BIO E121 Lecture Notes - Lecture 26: Ruffed Grouse, Plain English, Ozone Layer
Document Summary
Landscape & regional conservation: landscape ecology: study of how spatial arrangement of habitat types affects distribution and abundance of organisms and ecosystem processes, landscape: area containing several different ecosystems linked by exchange of. E, matter, organisms: plain english, how are resources arranged in environment, how does that effect where species and processes are produced, edges and fragmentation, edge: boundaries between ecosystems. Physical conditions differ from either side: fragmentation. > increases edges: habitat broken up into smaller pieces, good for some species use resources from both areas. Example: ruffed grouse uses forest for nesting, shrubs for summer food: effects of fragmentation, generally decreases biodiversity. > only edge-adapted species thrive: movement corridors, narrow strips that connect habitat patches. Promote dispersal: reduce inbreeding (have to be careful can help spread disease, parasites, establishing protected areas, biodiversity hot spots, relatively small area, approx 1. 5% of land area, numerous unique endemic or threatened/endangered species. > 30% plant, amphibian, reptile, mammal diversity: nature preserves.
