FOR200H1 Lecture Notes - Lecture 3: Net., Marbled Murrelet, Vancouver Island Marmot
Document Summary
For200 lecture 3 - the biodiversity crisis and policy solutions to protect and recover. 17,000 species are now at risk of extinction. 65 species no longer exist in the wild. Major causes of the biodiversity crisis: the alteration, fragmentation, or destruction of species habitats by humans, overexploitation of species, including logging, introduction of exotic species into ecosystems where they aren"t native. Nonnative species can outcompete local species for resources: global climate change. Climate change alone might commit 15-37% of species to premature extinction within the next 50 years, Humanity in the long-term is dependent on the maintenance of the world"s biodiversity. Ecosystem services are currently being degraded or used unsustainably. (cid:1152) of the benefits to society are from ecosystems. 4-year global effort to inventory and assess the state of the global environment. Conclusions were a warning for the earth, Continued biodiversity declines will have serious consequences for human species because humanity is dependent on the maintenance of the world"s biodiversity.
