Wade A Wall

Wade A Wall
North Carolina State University | NCSU · Department of Plant Biology

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19
Publications
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Publications

Publications (19)
Article
Prior to European settlement the longleaf pine (Pinus palustris) ecosystem covered over 92 million hectares in the southeastern United States. Historically, fire was an important driver of species composition in the longleaf pine ecosystem, but fire exclusion since the early 20th century has led to the degradation of longleaf pine communities and h...
Article
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Understanding demographic vital rates and the factors that affect those rates are key components of successful conservation strategies for many threatened and endangered rare plant species. Lindera subcoriacea is a rare dioecious shrub that occupies isolated wetland habitats in a small number of locations in the southeastern United States. The spec...
Article
Rare species reintroductions are an increasingly common conservation strategy, but often result in poor survival of reintroduced individuals. Reintroduction sites are chosen primarily based on historical occupancy and/or abiotic properties of the site, with much less consideration given to properties of the larger biotic community. However, ecologi...
Article
Fire controls tree cover in many savannas by suppressing saplings through repeated topkill and resprouting, causing a demographic bottleneck. Tree cover can increase dramatically if even a small fraction of saplings escape this fire trap, so modelling and management of savanna vegetation should account for occasional individuals that escape the fir...
Article
The ability to propagate and successfully reintroduce rare plant species is an important component in the conservation biologist's toolbox. Unfortunately for many species, propagation methods and details about the species' life histories, which can potentially inform reintroduction efforts, are often unknown. We describe for the first time the pseu...
Article
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Genetic factors such as decreased genetic diversity and increased homozygosity can have detrimental effects on rare species, and may ultimately limit potential adaptation and exacerbate population declines. The Gulf and Atlantic Coastal Plain physiographic region has the second highest level of endemism in the continental USA, but habitat fragmenta...
Article
Biased sex ratios can have conservation consequences for dioecious plant species with small population sizes because of an increased risk of single sex populations. Biased sex ratios have been observed in two of the three species of Lindera (Lauraceae) in the eastern United States, but have not been documented for Lindera subcoriacea, a rare shrub...
Article
Prioritizing management of invasive plants is important for large land management entities, such as federal and state public land stewards, because management resources are limited and multiple land uses and management objectives are differentially impacted. Management decisions also have important consequences for the likelihood of success and ult...
Conference Paper
Background/Question/Methods Because of its substantial effects on demographic vital rates, fire has been used successfully to manage for fire-dependent plant species in a number of ecosystems. However, not all plant species respond positively to fire, even in fire-dependent ecosystems, making it particularly important to study the effects of fire...
Article
Fire can have dramatic effects on the vital rates of plant species and has been used successfully for management in a number of ecosystems. However, the demographic response of species to fire in fire-dependent ecosystems is variable, making it important to study the effects of fire on rare and threatened species. We quantified the effects of fire...
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Conversion to agriculture and plantations, development, and fire suppression have reduced the extent of savannas in the southeastern United States, and there is a need to catalog and classify the remaining savannas for both restoration and resource management purposes. The Big Savannah was a wet savanna in North Carolina that was destroyed in the 1...
Conference Paper
Background/Question/Methods Fire is an important disturbance in a variety of ecosystems and can have multiple direct and indirect effects on the population dynamics of many plant species. In the southeastern United States, the longleaf pine ecosystem is dependent on frequent fire, and fire suppression in the last century has led to dramatic popula...
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Full-text available
Establishing the phylogenetic and demographic history of rare plants improves our understanding of mechanisms that have led to their origin and can lead to valuable insights that inform conservation decisions. The Atlantic coastal plain of eastern North America harbours many rare and endemic species, yet their evolution is poorly understood. We inv...
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Pyxidanthera brevifolia is an evergreen semi-woody cushion plant endemic to the Sandhills of North and South Carolina, with the majority of populations occurring on Fort Bragg Military Reservation in North Carolina. Currently the species is listed as Endangered in North Carolina and is designated as a Species at Risk (SAR) by the US Department of D...
Article
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The general phylogeographical paradigm for eastern North America (ENA) is that many plant and animal species retreated into southern refugia during the last glacial period, then expanded northward after the last glacial maximum (LGM). However, some taxa of the Gulf and Atlantic Coastal Plain (GACP) demonstrate complex yet recurrent distributional p...
Article
Full-text available
Increases in tree density resulting from fire suppression have contributed considerably to the loss of savanna and grassland habitats in North America. Inability to tolerate shade is likely an important cause of species loss in areas that have not maintained historical burning regimes. We conducted an experiment to test whether differences in shade...