4-2 What Shapes an Ecosystem? Ecological Succession Succession changes that occurs in a community over time – Pioneer Species first species to populate the area – Climax Community a stable mature community that undergoes little or no – change in species Two Types of Succession 1. Primary Succession Succession that occurs on surfaces where no soil exists Example: rock surfaces formed volcanoes erupt Secondary Succession Succession following a disturbance that destroys a community without destroying the soil Because soil already exists, secondary succession usually takes less time than primary succession Example: fires, floods, farming, construction, hurricanes, tornadoes
4-2 What Shapes an Ecosystem? Ecological Succession Succession – changes that occurs in a community over time Pioneer Species – first species to populate the area Climax Community – a stable mature community that undergoes little or no change in species Two Types of Succession 1. Primary Succession Succession that occurs on surfaces where no soil exists Example: rock surfaces formed volcanoes erupt Secondary Succession Succession following a disturbance that destroys a community without destroying the soil Because soil already exists, secondary succession usually takes less time than primary succession Example: fires, floods, farming, construction, hurricanes, tornadoes
Notes%20Ch%203.docx