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Browse more than 160,000 publications authored by our scientists over the past 100+ year history of the USGS.  Publications available are: USGS-authored journal articles, series reports, book chapters, other government publications, and more.

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We are focused on some of the most significant issues society faces, and our science is making a substantial contribution to the well-being of the Nation and the world. Learn more about the major topics our research covers and the programs focused on those topics.

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Filter Total Items: 175538

Sapsucker wells as a keystone nutritional resource: Evaluating methods for detection of secondary sap consumers Sapsucker wells as a keystone nutritional resource: Evaluating methods for detection of secondary sap consumers

North American sapsuckers are considered double keystone species because they (1) excavate nest cavities that are used by other birds, small mammals, and invertebrates, and (2) create and maintain sap wells, a temporary nutritional resource available to a variety of secondary consumers. Most previous reports of secondary sap consumption relied on human observers and were based on either...
Authors
Richard Clawges, Shannon Blair, Jan H. Eitel, Leona Kay Svancara, Lee A. Vierling, Kerri Vierling

Initial responses of songbird communities to forest reclamation on legacy surface mines Initial responses of songbird communities to forest reclamation on legacy surface mines

Surface coal mining and subsequent reclamation efforts in the Appalachian Mountains, USA, transform the ecological characteristics of natural landscapes. The Forestry Reclamation Approach (FRA) is a mine reclamation method that emphasizes best management practices in forestry. FRA practices have demonstrated success in establishing native forests and accelerating natural succession on...
Authors
Rebecca N. Davenport, Christopher D. Barton, John J. Cox, Jacquelyn C. Guzy, Lauren Sherman, Jeffery L. Larkin, Todd Fearer, Steven J. Price
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Postrelease movements of captive-reared adult Atlantic Salmon in two Maine rivers Postrelease movements of captive-reared adult Atlantic Salmon in two Maine rivers

Objective Atlantic Salmon Salmo salar remain at critically low levels in the United States, with the last remaining populations located in the state of Maine. In 2021, a pilot captive-rearing program, similar to a smolt-to-adult supplementation, was implemented to boost naturally spawning adults in support of recovery goals.Methods We conducted a 2-year acoustic telemetry study to track...
Authors
Carolyn A. Merriam, Danielle Frechette, Joseph D. Zydlewski
By
Cooperative Research Units

Confocal laser-scanning microscopy (CLSM)-based thermal maturity of Tasmanites and progress in standardization of fluorescence microspectrometry Confocal laser-scanning microscopy (CLSM)-based thermal maturity of Tasmanites and progress in standardization of fluorescence microspectrometry

Evaluation of thermal maturity in vitrinite-free or vitrinite-deficient sediments via fluorescence microspectrometry can provide relevant information related to petroleum exploration and thermal history assessment. However, variation in spectral fluorescence properties of alginite macerals with increasing thermal maturity is largely underexplored. Here, authors of this study have applied...
Authors
Jolanta Kus, Paul C. Hackley
By
Energy Resources Program, Geology, Energy & Minerals Science Center

Longevity, age-specific survival, and mean generation time of Rana muscosa: Implications for conservation of possibly the longest lived Ranid frog Longevity, age-specific survival, and mean generation time of Rana muscosa: Implications for conservation of possibly the longest lived Ranid frog

Life history strategies vary widely among species and play a vital role in extinction risk, especially in a rapidly changing environment. For many taxa, information on life history such as longevity, lifespan, and generation time is incomplete. This is especially true for amphibians, which have experienced large-scale declines in recent decades. The mountain yellow-legged frog (Rana...
Authors
Cynthia Joan Hitchcock, Adam R. Backlin, Amanda Renee Goldberg, Sarah Kay Thomsen, Erin L. Muths, Elizabeth Gallegos, Robert D. Fisher
By
Ecosystems Mission Area, Fort Collins Science Center, Western Ecological Research Center (WERC)

Tree swallows as indicators of per- and polyfluoroalkyl substance exposure and effects at select Department of Defense sites along the East Coast and at sites with different sources in the Upper Midwest, United States Tree swallows as indicators of per- and polyfluoroalkyl substance exposure and effects at select Department of Defense sites along the East Coast and at sites with different sources in the Upper Midwest, United States

Questions remain about the distribution of per- and polyfluoroalkyl substances (PFAS) in the environment, the sources and movement within and between ecosystems, and whether there are effects from such exposure. Information from the Upper Midwest and the mid-Atlantic regions of the United States, which have different PFAS sources, were investigated. Concentrations of Total40 (sum of 40...
Authors
Christine M. Custer, Paul M. Dummer, Sandra L. Schultz, Natalie Karouna-Renier, Cole W. Matson
By
Ecosystems Mission Area, Upper Midwest Environmental Sciences Center
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