13738465
Description
Flashcards by Phoebe Hills, updated more than 1 year ago
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Created by Phoebe Hills
over 6 years ago
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| Question | Answer |
| Causal mechanisms; Competition | -Niche seperation/ resource parititioning -Exploitive/interference e.g. Desert horned lizards on different continents |
| Ecomorphs | A group of several species with the same structural habitat/niche, similar in morphology but not necessarily phyletically e.g. Greater Antillean Anole ecomorphs -Niche speration on 3 axis |
| Causal mechanisms; Habitat complexity | Increased opportunity for niche separation. Patchiness is also important e.g. Kopjes pancake tortoise & Mwanza flat-headed lizard |
| Causal mechanisms; Predation (Paratism | -Can influence competition, behaviour & life history - Avoidance of parasitism genetic e.g A. pogus &A. ginivinus with malaria - Co-evolution between parasite & host affects outcome |
| Causal mechanisms; Physiological tolerances | -May change ONTOGENETICALLY, seasonally, with reproductive status E.g. Hurricane Hugo effect on Puerto Rican anoles |
| Causal mechanisms; historical | -Biogeography -Climatic history; PLEISTOCENE GLATIATION -Phylogenic effects -Evolutionary constraints; unequal probability of trait gain & loss -Neutral models |
| Causal mechanisms; Environmental stochasticity/predictability | Predation susceptability & competitive ability changes with growth E.g. larval anuran assembalages |
| Significance of herps in communities | - small body size allows niche occupation -High assimilation & high conversion HOMEOTHERMS; assimilation high, low production to consumption ratio POILKILOTHERMS; assimilation equal to production |
| 3 axis of niche seperation | -Perch -Size -Climate |
| Greater Antillean Anolis; A. sagrei | Cuba Sympatric with 12 other spp; resulting in narrowing of resource use If species is removed = broadening of resource use --> ECOLOGICAL RELEASE |
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