ENH 617 Study Guide - Midterm Guide: Reproductive Isolation, Ecological Succession, Indicator Species

• School: Ryerson University
• Department: Environmental Health
• Course: ENH 617
• Professor: Anne Harris

Document Summary

Living off earth"s natural income, without depleting or degrading earth"s natural capital. No energy created nor destroyed (1st law of thermodynamics) Flow of energy from sun through biosphere. One way flow of high quality energy. Cycling of nutrients through parts of biosphere. Cycles within and among ecosystem and biosphere. Found in species, genes, ecosystems, ecosystems processes. Speciation one specie splits to 2 or more species. Geographic isolation physical isolation for long period. Differences in average annual precipitation and temperature leads to formation of tropical, temperate, cold desserts, grasslands, forests. Availability of light and nutrients necessary for photosynthesis. Healthy coral coral and algae depend on each other to survive. Stressed coral if stressed, algae leaves coral. Species play specific ecological role called niche. Predation feed on live organisms of other species. Parasitism feed off other species by living in or on them.