Ecosystems

Publications

Filter Total Items: 38,570
Publication Thumbnail
Year Published: 2021

Engaging with stakeholders to produce actionable science: A framework and guidance

Natural and cultural resource managers are increasingly working with the scientific community to create information on how best to adapt to the current and projected impacts of climate change. Engaging with these managers is a strategy that researchers can use to ensure that scientific outputs and findings are actionable (or useful and usable). In...

Bamzai, Aparna; Cravens, Amanda E.; Wade, Alisa; McPherson, Renee A.

Publication Thumbnail
Year Published: 2021

Integrating airborne and mobile lidar data with UAV photogrammetry for rapid assessment of changing forest snow depth and cover

Forest structure and topography can influence the ecohydrologic function and resiliency to drought and changing climate. It is, therefore, important to understand how forest restoration treatments alter snowpack distribution and design the treatments accordingly. We use a combination of aerial lidar, multi-temporal terrestrial...

Donager, Jonathon; Sankey, Temuulen; Sanchez-Meador, Andrew; Sankey, Joel B.; Springer, Abraham E.

Publication Thumbnail
Year Published: 2021

A new species of Helianthus (Asteracae) from Clark County, Nevada

Helianthus devernii T.M.Draper is described as a new endemic species from two small desert spring populations found within Red Rock Canyon National Conservation Area, Clark County, NV. Morphological data and nuclear ribosomal ITS marker data place it in section Ciliares series Pumili. Furthermore, the molecular data allies it...

Draper, Trent M; Esque, Todd C.

Publication Thumbnail
Year Published: 2021

Kelp forest monitoring at Naval Base Ventura County, San Nicolas Island, California—Fall 2019, sixth annual repor

The U.S. Geological Survey conducts ecological monitoring of rocky subtidal communities at four permanent sites around San Nicolas Island. The sites—Nav Fac 100, West End, Dutch Harbor, and Daytona 100—were based on ones that had been monitored since 1980 by the U.S. Geological Survey and, in cooperation with the U.S. Navy, were combined or...

Kenner, Michael C.; Tomoleoni, Joseph
Kenner, M.C., and Tomoleoni, J., 2021, Kelp forest monitoring at Naval Base Ventura County, San Nicolas Island, California—Fall 2019, sixth annual report: U.S. Geological Survey Open-File Report 2021–1081, 97 p., https://doi.org/10.3133/ofr20211081.

Publication Thumbnail
Year Published: 2021

Forest resistance to extended drought enhanced by prescribed fire in low elevation forests of the Sierra Nevada

Prescribed fire reduces fire hazards by removing dead and live fuels (small trees and shrubs). Reductions in forest density following prescribed fire treatments (often in concert with mechanical treatments) may also lessen competition so that residual trees might be more likely to survive when confronted with additional stressors, such as drought...

van Mantgem, Phillip J.; Caprio, Anthony C.; Stephenson, Nathan L.; Das, Adrian

Publication Thumbnail
Year Published: 2021

Could climate change benefit invasive snakes? Modelling the potential distribution of the California Kingsnake in the Canary Islands

The interaction between climate change and biological invasions is a global conservation challenge with major consequences for invasive species management. However, our understanding of this interaction has substantial knowledge gaps; this is particularly relevant for invasive snakes on islands because they can be a serious threat to island...

Piquet, Julien C; Warren, Dan L; Bolaños, Jorge Fernando Saavedra; Rivero, José Miguel Sánchez; Gallo-Barneto, Ramón; Cabrera-Pérez, Miguel Ángel; Fisher, R. N.; Fisher, Sam R; Rochester, Carlton J.; Hinds, Brian; Nogales, Manuel; López-Darias, Marta

Publication Thumbnail
Year Published: 2021

An eddy-resolving numerical model to study turbulent flow, sediment and bed evolution using detached eddy simulation in a lateral separation zone at the field-scale

Turbulence-resolving simulations elucidate key elements of fluid dynamics and sediment transport in fluvial environments. This research presents a feasible strategy for applying state-of-the-art computational fluid mechanics to the study of sediment transport and morphodynamic processes in lateral separation zones, which are common features in...

Alvarez, Laura V.; Grams, Paul

Publication Thumbnail
Year Published: 2021

Analysis of Escherichia coli, total recoverable iron, and dissolved selenium concentrations, loading, and identifying data gaps for selected 303(d) listed streams, Grand Valley, western Colorado, 1980–2018

Tributaries to the Colorado River in the Grand Valley in western Colorado (segment COLCLC13b) have been placed on the State of Colorado 303(d) list as impaired for Escherichia coli (E. coli), total recoverable iron, and dissolved selenium. The Colorado Department of Public Health and Environment Water Quality Control Division is required to...

Miller, Lisa D.; Gidley, Rachel G.; Day, Natalie K.; Thomas, Judith C.
Miller, L.D., Gidley, R.G., Day, N.K., and Thomas, J.C., 2021, Analysis of Escherichia coli, total recoverable iron, and dissolved selenium concentrations, loading, and identifying data gaps for selected 303(d) listed streams, Grand Valley, western Colorado, 1980–2018 (ver. 1.1, September 2021): U.S. Geological Survey Scientific Investigations Report 2021-5053, 37 p., https://doi.org/10.3133/sir20215053.

Publication Thumbnail
Year Published: 2021

Integrating seabird dietary and groundfish stock assessment data: Can puffins predict pollock spawning stock biomass in the North Pacific?

Information on the annual variability in abundance and growth of juvenile groundfish can be useful for predicting fisheries stocks, but is often poorly known owing to difficulties in sampling fish in their first year of life. In the Western Gulf of Alaska (WGoA) and Eastern Bering Sea (EBS) ecosystems, three species of puffin (tufted and horned...

Sydeman, William J.; Thompson, Sarah Ann; Piatt, John F.; Zador, Stephani; Dorn, Martin W.

Publication Thumbnail
Year Published: 2021

First record of Najas marina (Hydrocharitaceae) for Montana and an update on the North American distribution

Three recent collections of Najas marina (spiny water-nymph) from Missoula County, Montana are documented and illustrated. These collections are the first records for Montana and for the Pacific Northwest region. The occurrence of N. marina in Montana reflects a significant northward expansion of this species in the Mountain West. The North...

Freeman, Scott L.; Pfingsten, Ian

Publication Thumbnail
Year Published: 2021

Foraging behavior in a generalist snake (brown treesnake, Boiga irregularis) with implications for avian reintroduction and recovery

Broad foraging classifications, such as generalist or specialist forager, are generally beneficial for population management in defining expectations of typical behavior. However, better understanding as to how individual variance in behavior interfaces with management actions, such as control of an invasive predator (such as brown treesnakes;...

Nafus, Melia G.; Xiong, Peter X.; Paxton, Eben H.; Yackel Adams, Amy A.; Goetz, Scott Michael

Publication Thumbnail
Year Published: 2021

Understanding grass invasion, fire severity, and Acacia koa regeneration for forest restoration in Hawaiʻi Volcanoes National Park

With invasive grasses increasing wildfire occurrence worldwide, a better understanding of the relationships between native plants, fire, and invasive grass is needed to help restoration plans facilitate ecosystem resilience. Invasive grasses are particularly problematic for altering fire regimes in the tropics, yet in Hawaiʻi, restoration sites...

Natalia, Hamilton; Yelenik, Stephanie G.; Durboraw, Tara; Cox, Robert; Gill, Nathan S.