BIOL 3130 Lecture Notes - Lecture 2: Alpha Diversity, Crisis Management, Anthropocene
23 Feb 2018
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1 (1= every species is identically abundant: diversity (scientific definition): the proportional abundance of species (combo of evenness & richness) Note: the number of species alone hides important ecological info. Rarity enigma: there is always an abundance of rare species (rank abundance curve) (bad) vulnerability: demographic and environmental stochasticity (good) density-depe(cid:374)de(cid:374)t (cid:858)rarity advantages(cid:859) Genetic diversity: allelic diversity of genes, possible combinations are enormous, variability as the source for speciation & future changes, we rarely conserve genetic diversity . or e(cid:448)e(cid:374) k(cid:374)o(cid:449) ho(cid:449) (cid:271)est to do this (cid:894)see florida panther case) Composition: the genes, species, and habitats found at a time and place. 2 areas can have identical # of species, but completely different compositions (beta diversity: beta diversity: difference in composition of one environment compared to another- amount of change b/w 2 anvironments. Many species can be morphologically distinct yet functionally very similar. Habitat diversity: habitat can differ in structure, but similar composition (old vs clear-cut forest)
