Presentation on theme: "CH 22 SUSTAINING WILD SPECIES. IV. Extinction Threats from Habitat Loss A. Greatest threat is habitat loss, degradation and fragmentation Highest species."— Presentation transcript:
IV. Extinction Threats from Habitat Loss A. Greatest threat is habitat loss, degradation and fragmentation Highest species loss from rainforest deforestation, coral reef destruction, pollution in streams Disturbances come from:
B. Problems with Habitat destruction 1. Decrease in pop size 2. increase edge effects, 3. creates barriers for species
V. Invasive Exotics How do they enter? Cost $137B year! Why a problem? Accidental Intros: fire ant, brown tree snake, asian tiger mosquito Deliberate intro? Solutions?
VI. Hunting/Poaching Trade=$20B yr Why? Case study: elephants VII. Pest/Predators -Exotic Pets -Role of climate change
VIII. LAWS 1975 CITES=152 countries and 900 species. Problems…. Lacey Act of 1900 ESA of 1973. NMFS and USFWS ID and list. Can’t trade, kill, collect, harm etc…must list and make recovery plan!
ESA: Habitat consv plans($ to relcoate, preserve), safe harbor agreements- restore,improve or maintain habitat! Which species get saved and how w/ ESA VIII. Santuaries(refuges,gene banks, bot gardens, &farms) Zoo’s and Captive breeding How? CA condor, black Footed ferret, tamarins