Monitoring the status and trends of the Shenandoah salamander in Shenandoah National Park
Evan H. Campbell Grant, Adrianne Brand, John E. B. Wofford
2021, Natural Resource Report NPS/SHEN/NRR-2021/2226
The Shenandoah salamander (Plethodon shenandoah) is a federally endangered salamander whose distribution is restricted to high-elevation habitats in Shenandoah National Park (SHEN). During the ranking of vital signs monitoring priorities for this park, “Federal Threatened and Endangered Species” received the 2nd highest ranking for terrestrial vital signs because of ecological,...
Sea state from single optical images: A methodology to derive wind-generated ocean waves from cameras, drones and satellites
Rafael Almar, Erwin W. J. Bergsma, Patrico A. Catalan, Rodrigo Cienfuegos, Leandro Suarez, Felipe Lucero, Alexandre Nicolae Lerma, Franck Desmazes, Eleonora Perugini, Margaret L. Palmsten, Chris Chickadel
2021, Remote Sensing (13)
Sea state is a key variable in ocean and coastal dynamics. The sea state is either sparsely measured by wave buoys and satellites or modelled over large scales. Only a few attempts have been devoted to sea state measurements covering a large domain; in particular its estimation from optical images. With...
Incomplete bioinformatic filtering and inadequate age and growth analysis lead to an incorrect inference of harvested-induced changes
Wesley Larson, Daniel A. Isermann, Zachary S. Feiner
2021, Evolutionary Applications (14) 278-289
Understanding the evolutionary impacts of harvest on fish populations is important for informing fisheries management and conservation and has become a growing research topic over the last decade. However, the dynamics of fish populations are highly complex, and phenotypes can be influenced by many biotic and abiotic factors. Therefore, it...
Breeding at higher latitude is associated with higher photoperiodic threshold and delayed reproductive development in a songbird
Devraj Singh, S. M. Reed, A. A. Kimmitt, K. A. Alford, Craig A. Stricker, P. D. Polly, Ellen D. Ketterson
2021, Hormones and Behavior (128)
Many seasonally breeding animals exhibit a threshold day length (critical photoperiod; CPP) for gonadal growth, and populations breeding at higher latitudes typically have a higher CPP. Much less is known about latitudinal variation in CPP in migratory population that winter away from their breeding range and must time their...
Sap flow evidence of chilling injury and recovery in mangroves following a spring cold spell
Xiaoxuan Gu, Chen Yang, Hewei Zhao, Naxu Hu, Ken Krauss, Chuanyuan Deng, Luzhen Chen
2021, Trees: Structure and Function (35) 907-917
Mangroves are periodically influenced in negative ways by non-freezing temperatures across their global sub-tropical range. However, physiological and morphological evidence of chilling influences to non-freezing chilling events has not been measured in field settings. In this study, we measured sap flow (Js) during such a chilling (but non-freezing) event in...
Relative influence of antecedent topography and sea-level rise on barrier-island migration
Justin L. Shawler, Daniel J. Ciarletta, Jennifer E. Connell, Bianca Q. Boggs, Jorge Lorenzo-Trueba, Christopher J. Hein
2021, Sedimentology (68) 639-669
The response of barrier islands to sea-level rise is modulated by combinations of coastal processes, eco-geomorphic feedbacks, and structural controls, such as antecedent topography. Interactions among these drivers can lead to complex and non-linear changes in island morphology and transitions between migrational, erosional, or progradational states. This study seeks to...
Evidence for maternal style among adult female dolphins when sharing pectoral fin contacts with their calves
Kathleen M. Dudzinski, Christine Ribic, Heather M. Manitzas-Hill, Teresa T. Bolton
2021, Animal Behavior and Cognition (8) 52-68
Adult bottlenose dolphins share pectoral fin contacts (PFC) to manage their social relationships but less is known about how mothers share PFC with their calves. Using a dataset collected over 16 years, we analyzed how 10 matrilines, including three second generation female dolphins in a maternal role, used PFC with...
Learning augmented methods for matching: Improving invasive species management and urban mobility
Johan Bjorck, Qinru Shi, Carrie Brown-Lima, Jennifer Dean, Angela K. Fuller, Carla Gomes
2021, Conference Paper, Proceedings of the AAAI conference on artificial intelligence
With the success of machine learning, integrating learned models into real-world systems has become a critical chal- lenge. Naively applying predictions to combinatorial opti- mization problems can incur high costs, which has motivated researchers to consider learning augmented algorithms that can make use of faulty or incomplete predictions. Inspired by...
Applications of bistatic radar to volcano topography – A review of 10 years of TanDEM-X
Julia Kubanek, Michael Poland, Juliet Biggs
2021, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing (14) 3282-3302
The TanDEM-X satellite mission has revolutionized DEM generation from spaceborne synthetic aperture radar. In addition to the primary objective of generating a consistent digital elevation model with global coverage and unprecedented accuracy, the mission has acquired time series of topographic data over several volcanoes, providing an excellent opportunity to test...
Seasonal precipitation and soil moisture relationships across forests and woodlands in the southwestern United States
C.R. Koehn, M.D. Petrie, John B. Bradford, M.E. Litvak, S. Strachan
2021, Journal of Geophysical Research Biogeosciences (126)
Precipitation [P: mm] controls forest and woodland dynamics in the southwestern United States (SWUS) by altering soil moisture [θ: mm3 mm−3] availability, but the influence of P on θ is complex, varying across space and time. We evaluated seasonal P and θ relationships at shallow (0‐20 cm) and intermediate (50 cm) soil...
Extrinsically reinforced hybrid speciation within Holarctic ermine (Mustela spp.) produces an insular endemic
Jocelyn P. Colella, Lindsey Frederick, Sandra L. Talbot, Joe Cook
2021, Diversity and Distributions (27) 747-762
AimRefugial isolation during glaciation is an established driver of speciation; however, the opposing role of interglacial population expansion, secondary contact, and gene flow on the diversification process remains less understood. The consequences of glacial cycling on diversity are complex and especially so for archipelago species, which experience...
Time since burning and rainfall characteristics impact post-fire debris flow initiation and magnitude
Luke A. McGuire, Francis K. Rengers, Nina S. Oakley, Jason W. Kean, Dennis M. Staley, Hui Tang, Marian de Orla-Barile, Ann M. Youberg
2021, Environmental Engineering and Geology (27) 43-56
The extreme heat from wildfire alters soil properties and incinerates vegetation, leading to changes in infiltration capacity, ground cover, soil erodibility, and rainfall interception. These changes promote elevated rates of runoff and sediment transport that increase the likelihood of runoff-generated debris flows. Debris flows are...
Modeling estrogenic activity in streams throughout the Potomac and Chesapeake Bay watersheds
Stephanie E. Gordon, Daniel K. Jones, Vicki S. Blazer, Luke R. Iwanowicz, Brianna Williams, Kelly Smalling
2021, Environmental Monitoring and Assessment (193)
Endocrine-disrupting compounds (EDCs), specifically estrogenic endocrine-disrupting compounds, vary in concentration and composition in surface waters under the influence of different landscape sources and landcover gradients. Estrogenic activity in surface waters may lead to adverse effects in aquatic species at both individual and population levels, often observed...
Coexistence of multiple leaf nutrient resorption strategies in a single ecosystem
Chen Hao, Sasha C. Reed, Xiaotao Lü, Kongcao Xiao, Kelin Wang, Dejun Li
2021, Science of the Total Environment (772)
Leaf resorption is critical for considerations of how plants use and recycle nutrients, but fundamental unknowns remain regarding the controls over plant nutrient resorption. Empirical studies suggest at least three basic types of resorption control, including (i) stoichiometric control, (ii) nutrient limitation control, and...
Biological and chemical recovery of acidified Catskill Mountain streams in response to the Clean Air Act Amendments of 1990
Barry P. Baldigo, Scott D. George, Dylan R. Winterhalter, Michael McHale
2021, Atmospheric Environment (249)
Decades of acidic deposition have adversely affected aquatic and terrestrial ecosystems in acid-sensitive watersheds in parts of the eastern United States. The national Acid Rain Program (Title IV of the 1990 Clean Air Act Amendments - CAAA) helped reduce emissions of sulfur dioxide (SO2) and nitrogen oxides (NOx) and resulted...
Nuclear eDNA estimates population allele frequencies and abundance in experimental mesocosms
Kara J. Andres, Suresh Sethi, David M. Lodge, Jose Andres
2021, Molecular Ecology (30) 685-697
Advances in environmental DNA (eDNA) methodologies have led to improvements in the ability to detect species and communities in aquatic environments, yet the majority of studies emphasize biological diversity at the species level by targeting variable sites within the mitochondrial genome. Here, we demonstrate that eDNA approaches also have the...
Foreward: The paleoclimatic and paleobiogeographic significance of the Tjörnes Basin, Northern Iceland
Thomas M. Cronin
2021, Book chapter, Pacific - Atlantic mollusc migration
Since the mid-19th century, geologists and paleontologists have recognized the scientific importance and unique nature of the richly fossiliferous sediments exposed along the Tjörnes Peninsula in Northern Iceland. In the following century and a half, Tjörnes has attracted the attention of an international “who’s who” in Cenozoic paleontology, as...
Home ranges and movements of two diamondback terrapins (Malaclemys terrapin macrospilota) in northwest Florida
Margaret Lamont, Darren Johnson, Daniel J. Catizone
2021, Estuaries and Coasts (44) 1484-1491
The diamondback terrapin (Malaclemys terrapin) is a small estuarine turtle distributed along the Atlantic and Gulf Coasts of the USA that is threatened by drowning in crab pots, road mortality, exploitation in the pet trade, and habitat loss. Little is known about the movement patterns and...
Beware of spatial autocorrelation when applying machine learning algorithms to borehole geophysical logs
Neil Terry, Carole D. Johnson, Frederick Day-Lewis, Beth L. Parker, Lee D. Slater
2021, Groundwater (59) 315-319
Although many of the algorithms now considered to be machine learning algorithms (MLAs) have existed for nearly a century (e.g., Rosenblatt 1958), interest in MLAs has recently increased exponentially for solving data-driven problems across a variety of fields due to the expanded availability of large, complex datasets that may be difficult...
Volcanic seismicity beneath Chuginadak Island, Alaska (Cleveland and Tana volcanoes): Implications for magma dynamics and eruption forecasting
John Power, Diana Roman, John J. Lyons, Matthew M. Haney, Daniel J. Rasmussen, Terry Plank, K. P. Nicolaysen, Pavel Izbekov, C. Werner, A Kaufman
2021, Journal of Volcanology and Geothermal Research (412)
Cleveland and Tana are remote volcanoes located in the central Aleutian volcanic arc on the eastern end of the Islands of Four Mountains (IFM). The persistently active Mount Cleveland volcano, on the western side of Chuginadak Island, is surrounded by several closely spaced Quaternary volcanic centers including Carlisle, Herbert, Kagamil, Tana, and...
Modern Mars' geomorphological activity, driven by wind, frost, and gravity
Serina Diniega, Ali M Bramson, Bonnie J. Buratti, Peter Buhler, Devon M. Burr, Matthew Chojnacki, Susan J. Conway, Colin M. Dundas, Candice J. Hansen, Alfred S. McEwen, Mathieu G.A. Lapotre, Joseph S. Levy, Lauren McKeown, Sylvain Piqueux, Ganna Portyankina, Christy Swann, Timothy N. Titus, Jacob Widmer
2021, Geomorphology (380)
Extensive evidence of landform-scale martian geomorphic changes has been acquired in the last decade, and the number and range of examples of surface activity have increased as more high-resolution imagery has been acquired. Within the present-day Mars climate, wind and frost/ice are the dominant drivers, resulting in large avalanches of...
Evaluation of a satellite-based cyanobacteria bloom detection algorithm using field-measured microcystin data
Sachidananda Mishra, Richard P. Stumpf, Blake Schaeffer, P. Jeremy Werdell, Keith A. Loftin, Andrew Meredith
2021, Science for the Total Environment (774)
Widespread occurrence of cyanobacterial harmful algal blooms (CyanoHABs) and the associated health effects from potential cyanotoxin exposure has led to a need for systematic and frequent screening and monitoring of lakes that are used as recreational and drinking water sources. Remote sensing-based methods are often used for synoptic and frequent...
Evaluating coexistence of fish species with coastal cutthroat trout in low order streams of western Oregon and Washington, USA
Kyle D Martens, Jason B. Dunham
2021, Fishes (6)
When multiple species of fish coexist there are a host of potential ways through which they may interact, yet there is often a strong focus on studies of single species without considering these interactions. For example, many studies of forestry–stream interactions in the Pacific Northwest have focused solely on the...
A new era of debris flow experiments in the Oregon woods
Maciej Krzysztof Obryk, David L. George, Benjamin B. Mirus
2021, Eos Science News
No abstract available....
Estimates of county-level nitrogen and phosphorus from fertilizer and manure from 1950 through 2017 in the conterminous United States
James A. Falcone
2021, Open-File Report 2020-1153
This report and associated dataset provide tabular county-level estimates of kilograms of nitrogen and phosphorus generated from two sources: (a) fertilizer from commercial sources and (b) livestock-based manure, for the period 1950 through 2017 for the conterminous United States. Datasets collected during this time span are for intervals of approximately...
