BSC 3052 Lecture 8: Con Bio Ch 8 and 9
Document Summary
Excessive burning and/or wildires (due to not. Deforestaion: clearing the land of trees and large shrubbery for: Agriculture has been responsible for more habitat loss than any other human acivity. The new agricultural threat: biofuels: huge expansion of agricultural lands into natural habitat and formerly abandoned agricultural areas that could be restored to natural condiions, potenial threat to world food supply. Deforestaion: signiicant loss of plant biodiversity, loss of carbon sinks , produces carbon, erosion and deseriicaion, water cycles afected when deforestaion is signiicant. Draining and dredging: primarily afecing our smallest in size, yet most important aquaic biomes: wetlands, rivers, interidal zones. Siling, stripping vegetaion, drying out wetlands (local exincion of wetland plants and animals) Fragmentaion: modiicaion or degradaion (e. g. roads and dams) result in habitat fragmentaion, as fragment size and isolaion increases, biodiversity decreases, edge efects: raio of edge (perimeter) to area changes disproporionately.
