BIOL 3130 Midterm: BIOL 3130-Midterm
4 Apr 2017
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Rainforest fragmentation & species loss (belize, central america) Invasion & species loss (vancouver) -ecological meltdown (saskatchewan & montana) Every natural ecosystem has been changed, most profoundly changed. Extinctions, altered functioning of ecosystems, reduced availability of resources, soil erosion. 7+ billion- closer to 9 bill- exponential growth- can"t occur forever. Human may have been responsible for the mega-fauna extinctions in the americas shortly after human colonization from asia about 11 000 yr ago. Barren landscapes of turkey, syria, iraq, iran are unnatural deserts that resulted from massive exploitation of fragile woodlands. Deforestation in europe by the early 18th c, forest areas maintained as private game management. & royal preserves -in great britain may native forests were gone by the 12th c. Se ontario was largely deforested b/t 1800-1900 (trend reversed in ww2) Gradual landscape changes result in profound transformations deforested heavy from the.
