Can We Make Wind Power Compatible with Wildlife?
This story is a case study on wind energy and bats in Hawaii that communicates the impact and value of USGS science to people and the environment.See the story
Mission Areas L2 Landing Page Tabs
Functional relationships among aquatic species for conserving and restoring aquatic community function.
The Oregon Cooperative Unit, graduate students, and a group of U.S. and international collaborators are conducting long-term research on the Adélie penguin on Ross Island, Antarctica. This species depends on sea ice (obligate) and in some regions of Antarctica is being affected by climate change’s influence on sea ice patterns.
Improving fish passage is vital for restoring populations of salmon and other migratory fish.
Many species of sea turtle are endangered. Conservation of these species is complicated by their complex life history, the broad spatial distribution of different life stages, and their migratory nature. Monitoring programs track general status of populations and evaluate the effect of management actions on species conservation.
Rivers are the conduit between inland waters and the oceans for fish, nutrients, and sediments
On an island in the U.S. Virgin Islands, USGS scientists discover corals are seeking refuge from climate change in mangroves.
USGS scientists study the mechanisms of aquatic species invasions across the South Atlantic Landscape Conservation Cooperative (SALCC) with the help of the Nonindigenous Aquatic Species Database (NAS).
Deserts are areas of the country which receive less than 10 in (250 mm) annual precipitation. In the United States, we have four distinct major deserts. Three are “hot deserts” because they receive precipitation in the summer months (Mojave, Sonoran, Chihuahuan) and one “cold desert” because it receives precipitation during the winter (Great Basin).
Telemetry tracking of captured pythons reveals movement patterns of the invasive Burmese python in the Greater Everglades, information that managers can use to prioritize python control efforts.
Ecological Stressors are physical, chemical, and biological factors that impact the condition and integrity of ecosystems and can change the trajectories of species and ecosystems. Stressors can be natural (fire, storms, insect outbreaks), or anthropogenic (e.g., climate change, fire, energy development).
USGS research on wetlands spans the range from freshwater alpine lakes in the Western United States to salt marshes along the Gulf; from the coastline of Alaska to the Southeastern US, and from vernal pools to the Great Lakes. Our scientists conduct research at local, national and international scales.
USGS researchers tag and track endangered and threatened sea turtles to inform adaptive management strategies in marine protected areas.
Characteristics of fall chum salmon spawning habitat on a mainstem river in Interior Alaska
Chum salmon (Oncorhynchus keta) are the most abundant species of salmon spawning in the Yukon River drainage system, and they support important personal use, subsistence, and commercial fisheries. Chum salmon returning to the Tanana River in Interior Alaska are a significant contribution to the overall abundance of Yukon River chum salmon and an...Burril, Sean E.; Zimmerman, Christian E.; Finn, James E.
Alaska’s changing fire regime - Implications for the vulnerability of its boreal forests
A synthesis was carried out to examine Alaska’s boreal forest fire regime. During the 2000s, an average of 767 000 ha·year–1 burned, 50% higher than in any previous decade since the 1940s. Over the past 60 years, there was a decrease in the number of lightning-ignited fires, an increase in extreme lightning-ignited fire...Kasischke, Eric S.; Verbyla, David L.; Rupp, T. Scott; McGuire, A. David; Murphy, Karen A.; Jandt, R.; Barnes, Jennifer L.; Hoy, E.; Duffy, Paul A; Calef, Monika; Turetsky, Merritt R.
Resilience of Alaska’s boreal forest to climatic change
This paper assesses the resilience of Alaska’s boreal forest system to rapid climatic change. Recent warming is associated with reduced growth of dominant tree species, plant disease and insect outbreaks, warming and thawing of permafrost, drying of lakes, increased wildfire extent, increased postfire recruitment of deciduous trees, and...Chapin, F.S.; McGuire, A. David; Ruess, Roger W.; Hollingsworth, Teresa N.; Mack, M.C.; Johnstone, J.F.; Kasischke, E.S.; Euskirchen, E.S.; Jones, J.B.; Jorgenson, M.T.; Kielland, K.; Kofinas, G.; Turetsky, M.R.; Yarie, J.; Lloyd, A.H.; Taylor, D.L.
Calibrating recruitment estimates for mourning doves from harvest age ratios
We examined results from the first national-scale effort to estimate mourning dove (Zenaida macroura) age ratios and developed a simple, efficient, and generalizable methodology for calibrating estimates. Our method predicted age classes of unknown-age wings based on backward projection of molt distributions from fall harvest collections to...Miller, David A.; Otis, David L.
Modeling the Effects of Mortality on Sea Otter Populations
Conservation and management of sea otters can benefit from managing the magnitude and sex composition of human related mortality, including harvesting within sustainable levels. Using age and sex-specific reproduction and survival rates from field studies, we created matrix population models representing sea otter populations with growth rates of...Bodkin, James L.; Ballachey, Brenda E.
The changing effects of Alaska’s boreal forests on the climate system
In the boreal forests of Alaska, recent changes in climate have influenced the exchange of trace gases, water, and energy between these forests and the atmosphere. These changes in the structure and function of boreal forests can then feed back to impact regional and global climates. In this manuscript, we examine the type and magnitude of the...Euskirchen, E.S.; McGuire, A. David; Chapin, F.S.; Rupp, T.S.
Recovery of sediment characteristics in moraine, headwater streams of northern Minnesota after forest harvest
We investigated the recovery of sediment characteristics in four moraine, headwater streams in north-central Minnesota after forest harvest. We examined changes in fine sediment levels from 1997 (preharvest) to 2007 (10 years postharvest) at study plots with upland clear felling and riparian thinning, using canopy cover, proportion of...Vondracek, Bruce C.; Merten, Eric C.; Hemstad, Nathaniel A.; Kolka, Randall K.; Newman, Raymond M.; Verry, Elon S.
Abdominally implanted transmitters with percutaneous antennas affect the dive performance of Common Eiders
Implanted transmitters have become an important tool for studying the ecology of sea ducks, but their effects remain largely undocumented. To address this, we assessed how abdominally implanted transmitters with percutaneous antennas affect the vertical dive speeds, stroke frequencies, bottom time, and dive duration of captive Common Eiders (...Powell, Abby N.; Latty, Christopher J.; Hollmén, Tuula E.; Petersen, Margaret R.; Andrews, Russel D.
Comparative morphology among northern populations of breeding Cooper's Hawks
Few studies at a broad geographical scale have characterized intraspecific variation in morphology of woodland hawks in the genus Accipiter. From 1999 to 2007 we investigated morphological variation in large samples of live Cooper's Hawks (A. cooperii) nesting in four study areas: coniferous woodland around Victoria, British Columbia, Canada...Rosenfield, Robert N.; Rosenfield, Laura J.; Bielefeldt, John; Murphy, Robert K.; Stewart, Andrew C.; Stout, William E.; Driscoll, Timothy G.; Bozek, Michael A.
Scale-dependent mechanisms of habitat selection for a migratory passerine: an experimental approach
Habitat selection theory predicts that individuals choose breeding habitats that maximize fitness returns on the basis of indirect environmental cues at multiple spatial scales. We performed a 3-year field experiment to evaluate five alternative hypotheses regarding whether individuals choose breeding territories in heterogeneous landscapes on the...Donovan, Therese M.; Cornell, Kerri L.
Habitat selection and abundance of young-of-year smallmouth bass in north temperate lakes
Habitat use during early life history plays an important role in the ecology of smallmouth bass Micropterus dolomieu in north temperate lakes. The highest levels of mortality occur during the first year of life, and the habitat selected probably affects mortality. We used resource selection functions and abundance data from two northern...Brown, Peter James; Bozek, Michael A.
Assessing effects of water abstraction on fish assemblages in Mediterranean streams
1. Water abstraction strongly affects streams in arid and semiarid ecosystems, particularly where there is a Mediterranean climate. Excessive abstraction reduces the availability of water for human uses downstream and impairs the capacity of streams to support native biota. 2. We investigated the flow regime and related variables in six river...Benejam, Lluis; Angermeier, Paul L.; Munne, Antoni; García-Berthou, Emili