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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse more than 65,000 articles authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
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Climate change vulnerability of Arctic char across Scandinavia Climate change vulnerability of Arctic char across Scandinavia
Climate change is anticipated to cause species to shift their ranges upward and poleward, yet space for tracking suitable habitat conditions may be limited for range-restricted species at the highest elevations and latitudes of the globe. Consequently, range-restricted species inhabiting Arctic freshwater ecosystems, where global warming is most pronounced, face the challenge of coping...
Authors
Clint C. Muhlfeld, Timothy Cline, Anders Finstad, Dag O. Hessen, Sam Perrin, Jens Thaulow, Diane Whited, Leif Asbjorn Vollestad
Think regionally, act locally: Perspectives on co-design of spatial conservation prioritization tools and why end-user engagement altered our approach Think regionally, act locally: Perspectives on co-design of spatial conservation prioritization tools and why end-user engagement altered our approach
Coproduction represents an inclusive approach for developing decision-support resources because it seeks to integrate scientific knowledge and end-user needs. Unfortunately, spatial decision support systems (SDSS) coproduction has sometimes resulted in limited utility for end-users, partially due to scarce SDSS coproduction guidance. To initiate coproduction, we held a series of...
Authors
Nicholas J. Van Lanen, Jessica E. Shyvers, Bryan C. Tarbox, Adrian P. Monroe, Patrick J. Anderson, Daniel K. Jones, Katharine G. Dahm, Cameron L. Aldridge
Four decades of data indicate that planted mangroves stored up to 75% of the carbon stocks found in intact mature stands Four decades of data indicate that planted mangroves stored up to 75% of the carbon stocks found in intact mature stands
Mangroves’ ability to store carbon (C) has long been recognized, but little is known about whether planted mangroves can store C as efficiently as naturally established (i.e., intact) stands and in which time frame. Through Bayesian logistic models compiled from 40 years of data and built from 684 planted mangrove stands worldwide, we found that biomass C stock culminated at 71 to 73% to...
Authors
Carine F. Bourgeois, Richard A. MacKenzie, Sahadev Sharma, Rupesh K. Bhomia, Nels G. Johnson, Andre S. Rovai, Thomas A. Worthington, Ken Krauss, Kangkuso Analuddin, Jacob J. Bukoski, Jose Alan Castillo, Angie Elwin, Leah Glass, Tim C. Jennerjahn, Mwita M. Mangora, Cyril Marchand, Michael Osland, Ismael A. Ratefinjanahary, Raghab Ray, Severino G. Salmo, Sigit D. Sasmito, Rempei Suwa, Pham Hong Tinh, Carl C. Trettin
Effects of harmful algal blooms on amphibians and reptiles are under-reported and under-represented Effects of harmful algal blooms on amphibians and reptiles are under-reported and under-represented
Harmful algal blooms (HABs) are a persistent and increasing problem globally, yet we still have limited knowledge about how they affect wildlife. Although semi-aquatic and aquatic amphibians and reptiles have experienced large declines and occupy environments where HABs are increasingly problematic, their vulnerability to HABs remains unclear. To inform monitoring, management, and future...
Authors
Brian J. Halstead, Kelly Smalling, Blake R. Hossack
Histological analysis of deepwater sculpin ovaries supports single spawning reproductive strategy Histological analysis of deepwater sculpin ovaries supports single spawning reproductive strategy
Deepwater sculpin (Myoxocephalus thompsonii) were considered extirpated from Lake Ontario prior to the 1990s but have since resurged and are now an abundant offshore demersal species. As deepwater sculpin reproduction is poorly described, an investigation of their gonadal development and fecundity was conducted to better understand their reproductive biology. To evaluate spawning period...
Authors
Jarrod R. Ludwig, Brian Weidel, Brian O’Malley, Michael Connerton, Jacques Rinchard
Low-level dietary clothianidin exposure preferentially causes prepupal mortality of monarch butterflies (Danaus plexippus) Low-level dietary clothianidin exposure preferentially causes prepupal mortality of monarch butterflies (Danaus plexippus)
Data from prior research indicate the prepupal stage of the monarch butterfly life cycle is more sensitive to clothianidin exposure than the larval stage. A set of experiments was conducted to determine if the dietary clothianidin exposures that cause prepupal mortality are environmentally relevant. Monarch larvae were raised from egg to pupae on clothianidin-contaminated swamp milkweed...
Authors
Timothy Bargar
Rangewide occupancy of a flagship species, the Coastal California Gnatcatcher (Polioptila californica californica) in southern California: Habitat associations and recovery from wildfire Rangewide occupancy of a flagship species, the Coastal California Gnatcatcher (Polioptila californica californica) in southern California: Habitat associations and recovery from wildfire
The Coastal California Gnatcatcher (Polioptila californica californica), a federally threatened species, is a flagship species for regional conservation planning in southern California (USA). An inhabitant of coastal sage scrub vegetation, the gnatcatcher has declined in response to habitat loss and fragmentation, exacerbated by catastrophic wildfires. We documented the status of...
Authors
Barbara E. Kus, Kristine L. Preston, Alexandra Houston
Effect of water delivery and irrigation for riparian restoration in the Colorado River Delta, Mexico Effect of water delivery and irrigation for riparian restoration in the Colorado River Delta, Mexico
Along Mexico's arid Colorado River Delta, the riparian corridor lacks water due to a reduction in frequent flows, climate change, human infrastructure, and altered riparian landcover from disturbances to invasive species, fire, and high soil and water salinities, which have led to declines in riparian plant health in recent decades. Restoration efforts focusing on small plots have...
Authors
Pamela L. Nagler, Ibrahima Sall, Martha Gomez-Sapiens, Karl W. Flessa, Armando Barreto-Muñoz, Kamel Didan
Wood you believe it? Experimental addition of nonnative wood enhances instream habitat for native dryland fishes Wood you believe it? Experimental addition of nonnative wood enhances instream habitat for native dryland fishes
Flow alteration and riparian vegetation encroachment are causing habitat simplification with severe consequences for native fishes. To assess the effectiveness of enhancing simplified habitat in a large dryland river, we experimentally added invasive wood at 19 paired treatment and reference (no wood added) subreaches (50–100 m) within the main channel of the San Juan River. Using a...
Authors
Benjamin J. Miller, Mark C. McKinstry, Phaedra E. Budy, Casey A. Pennock
Isotopic evaluation of the National Water Model reveals missing agricultural irrigation contributions to streamflow across the western United States Isotopic evaluation of the National Water Model reveals missing agricultural irrigation contributions to streamflow across the western United States
The National Water Model (NWM) provides critical analyses and projections of streamflow that support water management decisions. However, the NWM performs poorly in lower-elevation rivers of the western United States (US). The accuracy of the NWM depends on the fidelity of the model inputs and the representation and calibration of model processes and water sources. To evaluate the NWM...
Authors
Annie L. Putman, Patrick C. Longley, Morgan C. McDonnell, James E. Reddy, Michelle P. Katoski, Olivia L. Miller, J. Renee Brooks
A fine-scale examination of parturition timing in temperate ungulates A fine-scale examination of parturition timing in temperate ungulates
Parturition timing has long been a topic of interest in ungulate research. However, few studies have examined parturition timing at fine scale (e.g.,
Authors
Matthew T. Turnley, Tabitha A. Hughes, Randy T. Larsen, Kent R. Hersey, Matthew S. Broadway, M. Colter Chitwood, W. Sue Fairbanks, Robert Charles Lonsinger, Brock R. McMillan
Persistence of pesticide residues in weathered avian droppings Persistence of pesticide residues in weathered avian droppings
Avian droppings (combination of fecal matter and urates) provide a non-lethal and non-invasive matrix for measuring pesticide exposures. In the field, droppings may be collected days or weeks after excretion and the persistence of pesticide residues in weathered droppings is not known. Thus, we studied the effects of weathering on pesticide residues in droppings. Domestic chicken (Gallus...
Authors
Nimish B. Vyas, Paula F. P. Henry, Lukasz Binkowski, Michelle L. Hladik, Michael S. Gross, Michael A. Schroeder, Dawn M. Davis