University:
Washington State University
Course:
BIOLOGY 120 | Introductory Botany
Academic year:

2021
Views:

342

Pages:

1
Author:

gewoekerdodx

● ● ● ● ● Ecology Succession 2 main types of ecology successions ○ Primary → Process of creating life in an area where no life previously existed ○ Secondary → Process of re stabilization that follows a disturbance in an area where life has formed an ecosystem Primary succession ○ Started from simple lifeforms to complex ○ Starts with a barren environment ○ Development of a community in an area that had no real life before ○ Begins in a place without any soil ○ Lichens begin to grow on rocks then break them down into sand over many years ○ Weather and erosion also do this ○ Plants that do not require soil → Pioneer species ■ Often first to colonize and can evolve into a more complex species ○ When lichens die decomposers break them down into soil by enriching the sand ○ Nitrogen cycle begins ○ Climax communities are at the end of primary succession ○ Threats to climax communities are fires, natural disaster and human intervention Secondary succession ○ Organisms are destroyed but soil is safe ○ Soil already contains seeds for weeds trees and grass ○ Larger shrubs come ○ Fast growing trees then slow growing trees ○ Climax communities are stable plants that continue to grow there Invasive plants ○ Can displace other native plants

Ecology Succession - Detailed Notes

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