Interspecific aggression among parapatric and sympatric songbirds on a tropical elevational gradient
Andy J. Boyce, Thomas E. Martin
2019, Behavioral Ecology (30) 541-547
Interspecific competition is hypothesized to be a strong force that sets species range limits and drives parapatric distributions of closely related species on tropical mountains. Yet, experimental evidence that competition drives spatial segregation of closely related species on elevational gradients is rare. To test whether competition limits elevational ranges...
Age-0 walleye Sander vitreus display length-dependent diet shift to piscivory
C. S. Uphoff, C. W. Schoenebeck, K. D. Koupal, Kevin L. Pope, W. W. Hoback
2019, Journal of Freshwater Ecology (34) 27-36
The ontogenetic diet shift to piscivory can be energetically beneficial for fish growth and allows larger, more energetically profitable prey to be consumed. A shift to piscivory may be easier for longer individuals within a cohort due to larger gape size, and an early shift is likely advantageous, potentially leading...
Changes in the active, dead, and dormant microbial community structure across a Pleistocene permafrost chronosequence
Alexander Burkert, Thomas A. Douglas, Mark Waldrop, Rachel Mackelprang
2019, Applied and Environmental Microbiology (85)
Permafrost hosts a community of microorganisms that survive and reproduce for millennia despite extreme environmental conditions such as water stress, subzero temperatures, high salinity, and low nutrient availability. Many studies focused on permafrost microbial community composition use DNA-based methods such as metagenomic and 16S rRNA gene sequencing. However, these methods...
The 12 November 2017 Mw 7.3 Ezgeleh–Sarpolzahab (Iran) earthquake and active tectonics of the Lurestan arc
Edwin Nissen, Abdolreza Ghods, Ezgi Karasozen, John R. Elliott, Wiliam D. Barnhart, Eric A. Bergman, Gavin P. Hayes, Mohammadreza Jamal-Reyhani, Majid Nemati, Fengzhou Tan, Wathiq Abdulnaby, Harley M. Benz, Mohammad P. Shahvar, Morteza Talebian, Ling Chen
2019, Journal of Geophysical Research: Solid Earth (124) 2124-2152
The 12 November 2017 Mw 7.3 Ezgeleh‐Sarpolzahab earthquake is the largest instrumentally recorded earthquake in the Zagros Simply Folded Belt by a factor of ∼10 in seismic moment. Exploiting local, regional, and teleseismic data and synthetic aperture radar interferometry imagery, we characterize the rupture, its aftershock sequence, background seismicity, and regional tectonics. The mainshock...
The 2018 rift eruption and summit collapse of Kilauea Volcano
Christina A. Neal, Steven Brantley, Loren Antolik, Janet Babb, Matthew K. Burgess, Michael Cappos, Jefferson Chang, Sarah Conway, Liliana G. Desmither, Peter Dotray, Tamar Elias, Pauline Fukunaga, Steven Fuke, Ingrid A. Johanson, Kevan Kamibayashi, James P. Kauahikaua, R. Lopaka Lee, S. Pekalib, Asta Miklius, Brian Shiro, Don Swanson, Patricia A. Nadeau, Michael H. Zoeller, P. Okubo, Carolyn Parcheta, Matthew R. Patrick, William Tollett, Frank A. Trusdell, Edward F. Younger, Emily K. Montgomery-Brown, Kyle R. Anderson, Michael P. Poland, Jessica L. Ball, Joseph A. Bard, Michelle L. Coombs, Hannah R. Dietterich, Christoph Kern, Weston Thelen, Peter Cervelli, Tim R. Orr, Bruce F. Houghton, Cheryl Gansecki, Richard Hazlett, Paul Lundgren, Angela K. Diefenbach, Allan Lerner, Greg Waite, Peter J. Kelly, Laura E. Clor, Cynthia Werner, Katherine Mulliken, Gary B. Fisher, David Damby
2019, Science (363) 367-374
In 2018, Kīlauea Volcano experienced its largest lower East Rift Zone (LERZ) eruption and caldera collapse in at least 200 years. After collapse of the Pu'u 'Ō'ō vent on 30 April, magma propagated downrift. Eruptive fissures opened in the LERZ on 3 May, eventually extending ~6.8 km. A...
The future is now: Amplicon sequencing and sequence capture usher in the conservation genomics era
Mariah Meek, Wesley Larson
2019, Molecular Ecology Resources (19) 795-803
The genomics revolution has initiated a new era of population genetics where genome-wide data are frequently used to understand complex patterns of population structure and selection. However, the application of genomic tools to inform management and conservation has been somewhat rare outside a few well studied...
Effect of permafrost thaw on plant and soil fungal community in the boreal forest: Does fungal community change mediate plant productivity response?
Ursel M.E Schütte, Jeremiah A. Henning, Yuzhen Ye, A. Bowling, James D. Ford, Helene Genet, Mark Waldrop, Merritt R. Turetsky, Jeffrey R. White, James D Bever
2019, Journal of Ecology (107) 1737-1752
Permafrost thaw is leading to rapid shifts in boreal ecosystem function. Permafrost thaw affects soil carbon turnover through changes in soil hydrology, however, the biotic mechanisms regulating plant community response remain elusive. Here, we measured the response of fungal community composition and soil nutrient content in an intact permafrost plateau...
Draft genome sequence of Picocystis strain ML cultivated from Mono Lake, California
Emily N Junkins, Blake W. Stamps, Frank A Corsetti, Ronald S. Oremland, John R. Spear, Bradley S. Stevenson
2019, Conference Paper, Microbiology Resource Announcements
The microscopic alga Picocystis sp. strain ML is responsible for recurrent algal blooms in Mono Lake, CA. This organism was characterized by only very little molecular data, despite its prominence as a primary producer in saline environments. Here, we report the draft genome sequence for Picocystis sp. strain ML based...
Simulating detection-censored movement records for home range analysis planning
L. S. Wszola, V.L. Simonsen, L. Corral, C. J. Chizinski, Joseph J. Fontaine
2019, Article
Home range estimation is an important analytical method; yet best practices for addressing the effects of spatial variation in detection probability on home range estimates remains elusive. We introduce the R package “DiagnoseHR,” simulation tools for assessing how variation in detection probability arising from landscape, animal behavior, and methodological processes...
Beneath the arctic greening: Will soils lose or gain carbon or perhaps a little of both?
Jennifer W. Harden, J.A. O’Donnell, K.A. Heckman, B.N. Sulman, C.D. Koven, C.L. Ping, G.J. Michaelson
2019, SOIL
Ecosystem shifts related to climate change are anticipated for the next decades to centuries based on a number of conceptual and experimentally derived models of plant structure and function. Belowground, the potential responses of soil systems are less well known. We used geochemical steady state models, soil density fractionation, and...
Factors influencing fish mercury concentrations in Iowa rivers
Nathan Mills, Michael J. Weber, Clay Pierce, Darcy Cashatt
2019, Ecotoxicology (29) 229-241
Fish mercury concentrations have received considerable attention due to human health implications. Fish mercury concentrations are variable within and among systems due to a suite of biotic and abiotic influences that vary among regions and are difficult to predict. Understanding factors associated with variability in fish...
Dynamic wildlife occupancy models using automated acoustic monitoring data
Cathleen Balantic, Therese M. Donovan
2019, Ecological Applications (29)
Automated acoustic monitoring of wildlife has been used to characterize populations of sound-producing species across large spatial scales. However, false negatives and false positives produced by automated detection systems can compromise the utility of these data for researchers and land managers, particularly for research programs endeavoring to describe colonization and...
Estimating river discharge with swath altimetry: A proof of concept using AirSWOT observations
Stephen Tuozzolo, Greg D. Lind, Brandon Overstreet, Joseph F. Mangano, Mark A Fonstad, M. Hagemann, R.P.M. Frasson, K Larnier, P.-A. Garambois, J. Monnier, M. Durand
2019, Geophysical Research Letters (46) 1459-1466
The forthcoming Surface Water and Ocean Topography (SWOT) satellite mission will provide global measurements of the free surface of large rivers, providing new opportunities for remote sensing‐derived estimates of river discharge in gaged and ungaged basins. SWOT discharge algorithms have been developed and benchmarked using synthetic data but remain untested...
Does incorporating gear selectivity during macroscale investigations of fish growth reduce size-selective sampling bias in parameter estimates?
Tyler Wagner, Yan Li
2019, Canadian Journal Fisheries and Aquatic Sciences (76) 2089-2101
Understanding of fish growth, the spatial variability in individual growth, and the potential drivers of such variability is a fundamental component of many ecological investigations. However, sampling gears are always size-selective, and this selectivity can result in biased parameter estimates that can lead to, for example, biased stock assessments that...
Biological and mineralogical controls over cycling of low molecular weight organic compounds along a soil chronosequence
Jack McFarland, Mark P. Waldrop, Daniel Strawn, Courtney Creamer, Corey R. Lawrence, Monica Haw
2019, Soil Biology and Biochemistry (133) 16-27
Low molecular weight organic compounds (LMWOC) represent a small but critical component of soil organic matter (SOM) for microbial growth and metabolism. The fate of these compounds is largely under microbial control, yet outside the cell, intrinsic soil properties can also significantly influence their turnover and retention. Using a chronosequence...
Development of perennial thaw zones in boreal hillslopes enhances potential mobilization of permafrost carbon
Michelle A. Walvoord, Clifford I. Voss, Brian A. Ebel, Burke J. Minsley
2019, Environmental Research Letters (14) 1-11
Permafrost thaw alters subsurface flow in boreal regions that in turn influences the magnitude, seasonality, and chemical composition of streamflow. Prediction of these changes is challenged by incomplete knowledge of timing, flowpath depth, and amount of groundwater discharge to streams in response to thaw. One important phenomenon that may affect...
The influence of depth and velocity on age-0 Scaphirhynchus sturgeon prey consumption: Implications for aquatic habitat restoration
T. R. Gemeinhardt, N. J. C. Gosch, A. P. Civiello, N. Chrisman, H. Shaughnessy, T. L. Brown, James M. Long, J. L. Bonneau
2019, River Research and Applications (35) 205-215
After the pallid sturgeon (Scaphirhynchus albus) was listed as endangered in 1990, a variety of management actions focusing on early life history needs have been implemented to aid species recovery. Given the scarcity of age-0 pallid sturgeon, managers and scientists have relied on sympatric congeners to evaluate the effectiveness of...
Temporal variability in nitrate – discharge relationships in large rivers as revealed by high frequency data
Margaret Zimmer, Brian A. Pellerin, Douglas A. Burns, Gregory Paul Petrochenkov
2019, Water Resources Research (55) 973-989
Little is known about temporal variability in nitrate concentration responses to changes in discharge on intraannual time scales in large rivers. To investigate this knowledge gap, we used a six‐year data set of daily surface water nitrate concentration and discharge averaged from near‐continuous monitoring at U.S. Geological Survey gaging stations...
Temperature–not flow–predicts native fish reproduction with Implications for climate change
Gregory S. Fraser, Kevin R. Bestgen, Dana L. Winkelman, Kevin G. Thompson
2019, Transactions of the American Fisheries Society (148) 509-527
Habitat alterations and introduction of nonnative fishes reduced the distributions of the Flannelmouth Sucker Catostomus latipinnis, Bluehead Sucker C. discobolus, and Roundtail Chub Gila robusta to less than 50% of their historical ranges. Climate change models generally predict decreased streamflows and increased water temperatures that may further affect these species. Understanding the effects of...
Sediment oxygen demand: A review of in situ methods
Erin N. Coenen, Victoria G. Christensen, Lynn Bartsch, Rebecca M. Kreiling, William B. Richardson
2019, Journal of Environmental Quality (48) 403-411
Sediment oxygen demand (SOD) plays a fundamental role in biological and chemical processes within the benthic layer of a water body. Land use, including agricultural land use, can affect SOD. However, a wide variety of approaches have been used for in situ SOD chamber construction and data collection, and modelers...
The 4.2 ka event, ENSO, and coral reef development
Lauren Toth, Richard B. Aronson
2019, Climate of the Past (15) 105-119
Variability of sea-surface temperature related to shifts in the mode of the El Niño–Southern Oscillation (ENSO) has been implicated as a possible forcing mechanism for the global-scale changes in tropical and subtropical precipitation known as the 4.2 ka event. We review records of coral reef development and paleoceanography from the tropical...
Fire legacies in eastern ponderosa pine forests
C. P. Roberts, V. M. Donovan, C. Wonkka, L. Powell, Craig R. Allen, D. G. Angeler, D. Wedin, D. Twidwell
2019, Ecology and Evolution (9) 1869-1879
Disturbance legacies structure communities and ecological memory, but due to increasing changes in disturbance regimes, it is becoming more difficult to characterize disturbance legacies or determine how long they persist. We sought to quantify the characteristics and persistence of material legacies (e.g., biotic residuals of disturbance)...
Absence of PCB hot spot effect in walleye Sander vitreus from lower Green Bay of Lake Michigan
Charles P. Madenjian, Daniel J. Dembkowski, Daniel A. Isermann, Stuart A. Batterman, Sergei C. Chernyak, Stewart F. Cogswell, Mark E. Holey
2019, Archives of Environmental Contamination and Toxicology (76) 442-452
Under certain conditions, polychlorinated biphenyl (PCB) concentration in individuals of one sex of an adult fish population may exceed that of the other sex by more than a factor of two. This phenomenon, known as the PCB hot spot effect, has been postulated to be contingent upon the following...
Forecasting for dry and wet avalanches during mixed rain and snow storm events
Scott Savage, Erich Peitzsch, Simon Trautman, Benjamin VandenBos
2019, The Avalanche Review 30-33
Professionals in coastal and some inland mountain ranges regularly face mixed rain-snow events. Professionals in inland ranges frequently deal with persistent slab avalanches failing on old faceted layers buried deep within the snowpack. What happens when you combine these snowpack and weather events? Widespread avalanching involving faceted layers during mixed...
Reconstructing precipitation in the tropical South Pacific from dinosterol 2H/1H ratios in lake sediment
Ashley E. Maloney, Daniel B. Nelson, Julie N. Richey, Matthew Prebble, David A. Sear, Jonathan D. Hassall, Peter G. Langdon, Ian W. Croudace, Atun Zawadzki, Julian P. Sachs
2019, Geochimica et Cosmochimica Acta (245) 190-206
The South Pacific Convergence Zone (SPCZ) is the Southern Hemisphere’s largest precipitation feature supplying freshwater to 11 million people. Despite its significance, little is known about the location and intensity of SPCZ precipitation prior to instrumental records, hindering attempts to predict precipitation changes in a warming world. Here we use...
