BIO120H1 Chapter 7: Struggle for Existence Part VII
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BIO120H1 Full Course Notes
Verified Note
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Document Summary
De nition of ecological community: all of the organisms or the biotic entities in some spatially de ned locality: ecosystem would be including all of the abiotic components (ex. atmosphere, weather, hydrology, mineral nutrients, etc. Community study is a subset of the species in a local ecosystem, separated into two: taxonomically-de ned, functionally-de ned! Guild level: organisms with the same guild level have similar functional niches! Population ecology > abundances and age structure ! Community ecology > number of species present (species richness) and the abundance of each of them! Communities: have a few species that are very common (the dominants), many species that are rare, distribution of abundance and rarity determines species diversity! Ex. community with ten equally abundant bird species is more diverse than one with one common bird species and nine rare ones! Primary productivity: functional biological property of communities, ex. how much plants growth occurs, biochemical variables!
