Species-area relationship was given by
Species-area relationship given by Alexander von Humboldt, S=CA^Z.
Ref: NCERT Biology Class XII — Human Health and Disease, Immunology
#biogeography
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Which concept explains the evolution of Australian marsupials into various forms from a common ancestor?
Adaptive radiation explains how Australian marsupials evolved into different forms, adapting to various ecological niches.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Adaptive Radiation and Biological Evolution
Island biogeography can also apply to mainland habitats viewed as islands within:
“A 'sea' of unsuitable habitats” for island biogeography can also apply to mainland habitats viewed as islands within. 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—“Marine ecosystems”, “Deserts”, “Forest ecosyst
Ref: Biogeography, Lomolino et al., 5th Ed., Ch. 5-8
Wilson’s work on island biogeography helped explain:
“Uneven distribution of species” for wilson’s work on island biogeography helped explain. 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—“Genetic mutations”, “Even distribution of species”, “Population growth rates”—refer to different states, processes, or scales and therefore do not
Ref: Biogeography, Lomolino et al., 5th Ed., Ch. 5-8
Immigration rates are primarily influenced by island:
“Distance from mainland” for immigration rates are primarily influenced by island. 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—“Vegetation type”, “Altitude”, “Climate”—refer to different states, processes, or s
Ref: Biogeography, Lomolino et al., 5th Ed., Ch. 5-8
Equilibrium theory is another name for:
“Island biogeography theory” for equilibrium theory is another name for. 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 drift theory”, “Evolutionary theory”, “Dispersal theory”—refer to different
Ref: Biogeography, Lomolino et al., 5th Ed., Ch. 5-8
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
In the context of island biogeography, colonization refers specifically to:
“New species entering an island” for in the context of island biogeography, colonization refers specifically to. 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—“Population decline”, “Species extinction”, “Genetic
Ref: Biogeography, Lomolino et al., 5th Ed., Ch. 5-8
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
Why is the initial extinction rate low in newly colonized islands?
“Low competition and abundant resources” for why is the initial extinction rate low in newly colonized islands. 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—“High competition”, “Limited resources”, “High
Ref: Biogeography, Lomolino et al., 5th Ed., Ch. 1-4
Island biogeography is also referred to as:
“Equilibrium theory” for island biogeography is also referred to as. 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—“Dispersal theory”, “Genetic drift theory”, “Habitat theory”—refer to different states, processes
Ref: Biogeography, Lomolino et al., 5th Ed., Ch. 1-4
Small islands generally have:
“Higher extinction rates” for small islands generally 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”, “Stable ecosystems”—refer to different state
Ref: Biogeography, Lomolino et al., 5th Ed., Ch. 1-4
