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Year Published: 2018

Climatically driven changes in primary production propagate through trophic levels

Climate and land‐use change are the major drivers of global biodiversity loss. Their effects are particularly acute for wide‐ranging consumers, but little is known about how these factors interact to affect the abundance of large carnivores and their herbivore prey. We analyzed population densities of a primary and secondary consumer (mule deer,...

Stoner, David C.; Sexton, Joseph O.; Choate, David M.; Nagol, Jyothy; Bernales, Heather H.; Sims, Steven A.; Ironside, Kirsten E.; Longshore, Kathleen M.; Edwards, Thomas C.
Stoner, D.C., Sexton, J.O., Choate, D.M., Nagol, J., Bernales, H.H., Sims, S.A., Ironside, K.E., Longshore, K.M., and Edwards Jr., T.C., 2018, Climatically driven changes in primary production propagate through trophic levels: Global Change Biology, online, https://doi.org/10.1111/gcb.14364.

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Year Published: 2018

Impacts of tidal road-stream crossings on aquatic organism passage

ivers and streams are highly vulnerable to fragmentation from roads due to their prevalence in the landscape. Road-stream crossings are far more numerous than other anthropogenic barriers such as dams; these crossing structures (culverts, bridges, fords, and tide gates) have been demonstrated to impede the passage of aquatic organisms. However,...

Becker, Sarah; Jackson, Scott; Jordaan, Adrian; Roy, Allison

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Year Published: 2018

Conservation Tools and Strategies

Walters, Jeffrey R.; Kesler, Dylan C.; Webb, Elisabeth B.

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Year Published: 2018

Arctic and boreal carbon

This chapter summarizes the current knowledge in high-latitude (mostly permafrost) carbon storage and dynamics. Arctic and boreal regions contain large carbon stock, especially in permafrost soils. The factors that control carbon storage have been changing rapidly over the last several decades. As a result, this large carbon pool is highly...

Schuur, Ted; McGuire, A. David; Romanovsky, Vladimir E.; Schadel, Christina; Mack, Michelle

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Year Published: 2018

Burrowing owls: Happy urbanite or disgruntled tenant?

No abstract available.

Boal, Clint W.; Dykstra, Cheryl R.; Conway, Courtney J.

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Year Published: 2018

Assessing historical and projected carbon balance of Alaska: A synthesis of results and policy/management implications

We summarize the results of a recent interagency assessment of land carbon dynamics in Alaska, in which carbon dynamics were estimated for all major terrestrial and aquatic ecosystems for the historical period (1950–2009) and a projection period (2010–2099). Between 1950 and 2009, upland and wetland (i.e., terrestrial) ecosystems of the state...

McGuire, A. David; Genet, Hélène; Lyu, Zhou; Pastick, Neal J.; Stackpoole, Sarah M.; Birdsey, Richard; D'Amore, David; He, Yujie; Rupp, T. Scott; Striegl, Robert G.; Wylie, Bruce K.; Zhou, Xiaoping; Zhuang, Qianlai; Zhu, Zhiliang

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Year Published: 2018

Fitness consequences of interspecific nesting associations among cavity-nesting birds

Interspecific aggregations of prey may provide benefits by mitigating predation risk, but they can also create costs if they increase competition for resources or are more easily detectable by predators. Variation in predation risk and resource availability may influence the occurrence and fitness effects of aggregating in nature. Yet tests of...

Mouton, James C.; Martin, Thomas E.

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Year Published: 2018

Long-term spotlight surveys of American alligators in Mississippi, USA

Accurate population estimates and assessments of trajectory are an essential part of harvest management for game species and conservation action plans for protected species. Long-term monitoring can lead to ecological understanding by identifying biotic and abiotic drivers of population dynamics. Spotlight surveys are a widely used method to...

Strickland, Bradley A.; Vilella, Francisco; Flynt, Ricky D.

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Year Published: 2018

What is the value of wild bee pollination for wild blueberries and cranberries, and who values it?

Pollinator conservation efforts and growing interest in wild bee pollination have increased markedly in the last decade, making it increasingly important to have clear and practical estimates of the value of pollinators to agriculture. We used agricultural statistics, socio-economic producer surveys, and agronomic field research data to estimate...

Hoshide, Aaron K.; Drummond, Francis A.; Stevens, Thomas H.; Venturini, Eric M.; Hanes, Samuel P.; Sylvia, Martha M.; Loftin, Cynthia S.; Yarborough, David E.; Averill, Anne L.

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Year Published: 2018

Evaluation of key scientific issues in the report, “State of the mountain lion—A call to end trophy hunting of America’s lion”

In their recently published report, State of the Mountain Lion: A Call to End Trophy Hunting of America’s Lion, the Humane Society of the United States suggested that mountain lion (Puma concolor) hunting should be abolished in the United States. The report claims this recommendation is based on scientific arguments that demonstrate the...

Cain, James W.; Mitchell, Michael S.
Cain, J.W., III, and Mitchell, M.S., 2018, Evaluation of key scientific issues in the report, “State of the mountain lion—A call to end trophy hunting of America’s lion”: U.S. Geological Survey Open-File Report 2018-1128, 14 p., https://doi.org/10.3133/ofr20181128.

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Year Published: 2018

Forecasting effects of angler harvest and climate change on smallmouth bass abundance at the southern edge of their range

Climate change will affect stream systems in numerous ways over the coming century. Globally, streams are expected to experience changes in temperature and flow regime. Previous work has indicated that these changes will likely affect fish distributions, but little work has been conducted examining population level effects of climate change on...

Middaugh, Christopher R.; Magoulick, Daniel D.

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Year Published: 2018

An individual-based model for predicting dynamics of a newly established Mexican wolf (Canis lupus baileyi) population—Final report

Project SummaryThe Mexican wolf recovery team proposed to establish other populations of Mexican wolves (Canis lupus baileyi) in the Southwest (U.S. Fish and Wildlife Service, 1982). We were tasked to conduct an extensive simulation modeling exercise to determine release strategies (in conjunction with management actions) that best predict...

Gedir, Jay V.; Cain, James W.
Gedir, J.V., and Cain, J.W., III, 2018, An individual-based model for predicting dynamics of a newly established Mexican wolf (Canis lupus baileyi) population—Final report: U.S. Geological Survey Open-File Report 2018-1126, 16 p., https://doi.org/10.3133/ofr20181126.