{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Ch 53 - Primary Succession – lifeless are where no soil...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Ch 53 Ch 53.1 Features of Community Structure: (species diversity and feeding relationships) Species Diversity – diff. organisms that make up the community with 2 components o Species Richness – total number species in the community o Species Abundance – proportion each species represents the individuals in comm. Trophic Structure – feeding relationships Reasons food chains are short o Energetic hypothesis - inefficiency of energy transfer along the chain. o Dynamic Stability hypothesis – Keystone species are not as abundant as Dominant species. Bottom-up Model – V H Lower to higher trophic levels. N->V->H->P N=nutrients Top-down Model = Trophic cascade model (opposite)
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Primary Succession – lifeless are where no soil has formed Secondary Succession -soil is intact after disturbance. 53.4 Factors correlated with a community’s species diversity are its geographic locations and size. Tropical habitats support more species than do temperate and polar regions. Factors in equatorial-polar gradients of species richness are evolutionary history and climate. Climate is likely the primary cause of the latitudinal gradient in biodiversity. o Solar energy input and water availability Evotransporation – water loss from soil and plants 53.5 Individualistic vs. integrated – (plants vs. animals)...
View Full Document

{[ snackBarMessage ]}