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View Resource Abandoned mine drainage stream in productive woods

abandoned mine drainage, Pennsylvania, anthracite mining

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View Resource Obtaining sediment core from Windy Lake in British Columbia

This photograph shows scientists obtaining sediment core, which is useful in studying changes in forest composition, the frequency of forest fires, and climate change over the past 10,000 years. ...

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View Resource Lake levels and drought indices in northern Wisconsin: data, graphs, and photographs.

These materials include 25-year records of lake levels in 7 lakes in Northern Wisconsin, Palmer Drought Severity Index (PDSI) and precipitation; graphs illustrating changes in lake levels over time;...

View Resource Foraging and Flocking Behavior

In this laboratory exercise, the following issues are examined: 1) why neither predators nor prey go extinct when there is a long period of nonrenewal of the prey population 2) the effects of...

View Resource Issues in Ecology, Issue 01: Human Alteration of the Global Nitrogen Cycle: Causes and Consequences

This report presents an overview of how humans have altered the global nitrogen cycle. An introduction to the nitrogen cycle is provided; as well as human induced nitrogen fixation and its impact on...

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