ANTHROPOGENIC ENVIRONMENTS & NON-EQUILIBRIUM ECOLOGYTopics for this lecture:1) Basic concepts of ecological dynamics & succession2) Equilibrium vs. non-equilibrium paradigms3) Anthropogenic environmental change:Ecological dynamics: basic conceptsEcological community: set of species (flora & fauna) inhabiting a given placeSuccession: change in community composition over time (e.g., following a disturbance)Ecological disturbance: major perturbation (in species composition, ecosystem function, etc.)–Disturbance agents = fire, wind, volcanism, etc. (see below for more)–Disturbances vary in magnitude and frequency–Intermediate-level disturbance regime continually "resets" the succession cycle in small areas ("patches")–This results in a shifting “patch mosaic” at the landscape scalePatch mosaic= set of habitat patches differing in species composition, age since disturbance, etc.–Mosaics classified by patch size & degree of heterogeneity (“coarse-grained, fine-grained”)Ecological succession
This is the end of the preview.
access the rest of the document.