Mrs. Harlin Conservation of Natural Resources
2.2.2 • Explain how the use, protection and conservation of natural resources by humans impact the environment from one generation to the next.
Sustainable Use Policy • Philosophy that strives to enable people to use natural resources in ways that will benefit them and maintain the ecosystem.
Resource Use • Overusing resources will deplete them faster than they can be replenished. • Water • Trees • Food • Fossil fuels
Deforestation • Cutting down or burning trees makes room for homes and cities, but it is destroying homes of many organisms creating less biodiversity. • Also, with fewer trees , there will be more carbon dioxide in the atmosphere and less oxygen. This is a factor in global warming.
Pesticide Use • Pesticides are used to kill insects that are parasites to plants and animals. • This can be good, but it can also have negative effects on the environment.
Biomagnification Also known as bioaccumulation. It is the increase in concentration of a substance, such as the pesticide DDT.
DDT: A Threat to America's Bald Eagles Watch this video clip to see how bioaccumulation is harmful to organisms. http://player.discoveryeducation.com/index.cfm?guidAssetId=FEC52D26-A05B-485B-AB2F-70D239C1B32E&blnFromSearch=1&productcode=US
Legal Protections • U.S. Endangered Species Act of 1973 made it illegal to harm any species on the endangered or threatened species list, or their environment.
Preserving Habitats • Natural Preserves and Parks • 1st -> Yellowstone National Park (1872) • Big Cypress National Preserve • Crater Lake National Park • Big Bend National Park • Sequoia National Park
Habitat Corridors • Protected strips of land that allow the migration of organisms from one wilderness area to another. • Ex: Land underneath a highway so animals will not get hit by a car. • Ex: Hoover Dam
Reintroduction Programs • Taking care of organisms then releasing them back into an area where the once lived. Ex: wild-turkey in N.C.
Captivity • An organism that is held by humans to prevent extinction. • Ex: ginkgo tree
Protecting Plants • Plants are easier to protect because you can cool seeds and store them for future planting. • Animals on the other hand are really expensive to keep, feed, and take care of. Plus, they may lose natural behaviors that enable them to survive in the wild.