Nearshore fish community
James A. Hoyle, Michael J. Connerton, Dawn E. Dittman, Dimitry Gorsky, Jana R. Lantry, Alastair Mathers, Scott L. Schlueter, Maureen Walsh, Brian Weidel, Michael J. Yuille
2017, Report, The state of Lake Ontario in 2014
Lake Ontario’s nearshore fish community consists of a diverse assemblage of warm- and cool-water species. The “nearshore zone,” loosely separated from the “offshore zones” by the 15-m depth contour, consists of complex habitats spanning a gamut from vast open-coastal areas to sheltered embayments and wetlands. Lake Ontario’s nearshore habitat has...
A transect through Vermont’s most famous volcano – Mount Ascutney: GSNH Summer 2017 Field Trip
Gregory J. Walsh
2017, Report
No abstract available....
Streamflow alteration and habitat ramifications for a threatened fish species in the Central United States
Kyle E. Juracek, Ken Eng, Daren M. Carlisle, David M. Wolock
2017, River Research and Applications (33) 993-1003
In the Central United States, the Arkansas darter (Etheostoma cragini) is listed as a threatened fish species by the State of Kansas. Survival of the darter is threatened by loss of habitat caused by changing streamflow conditions, in particular flow depletion. Future management of darter populations and habitats requires an...
Seasonality of change: Summer warming rates do not fully represent effects of climate change on lake temperatures
Luke Winslow, Jordan S. Read, Gretchen J. A. Hansen, Kevin C. Rose, Dale M. Robertson
2017, Limnology and Oceanography (62) 2168-2178
Responses in lake temperatures to climate warming have primarily been characterized using seasonal metrics of surface-water temperatures such as summertime or stratified period average temperatures. However, climate warming may not affect water temperatures equally across seasons or depths. We analyzed a long-term dataset (1981–2015) of biweekly water temperature data in...
238U–230Th–226Ra–210Pb–210Po disequilibria constraints on magma generation, ascent, and degassing during the ongoing eruption of Kīlauea
Guillaume Girard, Mark K. Reagan, Kenneth W. W. Sims, Carl Thornber, Christopher L. Waters, Erin H. Phillips
2017, Journal of Petrology (58) 1199-1226
The timescales of magma genesis, ascent, storage and degassing at Kīlauea volcano, Hawai‘i are addressed by measuring 238U-series radionuclide abundances in lava and tephra erupted between 1982 and 2008. Most analyzed samples represent lavas erupted by steady effusion from Pu‘u ‘Ō‘ō and Kūpahianaha from 1983 to 2008. Also included are samples...
Using genetic pedigree reconstruction to estimate effective spawner abundance from redd surveys: an example involving Pacific lamprey (Entosphenus tridentatus)
S.L. Whitlock, L.D. Schultz, Carl B. Schreck, J.E. Hess
2017, Canadian Journal of Fisheries and Aquatic Sciences (74) 1646-1653
Redd surveys are a commonly used technique for indexing the abundance of sexually mature fish in streams; however, substantial effort is often required to link redd counts to actual spawner abundance. In this study, we describe how genetic pedigree reconstruction can be used to estimate effective spawner abundance in a...
Spatial and temporal patterns in golden eagle diets in the western United States, with implications for conservation planning
Geoffrey Bedrosian, James W. Watson, Karen Steenhof, Michael N. Kochert, Charles R. Preston, Brian Woodbridge, Gary E. Williams, Kent R. Keller, Ross H. Crandall
2017, Journal of Raptor Research (51) 347-367
Detailed information on diets and predatory ecology of Golden Eagles (Aquila chrysaetos) is essential to prioritize prey species management and to develop landscape-specific conservation strategies, including mitigation of the effects of energy development across the western United States. We compiled published and unpublished data on Golden Eagle diets to (1)...
Future of Pacific salmon in the face of environmental change: Lessons from one of the world's remaining productive salmon regions
Erik R. Schoen, Mark S. Wipfli, Jamie Trammell, Daniel J. Rinella, Angelica L. Floyd, Jess Grunblatt, Molly D. McCarthy, Benjamin E. Meyer, John M. Morton, James E. Powell, Anupma Prakash, Matthew N. Reimer, Svetlana L. Stuefer, Horacio Toniolo, Brett M. Wells, Frank D. W. Witmer
2017, Fisheries (42) 538-553
Pacific salmon Oncorhynchus spp. face serious challenges from climate and landscape change, particularly in the southern portion of their native range. Conversely, climate warming appears to be allowing salmon to expand northwards into the Arctic. Between these geographic extremes, in the Gulf of Alaska region, salmon are at historically high abundances but...
Spatially dependent responses of a large-river fish assemblage to bank stabilization and side channels
Ann Marie Reinhold, Robert G. Bramblett, Alexander V. Zale, Geoffrey C. Poole, David W. Roberts
2017, Transactions of the American Fisheries Society (146) 967-982
The alteration of rivers by anthropogenic bank stabilization to prevent the erosion of economically valuable lands and structures has become commonplace. However, such alteration has ambiguous consequences for fish assemblages, especially in large rivers. Because most large, temperate rivers have impoundments, it can be difficult to separate the influences of...
Influence of precipitation and crop germination on resource selection by mule deer (Odocoileus hemionus) in southwest Colorado
Emily M. Carrollo, Heather E. Johnson, Justin W. Fischer, Matthew Hammond, Patricia D. Dorsey, Charles Anderson, Kurt C. Vercauteren, W. David Walter
2017, Scientific Reports (7) 1-9
Mule deer (Odocoileus hemionus) populations in the western United States provide many benefits to local economies but can also cause considerable damage to agriculture, particularly damage to lucrative crops. Limited information exists to understand resource selection of mule deer in response to annual variation in crop rotation and climatic conditions....
Unraveling the channel–lobe transition zone with high-resolution AUV bathymetry: Navy Fan, offshore Baja California, Mexico
Cristian Carvajal, Charles K. Paull, David W. Caress, Andrea Fildani, Eve M. Lundsten, Krystle Anderson, Katherine L. Maier, Mary McGann, Roberto Gwiazda, Juan Carlos Herguera
2017, Journal of Sedimentary Research (87) 1049-1059
Ultra-high-resolution (1 m * 1 m * 0.25 m) bathymetry was acquired with an autonomous underwater vehicle (AUV) over a sector of the Navy Fan offshore Baja California. The survey specifically targeted an area where the former interpretation of the fan showed a channel–lobe transition; however, the lobe and the...
Groundwater declines are linked to changes in Great Plains stream fish assemblages
Joshuah S. Prekins, Keith B. Gido, Jeffrey A. Falke, Kurt D. Fausch, Harry Crockett, Eric R. Johnson, John Sanderson
2017, Proceedings of the National Academy of Sciences of the United States of America (114) 7373-7378
Groundwater pumping for agriculture is a major driver causing declines of global freshwater ecosystems, yet the ecological consequences for stream fish assemblages are rarely quantified. We combined retrospective (1950–2010) and prospective (2011–2060) modeling approaches within a multiscale framework to predict change in Great Plains stream fish assemblages associated with groundwater...
Uptake and disposition of select pharmaceuticals by bluegill exposed at constant concentrations in a flow-through aquatic exposure system
Jian-Liang Zhao, Edward T. Furlong, Heiko L. Schoenfuss, Dana W. Kolpin, Kyle L. Bird, David J. Feifarek, Eric A. Schwab, Guang-Guo Ying
2017, Environmental Science & Technology (51) 4434-4444
The increasing use of pharmaceuticals has led to their subsequent input into and release from wastewater treatment plants, with corresponding discharge into surface waters that may subsequently exert adverse effects upon aquatic organisms. Although the distribution of pharmaceuticals in surface water has been extensively studied, the details of uptake, internal...
Resilience in ecotoxicology: Toward a multiple equilibrium concept
Mirco Bundschuh, Ralf Schulz, Craig R. Allen, David G. Angeler
2017, Environmental Toxicology and Chemistry (36) 2574-2580
The term resilience describes stress–response patterns across scientific disciplines. In ecology, advances have been made to clearly define resilience based on underlying mechanistic assumptions. Engineering resilience (rebound) is used to describe the ability of organisms to recover from adverse conditions (disturbances), which is termed the rate of recovery. By contrast,...
Challenges and solutions for applying the travel cost demand model to geographically remote visitor destinations: A case study of bear viewing at Katmai National Park and Preserve
Leslie Richardson, Christopher Huber, John B. Loomis
2017, Human Dimensions of Wildlife (22) 550-563
Remote and unique destinations present difficulties when attempting to construct traditional travel cost models to value recreation demand. The biggest limitation comes from the lack of variation in the dependent variable, defined as the number of trips taken over a set time frame. There are various approaches that can be...
Climate impacts on agricultural land use in the USA: the role of socio-economic scenarios
Jianhong E. Mu, Benjamin M. Sleeter, John T. Abatzoglou, John M. Antle
2017, Climatic Change (144) 329-345
We examine the impacts of climate on net returns from crop and livestock production and the resulting impact on land-use change across the contiguous USA. We first estimate an econometric model to project effects of weather fluctuations on crop and livestock net returns and then use a semi-reduced form land-use...
Shifts in an invasive rodent community favoring black rats (Rattus rattus) following restoration of native forest
Aaron B. Shiels, Arthur C. Medeiros, Erica I. von Allmen
2017, Restoration Ecology (25) 759-767
One potential, unintended ecological consequence accompanying forest restoration is a shift in invasive animal populations, potentially impacting conservation targets. Eighteen years after initial restoration (ungulate exclusion, invasive plant control, and out planting native species) at a 4 ha site on Maui, Hawai'i, we compared invasive rodent communities in a restored native...
New insight into the origin of manganese oxide ore deposits in the Appalachian Valley and Ridge of northeastern Tennessee and northern Virginia, USA
Sarah K. Carmichael, Daniel H. Doctor, Crystal G. Wilson, Joshua Feierstein, Ryan J. McAleer
2017, GSA Bulletin (129) 1158-1180
Manganese oxide deposits have long been observed in association with carbonates within the Appalachian Mountains, but their origin has remained enigmatic for well over a century. Ore deposits of Mn oxides from several productive sites located in eastern Tennessee and northern Virginia display morphologies that include botryoidal and branching forms,...
The pathogenesis of clade 2.3.4.4 H5 highly pathogenic avian influenza viruses in Ruddy Duck (Oxyura jamaicensis) and Lesser Scaup (Aythya affinis)
Erica Spackman, Diann J. Prosser, Mary J. Pantin-Jackwood, Alicia Berlin, Christopher B. Stephens
2017, Journal of Wildlife Diseases (53) 832-842
Waterfowl are the natural hosts of avian influenza virus (AIV) and disseminate the virus worldwide through migration. Historically, surveillance and research efforts for AIV in waterfowl have focused on dabbling ducks. The role of diving ducks in AIV ecology has not been well characterized. In this study, we examined the...
Role of a naturally varying flow regime in Everglades restoration
Judson Harvey, Paul R. Wetzel, Thomas E. Lodge, Victor C. Engel, Michael S. Ross
2017, Restoration Ecology (25) S27-S38
The Everglades is a low-gradient floodplain predominantly on organic soil that undergoes seasonally pulsing sheetflow through a network of deepwater sloughs separated by slightly higher elevation ridges. The seasonally pulsing flow permitted the coexistence of ridge and slough vegetation, including the persistence of productive, well-connected sloughs that seasonally concentrated prey...
Are exposure predictions, used for the prioritization of pharmaceuticals in the environment, fit for purpose?
Emily E. Burns, Jane Thomas-Oates, Dana W. Kolpin, Edward T. Furlong, Alistair B.A. Boxall
2017, Environmental Toxicology and Chemistry (36) 2823-2832
Prioritization methodologies are often used for identifying those pharmaceuticals that pose the greatest risk to the natural environment and to focus laboratory testing or environmental monitoring toward pharmaceuticals of greatest concern. Risk-based prioritization approaches, employing models to derive exposure concentrations, are commonly used, but the reliability of these models is...
Geothermal implications of a refined composition-age geologic map for the volcanic terrains of southeast Oregon, northeast California, and southwest Idaho, USA
Erick R. Burns, Marshall W. Gannett, David R. Sherrod, Mackenzie K. Keith, Jennifer A. Curtis, James R. Bartolino, John A. Engott, Benjamin P. Scandella, Michelle A. Stern, Alan L. Flint
2017, Conference Paper, Geothermal Resources Transactions
Sufficient temperatures to generate steam likely exist under most of the dominantly volcanic terrains of southeast Oregon, northeast California, and southeast Idaho, USA, but finding sufficient permeability to allow efficient advective heat exchange is an outstanding challenge. A new thematic interpretation of existing state-level geologic maps provides an updated and...
The lethality of hot water and ozone to aquatic invasive species
Riley Buley
2017, Thesis
The spread of Aquatic Invasive Species (AIS) between the Great Lakes and Mississippi River Basin by way of the Chicago Area Waterway System (CAWS) is a pressing concern to resource managers in the Midwest region. Augmenting this spread are watercrafts traveling through the CAWS locks and dams. AIS are able...
Evaluating spatial and temporal relationships between an earthquake cluster near Entiat, central Washington, and the large December 1872 Entiat earthquake
Thomas M. Brocher, Richard J. Blakely, Brian L. Sherrod
2017, Bulletin of the Seismological Society of America (107) 2380-2393
We investigate spatial and temporal relations between an ongoing and prolific seismicity cluster in central Washington, near Entiat, and the 14 December 1872 Entiat earthquake, the largest historic crustal earthquake in Washington. A fault scarp produced by the 1872 earthquake lies within the Entiat cluster; the locations and areas of...
Evaluating and improving count-based population inference: A case study from 31 years of monitoring Sandhill Cranes
Brian D. Gerber, William L. Kendall
2017, The Condor (119) 191-206
Monitoring animal populations can be difficult. Limited resources often force monitoring programs to rely on unadjusted or smoothed counts as an index of abundance. Smoothing counts is commonly done using a moving-average estimator to dampen sampling variation. These indices are commonly used to inform management decisions, although their reliability is...
