Question

Belovsky, G. E., C. Mellison, C. Larson, and P. A. Van Zandt. 1999. Experimental studies of extinction dynamics. Science 286:1175-1177.

Answer 1

Population extinction is a natural occurrence, but because the pace of extinction on a global scale is increasing, understanding extinction is crucial for conservation. To evaluate proposed extinction processes, the rate of extinction in experimental populations of brine shrimp (Artemia franciscana) was evaluated. As was predicted, the chance of extinction was decreased by a larger initial population, a larger maximum population size supported by the environment, and less change in environmental variables. However, contrary to popular belief, maximum population size and environmental variation were more significant than initial population size. Unexpectedly, the importance of deterministic population oscillations brought on by inborn nonlinear dynamics and overcrowding was equal to or greater than that of the assumed processes.

What is extinction?

Extinction happens when species become endangered due to environmental factors such habitat loss, climate change, natural disasters, human overuse, and pollution, or because of evolutionary changes in its constituent parts.

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