Decadal declines in avian herbivore reproduction: density-dependent nutrition and phenological mismatch in the Arctic
Megan V. Ross, Ray T. Alisaukas, David C. Douglas, Dana K. Kellett
2017, Ecology (98) 1869-1883
A full understanding of population dynamics depends not only on estimation of mechanistic contributions of recruitment and survival, but also knowledge about the ecological processes that drive each of these vital rates. The process of recruitment in particular may be protracted over several years, and can depend on numerous ecological...
Diet composition of age-0 fishes in created habitats of the Lower Missouri River
Trevor A. Starks, James M. Long
2017, The American Midland Naturalist (178) 112-122
Channelization of the Missouri River has greatly reduced the availability of shallow water habitats used by many larval and juvenile fishes and contributed to imperilment of floodplain-dependent biota. Creation of small side channels, or chutes, is being used to restore shallow water habitat and reverse negative environmental effects associated with...
Microbial-sized, carboxylate-modified microspheres as surrogate tracers in a variety of subsurface environments: An overview
Ronald W. Harvey, David W. Metge, Denis R. LeBlanc
2017, Procedia Earth and Planetary Science (17) 372-375
Since 1986, fluorescent carboxylate-modified polystyrene/latex microspheres (FCM) have been co-injected into aquifers along with conservative tracers and viruses, bacteria, and (or) protozoa. Use of FCM has resulted in new information about subsurface transport behaviors of microorganisms in fractured crystalline rock, karst limestone, soils, and granular aquifers. FCM have been used...
Gradients in Catostomid assemblages along a reservoir cascade
Leandro E. Miranda, Kevin R. Keretz, Chelsea R. Gilliland
2017, River Research and Applications (33) 983-990
Serial impoundment of major rivers leads to alterations of natural flow dynamics and disrupts longitudinal connectivity. Catostomid fishes (suckers, family Catostomidae) are typically found in riverine or backwater habitats yet are able to persist in impounded river systems. To the detriment of conservation, there is limited information about distribution of...
Inputs and internal cycling of nitrogen to a causeway influenced, hypersaline lake, Great Salt Lake, Utah, USA
David L. Naftz
2017, Aquatic Geochemistry (23) 199-216
Nitrogen inputs to Great Salt Lake (GSL), located in the western USA, were quantified relative to the resident nitrogen mass in order to better determine numeric nutrient criteria that may be considered at some point in the future. Total dissolved nitrogen inputs from four surface-water sources entering GSL were modeled...
Evaluation of genetic population structure of smallmouth bass in the Susquehanna River basin, Pennsylvania
Megan K. Schall, Meredith L. Bartron, Timothy Wertz, Jonathan M. Niles, Cassidy H. Shaw, Tyler Wagner
2017, North American Journal of Fisheries Management (37) 850-861
The Smallmouth Bass Micropterus dolomieu was introduced into the Susquehanna River basin, Pennsylvania, nearly 150 years ago. Since introduction, it has become an economically and ecologically important species that supports popular recreational fisheries. It is also one of the most abundant top predators in the system. Currently, there is no...
Estimating the number of recreational anglers for a given waterbody
Kevin L. Pope, Larkin A. Powell, Brian S. Harmon, Mark A. Pegg, Christopher J. Chizinski
2017, Fisheries Research (191) 69-75
Knowing how many anglers use a given body of water is paramount for understanding components of a fishery related to angling pressure and harvest, yet no study has attempted to provide an estimate of the population size of anglers for a given waterbody. Here, we use information from creel surveys...
Recent climate extremes associated with the West Pacific Warming Mode
Chris Funk, Andrew Hoell
2017, Book chapter, Climate extremes: Patterns and mechanisms
Here we analyze empirical orthogonal functions (EOFs) of observations and a 30 member ensemble of Community Earth System Model version 1 (CESM1) simulations, and suggest that precipitation declines in the Greater Horn of Africa (GHA) and the northern Middle East/Southwestern Asia (NME/SWE: Iran, Iraq, Kuwait, Syria, Saudi Arabia north of...
Plant diversity increases with the strength of negative density dependence at the global scale
Joseph A. LaManna, Scott A. Mangan, Alfonso Alonso, Norman Bourg, Warren Y. Brockelman, Sarayudh Bunyavejchewin, Li-Wan Chang, Jyh-Min Chiang, George B. Chuyong, Keith Clay, Richard Condit, Susan Cordell, Stuart J. Davies, Tucker J. Furniss, Christian P. Giardina, I.A.U. Nimal Gunatilleke, C.V. Savitri Gunatilleke, Fangliang He, Robert W. Howe, Stephen P. Hubbell, Chang-Fu Hsieh, Faith M. Inman-Narahari, David Janik, Daniel J. Johnson, David Kenfack, Lisa Korte, Kamil Kral, Andrew J. Larson, James A. Lutz, Sean M. McMahon, William J. McShea, Herve R. Memiaghe, Anuttara Nathalang, Vojtech Novotny, Perry S. Ong, David A. Orwig, Rebecca Ostertag, Geoffrey G. Parker, Richard P. Phillips, Lawren Sack, I-Fang Sun, J. Sebastian Tello, Duncan W. Thomas, Benjamin L. Turner, Dilys M. Vela Diaz, Tomas Vrska, George D. Weiblen, Amy Wolf, Sandra Yap, Jonathan A. Myers
2017, Science (356) 1389-1392
Theory predicts that higher biodiversity in the tropics is maintained by specialized interactions among plants and their natural enemies that result in conspecific negative density dependence (CNDD). By using more than 3000 species and nearly 2.4 million trees across 24 forest plots worldwide, we show that global patterns in tree...
Comparison of American Fisheries Society (AFS) standard fish sampling techniques and environmental DNA for characterizing fish communities in a large reservoir
Christina R. Perez, Scott A. Bonar, Jon J. Amberg, Bridget Ladell, Christopher B. Rees, William T. Stewart, Curtis J. Gill, Chris Cantrell, Anthony Robinson
2017, North American Journal of Fisheries Management (37) 1010-1027
Recently, methods involving examination of environmental DNA (eDNA) have shown promise for characterizing fish species presence and distribution in waterbodies. We evaluated the use of eDNA for standard fish monitoring surveys in a large reservoir. Specifically, we compared the presence, relative abundance, biomass, and relative percent composition of Largemouth Bass Micropterus...
Species’ traits help predict small mammal responses to habitat homogenization by an invasive grass
Joseph P. Ceradini, Anna D. Chalfoun
2017, Ecological Applications (27) 1451-1465
Invasive plants can negatively affect native species, however, the strength, direction, and shape of responses may vary depending on the type of habitat alteration and the natural history of native species. To prioritize conservation of vulnerable species, it is therefore critical to effectively predict species’ responses to invasive plants, which...
Real-time geomagnetic monitoring for space weather-related applications: Opportunities and challenges
Jeffrey J. Love, Carol Finn
2017, Space Weather (15) 820-827
An examination is made of opportunities and challenges for enhancing global, real-time geomagnetic monitoring that would be beneficial for a variety of operational projects. This enhancement in geomagnetic monitoring can be attained by expanding the geographic distribution of magnetometer stations, improving the quality of magnetometer data, increasing acquisition sampling rates,...
Novel, continuous monitoring of fine‐scale movement using fixed‐position radiotelemetry arrays and random forest location fingerprinting
Andrew B. Harbicht, Theodore R. Castro-Santos, William R. Ardren, Dimitry Gorsky, Dylan Fraser
2017, Methods in Ecology and Evolution (8) 850-859
Radio‐tag signals from fixed‐position antennas are most often used to indicate presence or absence of individuals, or to estimate individual activity levels from signal strength variation within an antenna's detection zone. The potential of such systems to provide more precise information on tag location and movement has not been...
Population dynamics of brown trout (Salmo trutta) in Spruce Creek Pennsylvania: A quarter-century perspective
Gary D. Grossman, Robert F. Carline, Tyler Wagner
2017, Freshwater Biology (62) 1143-1154
We examined the relationship between density-independent and density-dependent factors on the demography of a dense, relatively unexploited population of brown trout in Spruce Creek Pennsylvania between 1985 and 2011.Individual PCAs of flow and temperature data elucidated groups of years with multiple high flow versus multiple low flow...
Life history migrations of adult Yellowstone Cutthroat Trout in the upper Yellowstone River
Brian D. Ertel, Thomas E. McMahon, Todd M. Koel, Robert E. Gresswell, Jason Burckhardt
2017, North American Journal of Fisheries Management (37) 743-755
Knowledge of salmonid life history types at the watershed scale is increasingly recognized as a cornerstone for effective management. In this study, we used radiotelemetry to characterize the life history movements of Yellowstone Cutthroat Trout Oncorhynchus clarkii bouvieri in the upper Yellowstone River, an extensive tributary that composes nearly half of the...
An “EAR” on environmental surveillance and monitoring: A case study on the use of Exposure–Activity Ratios (EARs) to prioritize sites, chemicals, and bioactivities of concern in Great Lakes waters
Brett R. Blackwell, Gerald T. Ankley, Steven R. Corsi, Laura A. DeCicco, Kieth A. Houck, Richard S. Judson, Shibin Li, Matthew T. Martin, Elizabeth Murphy, Anthony L. Schroeder, Edwin R. Smith, Joe Swintek, Daniel L. Villeneuve
2017, Environmental Science & Technology (51) 8713-8724
Current environmental monitoring approaches focus primarily on chemical occurrence. However, based on concentration alone, it can be difficult to identify which compounds may be of toxicological concern and should be prioritized for further monitoring, in-depth testing, or management. This can be problematic because toxicological characterization is lacking for many emerging...
Use of spatial capture–recapture to estimate density of Andean bears in northern Ecuador
Santiago Molina, Angela K. Fuller, Dana J. Morin, J. Andrew Royle
2017, Ursus (28) 117-126
The Andean bear (Tremarctos ornatus) is the only extant species of bear in South America and is considered threatened across its range and endangered in Ecuador. Habitat loss and fragmentation is considered a critical threat to the species, and there is a lack of knowledge regarding its distribution and abundance....
10Be dating of late Pleistocene megafloods and Cordilleran Ice Sheet retreat in the northwestern United States
Andrea M. Balbas, Aaron M. Barth, Peter U. Clark, Jorie Clark, Marc A. Caffee, Jim E. O'Connor, Victor R. Baker, Kevin Konrad, Bruce Bjornstad
2017, Geology (45) 583-586
During the late Pleistocene, multiple floods from drainage of glacial Lake Missoula further eroded a vast anastomosing network of bedrock channels, coulees, and cataracts, forming the Channeled Scabland of eastern Washington State (United States). However, the timing and exact pathways of these Missoula floods remain poorly constrained, thereby limiting our...
A proposal for amending administrative law to facilitate adaptive management
Robin K. Craig, J.B. Ruhl, Ellie Brown, Byron K. Williams
2017, Environmental Research Letters (12) 1-17
In this article we examine how federal agencies use adaptive management. In order for federal agencies to implement adaptive management more successfully, administrative law must adapt to adaptive management, and we propose changes in administrative law that will help to steer the current process out of a dead end. Adaptive...
Autonomous acoustic recorders reveal complex patterns in avian detection probability
Sarah J. Thompson, Colleen M. Handel, Lance B. McNew
2017, Journal of Wildlife Management (81) 1228-1241
Avian point‐count surveys are typically designed to occur during periods when birds are consistently active and singing, but seasonal and diurnal patterns of detection probability are often not well understood and may vary regionally or between years. We deployed autonomous acoustic recorders to assess how avian availability for detection (i.e.,...
Genetic assessment of the effects of streamscape succession on coho salmon Oncorhynchus kisutch colonization in recently deglaciated streams
Kim T. Scribner, Chad Soiseth, Jeffrey J. McGuire, G. Kevin Sage, Lyman K. Thorsteinson, J. L. Nielsen, E. Knudsen
2017, Journal of Fish Biology (91) 195-218
Measures of genetic diversity within and among populations and historical geomorphological data on stream landscapes were used in model simulations based on approximate Bayesian computation (ABC) to examine hypotheses of the relative importance of stream features (geomorphology and age) associated with colonization events and gene flow for coho salmon Oncorhynchus kisutch breeding...
Microbial survival strategies in ancient permafrost: insights from metagenomics
Rachel Mackelprang, Alexander Burkert, Monica Haw, Tara Mahendrarajah, Christopher H. Conaway, Thomas A. Douglas, Mark P. Waldrop
2017, The ISME Journal (11) 2305-2318
In permafrost (perennially frozen ground) microbes survive oligotrophic conditions, sub-zero temperatures, low water availability and high salinity over millennia. Viable life exists in permafrost tens of thousands of years old but we know little about the metabolic and physiological adaptations to the challenges presented by life in frozen ground over...
Geomorphology of comet 67P/Churyumov–Gerasimenko
Samuel P. D. Birch, Y. Tang, A. G. Hayes, Randolph L. Kirk, D. Bodewitz, H. Campins, Y. Fernandez, R. de Freitas Bart, N. W. Kutsop, H. Sierks, J. M. Soderblom, S. W. Squyres, J.-B. Vincent
2017, Monthly Notices of the Royal Astronomical Society (469) S50-S67
We present a global geomorphological map of comet 67P/Churyumov–Gerasimenko (67P/C-G) using data acquired by the Rosetta Orbiter’s OSIRIS Narrow Angle Camera. The images used in our study were acquired between 2014 August and 2015 May, before 67P/C-G passed through perihelion. Imagery of the Southern hemisphere was included in our study, allowing us...
Lake nutrient stoichiometry is less predictable than nutrient concentrations at regional and sub-continental scales
Sarah M. Collins, Samantha K. Oliver, Jean-Francois Lapierre, Emily H. Stanley, John R. Jones, Tyler Wagner, Patricia A. Soranno
2017, Ecological Applications (27) 1529-1540
Production in many ecosystems is co-limited by multiple elements. While a known suite of drivers associated with nutrient sources, nutrient transport, and internal processing controls concentrations of phosphorus (P) and nitrogen (N) in lakes, much less is known about whether the drivers of single nutrient concentrations can also explain spatial...
Monitoring land surface albedo and vegetation dynamics using high spatial and temporal resolution synthetic time series from Landsat and the MODIS BRDF/NBAR/albedo product
Zhuosen Wang, Crystal B. Schaaf, Qingson Sun, JiHyun Kim, Angela M. Erb, Feng Gao, Miguel O. Roman, Yun Yang, Shelley Petroy, Jeffrey Taylor, Jeffrey G. Masek, Jeffrey T. Morisette, Xiaoyang Zhang, Shirley A. Papuga
2017, International Journal of Applied Earth Observation and Geoinformation (59) 104-117
Seasonal vegetation phenology can significantly alter surface albedo which in turn affects the global energy balance and the albedo warming/cooling feedbacks that impact climate change. To monitor and quantify the surface dynamics of heterogeneous landscapes, high temporal and spatial resolution synthetic time series of albedo and the enhanced vegetation index...
