BIOB50H3 Lecture Notes - Lecture 7: Limonium, Photosynthesis, Salicornia
8 Sep 2017
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Document Summary
Physical limiting factors temperature, precipitation (extremes of both) Biological interactions competition, consumption (predation/parasitism), mutualisms/ commensalisms. Niche combination of the physical habitat of a species and its ecological role in that habitat, determined by both abiotic and biotic factors that affect the species. Fundamental niche full range of climatic conditions and food resources that permits a species to survive (absence of interactions with other species) Realized niche species niche in the presence of negative species interactions (interspeci c competition or predation), and positive species interactions (mutualisms or commensalisms) Competition e. g. a grass and wild ower, each loses water, nutrients, and access to sun that the other takes; -/- Predation e. g. foxes bene t from eating lemmings but lemmings lose reproduction; +/- Herbivory e. g. bison bene t from eating grass but grass loses biomass; +/- All of the above are negative interactions because at least one species is harmed; the ones below are positive interactions because they"re both safe.
