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Eco Evo Exam 4(c.19)

Definitions

TermDefinition
Succession The process by which the species composition of a community changes over time.
Seral stage Each stage of community change during the process of succession.
Pioneer species The earliest species to arrive at a site.
Climax community The final seral stage in the process of succession.
Chronosequence A sequence of communities that exist over time at a given location.
Primary succession The development of communities in habitats that are initially devoid of plants and organic soil, such as sand dunes, lava flows, and bare rock.
Secondary succession The development of communities in habitats that have been disturbed and contain no plants but still contain an organic soil.
Facilitation A mechanism of succession in which the presence of one species increases the probability that a second species can become established.
Inhibition A mechanism of succession in which one species decreases the probability that a second species will become established.
Priority effect When the arrival of one species at a site affects the subsequent colonization of other species.
Tolerance A mechanism of succession in which the probability that a species can become established depends on its dispersal ability and its ability to persist under the physical conditions of the environment.
Transient climax community A climax community that is not persistent.
Fire-maintained climax community A successional stage that persists as the final seral stage due to periodic fires.
Grazer-maintained climax community When a successional stage persists as a final seral stage due to intense grazing.
Created by: BriawnaW