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Issues in Ecology, Issue 15: Excess Nitrogen in the U.S. Environment: Trends, Risks, and Solutions
It is not surprising that humans have profoundly altered the global nitrogen (N) cycle in an effort to feed 7 billion people, because nitrogen is an essential plant and animal nutrient. Food and energy production from agriculture, combined with industrial and energy sources, have more than doubled the amount of reactive nitrogen circulating annually on land. Humanity has disrupted the nitrogen...
Publisher: EcoEd Digital Library
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Issues in Ecology, Issue 14: Setting Limits: Using Air Pollution Thresholds to Protect and Restore U.S. Ecosystems
The purpose of this report is to distill advances in the science of air pollution thresholds and to describe their use to assess, protect and manage the nation’s ecosystems and the vital services they provide. We focus here on the environmental impacts of nitrogen, sulfur, and mercury and refer to connections to climate change. The discussion draws on the published research of hundreds o...
Publisher: EcoEd Digital Library
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Issues in Ecology, Issue 13: Active Teaching on Carbon Dynamics in Ecosystems
All ecology texts include figures showing carbon cycles of various types (terrestrial, marine, global, etc). However, education research shows that introductory level students (both college and high school) and many citizens do not understand the biological and ecological processes that are the foundation for these cycles.
Publisher: EcoEd Digital Library
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Issues In Ecology, Issue 13: A Synthesis of the Science on Forests and Carbon for U.S. Forests
Forests play an important role in the U.S. and global carbon cycle, and carbon sequestered by U.S. forest growth and harvested wood products currently offsets 12-19% of U.S. fossil fuel emissions. The cycle of forest growth, death, and regeneration and the use of wood removed from the forest complicate efforts to understand and measure forest carbon pools and flows. Our report explains these...
Publisher: EcoEd Digital Library
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Issues in Ecology, Issue 15: Press Release
This January 2012 press release introduces and describes the significance of issue #15 of ESA's Issues in Ecology series, "Excess Nitrogen in the U.S. Environment: Trends, Risks, and Solutions."
Publisher: EcoEd Digital Library
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