BIOB50H3 Lecture Notes - Lecture 18: Alliaria Petiolata, Niche Differentiation, Species Richness
Document Summary
Regional species pool provides an upper limit on the number and types of species that can be present in a community. The importance of dispersal can be seen in case of non-native species invasions. Regions of high species richness, tend to have high local richness. 2) a species may be able to reach a community but be physiologically unable to tolerate the abiotic conditions of the environment. Some abiotic constraints are obvious (e. g. fish on land or more subtle; a lake might not support organisms that require fast-flowing water) 3) the final cut requires coexistence with other species for species that depend on other species for growth, reproduction or survival, those other species must be present. Neutral theory (controversial: individual traits are insignificant. Resource partitioning among species in a community reduces competition and increases species richness. Figure 18. 7: each curve reps diff species, indicates the different types of resource and not amount, narrow resource spectrum:
