Study

Ecological Succession & Environmental Impact

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  • Climax Forest: 50–100+ years, Stable forest with mature trees and rich ecosystems
    forest fire
    volcanic eruption
    abandoned farmland
  • Weedy Field: 0–1 year, Annual weeds, disturbed soil, returning insects
    abandoned farmland
    volcanic eruption
    forest fire
  • The first organisms to colonize a barren environment.
    Climax community
    Pioneer species
  • The natural process by which ecosystems change and develop over time.
    Primary succession
    Ecological succession
    Secondary succession
  • Climax Community: 200+ years, Mature forest, high biodiversity, rich ecosystem
    abandoned farmland
    forest fire
    volcanic eruption
  • Early Succession: 10–50 years, Grasses, ferns, basic soil, insects
    abandoned farmland
    volcanic eruption
    forest fire
  • Intermediate Stage: 50–200 years, Shrubs, young trees, more animals, better soil
    volcanic eruption
    forest fire
    abandoned farmland
  • Post-Fire Landscape: 0–1 year, Burned remains, ash-enriched soil, some survivors
    forest fire
    volcanic eruption
    abandoned farmland
  • A stable forest of large trees and complex food webs exists
    Climax community
    Late succession stage
    Primary succession
    Secondary succession
  •  A forest regrows after a wildfire
    Climax community
    Late succession stage
    Primary succession
    Secondary succession
  • Grass and Herbs: 1–5 years, Perennial plants, better soil, more animal life
    volcanic eruption
    forest fire
    abandoned farmland
  • Shrub/Young Trees: 5–20 years, Shrubs, fast-growing trees, returning wildlife
    volcanic eruption
    abandoned farmland
    forest fire
  • Mosses and lichens break down rock to form soil
    Climax community
    Late succession stage
    Primary succession
    Secondary succession
  • What is the main difference between primary and secondary succession?
    Secondary succession only occurs in rainforests
    Secondary succession starts with no soil
     Primary succession happens faster
    Primary succession starts from bare rock
  • Succession that begins in a place with no soil.
    Primary succession
    Ecological succession
    Secondary succession
  • Climax Forest: 50–100+ years, Stable forest, mature tree species, full ecosystem
    abandoned farmland
    forest fire
    volcanic eruption
  • Young Forest: 15–50 years, Tree canopy forms, more shade-tolerant species
    abandoned farmland
    volcanic eruption
    forest fire
  • What role do decomposers play in ecological succession?
    Pioneer species begin to break down rock and start soil formation.
    The environment has little biodiversity and limited resources at first.
    Biodiversity increases over time as more complex organisms can survive
    Decomposers recycle nutrients from dead organisms, enriching the soil
  • Shrub Stage: 5–15 years, Shrubs and young trees, growing diversity
    volcanic eruption
    abandoned farmland
    forest fire
  • How does biodiversity change as succession progresses from early to late stages?
    The environment has little biodiversity and limited resources at first.
    Pioneer species begin to break down rock and start soil formation.
    Biodiversity increases over time as more complex organisms can survive
    Decomposers recycle nutrients from dead organisms, enriching the soil
  • Young Forest: 20–50 years, Developing canopy, more biodiversity
    forest fire
    volcanic eruption
    abandoned farmland
  • Pioneer Stage: 0–10 years, Bare rock, lichens/mosses, no soil
    volcanic eruption
    forest fire
    abandoned farmland
  • How does the early stage of succession affect the environment?
    The environment has little biodiversity and limited resources at first.
    Biodiversity increases over time as more complex organisms can survive
    Decomposers recycle nutrients from dead organisms, enriching the soil
    Pioneer species begin to break down rock and start soil formation.
  • Which of the following is most likely to be a pioneer species in primary succession?
    Oak tree
    Deer
    Grasshopper
    Lichen
  • A stable, mature ecosystem that undergoes little change in species composition.
    Pioneer species
    Climax community
  • Pioneer Stage: 1–5 years, Grasses, wildflowers, quick regrowth, insects
    abandoned farmland
    volcanic eruption
    forest fire
  • Succession that occurs in areas where a disturbance has happened but soil remains.
    Primary succession
    Secondary succession
    Ecological succession
  • A lava flow cools and forms bare rock
    Primary succession
    Secondary succession
    Late succession stage
    Climax community
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