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Delayed density dependence : ウィキペディア英語版 | Delayed density dependence In population ecology delayed density dependence describes a situation where population growth is controlled by negative feedback operating with a time lag.〔BONSALL, M.B., HASAN, N. and NAKAMURA, K., 2007. Density dependence and noise determine the long-term dynamics of two species of lady beetle (Coleoptera: Coccinellidae: Epilachninae) in the Indonesian tropics. Ecological Entomology, 32(1), pp. 28-37.〕 ==Population cycles==
Delayed density dependence has been used by ecologists to explain population cycles.〔TURCHIN, P., TAYLOR, A.D. and REEVE, J.D., 1999. Dynamical role of predators in population cycles of a forest insect: An experimental test. Science, 285(5430), pp. 1068-1071.〕 Ecologists have been unable to successfully explain regular population cycles for many decades delayed density dependence may hold the answer.〔 Here populations are allowed to increase above their normal capacity because there is a time lag until negative feedback mechanisms bring the population back down. This effect has been used to explain the widely fluctuating population cycles of lemmings,〔FRAMSTAD, E., STENSETH, N.C., BJORNSTAD, O.N. and FALCK, W., 1997. Limit cycles in Norwegian lemmings: Tensions between phase-dependence and density-dependence. Proceedings of the Royal Society B: Biological Sciences, 264(1378), pp. 31-38.〕 forest insects as well as the population cycles of larger mammals such as moose and wolves.〔POST, E., STENSETH, N.C., PETERSON, R.O., VUCETICH, J.A. and ELLIS, A.M., 2002. Phase dependence and population cycles in a large-mammal predator-prey system. Ecology, 83(11), pp. 2997-3002.〕 Other causes of population cycles include cycling abiotic factors.〔HUNTER, M.D. and PRICE, P.W., 2000. Detecting cycles and delayed density dependence: A reply to Turchin and Berryman. Ecological Entomology, 25(1), pp. 122-124.〕
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