In detail

Density-independent factors

Density-independent factors


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Population dynamics / Populationsцkologie

Factors affecting populations are divided into density-independent and density-dependent factors. Density-independent is a factor when it has nothing to do with the number of individuals in a population:
environmental disasters: Forest fires, comet impacts, landslides, floods, tornadoes and earthquakes are among the possible environmental catastrophes that can affect populations randomly and undirectedly.
Weather: Cold, warmth and seasons change; precipitation, lightning strikes, strong winds (bad weather)
chemicals: means unnatural chemical substances introduced by humans, including pesticides, remnants of medicines (such as antibiotics), contaminated effluents (such as heavy metals, fertilizers)
Radioaktivitдt: increased radiation near nuclear power plants; nuclear disaster
Interspecific competition: Competition between different species for resources (food) or districts (for example, when occupying the same / similar kцlogische niche)
Unspecific predators: Predators that are in no predator-prey relationship to the killed animal and whose prey was determined more by accident
non-infectious diseases: accidental, non-infectious diseases (eg malignancies, ie cancer)