BIO120H1 Lecture Notes - Lecture 15: Climax Community, Pioneer Species, Superorganism
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BIO120H1 Full Course Notes
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Ecological equilibria- idea that natural communities will tend to settle into stable configurations if left undisturbed. Frederick clements: community responds to disturbance by inevitably going through a predictable development sequence that ended with community achieving a stable climax configuration. Changing communities are easier to see than stable ones: change can proceed toward multiple endpoints, and sometimes a cycle. 15. 1 the concept of the sere includes all the stages of successional change. Within particular region, succession will always proceed to same stable climax composition, regardless of starting point (not application to all regions) Secondary succession: regeneration of community following a disturbance, rapidly follows a disturbance that leaves some organisms in place, reseeding initiates a secondary sere, type of disturbance and size of gap it creates influences which species become established first. Some plants require abundant sunlight for germination and establishment and their seedlings are intolerant for competition from other species. Consumers affect course of succession and trophic structure of community.
