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Define succession.
The process by which species composition of a community changes over time.
Define seral stage.
Each stage of community change during succession.
Define pioneer species.
The earliest species to arrive at a site; typically are able to disperse long distance and arrive quickly at disturbed sites.
Define climax community.
The final seral stage in the process of succession; generally composed of organisms that dominate in a given biome.
Define a chronosequence.
A sequence of communities that exist over time and a given location.
Define primary succession.
The development of communities in habitats that are initially devoid of plants and organic soil such as dunes, lava flows and bare rock.
Define secondary succession.
The development of communities in disturbed habitats that contain no plants but still contain organic soil e.g., ploughed fields or forests uprooted by a hurricane.
Define priority effect.
When the arrival of species at a site affects the colonization of other species; often occurs through inhibition.
Define 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.
What are transient climax communities?
A climax community that is not persistent; occurs when a site is frequently disturbed so a climax community cannot persist.
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