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#inhibition model

3 public questions tagged with this topic.

ECOLOGICAL SUCCESSION

Which statement is true for early species in inhibition model?

Early residents in the inhibition model monopolize limiting resources or space and thereby prevent later species from establishing. Their priority advantage can persist regardless of whether the later arrivals would be superior competitors in an unoccupied site; turnover follows mortality or disturbance of incumbents. Organisms can drive succession autogenically by changing their own habitat, while floods, erosion, sedimentation, or climate can drive allogenic change. Biological agents such as grazers and pathogens may also redirect succession by altering competitive relationships. Distinguish

Ref: Ecology: Concepts and Applications, Molles, 9th Ed., Ch. 20

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ECOLOGICAL SUCCESSION

Which model states that early species hinder the establishment of later ones?

Under the inhibition model, established early colonists suppress recruitment or growth of later arrivals through preemption of space, resource capture, allelopathy, or other antagonistic effects. Replacement occurs chiefly when residents die or are damaged, releasing occupied sites rather than because they prepare the habitat for successors. Successional trajectories emerge from dispersal, establishment, species interactions, and organism-driven environmental change. Priority effects can make arrival order important, while retained soil and propagules strongly accelerate recovery after disturb

Ref: Ecology: Concepts and Applications, Molles, 9th Ed., Ch. 20

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SUCCESSION

In inhibition model of succession:

The inhibition model gives early occupants a negative effect on later colonists. Once pioneers establish, they monopolize space, light, nutrients, or attachment sites, or they release inhibitory chemicals, thereby preventing other species from recruiting successfully. Succession proceeds mainly when residents die, are damaged, or are removed by consumers or disturbance, creating openings that another species can occupy. The first colonist need not prepare the site for its successor and may even be a long-lived species, so the sequence depends strongly on arrival order and priority effects. In

Ref: Ecology: Concepts and Applications, Molles, 9th Ed., Ch. 20

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