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Acidic Deposition in the Northeastern United States: Sources and Inputs, Ecosystem Effects, and Management Strategies
A deposition is the transfer of strong acids and acid-forming substances from the atmosphere to the surface of the Earth. The composition of acidic deposition includes ions, gases, and particles… Expand
Increased tree carbon storage in response to nitrogen deposition in the US
Spatially extensive evidence for nitrogen-induced stimulation of forest growth has been lacking. Analysis of forest inventory data from the northeastern and north-central US collected during the… Expand
Nitrogen cycling in a northern hardwood forest: Do species matter?
This study indicates that tree species can exert a strong control on N cycling in forest ecosystems that appears to be mediated through the quality of soil organic matter, but that standard measures of litter quality cannot explain the mechanism of control. Expand
Long-term sodium chloride retention in a rural watershed: legacy effects of road salt on streamwater concentration.
- V. Kelly, G. Lovett, +4 authors G. Likens
- Environmental Science, Medicine
- Environmental science & technology
- 15 January 2008
Model results suggest that the increase in streamwater concentration and export was likely due to a lag effect of long-term road salt use and subsurface buildup. Expand
Forest Ecosystem Responses to Exotic Pests and Pathogens in Eastern North America
This work identifies six key features of the biology of exotic animal pests and the ecology of their hosts that are critical to predicting the general nature and severity of those impacts in eastern forest ecosystems. Expand
Ecological Thresholds: The Key to Successful Environmental Management or an Important Concept with No Practical Application?
The scope of the thresholds concept in ecological science is defined and methods for identifying and investigating thresholds using a variety of examples from terrestrial and aquatic environments, at ecosystem, landscape and regional scales are discussed. Expand
NITROGEN SATURATION AND RETENTION IN FORESTED WATERSHEDS OF THE CATSKILL MOUNTAINS, NEW YORK
The Catskill Mountains of southeastern New York receive relatively high rates of atmospheric N deposition, and NO3 2 concentrations in some streams have increased dramatically since the late 1960s.… Expand
A Framework for a Theory of Ecological Boundaries
An inclusive scope for boundary studies is presented and the use of the linked tools of framework, model template, and working model are exemplified with an experimental study of forest–field boundary function. Expand
Effects of nitrogen deposition and empirical nitrogen critical loads for ecoregions of the United States
Human activity in the last century has led to a significant increase in nitrogen (N) emissions and atmospheric deposition. This N deposition has reached a level that has caused or is likely to cause… Expand
Sustainable Biofuels Redux
Science-based policy is essential for guiding an environmentally sustainable approach to cellulosic biofuels and it is important to have a strategy that acknowledges the role of science in promoting sustainability. Expand