BIOSC 0370 Lecture Notes - Lecture 19: Red Algae, Species Richness, Henry Chandler Cowles
24 Apr 2018
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Document Summary
Important for any good pioneer species: usually make the site more suitable for later species, can survive in challenging environments. Little water & nutrients: climax community, the final seral stage in the process of succession, generally composed of dominant species. Stable, but can change over time: chronosequence, a sequence of communities that exist over time at a given location. It begins with bare soil or rock that is originally devoid of life: krakatau volcano destroyed the island in 1883. Scientists have charted the colonization since: 1st wind dispersed plants, then birds and bats arrived, began dispersing seeds as well. It can begin in diverse habitats: plants that colonize these areas do not require soil and very little water, organic matter produced by them and the weathering of rock fuel. Secondary succession: begins with well-developed soil i. e. fields that have been plowed, ex. Field isn"t used for agriculture for 2 years.
