History and sources of co-occurring pesticides in an abstraction well unravelled by age distributions of depth specific groundwater samples
Rasmus Jakobsen, Klaus Hinsby, Jens Aamand, Peter van der Keur, Jacob Kidmose, Roland Purtschert, Bryant C. Jurgens, Jurgen Sultenfuss, Christian N. Albers
2020, Environmental Science & Technology (54) 158-165
When groundwater-based drinking water supply becomes contaminated, the timing and source of contamination are obvious questions. However, contaminants often have diffuse sources and different contaminants may have different sources even in a single groundwater well, making these questions complicated to answer. Age dating of groundwater has been used to reconstruct...
Interactive range‐limit theory (iRLT): An extension for predicting range shifts
Alexej P. K. Siren, Toni Lyn Morelli
2020, Journal of Animal Ecology (89) 940-954
A central theme of range‐limit theory (RLT) posits that abiotic factors form high‐latitude/altitude limits, whereas biotic interactions create lower limits. This hypothesis, often credited to Charles Darwin, is a pattern widely assumed to occur in nature. However, abiotic factors can impose constraints on both limits and there is scant...
Deposition potential and flow-response dynamics of emergent sandbars in a braided river
Jason S. Alexander, Brandon McElroy, Snehalata Huzurbazar, Caroline M. Elliott, Marissa L. Murr
2020, Water Resources Research (56)
Sandbars are ubiquitous in sandy‐braided rivers throughout the world. In the Great Plains of the United States, recovery and expansion of emergent sandbar habitat (ESH) has been a priority in lowland rivers where the natural extent of sandbars has been degraded. Recovery efforts are aimed at protection of populations of...
Nitrogen budgets of the Long Island Sound estuary
Penny Vlahos, Michael Whitney, Christina Menniti, John R. Mullaney, Jonathan Morrison, Yan Jia
2020, Estuarine, Coastal and Shelf Science (232)
Nitrogen (N) inputs to coastal ecosystems have significant impacts on coastal community structure. In N limited systems, increases in N inputs may lead to excess productivity and hypoxia. Like many temperate estuaries, Long Island Sound (LIS), a major eastern U.S. estuary, is a N limited system which has experienced seasonal...
Agricultural cropland extent and areas of South Asia derived using Landsat satellite 30-m time-series big-data using random forest machine learning algorithms on the Google Earth Engine cloud
Murali Krishna Gumma, Prasad Thenkabail, Pardhasaradhi Teluguntla, Adam Oliphant
2020, GIScience and Remote Sensing (57) 302-322
The South Asia (India, Pakistan, Bangladesh, Nepal, Sri Lanka and Bhutan) has a staggering 900 million people (~43% of the population) who face food insecurity or severe food insecurity as per United Nations, Food and Agriculture Organization’s (FAO) the Food Insecurity Experience Scale (FIES). The existing coarse-resolution (>250-m) cropland maps...
Pleistocene lakes and paleohydrologic environments of the Tecopa basin, California: Constraints on the drainage integration of the Amargosa River
Marith C. Reheis, John Caskey, Jordon Bright, James B. Paces, Shannon A. Mahan, Elmira Wan
2020, GSA Bulletin (132) 1537-1565
The Tecopa basin in eastern California was a terminal basin that episodically held lakes during most of the Quaternary until the basin and its modern stream, the Amargosa River, became tributary to Death Valley. Although long studied for its sedimentology, diagenesis, and paleomagnetism, the basin’s lacustrine and paleoclimate history has...
The ecology of chronic wasting disease in wildlife
Luis E. Escobar, Sandra Pritzkow, Steven N Winter, Daniel A. Grear, Megan S. Kirchgessner, Ernesto Dominguez-Villegas, Gustavo Machado, A Townsend Peterson, Claudio Soto
2020, Biological Reviews (95) 393-408
Prions are misfolded infectious proteins responsible for a group of fatal neurodegenerative diseases termed transmissible spongiform encephalopathy or prion diseases. Chronic Wasting Disease (CWD) is the prion disease with the highest spillover potential, affecting at least seven Cervidae (deer) species. The zoonotic potential of CWD is inconclusive and cannot be...
Nonlinear patterns in mercury bioaccumulation in American alligators are a function of predicted age
A.J. Lawson, Clinton T. Moore, T.R. Rainwater, F.M. Nilsen, P.M. Wilkinson, R.H. Lowers, L.J. Jr Guillett, Katherine W. McFadden, Patrick G.R. Jodice
2020, Science of the Total Environment (707)
Mercury is a widespread, naturally occurring contaminant that biomagnifies in wetlands due to the methylation of this element by sulfate-reducing bacteria. Species that feed at the top <a class="topic-link" title="Learn more about trophic level from...
Ground-motion amplification in Cook Inlet region, Alaska from intermediate-depth earthquakes, including the 2018 MW=7.1 Anchorage earthquake
Morgan P. Moschetti, Eric M. Thompson, John Rekoske, Mike Hearne, Peter M. Powers, Daniel E. McNamara, Carl Tape
2020, Seismological Research Letters (91) 142-152
We measure pseudospectral and peak ground motions from 44 intermediate‐depth Mw≥4.9">Mw≥4.9 earthquakes in the Cook Inlet region of southern Alaska, including those from the 2018 <span id="MathJax-Element-4-Frame"...
The sedimentary record of the 2018 Anchorage Earthquake in Eklutna Lake, Alaska: Calibrating the lacustrine seismograph
Maarten Van Daele, Peter J. Haeussler, Robert C. Witter, Nore Praet, Marc De Batist
2020, Seismological Research Letters (91) 126-141
The 30 November 2018 Mw">MMw">w 7.1 Anchorage earthquake caused modified Mercalli intensities of V¼ to V½ at Eklutna Lake...
Occupancy patterns in a reintroduced fisher population during reestablishment
Patricia J. Happe, Kurt Jenkins, Rebecca M. McCaffery, J. C. Lewis, Kristine Pilgrim, Michael K. Schwartz
2020, Journal of Wildlife Management (84) 344-358
Monitoring population performance in the years following species reintroductions is key to assessing population restoration success and evaluating assumptions made in planning species restoration programs. From 2008–2010 we translocated 90 fishers (Pekania pennanti) from British Columbia, Canada, to Washington's Olympic Peninsula, USA, providing the opportunity to...
Hydrologic resilience from summertime fog and recharge: A case study for coho salmon recovery planning
Alicia A. Torregrosa, Lorraine E. Flint, Alan L. Flint
2020, Journal of the American Water Resources Association (56) 134-160
Fog and low cloud cover (FLCC) and late summer recharge increase stream baseflow and decrease stream temperature during arid Mediterranean climate summers, which benefits salmon especially under climate warming conditions. The potential to discharge cool water to streams during the late summer (hydrologic capacity; HC) furnished by FLCC and recharge...
Could a freshwater fish be at the root of dystrophic crises in a coastal lagoon?
Marco Milardi, Elisa Soana, Duane Chapman, Elisa Anna Fano, Giuseppe Castaldelli
2020, Science of the Total Environment (711)
Eutrophication has a profound impact on ecosystems worldwide. Grass carp Ctenopharyngodon idella, an herbivorous fish, has been introduced to control aquatic plant overgrowth caused by eutrophication, but could have other, potentially detrimental, effects. We used the Po di Volano basin (south of the Po River...
Relaxing segmentation on the Wasatch Fault Zone: Impact on seismic hazard
Alessandro Valentini, Christopher B. DuRoss, Edward H. Field, Ryan D. Gold, Richard W. Briggs, Francesco Visini, Bruno Pace
2020, Bulletin of the Seismological Society of America (110) 83-109
The multisegment Wasatch fault zone is a well-studied normal fault in the western United States that has paleoseismic evidence of recurrent Holocene surface-faulting earthquakes. Along the 270-km-long central part of the fault, four primary structural complexities provide possible along-strike limits to these ruptures and form the basis for models of...
Using integrated population models for insights into monitoring programs: An application using pink-footed geese
Fred Johnson, Guthrie S. Zimmerman, Gitte H. Jensen, Kevin K. Clausen, Morten Frederiksen, Jesper Madsen
2020, Ecological Modelling (415)
Development of integrated population models (IPMs) assume the absence of systematic bias in monitoring programs, yet many potential sources of systematic bias in monitoring data exist (e.g., under-counts of abundance). By integrating multiple sources of data, we can assess whether various sources of monitoring data provide consistent inferences about changes...
Directivity of M 3.1 earthquake near Anza, California and the effect on peak ground motion
Jon Peter B. Fletcher, John Boatwright
2020, Bulletin of the Seismological Society of America (110) 312-318
We show the effect of rupture directivity on peak ground‐motion values for a moderate magnitude event at Anza, California, and neighboring stations at the Imperial Valley. The event was located near Borrego Springs on the west side of the Salton Sea and was well recorded at broadband stations near Anza,...
Estimating population size with imperfect detection using a parametric bootstrap
Lisa Madsen, Daniel Dalthorp, Manuela Huso, Andy Aderman
2020, Environmetrics (31)
We develop a novel method of estimating population size from imperfectly detected counts of individuals and a separate estimate of detection probability. Observed counts are separated into classes within which detection probability is assumed constant. Within a detection class, counts are modeled as a single binomial...
Heat accumulation on coral reefs mitigated by internal waves
Alex S. J. Wyatt, James J. Leichter, Lauren T. Toth, Toshihiro Miyajima, Richard B. Aronson, Toshi Nagata
2020, Nature Geoscience (13) 28-34
Coral reefs are among the most species-rich, productive and economically valuable ecosystems on Earth but increasingly frequent pantropical coral bleaching events are threatening their persistence on a global scale. The 2015–2016 El Niño led to the hottest sea surface temperatures on record and widespread bleaching of shallow-water corals. However, the...
Life history structure of westslope cutthroat trout: Inferences from otolith microchemistry
John W Heckel, Michael C. Quist, Carson J. Watkins, Andrew M. Dux
2020, Fisheries Research (222)
Life history diversity is important for population stability and is dependent on connectivity to habitat that supports all life stages and life history strategies for a species. Westslope Cutthroat Trout Oncorhynchus clarkii lewisi (WCT) exhibit plasticity in life history strategies in response to environmental variability, but fisheries managers have been challenged with...
Post-fire aspen (Populus tremuloides) regeneration varies in response to winter precipitation across a regional climate gradient
Susan K. McIlroy, Douglas J. Shinneman
2020, Forest Ecology and Management (455)
Altered climate and changing fire regimes are synergistically impacting forest communities globally, resulting in deviations from historical norms and creation of novel successional dynamics. These changes are particularly important when considering the stability of a keystone species such as quaking aspen...
Compound effects of water clarity, inflow, wind and climate warming on mountain lake thermal regimes
Kyle R. Christianson, Brett M. Johnson, Mevin Hooten
2020, Aquatic Sciences (82)
Many studies have examined the effects of climate warming on lake stability, but few have addressed environmental changes concomitant with climate change, such as alterations in water clarity and lake inflow. Although air temperature rise is a predominant factor linked to lake thermal characteristics, climate-driven changes at watershed scales can...
A temporally stratified extension of space‐for‐time Cormack–Jolly–Seber for migratory animals
Dalton J. Hance, Russell Perry, John Plumb, Adam C. Pope
2020, Biometrics (76) 900-912
Understanding drivers of temporal variation in demographic parameters is a central goal of mark‐recapture analysis. To estimate the survival of migrating animal populations in migration corridors, space‐for‐time mark–recapture models employ discrete sampling locations in space to monitor marked populations as they move past monitoring sites, rather than the standard practice...
The mineral diversity of Jezero crater: Evidence for possible lacustrine carbonates on Mars
Briony H. N. Horgan, Ryan B. Anderson, G. Dromart, Elena S. Amador, Melissa S. Rice
2020, Icarus (339)
Noachian-aged Jezero crater is the only known location on Mars where clear orbital detections of carbonates are found in close proximity to clear fluvio-lacustrine features indicating the past presence of a paleolake; however, it is unclear whether or not the carbonates in Jezero are related to the lacustrine activity. This...
Seasonal variation in sediment delivery across the bay-marsh interface of an estuarine salt marsh
Jessica R. Lacy, Madeline R. Foster-Martinez, Rachel Allen, Matthew C. Ferner, John C. Callaway
2020, Journal of Geophysical Research C: Oceans (125)
Sediment transport across bay–marsh interfaces depends on wave energy, vegetation, and marsh-edge morphology, and varies over a range of timescales. We investigated these dynamics in a tidal salt marsh with a gently-sloped, vegetated edge adjacent to northern San Francisco Bay. Spartina foliosa (cordgrass) inhabits the lower marsh and Salicornia pacifica...
#EarthquakeAdvisory: Exploring discourse between government officials, news media and social media during the Bombay Beach 2016 Swarm
Sara K. McBride, Andrea L. Llenos, Morgan T. Page, Nicholas van der Elst
2020, Seismological Research Letters (91) 438-451
Communicating probabilities of natural hazards to varied audiences is a notoriously difficult task. Many of these challenges were encountered during the 2016 Bombay Beach, California, swarm of ~100 2≤M≤4.3 earthquakes, which began on 26 September 2016 and lasted for several days. The swarm’s proximity to the...
