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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: 175547

Evolutionary ecology of masting: Mechanisms, models, and climate change Evolutionary ecology of masting: Mechanisms, models, and climate change

Many perennial plants show mast seeding, characterized by synchronous and highly variable reproduction across years. We propose a general model of masting, integrating proximate factors (environmental variation, weather cues, and resource budgets) with ultimate drivers (predator satiation and pollination efficiency). This general model shows how the relationships between masting and...
Authors
Michal Bogdziewicz, Dave Kelly, Davide Ascoli, Thomas Caignard, Francesco Chianucci, Elizabeth E. Crone, Emilie Fleurot, Jessie Foest, Georg Gratzer, Tomika Hagiwara, Qingmin Han, Valentin Journe, Lea Keurinck, Katarzyna Kondrat, Ryan McClory, Jalene M. LaMontagne, Ignacio A. Mundo, Anita Nussbaumer, Iris Oberklammer, Misuzu Ohno, Ian S. Pearse, Mario B. Pesendorfer, Giulia Resente, Akiko Satake, Mitsue Shibata, Rebecca Snell, Jakub Szymkowiak, Laura Touzot, Rafal Zwolak, Magdalena Zywiec, Andrew Hacket-Pain
By
Ecosystems Mission Area, Fort Collins Science Center

Microbial diversity, genomics, and phage–host interactions of cyanobacterial harmful algal blooms Microbial diversity, genomics, and phage–host interactions of cyanobacterial harmful algal blooms

The occurrence of cyanobacterial harmful algal blooms (cyanoHABs) is related to their physical and chemical environment. However, less is known about their associated microbial interactions and processes. In this study, cyanoHABs were analyzed as a microbial ecosystem, using 1 year of 16S rRNA sequencing and 70 metagenomes collected during the bloom season from Lake Okeechobee (Florida...
Authors
Lauren E. Krausfeldt, Elizaveta Shmakova, Hyo Won Lee, Viviana Mazzei, Keith A. Loftin, Robert P Smith, Emily E. Karwacki, Eric Fortman, B.H. Rosen, Hidetoshi Urakawa, Manoj Dadlani, Rita Colwell, Jose V. Lopez
By
Caribbean-Florida Water Science Center (CFWSC)

Egg mercury concentration and egg size varies with position in the laying sequence in two songbird species Egg mercury concentration and egg size varies with position in the laying sequence in two songbird species

In birds, mercury embryotoxicity can occur through the transfer of mercury from the female to her eggs. Maternal transfer of mercury can vary by egg position in the laying sequence, with first-laid eggs often exhibiting greater mercury concentrations than subsequently laid eggs. We studied egg mercury concentration, mercury burden (total amount of mercury in the egg), and egg...
Authors
C. Alex Hartman, Joshua T. Ackerman, Breanne Cooney, Mark P. Herzog
By
Ecosystems Mission Area, Western Ecological Research Center (WERC)

Climate change scenarios for air and water temperatures in the upper San Francisco Estuary: Implications for thermal regimes and Delta Smelt Climate change scenarios for air and water temperatures in the upper San Francisco Estuary: Implications for thermal regimes and Delta Smelt

Climate projections and their effects in the San Francisco Estuary have been evaluated as part of the US Geological Survey’s CASCaDE2 project. Understanding the ecological effects of climate change can help manage and maintain the ecological health and productivity of the San Francisco Estuary. In this study, we assessed downscaled air temperature data from 10 global climate models (GCMs...
Authors
Brock Huntsman, Larry R. Brown, Marissa L. Wulff, Noah Knowles, R. Wayne Wagner, Frederick V. Feyrer
By
Water Resources Mission Area, California Water Science Center

A circumpolar study unveils a positive non-linear effect of temperature on arctic arthropod availability that may reduce the risk of warming-induced trophic mismatch for breeding shorebirds A circumpolar study unveils a positive non-linear effect of temperature on arctic arthropod availability that may reduce the risk of warming-induced trophic mismatch for breeding shorebirds

Seasonally abundant arthropods are a crucial food source for many migratory birds that breed in the Arctic. In cold environments, the growth and emergence of arthropods are particularly tied to temperature. Thus, the phenology of arthropods is anticipated to undergo a rapid change in response to a warming climate, potentially leading to a trophic mismatch between migratory insectivorous...
Authors
Aurelie Chagnon-Lafortune, Eliane Duchesne, Pierre Legagneux, Laura McKinnon, Jeroen Reneerkens, Nicolas Casajus, Kenneth F. Abraham, Elise Bolduc, Glen S. Brown, Stephen C. Brown, H. River Gates, Olivier Gilg, Marie-Andrée Giroux, Kirsty Gurney, Steve Kendall, Eunbi Kwon, Richard B. Lanctot, David B. Lank, Nicolas Lecomte, Maria Leung, Joe Liebezeit, R.I.G. Morrison, Erica Nol, David C. Payer, Donald Reid, Daniel R. Ruthrauff, Sarah T. Saalfeld, Brett K. Sandercock, Paul Smith, Niels Martin Schmidt, Ingrid Tulp, David H. Ward, Toke Thomas Hoye, Dominique Berteaux, Joel Bety
By
Alaska Science Center

Complex patterns of genetic population structure in the mouthbrooding marine catfish, Bagre marinus, in the Gulf of Mexico and U.S. Atlantic Complex patterns of genetic population structure in the mouthbrooding marine catfish, Bagre marinus, in the Gulf of Mexico and U.S. Atlantic

Patterns of genetic variation reflect interactions among microevolutionary forces that vary in strength with changing demography. Here, patterns of variation within and among samples of the mouthbrooding gafftopsail catfish (Bagre marinus, Family Ariidae) captured in the U.S. Atlantic and throughout the Gulf of Mexico were analyzed using genomics to generate neutral and non-neutral SNP...
Authors
David S. Portnoy, Shannon J. O’Leary, Andrew T. Fields, Christopher M. Hollenbeck, Dean Grubbs, Cheston T. Peterson, Jayne M. Gardiner, Douglas H. Adams, Brett J. Falterman, Marcus Drymon, Jeremy M. Higgs, Erin L. Pulster, Tonya R. Wiley, Steven A. Murawski
By
Ecosystems Mission Area, Columbia Environmental Research Center
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