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4 results for “longleaf pine woodland”
Data for: Hardwoods influence effect of climate and intraspecific competition on growth of woodland longleaf pine trees
<p>Longleaf pine woodlands of the North American Coastal Plain are proposed to be resilient to climate change impacts, but little is known about changes in limiting factors to longleaf pine growth as climate has changed in the late 20<sup>th</sup> and early 21<sup>st</sup> centuries. Moreover, the role that neighborhood trees play in the context of climate change remains largely unexplored. We used static and moving-window tree-ring and climatic analyses to measure the effects of climate on longleaf pine growth at a site in southwest Georgia, USA. We then performed maximum likelihood analysis to examine the influence of neighboring hardwoods on the response of longleaf pine growth to the joint effects of competition and climate. Analysis of climate data from local stations in southwest Georgia over six decades indicated that mean air temperature decreased until the late 20<sup>th </sup>century and then began to rise, and that the variability of spring and summer precipitation has increased. Tree ring and climate analyses indicated longleaf pine radial growth is sensitive to precipitation and air temperature, and that the strength of correlation of longleaf pine growth to summer air temperature and summer precipitation increased since the 1950s. Likelihood models, which were applied over a shorter (23-year) period and explicitly incorporated competition, did not support a link between summer temperature and growth but did indicate summer precipitation increased growth. Furthermore, basal area of neighboring hardwoods was correlated with greater pine growth per millimeter of precipitation. Basal area of neighboring longleaf pine negatively affected the growth of conspecific trees; the presence of hardwoods increased the competitive effect when basal area of neighboring pine trees was low (<10 m<sup>2</sup> ha<sup>-1</sup>) but decreased the competitive effect when basal area of neighboring pine trees was high (≥ 10 m<sup>2</sup> ha<sup>-1</sup>). These results suggest that retention or recruitment of hardwood trees when restoring longleaf pine woodlands may contribute to increased ability to withstand dry summers and may help to allay concerns of managers that retention of hardwoods will unduly affect the growth of residual mature longleaf pines.</p>
Data for: Hardwoods influence effect of climate and intraspecific competition on growth of woodland longleaf pine trees
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Data for: At a fine scale, hardwood patches support wildlife diversity in longleaf pine woodlands
<p>Restoring and maintaining biodiversity in a changing world is increasingly challenging due to the competing needs of species for suitable space and resources. One ecosystem that has seen considerable anthropogenic changes in extent and structure is the longleaf pine (<em>Pinus</em> <em>palustris</em>) ecosystem. Understanding how wildlife responds to restoration is important to informing forest restoration and conservation. We monitored game birds and mid-large-sized mammal occupancy in and around hardwood patches embedded within a longleaf pine woodland at The Jones Center at Ichauway in Newton, GA. We found that 11 species use the transition zone between the longleaf pine and hardwood hammocks. Gray squirrels (<em>Sciurus</em> <em>carolinensis</em>), Virginia opossums (<em>Didelphis</em> <em>virginiana</em>), nine-banded armadillos (<em>Dasypus</em> <em>novemcinctus</em>) occupancy increased along the gradient while and fox squirrel (<em>Sciurus</em> <em>niger</em>) declined. Our results suggest that oak patches and transitional zones are important to maintaining biodiversity within the longleaf pine ecosystem.</p>
Data for: At a fine scale, hardwood patches support wildlife diversity in longleaf pine woodlands
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