ENVS200 Lecture Notes - Lecture 4: Marine Life, Biological Interaction, Estuary
15 Jun 2015
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Occurs when the magnitude of stress is sufficient to cause a change in the community, could be a major or minor, frequent or infrequent (stability) A disturbance is an event that causes destruction of some part of a community or of a larger ecoscape. Disturbance is followed by a process of community leveled recovery called succession. The community may or may not resemble that which existed prior to the disturbance. Newly available habitat is colonized, composition of a community changes through time following the disturbance. Varies in frequency depending on the stability of the habitat. Toppling of a single tree in a forest. In algonquin park experimentally created clearings within the forest. Plants and animals different in the gaps, creating more biodiversity. The gaps support plants that would not occur elsewhere, including red raspberry, provides forage. Scale is still variablecould be a few hectares, or thousands of square km.
