#island ecology

Biogeography Complete

Insular biogeography' specifically refers to studying:

“Island ecosystems” for insular biogeography' specifically refers to studying. 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—“Continental ecosystems”, “Forest ecosystems”, “Marine ecosystems”—refer to different s

Ref: Biogeography, Lomolino et al., 5th Ed., Ch. 5-8

View Details

Biogeography Complete

Which island typically has the highest immigration rates?

“Large, near mainland” for which island typically has the highest immigration rates. 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—“Large, far from mainland”, “Small, near mainland”, “Small, far from main

Ref: Biogeography, Lomolino et al., 5th Ed., Ch. 5-8

View Details

Biogeography

Insular biogeography specifically studies:

“Factors influencing species richness on islands” for insular biogeography specifically studies. 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—“Genetic diversity”, “Animal behavior on continents”, “Marine

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

View Details

Biogeography

Why might distant islands have fewer species?

“Lower immigration rates” for why might distant islands have fewer species. 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—“Higher competition”, “More abundant resources”, “Greater species richness”—refer to diffe

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

View Details

Biogeography

What is a habitat island?

“Any isolated habitat separated from similar habitats” for what is a habitat island. 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—“An oceanic island”, “A large continent”, “A freshwater lake”—refer to different states, processes, or scales and therefore do not express the same caus

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

View Details

Biogeography

According to the theory, species diversity on islands is:

“Dynamic and balanced” for according to the theory, species diversity on islands is. 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—“Fixed and constant”, “Decreasing continually”, “Increasing continually”—refer to

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

View Details

Biogeography

Immigration rates are highest on islands:

“Near and large” for immigration rates are highest on 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—“Distant and large”, “Near and small”, “Distant and small”—refer to different states, processes, or sca

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

View Details

Biogeography

Which factor does NOT directly influence species immigration rates?

The keyed exception is “Island vegetation type.” In the context of which factor does not directly influence species immigration rates, that statement differs from the governing ecological pattern and must be evaluated against the mechanism rather than accepted from wording alone. 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—“Island size”, “Island distance from mainland”, “Mainland species pool”—refer to different states, pro

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

View Details

Island

Islands close to mainland show:

“High colonization and low extinction” for islands close to mainland show. 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—“High colonization and high extinction”, “Low colonization and low extinction”, “Low colonization and high extinction”—refer to different states, processes, or sc

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

View Details

Island

Island expected to have lowest species richness:

“Small far from mainland” for island expected to have lowest species richness. 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—“Large near mainland”, “Small near mainland”, “Large far from mainland”—refer to differ

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

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