Publications
USGS research activities relevant to Alaska have yielded more than 9400 historical publications. This page features some of the most recent newsworthy research findings.
Filter Total Items: 3087
Post-breeding migration of Dutch-breeding black-tailed godwits: timing, routes, use of stopovers, and nonbreeding destinations Post-breeding migration of Dutch-breeding black-tailed godwits: timing, routes, use of stopovers, and nonbreeding destinations
Conservation of long-distance migratory shorebirds is complex because these species use habitats spread across continents and hemispheres, making identification of critical habitats and potential bottlenecks in the annual cycle especially difficult. The population of Black-tailed Godwits that breeds in Western Europe, Limosa limosa limosa, has declined precipitously over the past few...
Authors
Jos C. E. W. Hooijmeijer, Nathan R. Senner, T. Lee Tibbitts, Robert E. Gill, David C. Douglas, Leo W. Bruinzeel, Eddy Wymenga, Theunis Piersma
Free-living waterfowl and shorebirds Free-living waterfowl and shorebirds
No abstract available.
Authors
Daniel M. Mulcahy
New ichnological, paleobotanical and detrital zircon data from an unnamed rock unit in Yukon-Charley Rivers National Preserve (Cretaceous: Alaska): Stratigraphic implications for the region New ichnological, paleobotanical and detrital zircon data from an unnamed rock unit in Yukon-Charley Rivers National Preserve (Cretaceous: Alaska): Stratigraphic implications for the region
A paleontological reconnaissance survey on Cretaceous and Paleogene terrestrial units along the Yukon River drainage through much of east-central Alaska has provided new chronostratigraphic constraints, paleoclimatological data, and the first information on local biodiversity within an ancient, high-latitude ecosystem. The studied unnamed rock unit is most notable for its historic...
Authors
Anthony R. Fiorillo, Federico Fanti, Chad Hults, Stephen T Hasiotis
Estuarine removal of glacial iron and implications for iron fluxes to the ocean Estuarine removal of glacial iron and implications for iron fluxes to the ocean
While recent work demonstrates that glacial meltwater provides a substantial and relatively labile flux of the micronutrient iron to oceans, the role of high-latitude estuary environments as a potential sink of glacial iron is unknown. Here we present the first quantitative description of iron removal in a meltwater-dominated estuary. We find that 85% of “dissolved” Fe is removed in the...
Authors
Andrew W. Schroth, John Crusius, Ian Hoyer, Robert Campbell
Wildlife health in a rapidly changing North: focus on avian disease Wildlife health in a rapidly changing North: focus on avian disease
Climate-related environmental changes have increasingly been linked to emerging infectious diseases in wildlife. The Arctic is facing a major ecological transition that is expected to substantially affect animal and human health. Changes in phenology or environmental conditions that result from climate warming may promote novel species assemblages as host and pathogen ranges expand to...
Authors
Caroline R. Van Hemert, John M. Pearce, Colleen M. Handel
Sources of global climate data and visualization portals Sources of global climate data and visualization portals
Climate is integral to the geophysical foundation upon which ecosystems are structured. Knowledge about mechanistic linkages between the geophysical and biological environments is essential for understanding how global warming may reshape contemporary ecosystems and ecosystem services. Numerous global data sources spanning several decades are available that document key geophysical...
Authors
David C. Douglas
The 2010 slow slip event and secular motion at Kilauea, Hawai`i inferred from TerraSAR-X InSAR data The 2010 slow slip event and secular motion at Kilauea, Hawai`i inferred from TerraSAR-X InSAR data
We present here an Small BAseline Subset (SBAS) algorithm to extract both transient and secular ground deformations on the order of millimeters in the presence of tropospheric noise on the order of centimeters, when the transient is of short duration and known time, and the background deformation is smooth in time. We applied this algorithm to study the 2010 slow slip event as well as...
Authors
Jingyi Chen, Howard A. Zebker, Paul Segall, Asta Miklius
Free-living waterfowl and shorebirds Free-living waterfowl and shorebirds
No abstract available.
Authors
Daniel M. Mulcahy
Carbonate rocks of the Seward Peninsula, Alaska: Their correlation and paleogeographic significance Carbonate rocks of the Seward Peninsula, Alaska: Their correlation and paleogeographic significance
Paleozoic carbonate strata deposited in shallow platform to off-platform settings occur across the Seward Peninsula and range from unmetamorphosed Ordovician–Devonian(?) rocks of the York succession in the west to highly deformed and metamorphosed Cambrian–Devonian units of the Nome Complex in the east. Faunal and lithologic correlations indicate that early Paleozoic strata in the two...
Authors
Julie A. Dumoulin, Alta Harris, John E. Repetski
Change-in-ratio Change-in-ratio
Change-in-ratio (CIR) methods are used to estimate parameters for ecological populations subject to differential removals from population subclasses. Subclasses can be defined according to criteria such as sex, age, or size of individuals. Removals are generally in the form of closely monitored sport or commercial harvests. Estimation is based on observed changes in subclass proportions...
Authors
Mark S. Udevitz
Brant (Branta bernicla) Brant (Branta bernicla)
No abstract available
Authors
T.L. Lewis, David H. Ward, James S. Sedinger, Austin Reed, Dirk V. Derksen