Is motivation important to brook trout passage through culverts?
Elsa Goerig, Theodore R. Castro-Santos
2017, Canadian Journal of Fisheries and Aquatic Sciences (74) 885-893
Culverts can restrict movement of stream-dwelling fish. Motivation to enter and ascend these structures is an essential precursor for successful passage. However, motivation is challenging to quantify. Here, we use attempt rate to assess motivation of 447 brook trout (Salvelinus fontinalis) entering three culverts under a range of hydraulic, environmental,...
A multistate dynamic site occupancy model for spatially aggregated sessile communities
Keiichi Fukaya, J. Andrew Royle, Takehiro Okuda, Masahiro Nakaoka, Takashi Noda
2017, Methods in Ecology and Evolution (8) 757-767
Estimation of transition probabilities of sessile communities seems easy in principle but may still be difficult in practice because resampling error (i.e. a failure to resample exactly the same location at fixed points) may cause significant estimation bias. Previous studies have developed novel analytical methods to correct...
Songbirds are resilient to hurricane disturbed habitats during spring migration
Emily Lain, Theodore J. Zenzal Jr., Frank R. Moore, Wylie C. Barrow Jr., Robert H. Diehl
2017, Journal of Avian Biology (48) 815-826
The Gulf of Mexico is a conspicuous feature of the Neotropical–Nearctic bird migration system. Traveling long distances across ecological barriers comes with considerable risks, and mortality associated with intercontinental migration may be substantial, including that caused by storms or other adverse weather events. However, little, if anything, is known about...
Global synthesis of the documented and projected effects of climate change on inland fishes
Bonnie Myers, Abigail Lynch, David B. Bunnell, Cindy Chu, Jeffrey A. Falke, Ryan Kovach, Trevor J. Krabbenhoft, Thomas J. Kwak, Craig P. Paukert
2017, Reviews in Fish Biology and Fisheries (27) 339-361
Although climate change is an important factor affecting inland fishes globally, a comprehensive review of how climate change has impacted and will continue to impact inland fishes worldwide does not currently exist. We conducted an extensive, systematic primary literature review to identify English-language, peer-reviewed journal publications with projected and documented...
Evaluating species-specific changes in hydrologic regimes: an iterative approach for salmonids in the Greater Yellowstone Area (USA)
Robert K. Al-Chokhachy, Adam J. Sepulveda, Andrew M. Ray, David P. Thoma, Michael T. Tercek
2017, Reviews in Fish Biology and Fisheries (27) 425-441
Despite the importance of hydrologic regimes to the phenology, demography, and abundance of fishes such as salmonids, there have been surprisingly few syntheses that holistically assess regional, species-specific trends in hydrologic regimes within a framework of climate change. Here, we consider hydrologic regimes within the Greater Yellowstone Area in the...
Geodetic slip model of the 3 September 2016 Mw 5.8 Pawnee, Oklahoma, earthquake: Evidence for fault‐zone collapse
Frederick Pollitz, Charles W. Wicks Jr., Martin Schoenball, William L. Ellsworth, Mark Murray
2017, Seismological Research Letters (88) 983-993
The 3 September 2016 Mw 5.8 Pawnee earthquake in northern Oklahoma is the largest earthquake ever recorded in Oklahoma. The coseismic deformation was measured with both Interferometric Synthetic Aperture Radar and Global Positioning System (GPS), with measureable signals of order 1 cm and 1 mm, respectively. We derive a coseismic slip model from Sentinel‐1A...
Re-Os systematics and geochemistry of cobaltite (CoAsS) in the Idaho cobalt belt, Belt-Purcell Basin, USA: Evidence for middle Mesoproterozoic sediment-hosted Co-Cu sulfide mineralization with Grenvillian and Cretaceous remobilization
N.J. Saintilan, R.A. Creaser, Arthur A. Bookstrom
2017, Ore Geology Reviews (86) 509-525
We report the first study of the Re-Os systematics of cobaltite (CoAsS) using disseminated grains and massive sulfides from samples of two breccia-type and two stratabound deposits in the Co-Cu-Au Idaho cobalt belt (ICB), Lemhi subbasin to the Belt-Purcell Basin, Idaho, USA. Using a 185Re + 190Os spike solution, magnetic and non-magnetic...
Amphibians, pesticides, and the amphibian chytrid fungus in restored wetlands in agricultural landscapes
Rebecca A. Reeves, Clay Pierce, Mark W. Vandever, Erin L. Muths, Kelly L. Smalling
2017, Herpetological Conservation and Biology (12) 68-77
Information on interactions between pesticide exposure and disease prevalence in amphibian populations is limited, especially from field data. Exposure to certain herbicides and insecticides has the potential to decrease the immune response in frogs, which can potentially lead to increased abundance of Batrachochytrium dendrobatidis (Bd) zoospores on individuals and in...
Sediment source fingerprinting as an aid to catchment management: A review of the current state of knowledge and a methodological decision-tree for end-users
A.L Collins, S. Pulley, I.D.L Foster, Allen C. Gellis, P. Porto, A.J. Horowitz
2017, Journal of Environmental Management (194) 86-108
The growing awareness of the environmental significance of fine-grained sediment fluxes through catchment systems continues to underscore the need for reliable information on the principal sources of this material. Source estimates are difficult to obtain using traditional monitoring techniques, but sediment source fingerprinting or tracing procedures, have emerged as a...
Habitat models to predict wetland bird occupancy influenced by scale, anthropogenic disturbance, and imperfect detection
Wesley J. Glisson, Courtney J. Conway, Christopher P. Nadeau, Kathi L. Borgmann
2017, Ecosphere (8) 1-20
Understanding species–habitat relationships for endangered species is critical for their conservation. However, many studies have limited value for conservation because they fail to account for habitat associations at multiple spatial scales, anthropogenic variables, and imperfect detection. We addressed these three limitations by developing models for an endangered wetland bird, Yuma...
Calculation of in situ acoustic sediment attenuation using off-the-shelf horizontal ADCPs in low concentration settings
Dan Haught, Jeremy G. Venditti, Scott Wright
2017, Water Resources Research (53) 5017-5037
The use of “off-the-shelf” acoustic Doppler velocity profilers (ADCPs) to estimate suspended sediment concentration and grain-size in rivers requires robust methods to estimate sound attenuation by suspended sediment. Theoretical estimates of sediment attenuation require a priori knowledge of the concentration and grain-size distribution (GSD), making the method impractical to apply...
Projecting community changes in hazard exposure to support long-term risk reduction: A case study of tsunami hazards in the U.S. Pacific Northwest
Benjamin M. Sleeter, Nathan J. Wood, Christopher E. Soulard, Tamara Wilson
2017, International Journal of Disaster Risk Reduction (22) 10-22
Tsunamis have the potential to cause considerable damage to communities along the U.S. Pacific Northwest coastline. As coastal communities expand over time, the potential societal impact of tsunami inundation changes. To understand how community exposure to tsunami hazards may change in coming decades, we projected future development (i.e. urban, residential,...
Analyzing cloud base at local and regional scales to understand tropical montane cloud forest vulnerability to climate change
Ashley E. Van Beusekom, Grizelle Gonzalez, Martha A. Scholl
2017, Atmospheric Chemistry and Physics (17) 7245-7259
The degree to which cloud immersion provides water in addition to rainfall, suppresses transpiration, and sustains tropical montane cloud forests (TMCFs) during rainless periods is not well understood. Climate and land use changes represent a threat to these forests if cloud base altitude rises as a result of regional warming...
Reexamining ultrafiltration and solute transport in groundwater
Christopher E. Neuzil, Mark Person
2017, Water Resources Research (53) 4922-4941
Geologic ultrafiltration—slowing of solutes with respect to flowing groundwater—poses a conundrum: it is consistently observed experimentally in clay-rich lithologies, but has been difficult to identify in subsurface data. Resolving this could be important for clarifying clay and shale transport properties at large scales as well as interpreting solute and isotope...
Sources and ages of fine-grained sediment to streams using fallout radionuclides in the Midwestern United States
Allen C. Gellis, Christopher C. Fuller, Peter C. Van Metre
2017, Journal of Environmental Management (194) 73-85
Fallout radionuclides, 7Be and 210Pbex, sampled in bed sediment for 99 watersheds in the Midwestern region of the United States and in 15 samples of suspended sediment from 3 of these watersheds were used to partition upland from channel sources and to estimate the age or the time since the surface-derived portion...
Assessment of frequency and duration of point counts when surveying for golden eagle presence
Ben R. Skipper, Clint W. Boal, Jo-Szu Tsai, Mark R. Fuller
2017, Wildlife Society Bulletin (41) 212-223
We assessed the utility of the recommended golden eagle (Aquila chrysaetos) survey methodology in the U.S. Fish and Wildlife Service 2013 Eagle Conservation Plan Guidance. We conducted 800-m radius, 1-hr point-count surveys broken into 20-min segments, during 2 sampling periods in 3 areas within the Intermountain West of the United...
Effects of temperature, total dissolved solids, and total suspended solids on survival and development rate of larval Arkansas River Shiner
Julia S. Mueller, Timothy B. Grabowski, Shannon K. Brewer, Thomas A. Worthington
2017, Journal of Fish and Wildlife Management (8) 79-88
Decreases in the abundance and diversity of stream fishes in the North American Great Plains have been attributed to habitat fragmentation, altered hydrological and temperature regimes, and elevated levels of total dissolved solids and total suspended solids. Pelagic-broadcast spawning cyprinids, such as the Arkansas River Shiner Notropis girardi, may be particularly vulnerable...
Reflected stochastic differential equation models for constrained animal movement
Ephraim M. Hanks, Devin S. Johnson, Mevin Hooten
2017, Journal of Agricultural, Biological, and Environmental Statistics (22) 353-372
Movement for many animal species is constrained in space by barriers such as rivers, shorelines, or impassable cliffs. We develop an approach for modeling animal movement constrained in space by considering a class of constrained stochastic processes, reflected stochastic differential equations. Our approach generalizes existing methods for modeling unconstrained animal...
Alternative foraging strategies enable a mountain ungulate to persist after migration loss
Alyson B. Courtemanch, Matthew J. Kauffman, Steve Kilpatrick, Sarah Dewey
2017, Ecosphere (8) 1-16
The persistence of many migratory ungulate populations worldwide is threatened due to anthropogenic impacts to seasonal ranges and migration routes. While many studies have linked migratory ungulate declines to migration disruption or loss, very few have explored the underlying factors that determine whether a population perishes or persists. In some...
The greenscape shapes surfing of resource waves in a large migratory herbivore
Ellen O. Aikens, Matthew J. Kauffman, Jerod Merkle, Samantha Dwinnell, Gary L. Fralick, Kevin L. Monteith
2017, Ecology Letters (20) 741-750
The Green Wave Hypothesis posits that herbivore migration manifests in response to waves of spring green-up (i.e. green-wave surfing). Nonetheless, empirical support for the Green Wave Hypothesis is mixed, and a framework for understanding variation in surfing is lacking. In a population of migratory mule deer (Odocoileus hemionus), 31% surfed...
Enclosed nests may provide greater thermal than nest predation benefits compared with open nests across latitudes
Thomas E. Martin, Andy J. Boyce, Karolina Fierro-Calderon, Adam E. Mitchell, Connor E. Armstad, James C. Mouton, Evertius E. Bin Soudi
2017, Functional Ecology (31) 1231-1240
Nest structure is thought to provide benefits that have fitness consequences for several taxa. Traditionally, reduced nest predation has been considered the primary benefit underlying evolution of nest structure, whereas thermal benefits have been considered a secondary or even non-existent factor. Yet, the relative roles of these...
A decade of boreal rich fen greenhouse gas fluxes in response to natural and experimental water table variability
David Olefeldt, Eugénie S. Euskirchen, Jennifer W. Harden, Evan S. Kane, A. David McGuire, Mark P. Waldrop, Merritt R. Turetsky
2017, Global Change Biology (23) 2428-2440
Rich fens are common boreal ecosystems with distinct hydrology, biogeochemistry and ecology that influence their carbon (C) balance. We present growing season soil chamber methane emission (FCH4), ecosystem respiration (ER), net ecosystem exchange (NEE) and gross primary production (GPP) fluxes from a 9-years water table manipulation experiment in an Alaskan...
Harvest and group effects on pup survival in a cooperative breeder
David E. Ausband, Michael S. Mitchell, Carisa R. Stansbury, Jennifer L. Stenglein, Lisette P. Waits
2017, Proceedings of the Royal Society B: Biological Sciences (284)
Recruitment in cooperative breeders can be negatively affected by changes in group size and composition. The majority of cooperative breeding studies have not evaluated human harvest; therefore, the effects of recurring annual harvest and group characteristics on survival of young are poorly understood. We evaluated how harvest and groups affect...
The recent warming trend in North Greenland
Anais J. Orsi, Kenji Kawamura, Valerie Masson-Delmotte, Xavier Fettweis, Jason E. Box, Dorthe Dahl-Jensen, Gary D. Clow, Amaelle Landais, Jeffrey P. Severinghaus
2017, Geophysical Research Letters (44) 6235-6243
The Arctic is among the fastest warming regions on Earth, but it is also one with limited spatial coverage of multidecadal instrumental surface air temperature measurements. Consequently, atmospheric reanalyses are relatively unconstrained in this region, resulting in a large spread of estimated 30 year recent warming trends, which limits their use...
Precision and accuracy of age estimates obtained from anal fin spines, dorsal fin spines, and sagittal otoliths for known-age largemouth bass
Zachary B. Klein, Timothy F. Bonvechio, Bryant R. Bowen, Michael C. Quist
2017, Southeastern Naturalist (16) 225-234
Sagittal otoliths are the preferred aging structure for Micropterus spp. (black basses) in North America because of the accurate and precise results produced. Typically, fisheries managers are hesitant to use lethal aging techniques (e.g., otoliths) to age rare species, trophy-size fish, or when sampling in small impoundments where populations are small. Therefore,...
