All Publications
Access all publications and filter by type, location, and search for keywords to find specific science and data information conducted by our scientists.
Filter Total Items: 171524
Records of fleas (Siphonaptera) from Delaware
We present an annotated checklist of fleas (Siphonaptera) known to occur in the state of Delaware based on an examination of Siphonaptera collections at the University of Delaware and the Carnegie Museum of Natural History, as well as new specimens of fleas we collected from wildlife, other hosts, and tick flags. We review published records and compile them herein with our new records, which inclu
Authors
A.C Kennedy, W.S. Winter, A.L. Gardner, Neal Woodman, S.A. Shifflett, S. Redus, J.R. Newcomer, R. P. Eckerlin
Restoring blue carbon ecosystems
Mangroves, tidal marshes and seagrasses have experienced extensive historical reduction in extent due to direct and indirect effects of anthropogenic land use change. Habitat loss has contributed carbon emissions and led to foregone opportunities for carbon sequestration, which are disproportionately large due to high ‘blue carbon’ stocks and sequestration rates in these coastal ecosystems. As suc
Authors
Daniel A. Friess, Zoë I. Shribman, Milica Stankovic, Naima Iram, Melissa Millman Baustian, Carolyn J. Ewers Lewis
Distribution and abundance of Southwestern Willow Flycatchers (Empidonax traillii extimus) on the Upper San Luis Rey River, San Diego County, California—2023 data summary
Executive SummaryWe surveyed for Southwestern Willow Flycatchers (Empidonax traillii extimus; flycatcher) along the upper San Luis Rey River near Lake Henshaw in Santa Ysabel, California, in 2023. Surveys were completed at four locations: three downstream from Lake Henshaw, where surveys previously occurred from 2015 to 2022 (Rey River Ranch [RRR], Cleveland National Forest [CNF], Vista Irrigation
Authors
Scarlett L. Howell, Barbara E. Kus
Modeling coupled dynamics of an empirical predator-prey system to predict top predator recovery
Limited data, time, and funding lead conservation managers to make difficult choices in managing species recovery. Coupled dynamical models are relied upon for decision support, but their application to empirical predator-prey systems has generally been restricted to small, tractable species. To broaden their use in conservation decision-making, we developed a model suitable for predicting the pop
Authors
Samantha N. M. Hamilton, M. T. Tinker, Joseph Jackson, Joseph A. Tomoleoni, Michael C. Kenner, Julie L. Yee, Tomoko Bell, Max C. N. Castorani, Benjamin H. Becker, Brent B. Hughes
Tool use increases mechanical foraging success and tooth health in southern sea otters (Enhydra lutris nereis)
Although tool use may enhance resource utilization, its fitness benefits are difficult to measure. By examining longitudinal data from 196 radio-tagged southern sea otters (Enhydra lutris nereis), we found that tool-using individuals, particularly females, gained access to larger and/or harder-shelled prey. These mechanical advantages translated to reduced tooth damage during food processing. We a
Authors
Chris J. Law, M. Tim Tinker, Jessica A. Fujii, Teri Nicholson, Michelle M. Staedler, Joseph A. Tomoleoni, Colleen Young, Rita S. Mehta
Considerations and challenges in support of science and communication of fish consumption advisories for per- and polyfluoroalkyl substances
Federal, state, tribal, or local entities in the United States issue fish consumption advisories (FCAs) as guidance for safer consumption of locally caught fish containing contaminants. Fish consumption advisories have been developed for commonly detected compounds such as mercury and polychlorinated biphenyls. The existing national guidance does not specifically address the unique challenges asso
Authors
Jonathan M. Petali, Erin L. Pulster, Chris McCarthy, Heidi M. Pickard, lsie M. Sunderland, Jacqueline T. Bangma, Anna R. Robuck, Courtney Carignan, Kathryn A. Crawford, Megan E. Romano, Rainer Lohmann, Katherine E. von Stackelberg
U.S. Geological Survey data strategy 2023–33
The U.S. Geological Survey (USGS) has long recognized the strategic importance and value of well-managed data assets as an integral component of scientific integrity and foundational to the advancement of scientific research, decision making, and public safety. The USGS investment in the science lifecycle, including collection of unbiased data assets, interpretation, peer review, interpretive publ
Authors
Vivian B. Hutchison, Thomas E. Burley, Kyle W. Blasch, Paul E. Exter, Gregory L. Gunther, Aaron J. Shipman, Courtney M. Kelley, Cheryl A. Morris
Sight and blindness: The relationship between ostracod eyes, water depth, and light availability in the Arctic Ocean
Eye loss has been a long-standing interest in evolutionary biology. Many organisms that inhabit environments without light penetration, for example the deep sea, exhibit eye loss and thus become blind. However, water-depth distribution of eyes in marine organisms is poorly understood. Ostracods are widely distributed crustaceans, and many sighted marine ostracods have eye tubercles (lenses) on the
Authors
Jingwen Zhang, Moriaki Yasuhara, Chih-Lin Wei, Skye Yunshu Tian, Kyawt K. T. Aye, Laura Gemery, Thomas M. Cronin, Peter Frenzel, David J. Horne
Atlas of microscopic images of biochar using reflected light microscopy in biochar characterization
Derived through the thermochemical conversion of biomass, biochar is a carbon-rich substance recognized for its significance in environmental applications and sustainable agriculture. As interest in its utilization continues to rise, it becomes crucial to comprehend how the source material and pyrolysis parameters influence the properties of biochar and, consequently, to research the suitability o
Authors
Agnieszka Drobniak, Maria Mastalerz, Will Knauth, Omid Adarkani, Telma Ataíde dos Santos, Valdeci Caio de Faria, Tara Congo, Paul C. Hackley, Javin J. Hatcherian, James C. Hower, Henrik I. Petersen, Julito Reyes, Hamed Sanei
Species richness and distribution of Sphaeriidae surveyed with Environmental DNA metabarcoding
Freshwater bivalves of the family Sphaeriidae (fingernail, pea, and pill clams) are difficult to survey and identify due to their small size and overlapping morphological traits. Environmental DNA (eDNA) metabarcoding offers a cost-effective method for assessing species richness and distributional patterns at large scales. We evaluated sphaeriid species richness and distribution at 15 sites in the
Authors
Nathaniel T. Marshall, Katy E. Klymus, Carol A. Stepien
U.S. Geological Survey—Northern Prairie Wildlife Research Center 2021–23 research activity report
The mission of Northern Prairie Wildlife Research Center is to provide scientific information needed to conserve and manage the Nation’s natural capital for current and future generations, with an emphasis on migratory birds, Department of the Interior trust resources, and ecosystems of the Nation’s interior. This report provides an overview of the studies conducted at Northern Prairie during fisc
Post-Typhoon Mawar population counts of the endangered yǻyaguak (Mariana swiftlet) on Guam
The yǻyaguak (Mariana swiftlet, Aerodramus bartschi) is an endangered cave-roosting species native to Guam and southern Mariana Islands, Micronesia. The population on Guam has declined substantially over the last half century, likely due to the introduction of the brown treesnake (Boiga irregularis), but other factors have been proposed including habitat loss, pesticides, reduced food resources, a
Authors
Eben H. Paxton, P. Marcos Gorresen, Paul M. Cryan, Megan Parker