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Natural disasters like floods and earthquakes affect populations regardless of their density, making them density-independent factors.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Predation and Herbivory
Hurricanes and other natural disasters affect populations regardless of their density, making them density-independent factors.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Predation and Herbivory
Natural disasters like floods and earthquakes affect populations regardless of their density, making them density-independent factors.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Predation and Herbivory
Earthquakes are density-independent because they impact populations regardless of their size.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Predation and Herbivory
Drought originates from an abiotic shortage of precipitation and generally affects a population regardless of whether that population is sparse or crowded. Disease transmission, competition, and many predator responses usually strengthen with density because individuals encounter one another or shared resources more often. The distinction concerns how impact changes with density, not whether the factor is biotic or abiotic in every possible case. Population regulation concerns feedback, not mere limitation. A drought may sharply reduce numbers yet fail to push the population toward a repeatabl
Ref: Ecology: From Individuals to Ecosystems, Begon et al., 5th Ed., Ch. 5
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