Ecosystems

Publications

Filter Total Items: 38,566
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Year Published: 2021

Small shorebirds feast on green slime to fuel their long migration

Shorebirds wade in shallow waters along shorelines searching for food. More than a million shorebirds visit the San Francisco Estuary each year during their migration to feast on the insects, worms, clams, and crabs that live on or under the surface of the sand or mud. The abundant food in the Estuary provides shorebirds with the energy they need...

Hall, Laurie Anne; De La Cruz, Susan E. W.; Woo, Isa; Kuwae, Tomohiro; Nelson, David Mcgovern; Takekawa, John Y.

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Year Published: 2021

Environmental DNA surveys of Burmese pythons in the Greater Everglades Ecosystem

Improving the probability of detecting invasive giant snakes is vital for the management of emerging or established populations. Burmese pythons occupy thousands of square kilometers of mostly inaccessible habitats in Florida. Environmental DNA (eDNA) methods have been shown to be time and cost effective in a number of systems and may be...

Beaver, Caitlin E.; Meigs-Friend, Gaia; Hunter, Margaret E.
Beaver, C.E., Meigs-Friend, G., and Hunter, M.E., 2021, Environmental DNA surveys of Burmese pythons in the Greater Everglades Ecosystem: U.S. Geological Survey Open-File Report 2021–1082, 17 p., https://doi.org/10.3133/ofr20211082.

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Year Published: 2021

Enhancing marsh elevation using sediment augmentation: A case study from southern California, USA

Tidal marshes are an important component of estuaries that provide habitat for fish and wildlife, protection from flooding, recreation opportunities, and can improve water quality. Critical to maintaining these functions is vertical accretion, a key mechanism by which tidal marshes build elevation relative to local sea level. The beneficial use of...

Sloane, Evyan Borgnis; Thorne, Karen M.; Whitcraft, Christine R; Touchstone, Victoria

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Year Published: 2021

Tree mortality response to drought-density interactions suggests opportunities to enhance drought resistance

The future of dry forests around the world is uncertain given predictions that rising temperatures and enhanced aridity will increase drought-induced tree mortality. Using forest management and ecological restoration to reduce density and competition for water offers one of the few pathways that forests managers can potentially minimize drought-...

Bradford, John; Shriver, Robert K; Robles, Marcos D.; McCauley, Lisa A; Andrews, Caitlin M.; Crimmins, Michael A.; Bell, David M.

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Year Published: 2021

Editorial: Environmental DNA innovations for conservation

Environmental DNA (eDNA) analysis refers to the collection of bulk environmental samples such as water, sediment, or air, and studying the genetic remnants that organisms have shed into their environment to gain information about species presence.

Barnes, Matthew A; Klymus, Katy E.; Yamanaka, Hiroki

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Year Published: 2021

Behavior and movement of smallmouth bass (Micropterus dolomieu) in the forebay of Bonneville Dam, Columbia River, August–December 2020

A telemetry study was conducted during August–December 2020 to evaluate behavior and movement patterns of adult smallmouth bass (Micropterus dolomieu) in the forebay of Bonneville Dam, Washington. A total of 40 smallmouth bass were collected, tagged, and released during August–September in seven distinct areas of the dam forebay and monitored...

Kock, Tobias J.; Hansen, Gabriel S.; Evans, Scott D.
Kock, T.J., Hansen, G.S., and Evans, S.D., 2021, Behavior and movement of smallmouth bass (Micropterus dolomieu) in the forebay of Bonneville Dam, Columbia River, August–December 2020: U.S. Geological Survey Open-File Report 2021–1099, 13 p., https://doi.org/10.3133/ofr20211099.

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Year Published: 2021

Rapid embryonic development supports the early onset of gill functions in two coral reef damselfishes

The gill is one of the most important organs for growth and survival of fishes. Early life stages in coral reef fishes often exhibit extreme physiological and demographic characteristics that are linked to well-established respiratory and ionoregulatory processes. However, gill development and function in coral reef fishes is not well-understood....

Prescott, LA; Regish, Amy M.; McMahon, SJ; McCormick, Stephen D.; Rummer, JL

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Year Published: 2021

Invasive black carp as a reservoir host for the freshwater mollusk parasite Aspidogaster conchicola: Further evidence of mollusk consumption and implications for parasite dispersal

Black Carp (Mylopharyngodon piceus) has invaded the Mississippi River and is a potential threat to native mollusks. During prior diet research, we discovered that the fluke Aspidogaster conchicola, a mollusk parasite, occurs regularly in the gastrointestinal tract of Black Carp. The fluke remains in fish intestines for extended periods after...

Poulton, Barry C.; Bailey, Jennifer; Kroboth, Patrick; George, Amy E.; Chapman, Duane C.

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Year Published: 2021

Telemetry reveals migratory drivers and disparate space use across seasons and age-groups in American horseshoe crabs

Identifying mechanisms that underpin animal migration patterns and examining variability in space use within populations is crucial for understanding population dynamics and management implications. In this study, we quantified the migration rates, seasonal changes in migratory connectivity, and residency across population demographics (age and...

Bopp, Justin J.; Sclafani, Matthew; Frisk, Michael G.; McKown, Kim; Zeigler, Catherine; Smith, David R.; Cerrato, Robert

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Year Published: 2021

Sustaining transmission in different host species: The emblematic case of Sarcoptes scabiei

Some pathogens sustain transmission in multiple different host species, but how this epidemiologically important feat is achieved remains enigmatic. Sarcoptes scabiei is among the most host generalist and successful of mammalian parasites. We synthesize pathogen and host traits that mediate sustained transmission and present cases illustrating...

Browne, E; Driessen, MM; Cross, Paul; Escobar, L. E.; Foley, Janet E.; López-Olvera, JR; Niedringhaus, KD; Rossi, Liza; Carver, Scott

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Year Published: 2021

Effects of sea ice decline and summer land use on polar bear home range size in the Beaufort Sea

Animals responding to habitat loss and fragmentation may increase their home ranges to offset declines in localized resources or they may decrease their home ranges and switch to alternative resources. In many regions of the Arctic, polar bears (Ursus maritimus) exhibit some of the largest home ranges of any quadrupedal mammal. Polar bears are...

Pagano, Anthony M.; Durner, George M.; Atwood, Todd C.; Douglas, David C.

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Year Published: 2021

The effects of management practices on grassland birds—Grasshopper Sparrow (Ammodramus savannarum)

The key to Grasshopper Sparrow (Ammodramus savannarum) management is providing large areas of contiguous grassland of intermediate height with moderately deep litter and low shrub density. Grasshopper Sparrows have been reported to use habitats with 8–166 centimeters (cm) average vegetation height, 4–80 cm visual obstruction reading, 12–95 percent...

Shaffer, Jill A.; Igl, Lawrence D.; Johnson, Douglas H.; Sondreal, Marriah L.; Goldade, Christopher M.; Nenneman, Melvin P.; Wooten, Travis L.; Euliss, Betty R.
Shaffer, J.A., Igl, L.D., Johnson, D.H., Sondreal, M.L., Goldade, C.M., Nenneman, M.P., Wooten, T.L., and Euliss, B.R., 2021, The effects of management practices on grassland birds—Grasshopper Sparrow (Ammodramus savannarum), chap. GG of Johnson, D.H., Igl, L.D., Shaffer, J.A., and DeLong, J.P., eds., The effects of management practices on grassland birds: U.S. Geological Survey Professional Paper 1842, 57 p., https://doi.org/10.3133/pp1842GG.