Ecosystems

Publications

Filter Total Items: 38,566
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Year Published: 2021

The application of metacommunity theory to the management of riverine ecosystems

River managers strive to use the best available science to sustain biodiversity and ecosystem function. To achieve this goal requires consideration of processes at different scales. Metacommunity theory describes how multiple species from different communities potentially interact with local-scale environmental drivers to influence population...

Patrick, Christopher J.; Anderson, Kurt E.; Brown, Brown L.; Hawkins, Charles P.; Metcalfe, Anya; Saffarinia, Parsa; Siqueira, Tadeu; Swan, Christopher M.; Tonkin, Jonathan D.; Yuan, Lester L.

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Year Published: 2021

Intraspecific variation mediates density dependence in a genetically diverse plant species

Interactions between neighboring plants are critical for biodiversity maintenance in plant populations and communities. Intraspecific trait variation and genome duplication are common in plant species and can drive eco-evolutionary dynamics through genotype-mediated plant–plant interactions. However, few studies have examined how species-wide...

Zaiats, Andrii; Germino, Matthew; Serpe, Marcelo D; Richardson, Bryce; Caughlin, Trevor

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Year Published: 2021

Pedigree accumulation analysis: Combining methods from community ecology and population genetics for breeding adult estimation

Estimates of the number of successfully breeding adults (NS) in a population can predict levels of recruitment. However, assessments of NS are often difficult to obtain because encounters with adults are limited due to life-history characteristics, low abundance or other constraints associated with access to critical habitats....

Sard, Nicholas; Hunter, Robert D.; Roseman, Edward F.; Daniel B. Hayes; DeBruyne, Robin L .; Scribner, Kim T

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Year Published: 2021

A protocol for modelling generalised biological responses using latent variables in structural equation models

In this paper we consider the problem of how to quantitatively characterize the degree to which a study object exhibits a generalized response. By generalized response, we mean a multivariate response where numerous individual properties change in concerted fashion due to some internal integration. In latent variable structural equation modeling (...

Akomolafe, Gbenga; Grace, James; Steiner, Magdalena

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Year Published: 2021

Instrumental variable methods in structural equation models

Instrumental variable regression (RegIV) provides a means for detecting and correcting parameter bias in causal models. Widely used in economics, recently several papers have highlighted its potential utility for ecological applications. Little attention has thus far been paid to the fact that IV methods can also be implemented within structural...

Morrissey, Michael; Grace, James

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Year Published: 2021

Conservation of Northwestern and Southwestern pond turtles: Threats, population size estimates, and population viability analysis

Accurate status assessments of long-lived, widely distributed taxa depend on the availability of long-term monitoring data from multiple populations. However, monitoring populations across large temporal and spatial scales is often beyond the scope of any one researcher or research group. Consequently, wildlife managers may be tasked with...

Manzo, Stephanie; Nicholson, E. Griffin; Devereux. Zachary; Fisher, R. N.; Brown, Christopher W.; Scott, Peter A; Shaffer, H. Bradley

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Year Published: 2021

How to increase the supply of native seed to improve restoration success: The US native seed development process

With the United Nations Decade on Ecosystem Restoration, restoration of damaged ecosystems is turning into a global movement. Restoration actions that are not based on science and an understanding of ecosystem function can thwart desired restoration outcomes at best and cause further damage to ecosystems at worst. Restoration often includes...

Mccormick, Molly Lutisha; Carr, Amanda N.; Massatti, Robert; Winkler, Daniel E.; De Angelis, Patricia; Olwell, Peggy

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Year Published: 2021

Contemporary and historic dynamics of lake whitefish (Coregonus clupeaformis) eggs, larvae, and juveniles suggest recruitment bottleneck during first growing season

To determine if a survival bottleneck occurs in Lake Erie's lake whitefish (Coregonus clupeaformis) population and explore possible mechanisms responsible, we examined contemporary and historical dynamics of lake whitefish eggs, larvae and juveniles. Widespread spawning and low overwinter egg retention were observed in 2016–2018, however...

Amidon, Z.; DeBruyne, R.; Roseman, Edward F.; Mayer, Christine

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Year Published: 2021

Extreme precipitation and flooding contribute to sudden vegetation dieback in a coastal salt marsh

Climate extremes are becoming more frequent with global climate change and have the potential to cause major ecological regime shifts. Along the northern Gulf of Mexico, a coastal wetland in Texas suffered sudden vegetation dieback following an extreme precipitation and flooding event associated with Hurricane Harvey in 2017. Historical salt marsh...

Stagg, Camille; Osland, Michael; Moon, Jena A.; Feher, Laura; Laurenzano, Claudia; Lane, Tiffany C.; Jones, William; Hartley, Stephen

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Year Published: 2021

Demographic modeling informs functional connectivity and management interventions in Graham’s beardtongue

Functional connectivity (i.e., the movement of individuals across a landscape) is essential for the maintenance of genetic variation and persistence of rare species. However, illuminating the processes influencing functional connectivity and ultimately translating this knowledge into management practice remains a fundamental challenge. Here, we...

Jones, Matthew Richard; Winkler, Daniel E.; Massatti, Robert

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Year Published: 2021

Simulated effects of sea-level rise on the shallow, fresh groundwater system of Assateague Island, Maryland and Virginia

The U.S. Geological Survey, in cooperation with the National Park Service, developed a three-dimensional groundwater-flow model for Assateague Island in eastern Maryland and Virginia to assess the effects of sea-level rise on the groundwater system. Sea-level rise is expected to increase the altitude of the water table in barrier island aquifer...

Fleming, Brandon J.; Raffensperger, Jeff P.; Goodling, Phillip J.; Masterson, John P.
Fleming, B.J., Raffensperger, J.P., Goodling, P.J., and Masterson, J., 2021, Simulated effects of sea-level rise on the shallow, fresh groundwater system of Assateague Island, Maryland and Virginia: U.S. Geological Survey Scientific Investigations Report 2020–5104, 62 p., https://doi.org/10.3133/sir20205104.

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Year Published: 2021

Growth of greater white-fronted goose goslings relates to population dynamics at multiple scales

The abundance of greater white-fronted geese (Anser albifrons frontalis) on the Arctic Coastal Plain (ACP) of northern Alaska, USA, has more than tripled since the late 1990s; however, recent rate of annual population growth has declined as population size increased, which may indicate white-fronted geese on the ACP are approaching carrying...

Fondell, Thomas F; Meixell, Brandt W.; Flint, Paul L.