BIOLOGY 2F03 Chapter Notes - Chapter 17: Ecophysiology, Cleaner Fish, Fynbos
22 Sep 2016
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Chapter 17 - species interactions and community structure. Ecological networks: description of the interactions that occur among co-occurring species in a community. Based on ecological process in which organisms participate in. Community assembly rules: can occur within or across trophic levels, and describe the processes that limit or promote coexistence. Originally presented as a specific set of rules that governed what species could, or not co-occur now used in a more general way. 17. 1 - ecological networks across trophic boundaries: food webs. Incorporate aspects the biology of the organisms & the direction of movement of energy and resources within or between communities. Primary producers: terrestrial plants and aquatic algae: feed on: terrestrial & aquatic invertebrates. Arctic foxes feed on marine mammals and dung of polar bears. Food webs are said to be incomplete because people focus more on the larger organisms in the systems. Polar bears eat seals and beached marine mammals.
