Skip to content
Login Register

#island size

3 public questions tagged with this topic.

Biogeography

Larger islands generally support more species due to:

“Lower extinction rates” for larger islands generally support more species due to. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. At equilibrium, species identities can continue to turn over even when richness is approximately stable. The model predicts a balance of rates, not an absence of colonization or extinction. The remaining alternatives—“Higher extinction rates”, “Lower habitat diversity”, “Fewer resources”—refer to different states, processes, or scales and therefore do not express the s

Ref: Biogeography, Lomolino et al., 5th Ed., Ch. 1-4

View Details
Island

Larger islands compared to smaller islands:

“Have lower extinction rates” for larger islands compared to smaller islands. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Island biogeography explains species richness as a dynamic balance between immigration and extinction. Immigration generally declines as an island fills with species, whereas extinction rises as more species divide finite area and maintain smaller populations. The remaining alternatives—“Have higher extinction rates”, “Have lower immigration rates”, “Have less species richn

Ref: The Theory of Island Biogeography, MacArthur & Wilson, Ch. 2-4

View Details
Island

Small islands typically have:

“Higher extinction rates” for small islands typically have. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Larger islands usually support more habitats and larger populations, lowering extinction risk; less isolated islands receive colonists more readily and may experience rescue effects. These mechanisms also apply to habitat fragments that function as ecological islands. The remaining alternatives—“Lower extinction rates”, “Higher immigration rates”, “Increased species richness”—refer to differ

Ref: The Theory of Island Biogeography, MacArthur & Wilson, Ch. 2-4

View Details