human impact eee 105 read ch. 12. human impact renewable resource e.g. forests civilization ~...

Human Impact EEE 105

Read Ch. 12

Human Impactrenewable resourcee.g. forests

civilization ~ deforestationwatershed management

The campaign against The campaign against logging in National logging in National ForestsForests

48% of hardwood production palettes

National ForestsNational Forests

Human Impactrenewable resourcee.g. forests

Judge Buzzcuts Timber Sales on American Forests

BENTON, Illinois, October 5, 1999 (ENS) - A small grassroots environmentalgroup has won a court ruling that shuts down timber sales on an estimated110,000 acres of U.S. National Forests across the country. This is thefirst time a federal judge has issued an injunction on the entire National Forest system. Chief Judge J. Phil Gilbert of the Federal District Courtfor the Southern District of Illinois ruled September 29 that the U.S. Forest Service acted illegally in allowing timber sales under a loophole known as the "categorical exclusion." The case was brought by Heartwood, a Bloomington, Indiana based regional forest protection network and two self-taught forest experts, Jim Bensman and Mark Donham.

Mark Rey, Under Secretary of Agriculture

for Natural Resources

Human Impactrenewable resourcee.g. forestsold-growth vs. secondary growth

Human ImpactHuman Impactrenewable resourcee.g. forestsold-growth vs. secondary growth

Human ImpactHuman Impactrenewable resourcee.g. forestsold-growth vs. secondary growth

Human Impactrenewable resourcee.g. forestsclear-cutting

Human Impactrenewable resourcee.g. forestssustainable forestlandssustainable forestlands

CowbirdHuman Impactrenewable resourcee.g. forests -- fragmentation

CowbirdHuman Impactrenewable resourcee.g. forests -- fragmentation

Dr. Scott RobinsonDr. Scott Robinson

Human Impact

ExtinctionAdapt or go extinct

e.g. the Passenger Pigeon

Human Impact

ExtinctionAdapt or go extinct

e.g. the Passenger Pigeonthe Dodo & Calvaria tree

Human Impact

Extinction

Conservationists estimate that the current extinction rate is 1,000 to 10,000 times higher than it should be under natural conditions.

Human Impact

ExtinctionWhy?

habitat destructionintroduced competitors and predators e.g. Hawaiian birds

Human Impact

Two Nenes begging