Vocabulary: » Term: » Records: » ID: 132

Click image to see larger image	A dam in the middle of a river
Location	http://www.michigan.gov/deq/0,1607,7-135-3313_3684_3723-9515--,00.html
Observations	Dams are man-made barriers that are built to block or redirect water flow of rivers and streams. This dam was built to slow down water flow and prevent flooding.
Explanations	Dams have negative impacts on the plants and animals that have adapted to the specific movement of natural rivers and streams. Dams also cause temperature changes, erosion, and movement of sediment that are deadly to many organisms.
California Standards	Know organisms depend on their environments Ecosystems
National Standards	Organisms and their environments How to distinguish between natural and man-made objects Changes in environments Populations and ecosystems
Related NSF Exemplary Curriculum	Environments Habitats Ecosystems Investigating ecosystems
Related Sets	The impacts of humans on the environment.
Creative Commons License	This work is licensed under a Creative Commons Attribution-Share Alike 2.5 License.
Authors	Katie Hale khale92807@aol.com Student, Biological Sciences, California State University, Fullerton
Publisher	Byron Lane, State of Michigan 517-241-9862 Jan 12 2007

This material is based upon work that was supported by the National Science Foundation under Grant No. 0127164 to California State University Fullerton. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.