GEOG 3110 Lecture Notes - Lecture 17: Superorganism, Catholic Integrated Community, Seral Community

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Clements communities behave like a super organism. Gleason individualistic that share common environmental tolerances. By focusing on plant communities are we missing other essential interactions? herbivores. Rivet popping hypothesis sometimes has an effect, depends on positive interactions with other species. Parasitism when you lose the tree, you lose the host specific parasite as well. Adaptations to extreme environments serpentine soils, bog environments. Trees at edge of mountains top of hill on flat surface gets the water, strong gradient in abiotic factors, sharp boundary occurs, slope is steep water will run down. Grasses grow from the bottom up, trees grow from top up. Conifers stop growing if cut off top, embryonic cells gone. Disturbance fires give distinct community types, even more true for crown fires. Traditional view of disturbance: catastrophic event originating in the physical environment that initiates succession. If you accept disturbance, you must reject succession. Jack pine forest (serotinous cones) chapparal (resinous leaves)

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