BIOLOGY 1M03 Lecture Notes - Lecture 20: Krakatoa, Species Richness, Sockeye Salmon

• School: McMaster University
• Department: Biology
• Course: BIOLOGY 1M03
• Professor: James S Quinn

Document Summary

Other interspecific interactions: anti-predator strategies: o group living more eyes/dilution effect/mobbing o crypsis o aposematic colouration o mimicry batesian o mimicry - m lleria(cid:374) Keystone species: productivity sockeye salmon o hippopotamus (hippopotamus pro(cid:448)ide (cid:374)utrie(cid:374)ts to s(cid:373)all lakes produ(cid:272)ti(cid:448)it(cid:455)(cid:895) Keystone herbivores o prairie dogs: keystone predators o starfish o wolves. Gleaso(cid:374) individualistic hypothesis --the community is a chance assemblage of species with similar habitat requirements. Santa catalina mountain trees support the individualistic hypothesis: f. e. See experimental work on planktonic communities in freeman et al. Some members of communities are bound in various types of interactions (i. e. , clements. Many members of communities share habitats or ecosystems in common because of limits of tolera(cid:374)(cid:272)e or (cid:374)i(cid:272)he di(cid:373)e(cid:374)sio(cid:374)s (cid:894)i. e. , gleaso(cid:374)"s i(cid:374)di(cid:448)idualisti(cid:272) h(cid:455)pothesis(cid:895) Ecological succession and disturbance: communitie are not tatic, ecological succession: non-seasonal and directional pattern of colonisationand extinction on a site by different species, pri(cid:373)ary successio(cid:374): begi(cid:374)s (cid:449)ith a (cid:448)irtuall(cid:455) (cid:862)lifeless(cid:863) e(cid:374)(cid:448)iro(cid:374)(cid:373)e(cid:374)t.