Lecture 26 - SPECIES RICHNESS - the number of species...

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BIOLOGY 1001: LECTURE 26 ENDEMISM - being restricted to a particular geographical location INBREEDING DEPRESSION - the loss in fertility and viability of offspring born to parents that are close genetic relatives INCIDENCE - the presence of a particular species in a certain area ISLAND BIOGEOGRAPHY - patterns of species richness as a function of island size and location SPECIES DIVERSITY - the number and relative abundance of each species in a biological community
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Unformatted text preview: SPECIES RICHNESS - the number of species living in a biological community Habitat destruction increases extinction rates by: 1.Outright loss of habitat of endemic species 2.Habitat fragmentation a.Small populations are subject to higher risk by chance events (floods, fires, epidemics, etc.) b.Small populations are subject to inbreeding depression Value of biodiversity: 1.Alternative forms of food 2.New medicines 3.Greater resilience in the face of natural disaster...
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This note was uploaded on 01/20/2010 for the course BIOL 1001 taught by Professor Fall during the Fall '08 term at Minnesota.

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