ENV100Y5 Lecture Notes - Lecture 33: Habitat Destruction, Invasive Species, Bioaccumulation
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ENV100Y5 Full Course Notes
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Document Summary
Chapter 9 - part 3. Sunday, november 22, 2015. Exploitation (taking organisms out the env) - 37 % Habitat degradation & change - 31 % Habitat loss - 13 % Climate change - 7 % Invasive species - 5 % Trade in endangered species (ie. shark fins) Only 50 years left" for fish stocks (science: oct 2006) Loss of biodiversity is driving collapse of fisheries - also the taking of non- target organisms (ones that get caught on) Forests are home to 90% of terrestrial species (critical habitat to maintain) 80% of world"s forests are degraded or destroyed. Invasive species: - agriculture: losses of - billion annually. Arrive in a new env and end up taking offb bc nothing eats it (ex. Feral cats - bad bc they kill song birds, ground nesting birds, turtles, bats. 26 fold increase in amount of agricultural pesticide use in last 50 years.
