Ch. 21.3 Community Ecology pp.406-408 Succession= the gradual, sequential regrowth of a community over time after some disturbance Primary succession= establishment of a community in a barren area Primary = first Bare rock, sand dune, lava flow (“starting from scratch”) No soil present Pioneer species = fast- growing, first to move in Grasses, lichens; often wind- blown Ch. 21.3 Community Ecology pp.406-408

Ch. 21.3 Community Ecology pp.406-408 Secondary succession= reestablishment of species in an ecosystem After some disturbance There is an existing seed bank and soil, so quicker than 1’ Ch. 21.3 Community Ecology pp.406-408 1’ = primary 2’ = secondary

Ch. 21.3 Community Ecology pp.406-408 In succession, the community advances through predictable stages of maturity that results in a change in the species of the community - soil thickness ↑ -species richness↑ -biomass ↑ - species change - predictable pattern Ch. 21.3 Community Ecology pp.406-408

Ch. 21.3 Community Ecology pp.406-408