BIO 1306 Lecture Notes - Lecture 21: Diversity Index, Camouflage, Juncus
Document Summary
Interspeci c interactions between species (competition/herbivory/facilitation) that affect its tness can be positive/helpful (+) negative/harmful (-) or neutral/no effect (0) Competition (-/-) because resources are in short supply. Competitive exclusion, the local elimination of a competing species / these species cannot coexist at the same time. Fundamental niche, the potential niche that a species can occupy. Realized niche, the actual niche that a species can occupy. Ecological niche, an organisms ecological role / biotic and abiotic resources / habitat = address and niche = profession - odum / niche = n- dimensional hyper-volume (space it can occupy) - hutchinson. Resource petitioning, different species can coexist together because of different eco niches. Character displacement, tendency for characteristics to be more diverse in sympatric than allopatric. / defensive adaptations / behavior defenses (hiding/ eeing/ calls/forming herds/etc. ) Batesian mimicry, harmless organism taking advantage of looking similar to a harmful organism by portraying itself to look like it.
