Unified Interior Regions

Region 2: South Atlantic-Gulf (Includes Puerto Rico and the U.S. Virgin Islands)

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Filter Total Items: 5,248
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Year Published: 2019

The shifting saltmarsh-mangrove ecotone in Australasia and the Americas

Mangroves and saltmarshes coexist in the intertidal wetlands of many temperate and subtropical coastlines. In these settings, mangroves may be close to physiological limits of tolerance in relation to a range of environmental variables, including temperature, salinity, aridity, and inundation frequency. Changes in the distribution of mangrove and...

Saintilan, Neil; Rogers, Kerrylee; McKee, Karen L.

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Year Published: 2019

Recent outer-shelf foraminiferal assemblages on the Carnarvon Ramp and Northwestern Shelf of Western Australia

The carbonate sediments of the Western Australian shelf in the Indian Ocean host diverse assemblages of benthic foraminifera. Environments of the shelf are dominated by the southward-flowing Leeuwin Current, which impacts near-surface circulation and influences biogeographic ranges of Indo-Pacific warm-water foraminifera. Analyses of outer ramp to...

Christian Haller; Pamela Hallock; Albert C. Hine; Smith, Christopher

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Year Published: 2019

Energetic constraints and the paradox of a diffusing population in a heterogeneous environment

Previous mathematical analyses have shown that, for certain parameter ranges, a population, described by logistic equations on a set of connected patches, and diffusing among them, can reach a higher equilibrium total population when the local carrying capacities are heterogeneously distributed across patches, than when carrying capacities having...

Wang, Yuanshi; DeAngelis, Donald L.

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Year Published: 2019

Mixed-chemical exposure and predicted effects potential in wadeable southeastern USA streams

Complex chemical mixtures have been widely reported in larger streams but relatively little work has been done to characterize them and assess their potential effects in headwaterstreams. In 2014, the United States Geological Survey (USGS) sampled 54 Piedmont streams over ten weeks and measured 475 unique organic compounds...

Bradley, Paul M.; Journey, Celeste A.; Berninger, Jason P.; Button, Daniel T.; Clark, Jimmy M.; Corsi, Steven R.; DeCicco, Laura A.; Hopkins, Kristina G.; Huffman, Bradley J.; Nakagaki, Naomi; Norman, Julia E.; Nowell, Lisa H.; Qi, Sharon L.; Van Metre, Peter C.; Waite, Ian R.

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Year Published: 2019

Water-quality trends in US rivers: Exploring effects from streamflow trends and changes in watershed management

We present a conceptual model that explores the relationship of streamflow trends to 15 water-quality parameters at 370 sites across the contiguous United States (US). Our analytical framework uses discrete water-quality data, daily streamflow records, and a statistical model to estimate water-quality trends between...

Murphy, Jennifer C.; Sprague, Lori A.

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Year Published: 2019

Optimal spatial allocation of control effort to manage invasives in the face of imperfect detection and misclassification

Imperfect detection and misclassification errors are often ignored in the context of invasive species management. Here we present an approach that combines spatially explicit models and an optimization technique to design optimal search and destroy strategies based on noisy monitoring observations. We focus on two invasive plants, melaleuca (...

Bonneau, Mathieu; Martin, Julien; Peyrard, Nathalie; Rodgers, LeRoy; Romagosa, Christina M.; Johnson, Fred A.

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Year Published: 2019

Evaluating potential distribution of high-risk aquatic invasive species in the water garden and aquarium trade at a global scale based on current established populations

Aquatic non‐native invasive species are commonly traded in the worldwide water garden and aquarium markets, and some of these species pose major threats to the economy, the environment, and human health. Understanding the potential suitable habitat for these species at a global scale and at regional scales can inform risk assessments and predict...

West, Amanda M.; Jarnevich, Catherine S.; Fuller, Pam; Young, Nicholas E.

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Year Published: 2019

Stable isotope analysis enhances our understanding of diamondback terrapin Malaclemys terrapin foraging ecology

Dietary studies on generalist predators may provide valuable information on spatial or temporal changes in the structure of ecological communities. We initiated this study to provide baseline data and determine the utility of stable isotope analysis (SIA) to evaluate the foraging strategies of an opportunistic reptilian predator, the diamondback...

Denton, Mathew J.; Demopoulos, Amanda W.J.; Baldwin, John D.; Smith, Brian; Hart, Kristen M.

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Year Published: 2019

Carbon storage potential in a recently created brackish marsh in eastern North Carolina, USA

Carbon (C) sequestration through accumulated plant biomass and storage in soils can potentially make wetland ecosystems net C sinks. Here, we collected GHG flux, plant biomass, and litter decomposition data from three distinct vegetation zones (Spartinaalterniflora, Juncus roemerianus and Spartina patens) on a 7-...

Shiau, Yo-Jin; Burchell, Michael R.; Krauss, Ken W.; Broome, Stephen W.; Birgand, Francois

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Year Published: 2019

Global dynamics of a mutualism–competition model with one resource and multiple consumers

Recent simulation modeling has shown that species can coevolve toward clusters of coexisting consumers exploiting the same limiting resource or resources, with nearly identical ratios of coefficients related to growth and mortality. This paper provides a mathematical basis for such as situation; a full analysis of the global dynamics of a new...

Wang, Yuanshi; Wu, Hong; DeAngelis, Donald L.

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Year Published: 2019

Characterizing residence patterns of North Atlantic right whales in the southeastern U.S. with a multistate open robust design model

Effective conservation of endangered North Atlantic right whales (Eubalaena glacialis) requires information about their spatio-temporal distribution. Understanding temporal distribution is particularly important, because a portion of the population migrates between high latitude summer feeding grounds off the northeastern U.S. and Canadian...

Krystan, A.M.; Gowan, T.A.; Kendall, William L.; Martin, Julien; Ortega-Ortiz, J.G.; Jackson, K.B.; Knowlton, A.R.; Naessig, P.; Zani, M.; Schulte, D.W.; Taylor, C.R.

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Year Published: 2019

A Bayesian approach to predict sub-annual beach change and recovery

The upper beach, between the astronomical high tide and the dune-toe, supports habitat and recreation along many beaches, making predictions of upper beach change valuable to coastal managers and the public. We developed and tested a Bayesian network (BN) to predict the cross-shore position of an upper beach elevation contour (ZlD) following 1...

Wilson, Kathleen; Lentz, Erika E.; Miselis, Jennifer L.; Safak, Ilgar; Brenner, Owen T.

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