Biology 2483A Lecture Notes - Lecture 8: Spatial Scale, Cooperative Breeding, Monarch Butterfly

• School: Western University
• Department: Biology
• Course: Biology 2483A
• Professor: Hugh Henry

Document Summary

Abundance reported as: population size, population density. Big differences in terms of disperse distance for different species. When you define populations, if they still have interaction, then counted as one population. See diff stems above ground but joined underground. Two species characteristic of n. american deserts: creosote bush, saguaro cactus. A lot of risks involved in biological control e. g. introducing a moth that eats cacti in australia. Competition w/ other barnacles determined range of species. Some species depend on disturbances; adaptations to fire. For aphids, there"s an advantage of being able to disperse if they get overcrowded. Monarch butterflies migrate to one specific small geographic region in mexico in the winter. Some species, density all over the place (e. g. red kangaroos) Some species follow the model (crowded in the center and density reduces as it gets away from the centre: regular- limited by water availability but water evenly distributed, random, clumped most common clumps of resources.