BIOL 2Q04 Lecture Notes - Lecture 2: Soil Structure, Ideal Free Distribution, Apple
2 Dec 2015
School
Department
Course
Professor
Document Summary
Why are some individuals of a species present in some places but absent from others? o. An example is the spread of african honey bees in americas since 1956-aggressive to humans and animals but why not in. Species could grow even in open field. Did not do well in oak forest. Distribution limited either because the area is inaccessible, time has been too short to reach the area or because the species fails to recognize the area as suitable living space. Distribution limited either by other species or by physical and chemical. How species react to physical and chemical factors. Shelford"s law of tolerance: distribution controlled by the factor with narrowest range of tolerance. Determination of the critical thermal maximum and minimum temperature in fish. Idealized plot of shelford"s law of tolerance with 2 factors. Example: copper tolerant populations of agrostis tenuis or cypress. Species can gradually adjust to new conditions o species.
