BISC 100 Lecture Notes - Lecture 19: Germination, Semelparity And Iteroparity, Biogeography

• School: Simon Fraser University
• Department: Department of Humanities Biological Sciences
• Course: BISC 100
• Professor: Onkar Bains

Document Summary

Ecology: the scientific study of interactions btw organisms & environment. Biosphere > ecosystem > community > population. 3 different types of species dispersion (the manner in which individuals in a popu are dispersed in space at given time) Social predisposition clumped spacing groups & inability of offspring move from habitat independently. No social groups (neither attack, nor repel) Occur in consistent environmental condition & resources. Example: dandelions & plants that have wind-dispersed seeds, oyster larvae can travel # by sea currents. Common among individuals defending scarce resources/ territories. Help to ensure adequate resources for everyone. Example: penguins exhibit uniform spacing by aggressively depending tehir teritory among neighbors, plants that undergo allelopathy excrete chemicals that can affect the growth & germination of other plants that compete for same resource. Quadrat analysis (immobile organisms: plants/ sedentary animals) N = m * c / r. Biogeography: the study of the distribution of species & ecosystem in geographic space & through time.