UNI101Y1 Study Guide - Sphagnum, Bog, Secondary Succession
16 Feb 2013
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Bio120h lisa zhao 2011 | page 2. Detritus produced by sedge mat accumulates at pond bottom (anaerobic, thus no microbial decomposition occurs down there) As a bog accumulates sediments and detritus, sphagnum moss and shrubs establish along edges. Black spruce and larch birch, maple, fir. Over thousands of years, aquatic habitat becomes terrestrial as organic detritus accumulates and soil rises above water table. Sseeccoonnddaarryy ssuucccceessssiioonn: succession in a habitat that has been disturbed, but in which some aspects of the community remain. Even when reseeding initiates a secondary sere, the type of disturbance and size of gap it creates influences the first species to establish. Disturbance and recovery occur quickly in marine habitats. Marine invertebrates have inversely related colonizing and competitive abilities. On rock occupied by sessile invertebrates and; Filled in quickly by tunicates and sponges (highly successful competitors) Bryozoans and polychaete larvae attempted to colonize but were overgrown.
