Ecosystems

Publications

Filter Total Items: 38,566
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Year Published: 2021

Evaluation of a “trace” plant density score in LTRM vegetation monitoring

The Long Term Resource Monitoring (LTRM) element of the Upper Mississippi River Restoration program employs a harvest method for sampling submersed aquatic vegetation (SAV) whereby a rake is dragged ~1.5 m over the substrate and plant materials are retrieved.  “Plant density” (PD) scores indicate SAV abundance and are based on the amount of...

Lowenberg, Carol; Drake, Deanne C.; Lund, Eric; Bales, Kyle

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Year Published: 2021

Ontogeny of eDNA shedding during early development in Chinook Salmon (Oncorhynchus tshawytscha)

Knowledge of the timing of major life history events in aquatic species is important for informing conservation and resource management planning. Accordingly, surveys of environmental DNA (eDNA) have been performed to determine the efficacy of eDNA for providing information on life history events, primarily focusing on the timing of events...

Ostberg, Carl; Chase, Dorothy M.

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Year Published: 2021

Evaluation of satellite imagery for monitoring Pacific walruses at a large coastal haulout

Pacific walruses (Odobenus rosmarus divergens) are using coastal haulouts in the Chukchi Sea more often and in larger numbers to rest between foraging bouts in late summer and autumn in recent years, because climate warming has reduced availability of sea ice that historically had provided resting platforms near their preferred benthic feeding...

Fischbach, Anthony S.; Douglas, David C.

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Year Published: 2021

Protocol for route restoration in California’s desert renewable energy conservation plan area

In the deserts of the Southwestern United States, increased off-highway vehicle use can lead to widespread vehicular damage to desert ecosystems. As the popularity and intensity of vehicle use on public lands continues, the Bureau of Land Management (BLM) is challenged to manage the routes used by recreationists while minimizing activity beyond...

Esque, Todd C.; Jackson, Ka-Voka R.; Rice, Alexandrea M.; Childers, Jeffery K.; Woods, Caroline S.; Fesnock-Parker, Amy; Johnson, Andrew C.; Price, Lauren J.; Forgrave, Kristin E.; Scoles-Sciulla, Sara J.; DeFalco, Lesley A.
Esque, T.C., Jackson, K.R., Rice, A.M., Childers, J.K., Woods, C.S., Fesnock-Parker, A., Johnson, A.C., Price, L.J., Forgrave, K.E., Scoles-Sciulla, S.J., and DeFalco, L.A., 2021, Protocol for route restoration in California’s desert renewable energy conservation plan area: U.S. Geological Survey Techniques and Methods 2-A17, 60 p., https://doi.org/10.3133/tm2A17.

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Year Published: 2021

Biodiversity–productivity relationships in a natural grassland community vary under diversity loss scenarios

Understanding the biodiversity–productivity relationship and underlying mechanisms in natural ecosystems under realistic diversity loss scenarios remains a major challenge for ecologists despite its importance for predicting impacts of rapid loss of biodiversity worldwide. Here we report the results of a plant functional group (PFG) removal...

Pan, Qingmin; Symstad, Amy; Bai, Yongfei; Huang, Jianhui; Wu, Jianguo; Naeem, Shahid; Chen, Dima; Tian, Dashuan; Wang, Qibing; Han, Xingguo

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Year Published: 2021

A greener future for the Galapagos: Forecasting ecosystem productivity by finding climate analogs in time

Forecasting ecosystem response to climate change is critical for guiding policymaking but challenging due to: complicated relationships between microclimates and regional climates; species’ responses that are driven by extremes rather than averages; the multifaceted nature of species’ interactions; and the lack of historical analogs to future...

Browning, Dawn M; Charney, Noah D.; Bastille-Rousseau, Guillaume; Yackulic, Charles; Blake, Stephen; Gibbs, James P.

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Year Published: 2021

Challenges in updating habitat suitability models: An example with the lesser prairie-chicken

Habitat loss from land-use change is one of the top causes of declines in wildlife species of concern. As such, it is critical to assess and reassess habitat suitability as land cover and anthropogenic features change for both monitoring and developing current information to inform management decisions. However, there are obstacles that must be...

Jarnevich, Catherine S.; Belamaric, Pairsa Nicole; Fricke, Kent; Houts, Mike; Rossi, Liza; Beauprez, Grant M.; Cooper, Brett; Martin, Russell

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Year Published: 2021

Incorporation of uncertainty to improve projections of tidal wetland elevation and carbon accumulation with sea-level rise

Understanding the rates and patterns of tidal wetland elevation changes relative to sea-level is essential for understanding the extent of potential wetland loss over the coming years. Using an enhanced and more flexible modeling framework of an ecosystem model (WARMER-2), we explored sea-level rise (SLR) impacts on wetland elevations and carbon...

Buffington, Kevin J.; Janousek, Christopher N.; Dugger, Bruce D.; Callaway, John C.; Schile-Beers, Lisa; Sloane, Evyan Borgnis; Thorne, Karen M.

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Year Published: 2021

From site to system: Approaches for producing system-wide estimates of fish habitat in large rivers

Worldwide, many productive rivers are dam-regulated and rely on flow management strategies that must balance support of ecological processes with human water use. One component of evaluating this balance is to understand ecological consequences of alternative flow management strategies, which has often been accomplished by coupling population...

Robinson, H.E.; Henderson, Mark J.; Perry, Russell; Goodman, Damon H.; Som, Nicholas A.

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Year Published: 2021

Acute mortality in California tiger salamander (Ambystoma californiense) and Santa Cruz long-toed salamander (Ambystoma macrodactylum croceum) caused by Ribeiroia ondatrae (Class: Trematoda)

In early September 2019, a morbidity and mortality event affecting California tiger salamanders (Ambystoma californiense) and Santa Cruz long-toed salamanders (Ambystoma macrodactylum croceum) in late stages of metamorphosis was reported at a National Wildlife Refuge in Santa Cruz County, California, U.S.A. During the postmortem disease...

Keller, Saskia; Roderick, Constance; Caris, Christopher; Grear, Daniel A.; Cole, Rebecca A.

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Year Published: 2021

The effects of ENSO and the North American monsoon on mast seeding in two Rocky Mountain conifer species

We aimed to disentangle the patterns of synchronous and variable cone production (i.e. masting) and its relationship to climate in two conifer species native to dry forests of western North America. We used cone abscission scars to reconstruct ca 15 years of recent cone production in Pinus edulis and Pinus ponderosa, and...

Wion, Andreas; Pearse, Ian; Rodman, Kyle C; Veblen, Thomas T; Redmond, Miranda

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Year Published: 2021

The ecology and evolution of synchronized reproduction in long-lived plants

Populations of many long-lived plants exhibit spatially synchronized seed production that varies extensively over time, so that seed production in some years is much higher than on average, while in others, it is much lower or absent. This phenomenon termed masting or mast seeding has important consequences for plant...

Pesendorfer, Mario B.; Ascoli, Davide; Bogdziewicz, Michal; Hacket-Pain, Andrew; Pearse, Ian; Vacchiano, Giorgio