Late Pleistocene and Holocene environments of the Southeastern United States from the stratigraphy and pollen content of a peat deposit on the Georgia Coastal Plain

LaMoreaux, Heidi K.; Brook, George A.; Knox, John A.

doi:10.1016/j.palaeo.2009.06.017

Cited by 36 publications

(22 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The lower levels of mtDNA variability of the US breeding population could also be explained by a recent colonization of the area or by a previous historic bottleneck, as suggested by Van Den Bussche et al (1999). Recent paleoclimatological studies have found that a warmer and wetter climate than is currently observed in the southeastern US prevailed between 11,000 and 4500 years ago (LaMoreaux et al, 2009). Given that paleoclimatic events can cause profound changes in the levels of biodiversity associated with wetland areas (Junk, 2003) and that wood stork foraging and reproduction are highly dependent on water levels (Coulter et al, 1999), it is plausible that much of the southeastern US region might not have had appropriate conditions for breeding wood storks prior to 4500 years before the present.…”

Section: Genetic Diversitymentioning

confidence: 98%

Genetic status of the wood stork (Mycteria americana) from the southeastern United States and the Brazilian Pantanal as revealed by mitochondrial DNA analysis

Lopes

Tomasulo‐Seccomandi²,

Bryan³

et al. 2011

Genet. Mol. Res.

View full text Add to dashboard Cite

ABSTRACT. The wood stork (Mycteria americana) is a colonial wading bird that inhabits the Neotropical region from the southeastern United States (US) to northern Argentina. The species is considered to be endangered in the US due to degradation of its foraging and breeding habitat. In other parts of its range, such as in the Brazilian Pantanal region, breeding populations of this species appear to be stable. We compared the levels of genetic variability and population structuring of the US and the Pantanal breeding populations using mitochondrial DNA (mtDNA) control region 1910-1922 (2011) Mitochondrial DNA diversity of wood storks sequences. Twenty-seven haplotypes were identified among 88 wood stork samples collected from eight breeding colonies in the US and eight in the Pantanal. Patterns indicative of heteroplasmy were observed in 35.3% of the mtDNA sequences that were examined. Significantly higher levels of haplotype diversity were observed in the Pantanal samples compared to those from the US, suggesting that during the last century, demographic declines or a recent evolutionary bottleneck reduced the levels of mtDNA variability of the US population. Analyses of genetic structuring revealed non-significant genetic differentiation between these regions, indicating that either the populations were only recently separated or that gene flow continues to occur at low levels. Haplotype network analysis indicated low current levels of gene flow between populations that were closely related in the past.

show abstract

Section: Genetic Diversitymentioning

confidence: 98%

Genetic status of the wood stork (Mycteria americana) from the southeastern United States and the Brazilian Pantanal as revealed by mitochondrial DNA analysis

Lopes

Tomasulo‐Seccomandi²,

Bryan³

et al. 2011

Genet. Mol. Res.

View full text Add to dashboard Cite

show abstract

“…Watts (1975b) reported mixed conifer-spruce forest from northwestern GA in late OIS2 sediments, with a transition to oak-pine forest following the Younger Dryas. LaMoreaux et al (2009) reported evidence of OIS2 cool and dry climate (grassland) in the GA coastal plain, but noted warmer and wetter conditions by $16 ka. Whitehead (1981) interpreted the OIS2 full-glacial and late-glacial pollen assemblage from Rockyhock Bay in northeastern NC (n on Fig.…”

Section: Paleoecological Datamentioning

confidence: 99%

Synthesis on Quaternary aeolian research in the unglaciated eastern United States

Markewich

Litwin

Wysocki³

et al. 2015

Aeolian Research

View full text Add to dashboard Cite

“…In either case, T1f is interpreted as clastic sedimentation that outpaced the accumulation of organic matter. Other studies in the southeastern USA also have found evidence of higher magnitude flood events, as well as increased hillslope sedimentation, during the early Holocene (Goman and Leigh 2004;Leigh and Webb 2006;Leigh 2008;Liang 2008;LaMoreaux et al 2009). Although these studies are all from somewhat larger watersheds, USGS gaging records show that large and small basins in the Blue Ridge Mountain respond in a similar fashion during flood events.…”

Section: Landscape Evolutionmentioning

confidence: 87%

Terminal Pleistocene through Holocene Evolution of Whiteoak Bottoms, a Southern Blue Ridge Mountains Peatland

McDonald

Leigh

2011

Wetlands

View full text Add to dashboard Cite

Our primary objective was to develop an understanding of the geomorphic evolution of Whiteoak Bottoms (WOB), a peatland along the Nantahala River in the Southern Blue Ridge Mountains (SBRM) of western North Carolina. Radiocarbon dates directly above basal fluvial sediments returned ages of 14,000 to 15,000 cal yr BP. These ages indicate WOB is the oldest dated peatland in the SBRM and that such wetlands have persisted throughout the Holocene. Below the relatively flat surface of the wetland, paleochannels, similar to those of the modern channel, were found; suggesting a persistence of similar channel morphology since the terminal Pleistocene. The wetland's stratigraphy reveals a consistent pattern with basal fluvial cobbles being overlain by sandy channel-fill grading up into peat. Two different distinct inorganic deposits separate the lower organic deposits from the sapric peat deposits at the surface. Interestingly, we estimate more than 56% of the organic matter preserved by the wetland accumulated during the first 6,000 years of development. Overall, WOB has accumulated approximately 424 Mg/ha of carbon during the past 15,000 years. Maintenance of this wetland initially depended on the Nantahala River; however, today it is ground water and beavers that allows for the persistence of this rare landscape.

show abstract

Late Pleistocene and Holocene environments of the Southeastern United States from the stratigraphy and pollen content of a peat deposit on the Georgia Coastal Plain

Cited by 36 publications

References 64 publications

Genetic status of the wood stork (Mycteria americana) from the southeastern United States and the Brazilian Pantanal as revealed by mitochondrial DNA analysis

Genetic status of the wood stork (Mycteria americana) from the southeastern United States and the Brazilian Pantanal as revealed by mitochondrial DNA analysis

Synthesis on Quaternary aeolian research in the unglaciated eastern United States

Terminal Pleistocene through Holocene Evolution of Whiteoak Bottoms, a Southern Blue Ridge Mountains Peatland

Contact Info

Product

Resources

About