryonic development
Tara E. Stewart Merrill, Mark Vinson, Jason D. Stockwell
2021, Journal of Great Lakes Research (47) 1410-1418
Changes in winter conditions, such as decreased ice coverage and duration, have been observed in the Laurentian Great Lakes for more than 20 years. Such changes have been hypothesized to be linked to low Coregonus spp. survival to age-1 as most cisco (Coregonus...
