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Bats in a changing landscape: Linking occupancy and traits of a diverse montane bat community to fire regime
1. Wildfires are increasing in incidence and severity across the western US, leading to changes in forest structure and wildlife habitats. Knowledge of how species respond to fire-driven habitat changes in these landscapes is limited and generally disconnected from our understanding of adaptations that underpin responses to fire. 2. We aimed to...
Webb, Elisabeth B.; Blakely, R.V.; Kesler, D.C.; Siegel, R.B.; Barrios, D.C.; Johnson, J.M. The rise of an apex predator following deglaciation
AimSea otters (Enhydra lutris) are an apex predator of the nearshore marine community and nearly went extinct at the turn of the 20th century. Reintroductions and legal protection allowed sea otters to re‐colonize much of their former range. Our objective was to chronicle the colonization of this apex predator in Glacier Bay, Alaska, to help...
Hooten, Mevin B.; Esslinger, George G. Future directions to escalate benefits of stepping-stone approach for conservation translocations
Through a reintroduction case study on the critically endangered Vancouver Island marmot (Marmota vancouverensis), we introduced a ‘stepping-stone’ approach which utilizes the transition of released individuals among populations to maximize demographic growth potential (Lloyd et al. 2019). We greatly appreciate and hereby reflect on the...
Lloyd, N.A.; Hostetter, N.J.; Jackson, C.L.; Converse, Sarah J.; Moehrenschlager, A. Effects of historic wildfire and prescribed fire on site occupancy of bats in Shenandoah National Park, Virginia, USA
Given high likelihood of regional extirpation of several once-common bat species in eastern North America from White-nose Syndrome, it is critical that impacts of forest management activities such as prescribed fire are known to minimize potentially additive negative effects on bat populations. Historic wildfires may offer a suitable surrogate to...
Ford, W. Mark; Austin, Lauren V.; Alexander Silvis; Powers, Karen E. Largemouth bass natural history
No abstract available.
Miranda, Leandro E. Changes in body condition and diet of lotic Smallmouth Bass across two flow regimes during summer months at the southern extent of their native range
The Ozark Plateau is located at the southern extent of native Smallmouth Bass Micropterus dolomieu range and water temperature and drought conditions during summer months may potentially affect growth of Smallmouth Bass in this region. Groundwater streams in the region do not warm to the same extent as runoff streams during summer months and could...
Middaugh, Christopher R.; Magoulick, Daniel D. First summer survival and channel unit habitat use by the Neosho subspecies of Smallmouth Bass (Micropterus dolomieu velox)
No abstract available.
Brewer, Shannon K.; Browne, Brandon L.; Thomas A. Worthington; Mollenhauer, Robert; Rodger, Anthony; Skoog, Matt; Burroughs, Jim Relatedness within and among Myotis septentrionalis colonies at a local scale
Abstract: We assessed parentage within and among maternity colonies of the northern long-eared bat (Myotis septentrionalis Troessart 1897) in north-central Kentucky from 2011–2013 to better understand colony social structure, formation, and membership dynamics. We intensively sampled colonies in close and remote (> 10 km) spatial proximity...
Ford, W. Mark; Miluska Olivera-Hyde; Alexander Silvis; Eric M. Hallerman; Eric R. Britzke A hierarchical Bayesian approach for handling missing classification data
Ecologists use classifications of individuals in categories to understand composition of populations and communities. These categories might be defined by demographics, functional traits, or species. Assignment of categories is often imperfect, but frequently treated as observations without error. When individuals are observed but not classified,...
Alison C. Ketz; Therese L. Johnson; Hooten, Mevin B.; N. Thompson Hobbs
Cooperative Fish and Wildlife Research Units program—2018 year in review
The Cooperative Fish and Wildlife Research Units (CRU) program had an interesting and challenging year in 2018. We made significant strategic advances on many fronts and had setbacks in others.Our relationship with the U.S. Fish and Wildlife Service, the agency we belonged to from 1935 to the mid-1990s, was further reinforced through strategic...
Organ, John F.; Thompson, John D.; Childs, Dawn E.; Dennerline, Donald E.
Cooperative Fish and Wildlife Research Units program—2018 year in review postcard
This postcard provides details about the "Cooperative Fish and Wildlife Research Units Program—2018 Year in Review," U.S. Geological Survey Circular 1452, now available at https://doi.org/10.3133/cir1452. In this report, you will find details about the Cooperative Fish and Wildlife Research Units (CRU) program relating to its background, fish and...
Organ, John F.; Thompson, John D.; Childs, Dawn; Dennerline, Donald E. Fish growth changes over time in a Midwestern U.S. lake
Growth of Walleyes Sander vitreus, Yellow Bass Morone mississippiensis, Common Carp Cyprinus carpio, and Black Bullheads Ameiurus melas was assessed in Clear Lake, Iowa, over several decades and in relation to environmental variables. Growth of Common Carp was positively correlated with phytoplankton concentration. Recent Black Bullhead growth was...
Pierce, ClayUnder the guidelines of the Cooperative Research Agreement, CRU is required to communicate with funders, cooperators, stakeholders, and the public. CRU maintains outreach pathways and participation among state, federal, university, and private researchers.
In the Driver’s Seat
Student dusts the Model A Ford coupe used by USGS scientists from the 1930s to 1965.
USGS Volunteer Student at the Smithsonian Natural History Museum
The Smithsonian Natural History Museum offers hands-on learning experiences.
Student volunteer works in the USGS libraries map collection
Student volunteer explores the historic USGS map collection.
Pallid Sturgeon
The pallid sturgeon is an endangered riverine sturgeon with historical distribution restricted to parts of the Yellowstone, Missouri, Mississippi, and Atchafalaya Rivers. Although rare, pallid sturgeon in the lower Mississippi River appear to be naturally recruiting, and information about habitat use is important to conserve this species. This study seeks to provide
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Phone: (703) 648 - 4260
Fax: (703) 648 - 4269