ENWC314 Lecture Notes - Lecture 10: Apex Predator, Prey Switching, Dall Sheep
27 Nov 2016
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What is the primary factor limiting abundance of pops: predation. It can reduce abundance primary factor: detritivore-an organism (as an earthworm, a bacterium, or a fungus) that feeds on dead and decomposing organic matter. Predator: secondary consumer, eats all or part of a second animal species, may be carnivore or parasite, some organisms change trophic group during life. Can depend on life cycle patterns; change feeding habits as they age: predator may be mobile or immobile. Kinds of secondary consumers: predator-feeds on several individuals in its lifetime and kills its host quickly. Even insects can feed on animals typically mobile: parasitoid-feeds on a single individual and kills its host after it has completed development. Kills prey slowly; eats parts of the animal as it matures. Once grown, they have consumed the host well thus the host dies: parasite-an organism that grows, feeds, and is sheltered on or in a different organism but does(cid:374)"t (cid:272)o(cid:374)tri(cid:271)ute to host"s sur(cid:448)i(cid:448)al.
