Unformatted text preview: o communities change over time?
Models of succession: Relay floristics
nalogy of running
x: weed —> grass
—> shrub —>trees Frederick Clements (1930s), Frank Egler (1950s) How do communities change over time?
Relay floristics model
• Environment changed by
• Less suitable for
• More suitable for new
species ex: moss+shrubs ex: small trees +
ex: forest Connell & Slatyer (1977) Am. Nat. 111:1119 7 Initial Floristic model
-Assumes that all species exist w/in community already exists in the area
that the species all come in very shortly after the start of primary succession How do communities change over time?
Model of succession: Initial floristics T Te SHIFTING DOMINANCE Frank Egler (1950s) How do communities change over time?
Mechanisms of initial floristics: inhibition
• Early occupants modify the environment to prevent
establishment of other species
• Succession occurs o...
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- Fall '12
- Ecology, Ecological succession, Primary Succession, Glacier Bay