Publications
Browse publications authored by our scientists. Publications available are: USGS-authored journal articles, series reports, book chapters, other government publications, and more.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Filter Total Items: 5125
Size and age of Stonecats in Lake Champlain; Estimating growth at the margin of their range to aid in population management Size and age of Stonecats in Lake Champlain; Estimating growth at the margin of their range to aid in population management
Little is known about populations of Stonecat Noturus flavus, especially in the northeastern United States, where they are at the edge of their range. In Lake Champlain tributaries, Stonecats are listed as endangered in Vermont but not in New York. Here we describe the growth of Stonecats in two tributaries to Lake Champlain, one in Vermont (LaPlatte River), which was our primary...
Authors
Elizabeth A. Puchala, Donna L. Parrish, Derek H. Ogle
Integrating physiological stress into the movement ecology of migratory ungulates: A spatial analysis with mule deer Integrating physiological stress into the movement ecology of migratory ungulates: A spatial analysis with mule deer
Rapid climate and human land-use change may limit the ability of long-distance migratory herbivores to optimally track or “surf” high-quality forage during spring green-up. Understanding how anthropogenic and environmental stressors influence migratory movements is of critical importance because of their potential to cause a mismatch between the timing of animal movements and the...
Authors
David S. Jachowski, Matthew J. Kauffman, Brett R. Jesmer, Hall Sawyer, Joshua J. Millspaugh
A new modeling approach to prioritize riparian restoration to reduce sediment loading in two Virginia river basins A new modeling approach to prioritize riparian restoration to reduce sediment loading in two Virginia river basins
Human impact, particularly land cover changes (e.g., agriculture, construction) increase erosion and sediment loading into streams. Benthic species are negatively affected by silt deposition that coats and embeds stream substrate. Given that riparian buffers are effective sediment filters, riparian restoration is increasingly implemented by conservation groups to protect stream habitats...
Authors
Lisa N. Scott, Amy M. Villamagna, Paul L. Angermeier
Diel fledging patterns among grassland passerines: Relative impacts of energetics and predation risk Diel fledging patterns among grassland passerines: Relative impacts of energetics and predation risk
The time of day that nestlings fledge from a nest is thought to be shaped by predation risk and energetics. To minimize predation risk, fledging is predicted to start as early in the day as possible so that nestlings can maximize time outside the nest to find a safe place to stay before nightfall. Fledging times are predicted to be tightly grouped and to not be affected by the number of...
Authors
Christine Ribic, Christoph Ng, Nicola Koper, Kevin Ellison, Pamela J. Pietz, David J. Rugg
A values-based private landowner typology to improve grassland conservation initiatives A values-based private landowner typology to improve grassland conservation initiatives
Many conservation initiatives are based on natural science alone, despite an extensive body of literature demonstrating that the incorporation of social science generates more successful and lasting outcomes. The Land Use Value (LUV) scale is an example of a social science tool that grassland conservation practitioners can use to improve their understanding of the land use decisions of...
Authors
Lily A. Sweikert, Larry M. Gigliotti
Greater sage-grouse vital rates after wildfire Greater sage-grouse vital rates after wildfire
Greater sage-grouse (Centrocercus urophasianus) have been subject to long-term and continuing declines in population and habitat since European settlement of western North America. Increased wildfire activity constitutes a primary threat to the species in western portions of their range, with documented declines in wildfire-affected populations. Following a 187,000-ha wildfire in...
Authors
Lee J. Foster, Katie M. Dugger, C.A. Hagen, David A. Budeau
Toward a resilience-based conservation strategy for wetlands in Puerto Rico: Meeting challenges posed by environmental change Toward a resilience-based conservation strategy for wetlands in Puerto Rico: Meeting challenges posed by environmental change
Designing conservation strategies in human-dominated landscapes is challenging, owing to complex human-natural systems and evolving societal values. To meet this challenge, a robust, adaptive strategy should have a process for flexible implementation of incremental actions. We describe a hypothetical example for the Rio Grande de Arecibo watershed and coastal wetlands in Puerto Rico to...
Authors
Jaime A. Collazo, Adam J. Terando, Augustin C. Engman, P. F. Fackler, Thomas J. Kwak
Evaluation of a field protocol for internally-tagging fish predators using difficult-to-tag ictalurid catfish as examples Evaluation of a field protocol for internally-tagging fish predators using difficult-to-tag ictalurid catfish as examples
Tagging protocols that result in high tag retention will benefit fisheries professionals who use telemetry data. Ictalurid catfish historically have had very poor telemetry tag retention. Here, we use these difficult-to-tag taxa to address two research objectives. First, we evaluated our field-based internal tagging methodology by quantifying six tag retention metrics using data from 48
Authors
Kayla M. Gerber, Martha E. Mather, Joseph M. Smith, Zachary J. Peterson
Dynamic occupancy modeling of temperate marine fish in area-based closures Dynamic occupancy modeling of temperate marine fish in area-based closures
Species distribution models (SDMs) are commonly used to model the spatial structure of species in the marine environment, however, most fail to account for detectability of the target species. This can result in underestimates of occupancy, where nondetection is conflated with absence. The site occupancy model (SOM) overcomes this failure by treating occupancy as a latent variable of the...
Authors
Jay Calvert, Chris McGonigle, Suresh Sethi, Bradley Harris, Rory Quinn, Jon Grabowski
Segmentation of Mississippi’s natural and artificial lakes Segmentation of Mississippi’s natural and artificial lakes
Segmentations divide a diverse resource into groups, or segments, based on distinctive attributes that may respond similarly to management actions. A 4-way segmentation based on lake origin (natural or artificial) and size (small or large) was constructed for Mississippi lakes using a 30 yr data set. We aimed to document elements distinguishing these segments to understand relationships...
Authors
Leandro E. Miranda, L. A. Bull, M.E. Colvin, W.D. Hubbard, L.L. Pugh
A method to detect discontinuities in census data A method to detect discontinuities in census data
The distribution of pattern across scales has predictive power in the analysis of complex systems. Discontinuity approaches remain a fruitful avenue of research in the quest for quantitative measures of resilience because discontinuity analysis provides an objective means of identifying scales in complex systems and facilitates delineation of hierarchical patterns in processes, structure...
Authors
C. Barichievy, D. G. Angeler, T. N. Eason, A. S. Garmestani, K.L. Nash, C.A. Stow, S. Sundstrom, Craig R. Allen
Assessing wild juvenile trout ecology in the lower Mountain Fork Assessing wild juvenile trout ecology in the lower Mountain Fork
Reservoir tailwaters can be valuable fisheries for Rainbow Trout (Oncorhynchus mykiss), which is commonly stocked as mitigation for the altered habitat because it performs well as a put-and-take species in these thermally depressed systems. These fisheries are usually sustained by stocking due to flow fluctuations and lack of suitable spawning habitat that may limit natural reproduction...
Authors
James M. Long, W. W. Hoback, M. L. Reed, Tyler Farling