Mangrove expansion and contraction at a poleward range limit: Climate extremes and land-ocean temperature gradients
Michael J. Osland, Richard H. Day, Courtney T. Hall, Marisa D Brumfield, Jason Dugas, William R. Jones
2017, Ecology (98) 125-137
Within the context of climate change, there is a pressing need to better understand the ecological implications of changes in the frequency and intensity of climate extremes. Along subtropical coasts, less frequent and warmer freeze events are expected to permit freeze-sensitive mangrove forests to expand poleward and displace freeze-tolerant salt...
Virulence and biodegradation potential of dynamic microbial communities associated with decaying Cladophora in Great Lakes
Chan Lan Chun, Julie R. Peller, Dawn Shively, Muruleedhara N. Byappanahalli, Richard L. Whitman, Christopher Staley, Qian Zhang, Satoshi Ishii, Michael J. Sadowsky
2017, Science of the Total Environment (574) 872-880
Cladophora mats that accumulate and decompose along shorelines of the Great Lakes create potential threats to the health of humans and wildlife. The decaying algae create a low oxygen and redox potential environment favoring growth and persistence of anaerobic microbial populations, including Clostridium botulinum, the causal agent of botulism in...
Maternal androgens in avian brood parasites and their hosts: responses to parasitism and competition?
Caldwell Hahn, John C. Wingfield, David M. Fox, Brian G. Walker, Jill E Thomley
2017, General and Comparative Endocrinology (240) 143-152
In the coevolutionary dynamic of avian brood parasites and their hosts, maternal (or transgenerational) effects have rarely been investigated. We examined the potential role of elevated yolk testosterone in eggs of the principal brood parasite in North America, the brown-headed cowbird, and three of its frequent host species. Elevated maternal...
Analysis of local slopes at the InSight landing site on Mars
Robin L. Fergason, Randolph L. Kirk, Glen E. Cushing, Donna M. Galuszka, Matthew P. Golombek, Trent M. Hare, Elpitha Howington-Kraus, Devin M Kipp, Bonnie L. Redding
2017, Space Science Reviews (211) 109-133
To evaluate the topography of the surface within the InSight candidate landing ellipses, we generated Digital Terrain Models (DTMs) at lander scales and those appropriate for entry, descent, and landing simulations, along with orthoimages of both images in each stereopair, and adirectional slope images. These products were used to assess...
Retrospective analysis of the epidemiologic literature, 1990–2015, on wildlife-associated diseases from the Republic of Korea
Jusun Hwang, Kyunglee Lee, Young-Jun Kim, Jonathan M. Sleeman, Hang Lee
2017, Journal of Wildlife Diseases (53) 5-18
To assess the status of research on wildlife diseases in the Republic of Korea (ROK) and to identify trends, knowledge gaps, and directions for future research, we reviewed epidemiologic publications on wildlife-associated diseases in the ROK. We identified a relatively small but rapidly increasing body of literature. The majority of...
Ion-adsorption REEs in regolith of the Liberty Hill pluton, South Carolina, USA: An effect of hydrothermal alteration
Carleton R. Bern, Tiffany Yesavage, Nora K. Foley
2017, Journal of Geochemical Exploration (172) 29-40
Ion-adsorbed rare earth element (REE) deposits supply the majority of world heavy REE production and substantial light REE production, but relatively little is known of their occurrence outside Southeast Asia. We examined the distribution and forms of REEs on a North American pluton located in the highly weathered and slowly...
Migratory delay leads to reduced passage success of Atlantic salmon smolts at a hydroelectric dam
Daniel Nyqvist, L. Greenberg, E. Goerig, O. Calles, E. Bergman, William R. Ardren, Theodore R. Castro-Santos
2017, Ecology of Freshwater Fish (26) 707-718
Passage of fish through hydropower dams is associated with mortality, delay, increased energy expenditure and migratory failure for migrating fish and the need for remedial measures for both upstream and downstream migration is widely recognised. A functional fish passage must ensure safe and timely passage routes that a substantial portion...
Logging impacts on avian species richness and composition differ across latitudes relative to foraging and breeding habitat preferences
Joseph A. LaManna, Thomas E. Martin
2017, Biological Reviews (92) 1657-1674
Understanding the causes underlying changes in species diversity is a fundamental pursuit of ecology. Animal species richness and composition often change with decreased forest structural complexity associated with logging. Yet differences in latitude and forest type may strongly influence how species diversity responds to logging. We performed a meta-analysis of...
Channel-planform evolution in four rivers of Olympic National Park, Washington, U.S.A.: The roles of physical drivers and trophic cascades
Amy E. East, Kurt J. Jenkins, Patricia J. Happe, Jennifer A. Bountry, Timothy J. Beechie, Mark C. Mastin, Joel B. Sankey, Timothy J. Randle
2017, Earth Surface Processes and Landforms (42) 1011-1032
Identifying the relative contributions of physical and ecological processes to channel evolution remains a substantial challenge in fluvial geomorphology. We use a 74-year aerial photographic record of the Hoh, Queets, Quinault, and Elwha Rivers, Olympic National Park, Washington, U.S.A., to investigate whether physical or trophic-cascade-driven ecological factors—excessive elk impacts after...
Incorporating temporal heterogeneity in environmental conditions into a somatic growth model
Maria C. Dzul, Charles B. Yackulic, Josh Korman, Michael D. Yard, Jeffrey D. Muehlbauer
2017, Canadian Journal of Fisheries and Aquatic Sciences (74) 316-326
Evaluating environmental effects on fish growth can be challenging because environmental conditions may vary at relatively fine temporal scales compared to sampling occasions. Here we develop a Bayesian state-space growth model to evaluate effects of monthly environmental data on growth of fish that are observed less frequently (e.g., from mark-recapture...
Selecting focal species as surrogates for imperiled species using relative sensitivities derived from occupancy analysis
Amy Silvano, Craig Guyer, Todd Steury, J. Barry Grand
2017, Ecological Indicators (73) 302-311
Most imperiled species are rare or elusive and difficult to detect, which makes gathering data to estimate their response to habitat restoration a challenge. We used a repeatable, systematic method for selecting focal species using relative sensitivities derived from occupancy analysis. Our objective was to select suites of focal species...
Factors influencing movement of two migratory fishes within the tailrace of a large neotropical dam and their implications for hydropower impacts
F. M. Suzuki, Jason B. Dunham, L. G. M. Silva, C. B. M. Alves, P.S. Pompeu
2017, River Research and Applications (33) 514-523
Fish attempting to move upstream through hydroelectric dams can be trapped and killed in turbines. Understanding fish movement patterns can provide useful insights for how to manage dam operations to minimize fish kill in turbines. We evaluated the movements of two migratory fish (Curimba-Prochilodus argenteus and Mandi-Pimelodus maculatus) using acoustic...
Golden Eagle fatalities and the continental-scale consequences of local wind-energy generation
Todd E. Katzner, David M. Nelson, Melissa A. Braham, Jacqueline M. Doyle, Nadia B. Fernandez, Adam E. Duerr, Peter H. Bloom, Matthew C. Fitzpatrick, Tricia A. Miller, Renee C. E. Culver, Loan Braswell, J. Andrew DeWoody
2017, Conservation Biology (31) 406-415
Renewable energy production is expanding rapidly despite mostly unknown environmental effects on wildlife and habitats. We used genetic and stable isotope data collected from Golden Eagles (Aquila chrysaetos) killed at the Altamont Pass Wind Resource Area (APWRA) in California in demographic models to test hypotheses about the geographic extent and...
Reaction softening by dissolution–precipitation creep in a retrograde greenschist facies ductile shear zone, New Hampshire, USA
Ryan J. McAleer, David L. Bish, Michael J. Kunk, Karri R. Sicard, Peter M. Valley, Gregory J. Walsh, Bryan A. Wathen, R. P. Wintsch
2017, Journal of Metamorphic Geology (35) 95-119
We describe strain localization by a mixed process of reaction and microstructural softening in a lower greenschist facies ductile fault zone that transposes and replaces middle to upper amphibolite facies fabrics and mineral assemblages in the host schist of the Littleton Formation near Claremont, New Hampshire. Here, Na-poor muscovite and...
Brook trout use of thermal refugia and foraging habitat influenced by brown trout
Nathaniel P. Hitt, Erin Snook, Danielle L. Massie
2017, Canadian Journal of Fisheries and Aquatic Sciences (74) 406-418
The distribution of native brook trout (Salvelinus fontinalis) in eastern North America is often limited by temperature and introduced brown trout (Salmo trutta), the relative importance of which is poorly understood but critical for conservation and restoration planning. We evaluated effects of brown trout on brook trout behavior and habitat...
A century of landscape disturbance and urbanization of the San Francisco Bay region affects the present-day genetic diversity of the California Ridgway’s rail (Rallus obsoletus obsoletus)
Dustin A. Wood, Thuy-Vy D. Bui, Cory T. Overton, Amy G. Vandergast, Michael L. Casazza, Joshua M. Hull, John Y. Takekawa
2017, Conservation Genetics (18) 131-146
Fragmentation and loss of natural habitat have important consequences for wild populations and can negatively affect long-term viability and resilience to environmental change. Salt marsh obligate species, such as those that occupy the San Francisco Bay Estuary in western North America, occupy already impaired habitats as result of human development...
Skeletal variation and taxonomic boundaries among mainland and island populations of the common treeshrew (Mammalia: Scandentia: Tupaiidae)
Eric J. Sargis, Neal Woodman, Natalie C. Morningstar, Tiffany N. Bell, Link E. Olson
2017, Biological Journal of the Linnean Society (120) 286-312
Treeshrews (order Scandentia) include 23 currently recognized species of small-bodied mammals from South and Southeast Asia. The taxonomy of the common treeshrew, Tupaia glis, which inhabits the Malay Peninsula south of the Isthmus of Kra, as well as a variety of offshore islands, has an extremely complicated history resulting from its...
Disentangling density-dependent dynamics using full annual cycle models and Bayesian model weight updating
Orin J. Robinson, Conor P. McGowan, Patrick K. Devers
2017, Journal of Applied Ecology (54) 670-678
Density dependence regulates populations of many species across all taxonomic groups. Understanding density dependence is vital for predicting the effects of climate, habitat loss and/or management actions on wild populations. Migratory species likely experience seasonal changes in the relative influence of density dependence on population processes such...
Legacy or colonization? Posteruption establishment of peregrine falcons (Falco peregrinus) on a volcanically active subarctic island.
Sarah A. Sonsthagen, J.C. Williams, Gary S. Drew, C.M. White, G. Kevin Sage, Sandra L. Talbot
2017, Ecology and Evolution (7) 107-114
How populations and communities reassemble following disturbances are affected by a number of factors, with the arrival order of founding populations often having a profound influence on later populations and community structure. Kasatochi Island is a small volcano located in the central Aleutian archipelago that erupted violently August 8, 2008,...
Anoxic nitrate reduction coupled with iron oxidation and attenuation of dissolved arsenic and phosphate in a sand and gravel aquifer
Richard L. Smith, Douglas B. Kent, Deborah A. Repert, J. K. Böhlke
2017, Geochimica et Cosmochimica Acta (196) 102-120
Nitrate has become an increasingly abundant potential electron acceptor for Fe(II) oxidation in groundwater, but this redox couple has not been well characterized within aquifer settings. To investigate this reaction and some of its implications for redox-sensitive groundwater contaminants, we conducted an in situ field study in a wastewater-contaminated aquifer...
Effect of body size and temperature on respiration of Galaxias maculatus (Pisces: Galaxiidae)
D. Milano, P.H. Vigliano, David A. Beauchamp
2017, New Zealand Journal of Marine and Freshwater Research (52) 295-303
Body mass and temperature are primary determinants of metabolic rate in ectothermic animals. Oxygen consumption of post-larval Galaxias maculatus was measured in respirometry trials under different temperatures (5–21°C) and varying body masses (0.1–>1.5 g) spanning a relevant range of thermal conditions and sizes. Specific respiration rates (R in g O2 g−1...
Sea-level rise and coastal groundwater inundation and shoaling at select sites in California, USA
Daniel J. Hoover, Kingsley Odigie, Peter W. Swarzenski, Patrick L. Barnard
2017, Journal of Hydrology: Regional Studies (11) 234-249
Study regionThe study region spans coastal California, USA, and focuses on three primary sites: Arcata, Stinson Beach, and Malibu Lagoon.Study focus1 m and 2 m sea-level rise (SLR) projections were used to assess vulnerability to SLR-driven groundwater emergence and shoaling at select low-lying, coastal sites in California. Separate...
Habitat selection by postbreeding female diving ducks: Influence of habitat attributes and conspecifics
Jane E. Austin, Shawn T. O’Neil, Jeffrey M. Warren
2017, Journal of Avian Biology (48) 295-308
Habitat selection studies of postbreeding waterfowl have rarely focused on within-wetland attributes such as water depth, escape cover, and food availability. Flightless waterfowl must balance habitat selection between avoiding predation risks and feeding. Reproductively successful female ducks face the greatest challenges because they begin the definitive prebasic molt at or...
Geomorphic change and sediment transport during a small artificial flood in a transformed post-dam delta: The Colorado River delta, United States and Mexico
Erich R. Mueller, John C. Schmidt, David J. Topping, Patrick B. Shafroth, Jesus Eliana Rodriguez-Burgueno, Jorge Ramírez-Hernández, Paul E. Grams
2017, Ecological Engineering (106) 757-775
The Colorado River delta is a dramatically transformed landscape. Major changes to river hydrology and morpho-dynamics began following completion of Hoover Dam in 1936. Today, the Colorado River has an intermittent and/or ephemeral channel in much of its former delta. Initial incision of the river channel in the upstream ∼50 km...
Lineage diversification of fringe-toed lizards (Phrynosomatidae: Uma notata complex) in the Colorado Desert: Delimiting species in the presence of gene flow
Andrew D. Gottscho, Dustin A. Wood, Amy G. Vandergast, Julio A. Lemos Espinal, John Gatesy, Tod Reeder
2017, Molecular Phylogenetics and Evolution (106) 103-117
Multi-locus nuclear DNA data were used to delimit species of fringe-toed lizards of theUma notata complex, which are specialized for living in wind-blown sand habitats in the deserts of southwestern North America, and to infer whether Quaternary glacial cycles or Tertiary geological events were important in shaping the historical biogeography...
