Point count offsets for estimating population sizes of north American landbirds
B.P.M. Edwards, A.C. Smith, T.D.S. Docherety, M.A. Gahbauer, C.R. Gillespie, A.R. Grinde, T. Harmer, D. Iles, Steven M. Matsuoka, N.L. Michel, N.L. Murray, G. Niemi, J. Pasher, D. Pavlacky, B. Robinson, B. Ryder, P. Solymos, D. Stralberg, E.J. Zlonis
2023, Ibis (165) 482-503
Bird monitoring in North America over several decades has generated many open databases, housing millions of structured and semi-structured bird observations. These provide the opportunity to estimate bird densities and population sizes, once variation in factors such as underlying field methods, timing, land cover, proximity to...
Estimating reproductive and juvenile survival rates when offspring ages are uncertain: A novel multievent mark-resight model with beluga whale case study
Gina K Himes Boor, Tamara L McGuire, Amanda J. Warlick, Rebecca L. Taylor, Sarah J. Converse, John R McClung, Amber D Stephens
2023, Methods in Ecology and Evolution (14) 631-642
Understanding the survival and reproductive rates of a population is critical to determining its long-term dynamics and viability. Mark-resight models are often used to estimate these demographic rates, but estimation of survival and reproductive rates is challenging, especially for wide-ranging, patchily distributed, or cryptic species. In particular, existing mark-resight...
Geochemistry and fluxes of gases from hydrothermal features at Newberry Volcano, Oregon, USA
Jennifer L. Lewicki, William C. Evans, Steven E. Ingebritsen, Laura E. Clor, Peter J. Kelly, Sara Peek, Robert A. Jensen, Andrew G. Hunt
2023, Journal of Volcanology and Geothermal Research (433)
We present the chemical and isotopic compositions of gases and fluxes of CO2 from the hydrothermal features of Newberry Volcano, a large composite volcano located in Oregon's Cascade Range with a summit caldera that hosts two lakes, Paulina and East Lakes. Gas samples were collected from 1982 to 2021 from Paulina...
Assessment of resource potential from mine tailings using geostatistical modeling for compositions: A methodology and application to Katherine Mine site, Arizona, USA
C. Ozgen Karacan, Oktay Erten, Josep Antoni Martin-Fernandez
2023, Journal of Geochemical Exploration (245)
The mining industry, in most cases, targets a specific valuable commodity that is present in small quantities within large volumes of extracted material. After milling and processing, most of the extracted material and the effluents are stored as waste (tailings) in impoundments, such as dams or waste dumps, or...
Hydroclimate and fire paleorecords across the southern Rockies and Colorado Plateau over the common era
Natalie M. Kehrwald, Rebecca Lynn Brice
2023, Conference Paper, Proceedings of the 89th annual western snow conference
The southwestern US has been experiencing a severe drought and increased fire activity over the past two decades, affecting people’s health, homes, and businesses. Many individual fires occurring in the Southwest are the most severe in recorded history both in terms of dollars of damages as well as in fire...
Porosity, strength, and alteration – Towards a new volcano stability assessment tool using VNIR-SWIR reflectance spectroscopy
Gabor Kereszturi, Michael J. Heap, Lauren N. Schaefer, Herlan Darmawan, Frances M. Deegan, Ben M. Kennedy, Jean-Christophe Komorowski, Stuart Mead, Marina Rosas-Carbajal, Amy Ryan, Valentin R. Troll, Marlene C. Villeneuve, Thomas R. Walter
2023, Earth and Planetary Science Letters (602)
Volcano slope stability analysis is a critical component of volcanic hazard assessments and monitoring. However, traditional methods for assessing rock strength require physical samples of rock which may be difficult to obtain or characterize in bulk. Here, visible to shortwave infrared (350–2500 nm; VNIR–SWIR) reflected...
Longitudinal analyses of catch-at-age data for reconstructing year-class strength, with an application to lake trout (Salvelinus namaycush) in the main basin of Lake Huron
Ji X. He, Andrew Edgar Honsey, David F. Staples, James R. Bence, Tracy L. Claramunt
2023, Canadian Journal of Fisheries and Aquatic Sciences (80) 183-194
We investigated using longitudinal models to reconstruct year-class strength (YCS) from catch-at-age data, with an example application to lake trout (Salvelinus namaycush) in the main basin of Lake Huron. The best model structure depended on the age range used for model implementation. The YCS trajectory from the...
Using fiber-optic distributed temperature sensing in fisheries applications: An example from the Ozark Highlands
Skylar L. Wolf, Dusty A. Swedberg, Evan P. Tanner, Samuel D. Fuhlendorf, Shannon K. Brewer
2023, Fisheries Research (258)
Studies of thermal selection by organisms, including fishes, are common and provide data that are useful for conservation and management. Advances in temperature sensing technology have improved these studies; however, the benefits of new technology (e.g., increased accuracy and greater deployment...
Towards a unified drag coefficient formula for quantifying wave energy reduction by salt marshes
Ling Zhu, Q. Chen, Yan Ding, Navid H. Jafari, Hongqing Wang, Bradley D. Johnson
2023, Coastal Engineering (180)
Coastal regions are susceptible to increasing flood risks amid climate change. Coastal wetlands play an important role in mitigating coastal hazards. Vegetation exerts a drag force to the flow and dampens storm surges and wind waves. The prediction of wave attenuation by...
The Far-Field imprint of the late Paleozoic Ice Age, its demise, and the onset of a dust-house climate across the Eastern Shelf of the Midland Basin, Texas
Neil Patrick Griffis, Neil Tabor, Daniel Stockli, Lisa Stockli
2023, Gondwana Research (115) 17-36
The late Paleozoic is a period of pronounced climatic and tectonic change, characterized by the onset and disappearance of continental-scale glaciers across polar Gondwana, the formation of Pangea, and widespread large igneous province volcanism. The low-latitude equatorial tropics are assumed to be places of persistent...
Addressing detection uncertainty in Bombus affinis (Hymenoptera: Apidae) surveys can improve inferences made from monitoring
Clint Otto, Alma Schrage, Larissa L. Bailey, John Michael Mola, Tamara A. Smith, Ian S. Pearse, Stacy C. Simanonok, Ralph Grundel
2023, Environmental Entomology (52) 108-118
The U.S. Fish and Wildlife Service developed national guidelines to track species recovery of the endangered rusty patched bumble bee [Bombus affinis Cresson (Hymenoptera: Apidae)] and to investigate changes in species occupancy across space and time. As with other native bee monitoring efforts, managers have specifically acknowledged the need to address...
Geophysical data provide three dimensional insights into porphyry copper systems in the Silverton caldera, Colorado, USA
Eric D. Anderson, Douglas Yager, Maria Deszcz-Pan, Bennett Eugene Hoogenboom, Brian D. Rodriguez, Bruce Smith
2023, Ore Geology Reviews (152)
The Silverton caldera in southwest Colorado, USA hosts polymetallic veins and pervasively altered rocks indicative of porphyry copper systems. Nearly a kilometer of erosion has exposed multiple levels of the hydrothermal systems from shallow lithocaps down to quartz-sericite-pyrite veins. New airborne electromagnetic and magnetic survey data are integrated with previous...
A near four-decade time series shows the Hawaiian Islands have been browning since the 1980s
Austin Madson, Monica Dimson, Lucas Berio Fortini, Kapua Kawelo, Tamara Tickin, Matt Keir, Chunyu Dong, Zhimin Ma, David W Beilman, Kelly Kay, Jonathan Pando Ocon, Erica Gallerani, Stephanie Pau, Thomas W Gillespie
2023, Environmental Management (71) 965-980
The Hawaiian Islands have been identified as a global biodiversity hotspot. We examine the Normalized Difference Vegetation Index (NDVI) using Climate Data Records products (0.05 × 0.05°) to identify significant differences in NDVI between neutral El Niño-Southern Oscillation years (1984, 2019) and significant long-term changes over the entire...
Accounting for spatial heterogeneity in visual obstruction in line-transect distance sampling of gopher tortoises
Heather E. Gaya, Lora L. Smith, Clinton T. Moore
2023, Journal of Wildlife Management (87)
Line-transect distance sampling (LTDS) surveys are commonly used to estimate abundance of animals or objects. In terrestrial LTDS surveys of gopher tortoise (Gopherus polyphemus) burrows, the presence of ground-level vegetation substantially decreases detection of burrows of all sizes, but no field or analytical methods exist to control for spatially heterogeneous...
Animal tracing with sulfur isotopes: Spatial segregation and climate variability in Africa likely contribute to population trends of a migratory songbird
Vojtech Brlik, Petr Prochazka, Bengt Hansson, Craig A. Stricker, Elizabeth Yohannes, Rebecca L Powell, Michael B. Wunder
2023, Journal of Animal Ecology (92) 1320-1331
Climatic conditions affect animals but range-wide impacts at the population level remain largely unknown, especially in migratory species. However, studying climate–population relationships is still challenging in small migrants due to a lack of efficient and cost-effective geographic tracking method.Spatial distribution patterns of environmental stable isotopes (so called ‘isoscapes’) generally...
A practical guide to understanding and validating complex models using data simulations
Graziella Vittoria DiRenzo, Ephraim Hanks, David A. W. Miller
2023, Methods in Ecology and Evolution (14) 203-217
Biologists routinely fit novel and complex statistical models to push the limits of our understanding. Examples include, but are not limited to, flexible Bayesian approaches (e.g. BUGS, stan), frequentist and likelihood-based approaches (e.g. packages lme4) and machine learning methods.These software and programs afford the user greater control and flexibility...
A review of supervised learning methods for classifying animal behavioural states from environmental features
Silas Bergen, Manuela Huso, Adam E. Duerr, Missy A Braham, Sara Schmuecker, Tricia A. Miller, Todd E. Katzner
2023, Methods in Ecology and Evolution (14) 189-202
Accurately predicting behavioural modes of animals in response to environmental features is important for ecology and conservation. Supervised learning (SL) methods are increasingly common in animal movement ecology for classifying behavioural modes. However, few examples exist of applying SL to classify polytomous animal behaviour from environmental...
Life-cycle model reveals sensitive life stages and evaluates recovery options for a dwindling Pacific salmon population
Neala W. Kendall, Julia R. Unrein, Carol Volk, David Beauchamp, Kurt L. Fresh, Thomas P. Quinn
2023, North American Journal of Fisheries Management (43) 203-230
Population models, using empirical survival rates estimates for different life stages, can help managers explore whether various management options could stabilize a declining population or restore it to former levels of abundance. Here we used two decades of...
An interactive viewer to improve operational aftershock forecasts
Gabrielle Madison Paris, Andrew J. Michael
2023, Seismological Research Letters (94) 473-484
The U.S. Geological Survey (USGS) issues forecasts for aftershocks about 20 minutes after most earthquakes above M 5 in the United States and its territories, and updates these forecasts 75 times during the first year. Most of the forecasts are issued automatically, but some forecasts require manual intervention to maintain accuracy. It...
Habitat associations of riverine fishes among rocky shoals
Anna Y. Baynes, Mary Freeman, S. Kyle McKay, Seth J. Wenger
2023, Ecology of Freshwater Fish (32) 336-347
Understanding species' associations with physical habitat conditions is a fundamental goal of ecology. For organisms that occupy lotic ecosystems, relationships to streamflow are of particular importance, but these associations are unstudied for most species. We tested the predictability of fish–microhabitat relationships in river shoals (shallow, rocky...
High resolution spatiotemporal patterns of flow at the landscape scale in montane non-perennial streams
Romy Sabathier, Michael Bliss Singer, John C Stella, Dar A. Roberts, Kelly K. Caylor, Kristin L. Jaeger, Julian Olden
2023, River Research and Applications (39) 225-240
Intermittent and ephemeral streams in dryland environments support diverse assemblages of aquatic and terrestrial life. Understanding when and where water flows provide insights into the availability of water, its response to external controlling factors, and potential sensitivity to climate change and a host of human activities....
Estrogenic activity response to best management practice implementation in agricultural watersheds in the Chesapeake Bay watershed
Stephanie E. Gordon, Tyler Wagner, Kelly L. Smalling, Olivia H. Devereux
2023, Journal of Environmental Management (326)
Best management practices (BMPs) have been predominantly used throughout the Chesapeake Bay watershed (CBW) to reduce nutrients and sediments entering streams, rivers, and the bay. These practices have been successful in reducing loads entering the estuary and have shown the potential to reduce other...
The effect of scent lures on detection is not equitable among sympatric species
Marlin M. Dart, Lora B. Perkins, Jonathan A. Jenks, Gary Hatfield, Robert Charles Lonsinger
2023, Wildlife Research (50) 190-200
Context: Camera trapping is an effective tool for cost-efficient monitoring of species over large temporal and spatial scales and it is becoming an increasingly popular method for investigating wildlife communities and trophic interactions. However, camera trapping targeting rare and elusive species can be hampered by low detection rates, which can decrease...
Geochemistry of the Cretaceous Mowry Shale in the Wind River Basin, Wyoming
Katherine L. French, Justin E. Birdwell, Paul G. Lillis
2023, GSA Bulletin (135) 1899-1922
The siliceous nature of the Mowry Shale distinguishes it from many of the well-studied organic-rich mudstones of the Cretaceous Western Interior Seaway. Available models of organic enrichment in mudstones rarely incorporate detailed biomarker, bulk organic, inorganic, and mineralogy data. Here, we used these data to evaluate how variations in organic...
Ecologically relevant moisture and temperature metrics for assessing dryland ecosystem dynamics
D. A. Chenoweth, Daniel Rodolphe Schlaepfer, J. C. Chambers, J. L. Brown, A. K. Urza, Brice Hanberry, D. Board, M. Crist, John B. Bradford
2023, Ecohydrology (16)
In drylands, water-limited regions that cover ~40% of the global land surface, ecosystems are primarily controlled by access to soil moisture and exposure to simultaneously hot and dry conditions. Quantifying ecologically relevant environmental metrics is difficult in drylands because the response of vegetation to moisture and...
