Notes Lecture 8 - 4. Parsitism(+/-) a. Well-adapted...

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Notes Lecture 8 Population ecology Biological community – an assemblage of interacting species Integrated hypothesis – a community assemblage of closely linked species locked into association by mandatory biotic interactions Individualistic hypothesis – community are loosely organized associations of independently distributed species with the same abiotic requirements Gaia Hypothesis – Earh is “superorganism” with tightly couple feedback loops 1. Competition(-/-) a. Competitive Exclusion – species with same niches cannot coexist b. Resource Partitioning – allows coexistence by different niches c. Fundamental Niche(could ) vs. Realized Niche (Actually) 2. Predation(+/-) a. Coloration: Cryptic = warns b. Batesian mimicry – harmless mimics harmful species c. Mullerian mimicry – harmful mimics harmful species 3. Herbivory(+/-) a. Plant defenses – mechanical, chemical
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Unformatted text preview: 4. Parsitism(+/-) a. Well-adapted parasites b. Often host specific (Greenland Sharks) c. Can manipulate in many ways (Grasshoppers) i.e Toxoplasma less fear d. Parasitoids explodes out of host i. Hyperparasitoids parasitoid of parasitoid ii. Autoparasitoid lay female eggs in different species iii. Polyembrony 1 egg = 1000s different rolls i.e queen & soldiers 5. Difference between Predators parasite etc. a. Predators kill many b. Parasitoid kill one c. Parasite doesnt really kill but rather live in host 6. Mutualism (+/+) i.e Acacia & ants 7. Commensalism(+/ not affected) i.e cows and birds 8. Different types of Species a. Dominant Species (#), Keystone Species (Vital role), Foundation (Beavers) 9. Species Diversity dependant on two factors: Richness & relative abundance...
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