Skip Navigation

EcoEdDL

Home Browse Resources Submission Instructions About Help Advanced Search

Search Results

> >> >|
Order:
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 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

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 David Inouye. Note the significant fluctuation in the number of heads produced from year to year.

 

Publisher: EcoEd Digital Library

Thumbnail
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 statistically significant due to large year-to-year variability.

 

Publisher: EcoEd Digital Library

Thumbnail
View Resource Investigating Climate Change Evidence

This activity uses the jigsaw method to encourage students, in groups, to become experts on different types of evidence as a means of understanding climate change. Each group focuses on a topic, highlights at least one data set within that topic, and researches the data collection process along with the potential consequences of the evidence. Students are asked to critique the evidence they...

 

Publisher: EcoEd Digital Library

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, and is the location of the research described in this slide show.

 

Publisher: EcoEd Digital Library

Thumbnail
> >> >|
Order: