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View Resource 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...

View Resource Effects of frost on wildflowers: an unexpected consequence of climate change--image 09 of 22

A graph of the number of unfrosted flowers of the aspen sunflower (Helianthella quinquenervis) from an annual count in a 10x45m plot at the Rocky Mountain Biological Laboratory, Gothic, Colorado, by...

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View Resource Effects of frost on wildflowers: an unexpected consequence of climate change--image 01 of 22

A view of the Rocky Mountain Biological Laboratory, a high-altitude field research station at 9,500 feet in the Colorado Rocky Mountains. RMBL has supported field work since it was founded in 1928,...

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View Resource Effects of frost on wildflowers: an unexpected consequence of climate change--image 03 of 22

Date of winter snowpack melt during the past 36 years at Rocky Mountain Biological Laboratory. A trend toward earlier snowmelt was noted during the study period, though the correlation was not...

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View Resource Sustainable Biofuels from Forests: Meeting the Challenge

This report examines how forest products could be used as biofuel and the availability of these products. To study the sustainability of this bioenergy source, this report reviews some of the forest...

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