Biomes: Old-school?

A biome has traditionally been defined (broadly and loosely, of course) as an area that has similar plant and animal communities and geologic and climatic structures.  In recent years, the term ecosystem has come to be virtually interchangeable. But Erle Ellis of the University of Maryland at Baltimore County believes that doing ecology by defining biomes is antiquated.  In this video by The Discovery Channel, he proposes instead the...

Read More

Evolution and ecosystem engineers

Evolutionary biologists agree that the natural environment shapes the evolution of life. A study published in Nature today, however, finds that the evolution of a species can also have big impacts on the surrounding environment. Threespine stickleback are famous as an example of rapid, adaptive radiation. These small freshwater fish have evolved in the lakes of British Columbia to have very different lifestyles.  In large lakes, there...

Read More