Occupancy patterns in a reintroduced fisher population during reestablishment
Patricia J. Happe, Kurt Jenkins, Rebecca 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...
Inoculation and habitat amelioration efforts in biological soil crust recovery vary by desert and soil texture
Akasha M. Faist, Anita J. Antoninka, Jayne Belnap, Matthew A. Bowker, Michael C. Duniway, Ferran Garcia-Pichel, Corey Nelson, Sasha C. Reed, Ana Giraldo Silva, Sergio Velasco-Ayuso, Nichole N. Barger
2020, Restoration Ecology (28) s96-s105
As dryland degradation continues, it is increasingly important to understand how to effectively restore biocrust communities. Potential techniques include the addition of biocrust inoculum to accelerate biocrust recovery. Enhanced erosion typical of degraded environments creates a challenge for these approaches, due to loss by wind or water and burial by...
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...
Controls on sediment distribution in the coastal zone of the central California transform continental margin, USA
Samuel Y. Johnson, Jeffrey W. Beeson, Janet Watt, Ray Sliter, Antoinette Papesh
2020, Marine Geology (420)
We use >10,000 km of high-resolution seismic-reflection data together with multibeam bathymetry to document complex and highly variable post-Last Glacial Maximum (LGM) sediment distribution and thickness in the coastal zone (~10 m isobath to 5.6 km offshore) along a ~800 km section of central California's transform continental margin. Sediment thickness ranges from 0...
Relaxing segmentation on the Wasatch Fault Zone: Impact on seismic hazard
Alessandro Valentini, Christopher 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...
Multiple conceptualizations of nature are key to inclusivity and legitimacy in global environmental governance
Luca Coscieme, Hakon da Silva Hyldmo, Alvaro Fernandez-Llamazares, Ignacio Palomo, Tuyeni H. Mwampamba, Odirilwe Selomane, Nadia Sitas, Pedro Jaureguiberry, Yasuo Takahashi, Michelle Lim, Maria P. Barral, Juliana S. Farinaci, Julio Diaz-Jose, Sonali Ghosh, Joyce Ojino, Amani Alassaf, Bernard N. Baatuuwie, Lenke Balint, Zeenatul Basher, Fanny Boeraeve, Sugeng Budiharta, R. Chen, Maylis Desrousseaux, Gregory Dowo, Catherine M. Febria, Houda Ghazi, Zuzanna V. Harmackova, R. Jaffe, Mphatso M. Kalemba, Cosmas K. Lambini, Felicia P.S. Lasmana, Assem A. A. Mohammed, Aidin Niamir, Patricio Pliscoff, Rahat Sabyrbekov, Anna A. Sidorovich, Uttam B. Shrestha, Laura Thompson, Mireia Valle
2020, Environmental Science and Policy (104) 36-42
Despite increasing scientific understanding of the global environmental crisis, we struggle to adopt the policies and practices science suggests we should. One of the reasons for this is the general absence of inclusive engagement and dialogue among a wide range of actors with distinct interactions with nature. Furthermore, there is...
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...
Quantifying contributions to tournament catches among resident, stocked, and hybrid black basses (Micropterus spp.)
John S. Hargrove, Mark W. Rogers, Phillip T. Kacmar
2020, Fisheries Management and Ecology (27) 219-226
Millions of Florida bass, Micropterus floridanus Lesueur, are stocked annually into populations of largemouth bass, Micropterus salmoides Lacepède, to increase trophy fish abundance. However, little effort has related the role that resultant hybrids make to angler catches. Largemouth bass were sampled from an important recreational fishery subject to extensive Florida bass stocking to address...
RAD-seq refines previous estimates of genetic structure in Lake Erie walleye
Kuan-Yu Chen, Peter T. Euclide, Stuart A. Ludsin, Wesley Larson, Michael G. Sovic, H. Lisle Gibbs, Elizabeth A. Marschall
2020, Transactions of the American Fisheries Society (149) 159-173
Delineating population structure helps fishery managers to maintain a diverse “portfolio” of local spawning populations (stocks), as well as facilitate stock-specific management. In Lake Erie, commercial and recreational fisheries for Walleye Sander vitreus exploit numerous local spawning populations, which cannot be easily differentiated using traditional genetic data (e.g., microsatellites). Here, we used...
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,...
Holocene rupture history of the central Teton fault at Leigh Lake; Grand Teton National Park, Wyoming
Mark Zellman, Christopher DuRoss, Glenn R. Thackray, Stephen Personius, Nadine G. Reitman, Shannon A. Mahan, Cooper Brossy
2020, Bulletin of the Seismological Society of America (110) 67-82
Prominent scarps on Pinedale glacial surfaces along the eastern base of the Teton Range confirm latest Pleistocene to Holocene surface‐faulting earthquakes on the Teton fault, but the timing of these events is only broadly constrained by a single previous paleoseismic study. We excavated two trenches at the Leigh Lake site...
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...
Gaps and hotspots in the state of knowledge of pinyon-juniper communities
Jessica A. Hartsell, Stella M. Copeland, Seth M. Munson, Bradley J. Butterfield, John B. Bradford
2020, Forest Ecology and Management (455)
Pinyon-juniper (PJ) plant communities cover a large area across North America and provide critical habitat for wildlife, biodiversity and ecosystem functions, and rich cultural resources. These communities occur across a variety of environmental gradients, disturbance regimes, structural conditions and species compositions, including three species of juniper and two species of...
Heat accumulation on coral reefs mitigated by internal waves
Alex S. J. Wyatt, James J. Leichter, Lauren 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 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 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...
Latitudinal variation in snowshoe hare (Lepus americanus) body mass: A test of Bergmann’s Rule
Laura C. Gigliotti, Nathan D. Berg, Rudy Boonstra, Shawn M. Cleveland, Duane R. Diefenbach, Eric M. Gese, Jacob S. Ivan, Knut Kielland, Charles J. Krebs, Alexander V. Kumar, L. Scott Mills, Jonathan N. Pauli, H. Brian Underwood, Evan Wilson, M.J. Sheriff
2020, Canadian Journal of Zoology (98) 88-95
The relationship between body size and latitude have been the focus of dozens of studies across many species. However, results of testing Bergmann’s Rule – that organisms in colder climates or at higher latitudes possess larger body sizes – have been inconsistent across studies. We investigated whether snowshoe hares (Lepus...
Upper thermal tolerance and heat shock protein response of juvenile American shad (Alosa sapidissima)
Shannon Michael Bayse, Ciaran A Shaughnessy, Amy M. Regish, Stephen D. McCormick
2020, Estuaries and Coasts (43) 182-188
Juvenile American shad (Alosa sapidissima) experience a wide range of temperatures in rivers before migrating to the ocean. Temperatures in these freshwater environments can vary greatly spatially, seasonally, year-to-year, and can be impacted by anthropogenic factors such as power plant discharge or climate change. Currently, there is uncertainty concerning juvenile...
A temporally stratified extension of space‐for‐time Cormack–Jolly–Seber for migratory animals
Dalton J. Hance, Russell Perry, John Plumb, Adam 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...
Marking otoliths of Alligator Gar by immersion in oxytetracycline
Richard A. Snow, James M. Long, Michael J. Porta
2020, North American Journal of Fisheries Management (40) 669-674
Alligator Gar Atractosteus spatula are increasingly being stocked to restore populations, making the need to identify stocked individuals important for monitoring. Oxytetracycline (OTC) immersion allows for large numbers of fish to be marked simultaneously, thus eliminating the need to handle fish individually, but protocols for doing so have not been investigated fully...
Development of two quantitative PCR assays for detection of several Cottus species from environmental DNA in Pacific coast watersheds of North America
Marshal Hoy, Carl Ostberg
2020, Conservation Genetics Resources (12) 361-363
We developed two quantitative PCR assays for use with environmental DNA (eDNA) to detect numerous species in the genus Cottus that are indigenous to the Pacific coast watersheds of North America. We conducted in vitro assay validations on ten Cottus species and 32 potentially co-occurring non-Cottus species. We demonstrate the efficacy of these assays by...
Malignant melanoma of Brown Bullhead (Ameiurus nebulosus) in Lake Memphremagog, Vermont/Quebec
Vicki S. Blazer, Cassidy H. Shaw, Cheyenne R. Smith, P Emerson, Thomas R. Jones
2020, Journal of Fish Diseases (43) 91-100
In 2012, brown bullhead (Ameiurus nebulosus) with large, raised, black growths were first reported from multiple areas within the Vermont portion of Lake Memphremagog. Subsequent surveys conducted from 2014 to 2017 at two sites within the lake indicated a prevalence of 30% in adult brown bullhead 200 mm and above total...
Microplastic concentrations in two Oregon bivalve species: Spatial, temporal, and species variability
Britta Baechler, Elise F. Granek, Matthew G. Hunter, Kathleen E. Conn
2020, Limnology and Oceanography Letters (5) 54-65
Microplastics are an ecological stressor with implications for ecosystem and human health when present in seafood. We quantified microplastic types, concentrations, anatomical burdens, geographic distribution, and temporal differences in Pacific oysters (Crassostrea gigas) and Pacific razor clams (Siliqua patula) from 15 Oregon coast, U.S.A. sites. Microplastics were present in organisms...
