Living+World

The Living World A.Ecosystem Structure (Biological populations and communities; ecological niches; interactions among species; keystone species; species diversity and edge effects; major terrestrial and aquatic biomes) wolves change rivers media type="custom" key="26582608"

[|iodiversity Habitats]media type="custom" key="10217075" width="81" height="81" align="left"media type="custom" key="10217217" width="81" height="81" align="left"

media type="custom" key="10217227" width="81" height="81" align="left"

B.Energy Flow (Photosynthesis and cellular respiration; food webs and trophic levels; media type="custom" key="11103012" width="72" height="72" align="left"

ecological pyramids) [|lake michigan food web]

C.Ecosystem Diversity Chp 4 powerpoint [|powerpoint chp4]

(Biodiversity; natural selection; evolution; ecosystem services)

The Case of the Vanishing Bees If you've noticed that there aren't as many bees buzzing around your magnolias lately, or that you haven't been "stung" during the family picnic in quite some time, it probably isn't your imagination. The number of honey bees in the U.S. and abroad has been declining steadily for the past several years, and it's all due to a mysterious syndrome called colony collapse disorder (CCD). This phenomenon, which has affected more than 30 percent of bee colonies in the U.S., could have a huge impact on the global agricultural market because so many plants (some 52 of the world's 112 leading crops) rely on insect pollination.

Colony Collapse Disorder

From 1972 to 2006, a significant reduction in the number of feral honey bees occurred in the U.S. At the same time, beekeepers were reporting a gradual decline in the number of colonies they maintained. By late 2006, the rate of disappearance had increased to alarming proportions, and the term "colony collapse disorder" emerged as the newest "buzz word" to describe the sudden, dramatic rash of disappearances. By February 2007, commercial beekeepers in several states reported losing 30 to 90 percent of their bee colonies. The decline continues.

D.Natural Ecosystem Change (Climate shifts; species movement; ecological succession) media type="custom" key="10227803"

E.Natural Biogeochemical Cycles Chapter 5 outline Chapter 5 powerpoint (Carbon, nitrogen, phosphorus, sulfur, water, conservation of matter) media type="custom" key="10218137" media type="custom" key="10218197"