Treesearch

Water connects physical, biological, chemical, ecological, and economic forces across the landscape. While hydrologic processes and scientific investigations related to sustainable agricultural systems are based on universal principles, research to understand processes and evaluate management practices is often site-specific in order to achieve a critical mass of expertise and research infrastructure to address spatially, temporally, and ecologically complex systems.

Understanding anthropogenic and environmental controls on fluvial Mercury (Hg) bioaccumulation over global and national gradients can be challenging due to the need to integrate discrete-sample results from numerous small scale investigations. Two fundamental issues for such integrative Hg assessments are the wide range of basin scales for included studies and how well discrete samples capture the characteristically high temporal variability of fluvial biogeochemistry, seasonally and over shorter time spans.

With the growing fraction of the world’s forests being intensively managed plantations, these ecosystems will increasingly be relied upon to provide other ecosystemservices, in addition to merchantable timber. Schemes proposing the use of managed forests to mitigate climate change by sequestering carbon, however, are yet to be tested for feasibility and cost. In the current study we will review literature on forest responses to key climate and management factors on the inputs and outputs to the soil C pool in the context of expected changes under management. Recent global reviews indicate...

Mercury is the number one contaminant in surface waters of the U.S. because of health concerns for both humans and other animals when they consume fish.

As part of the regional PINEMAP (Pine Integrated Network: Education, Mitigation, and Adaptation project) funded by the NIFA - USDA, we established a factorial study in McCurtain County, OK near Broken Bow. This study examined the effects of fertilization and ~30 percent reduction in throughfall on an seven-yearold loblolly pine (Pinus taeda L.) plantation. The objective of this study was to determine effects of decreased water availability and fertilization on tree growth. We measured tree and stand development as well as a suite of ecophysiological variables. Tree growth was reduced in...

The Forest Service is currently revising the previous 1995 Forest Plan for the Francis Marion National Forest in Coastal South Carolina developed in the wake of Hurricane Hugo which devastated the forest in 1989. Since 1995, the human communities surrounding the Francis Marion National Forest have grown and changed significantly. The revised Francis Marion Forest Plan is being developed under the 2012 Forest Planning Rule. More information concerning the Francis Marion National Forest Plan Revision can be found at: http://www.fs.usda.gov/main/scnfs/landmanagement/planning.

While current weather patterns and rapidly accelerated changes in technology often focus attention on short-term trends in agriculture, the fundamental demands on modern agriculture to meet society food, feed, fuel and fiber production while providing the foundation for a healthy environment requires long-term perspective. The Long- Term Agroecoystem Research Network was established by USDA to ensure sustained crop and livestock production and ecosystem services from agriculture, as well as to forecast and verify the effects of environmental trends, public policies, and emerging technologie...

Climate models project decreased soil water availability in the southeastern United States, which may impact loblolly pine (Pinus taeda L.) productivity. In conjunction with an interdisciplinary project known as PINEMAP, the objective of this study was to investigate the interactive effects of fertilization and a 30 percent reduction in throughfall on physiological characteristics that affect forest productivity. Stand growth, leaf area index (LAI) and leaf physiology were monitored over three years of treatment. Only the most recent preliminary results are presented here for June 2014....

Interpreting storm-event runoff in coastal plain watersheds is challenging because of the space- and time-variable nature of different sources that contribute to stream flow. These flow vectors and the magnitude of water flux is dependent on the pre-storm soil moisture (as estimated from depth to water table) in the lower coastal plain (LCP) region.

In the face of dual pressures in coastal South Carolina - residential and commercial development, along with potential climate change impacts - stakeholders need clear, accurate, relevant, and easily-accessible information for effective decision-making for watershed management and natural resource protection.