BIO120H1 Study Guide - Final Guide: Biome, 2 On, Epilimnion

• School: UTSG
• Department: Biology
• Course: BIO120H1
• Professor: don'tknow

Document Summary

William cronon, uncommon ground: nature tends toward a self-restoring equilibrium when left alone; the balance of nature . In the absence of human action, nature exists in a pristine state. Population approach: population dynamics (age, sex, number etc. ) Biosphere approach: movement of air and water (ocean current, wind etc. ) Temporal variation: environment change over time, intrinsic (fire cycle) or extrinsic (disease) Spatial variation: patchiness , the faster it moves, the smaller the scale of spatial, & temporal variation. The introduce perch annihilated the natural cichlid populations, driving many unique species to extinction, destroying the native fishery, and severely reducing its own food supply. Sea otters" recovery caused the availability of sea urchins and such to decrease, while letting the kelp forest harvest; orcas are seeking sea otters as an alternative food source as regular prey population declines. Equilibrium water vapour pressure: <100kpa evaporation, >100kpa precipitation. Hadley circulation: hadley cell (intertropical convergence) -> ferrel cell (subtropical high-pressure belts)