ENSC 320 Lecture Notes - Lecture 7: The Single Factor, Habitat Destruction, Southeast Asia

• School: Queen's University
• Department: Environmental Studies
• Course: ENSC 320
• Professor: Ryan K Danby

Document Summary

Habitat loss and fragmentation: the(cid:455) do(cid:374)"t a(cid:272)t i(cid:374)depe(cid:374)de(cid:374)tl(cid:455) of ea(cid:272)h othe(cid:396) all interact with each other, occurs and is occurring within the context on climate change. Habitat loss effect on wildlife: without habitat, populations decline and eventually species go extinct, has accounted for ca. 50% of recent continental bird extinctions and most plant extinctions. In eastern and midwestern us, less than 25% of native ecosystems remain: only 15% remains unmodified in europe, since beginning of 19th century, 75% of original ontario wetlands south of precambrian. Shield have been lost and less than 20% of total landscape remains in upland forests: many southwestern ontario counties have experienced >90% deforestation. Habitat fragmentation: process where a large expanse of habitat is transformed into a number of smaller patches of smaller total area, isolated from each other by a matrix of habitats unlike the original.