Publications
This list of publications includes peer-review journal articles, official USGS publications series, reports and more authored by scientists in the Ecosystems Mission Area. A database of all USGS publications, with advanced search features, can be accessed at the USGS Publications Warehouse.
Filter Total Items: 41894
Aquatic vegetation dynamics in the Upper Mississippi River over 2 decades spanning vegetation recovery
Macrophytes have recovered in rivers across the world, but long-term data and studies are lacking regarding community assembly and diversity changes coincident with macrophyte recovery. We investigated patterns of aquatic vegetation species composition and diversity in thousands of sites in the Upper Mississippi River, USA, spanning 21 y of monitoring and a period of vegetation recovery. We analyz
Authors
Kristen L. Bouska, Danelle M. Larson, Deanne C. Drake, Eric M. Lund, Alicia M. Carhart, Kyle R. Bales
Directional selection shifts trait distributions of planted species in dryland restoration
The match between species trait values and local abiotic filters can restrict community membership. An often-implicit assumption of this relationship is that abiotic filters select for a single locally optimal strategy, though difficulty in isolating effects of the abiotic environment from those of dispersal limitation and biotic interactions has resulted in few empirical tests of this assumption.
Authors
Kathleen R. Balazs, Seth M. Munson, Caroline Ann Havrilla, Bradley J. Butterfield
Growing as slow as a turtle: Unexpected maturational differences in a small, long-lived species
Turtle body size is associated with demographic and other traits like mating success, reproductive output, maturity, and survival. As such, growth analyses are valuable for testing life history theory, demographic modeling, and conservation planning. Two important but unsettled research areas relate to growth after maturity and growth rate variation. If individuals exhibit indeterminate growth aft
Authors
Devin Edmonds, Michael J. Dreslik, Jeffrey E. Lovich, Thomas P. Wilson, Carl H. Ernst
Climatic controls on soil carbon accumulation and loss in a dryland ecosystems
Arid and semiarid ecosystems drive year-to-year variability in the strength of the terrestrial carbon (C) sink, yet there is uncertainty about how soil C gains and losses contribute to this variation. To address this knowledge gap, we embedded C-depleted soil mesocosms, containing litter or biocrust C inputs, within an in situ dryland ecosystem warming experiment. Over the course of one year, chan
Authors
Bonnie G. Waring, Kenneth R Smith, Edmund E. Grote, Armin J. Howell, Robin H. Reibold, Colin L Tucker, Sasha C. Reed
A science agenda to inform natural resource management decisions in an era of ecological transformation
Earth is experiencing widespread ecological transformation in terrestrial, freshwater, and marine ecosystems that is attributable to directional environmental changes, especially intensifying climate change. To better steward ecosystems facing unprecedented and lasting change, a new management paradigm is forming, supported by a decision-oriented framework that presents three distinct management c
Authors
Shelley Crausbay, Helen Sofaer, Amanda E. Cravens, Brian C. Chaffin, Katherine R. Clifford, John E. Gross, Corrine N. Knapp, David J Lawrence, Dawn Magness, Abraham J. Miller-Rushing, Gregor W. Schuurman, Camille S. Stevens-Rumann
RAD adaptive management for transforming ecosystems
Intensifying global change is propelling many ecosystems toward irreversible transformations. Natural resource managers face the complex task of conserving these important resources under unprecedented conditions and expanding uncertainty. As once familiar ecological conditions disappear, traditional management approaches that assume the future will reflect the past are becoming increasingly unten
Authors
Abigail Lynch, Laura Thompson, John M. Morton, Erik A. Beever, Michael Clifford, Douglas Limpinsel, Robert T. Magill, Dawn R. Magness, Tracy A. Melvin, Robert A. Newman, Mark T. Porath, Frank J. Rahel, Joel H. Reynolds, Gregor W. Schuurman, Suresh Sethi, Jennifer L. Wilkening
Responding to ecological transformation: Mental models, external constraints, and manager decision-making
Ecological transformation creates many challenges for public natural resource management and requires managers to grapple with new relationships to change and new ways to manage it. In the context of unfamiliar trajectories of ecological change, a manager can resist, accept, or direct change, choices that make up the resist-accept-direct (RAD) framework. In this article, we provide a conceptual fr
Authors
Katherine R. Clifford, Amanda E. Cravens, Corrine N. Knapp
South Africa's experimental fisheries closures and recovery of the endangered African penguin
In a scientifically-transformative project, South Africa implemented a decade-long field experiment to understand how fisheries may be affecting its most iconic seabird, the African penguin Spheniscus demersus. This unique effort prohibits the take of anchovy and sardine within relatively small areas around four African penguin breeding colonies, two in the Benguela upwelling ecosystem and two in
Authors
William J. Sydeman, George L. Hunt, E.K. Pikitch, Julia K. Parrish, John F. Piatt, P Dee Boersma, Les Kaufman, Daniel W. Anderson, Sarah Ann Thompson, Richard B. Sherley
Cyanobacteria, cyanotoxin synthetase gene, and cyanotoxin occurrence among selected large river sites of the conterminous United States, 2017–18
The U.S. Geological Survey measured cyanobacteria, cyanotoxin synthetase genes, and cyanotoxins at 11 river sites throughout the conterminous United States in a multiyear pilot study during 2017–19 through the National Water Quality Assessment Project to better understand the occurrence of cyanobacteria and cyanotoxins in large inland and coastal rivers. This report focuses on the first 2 years of
Authors
Robert E. Zuellig, Jennifer L. Graham, Erin A. Stelzer, Keith A. Loftin, Barry H. Rosen
Mercury exposure of tidal marsh songbirds in the northeastern United States and its association with nest survival
The biogeochemistry of tidal marsh sediments facilitates the transformation of mercury (Hg) into the biologically available form methylmercury (MeHg), resulting in elevated Hg exposures to tidal marsh wildlife. Saltmarsh and Acadian Nelson’s sparrows (Ammospiza caudacutua and A. nelsoni subvirgatus, respectively) exclusively inhabit tidal marshes, potentially experiencing elevated risk to Hg expos
Authors
Katherine J Ruskin, Garth Herring, Collin Eagles-Smith, Alyssa B. Eiklor, Chris S Elphick, Matthew A. Etterson, Chrisopher B. Field, Rebecca A. Longnecker, Adrienne I. Kovach, W Greg Shriver, James F. Walsh, Brian J. Olsen
Long-term variation in polar bear body condition and maternal investment relative to a changing environment
In the Arctic, warming air and ocean temperatures have resulted in substantial changes to sea ice, which is primary habitat for polar bears (Ursus maritimus). Reductions in extent, duration, and thickness have altered sea ice dynamics, which influences the ability of polar bears to reliably access marine mammal prey. Because nutritional condition is closely linked to population vital rates, a prog
Authors
Todd C. Atwood, Karyn D. Rode, David C. Douglas, Kristin S. Simac, Anthony Pagano, Jeffrey F. Bromaghin
Are drought indices and climate data good indicators of ecologically relevant soil moisture dynamics in drylands?
Droughts are disproportionately impacting global dryland regions where ecosystem health and function are tightly coupled to moisture availability. Drought severity is commonly estimated using algorithms such as the standardized precipitation-evapotranspiration index (SPEI), which can estimate climatic water balance impacts at various hydrologic scales by varying computational length. However, the
Authors
David Barnard, Matthew Germino, John B. Bradford, Rory O'Connor, Caitlin M. Andrews, Robert K Shriver