GEOG 1010 Lecture 20: Lecture20
Document Summary
A science that looks at the distribution/interaction between plants & animals , from a very holistic (broad) view. Abiotic environmental factors that influence organisms (not consumed) Light availability is important in determining plant distribution patterns. Photoperiod: seasonal changes in light (often triggers biological processes) Lecture 20 page 1 biological processes) b. c. Each species is able to exist & reproduce successfully only within a range of values for a particular environmental factor. Ecological niche concept: total structural and functional role of a species in an ecosystem. When thinking of ecological niche, need to think of the resources required, how it acquires them and the interactions it has with other parts of the ecosystem. Need to look at the combined tolerance ranges for all the environmental factors that effect it. Species with overlapping ecological niches interact in 1 of 3 ways: i. ii. iii.
