ENSC 320 Lecture Notes - Lecture 7: Canadian Shield, Microclimate, E. O. Wilson
22 Aug 2016
School
Department
Course
Professor
Document Summary
Process by which natural habitat is rendered ineffective in supporting the community of species once found there. Human foot print extends all around the world very few areas in the world where human influence has not been felt. Without habitat, populations decline and eventually species go extinct. Has accounted for 50% of recent continental bird extinctions and most plant extinctions. Doesnt all occur at once and in one place if it did human response would be more dramatic i. e loss of a couple hectares here, hectares there. Habitat loss not just tropics 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 greater than 90% deforestation. Species-area relationship species abundance and diversity are area dependent.
