LEWONTIN THE MEANING OF STABILITY PDF

Local stability. • Alternate stable states. Page Alternate stable states. Time. Parameter. Min. Max. Page Richard Lewontin. “The meaning of stability” . R. C. Lewontin, “The meaning of stability,” Brookhaven Symposia in Biology, vol. 22, pp. 13–24, Lewontin RC () The meaning of stability. In: Diversity and Stability in Ecological Systems Brookhaven Symp Biol pp. 13– PubMed.

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The meaning of stability. Article citations Lewontin RC The meaning of stability. Findings suggest that although urchin barrens provide more abundant urchin prey, individual urchins are smaller and provide lower biomass and potential energy density compared to kelp forests.

Reorganization of interaction networks modulates the persistence of species in late successional stages. In stabi,ity early s a rapid otter population decline released urchins from predation and caused a shift to the urchin-dominated state.

In general, predator removal causes prey community shifts enabling one or few algal or invertebrate competitive dominants to proliferate. Showing of 65 extracted citations. Potential mechanismsresearch avenuesand management action associated with size at age and growth of Pacific halibut Timothy Loher Executive DudgeonRichard B.

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The meaning of stability.

stabklity Although multiple stable states can exist simultaneously, communities typically alternate from one stable state to another, a shift often conveyed by a large perturbation applied directly to the state variables e.

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We analysed a set of functional traits: The two types of giant eucalypt forests also exhibited greater overall functional similarity to each other than to any of the open vegetation types.

See our FAQ for additional information. Introduction Natural communities can exist at multiple stable meabing in time or space [1]. In ecological studies in the Aleutian Islands, the presence and absence of dense sea otter populations can instigate state shifts between two alternately stable nearshore communities, one dominated by kelp and the other by sea urchins [11—13].

For most traits, giant eucalypt forest was similar to rainforest, while rainforest, particularly tropical rainforest, was significantly different from the open vegetation.

Our results have important implications for giant eucalypt forest management. Semantic Scholar estimates that this publication has citations based on the available data. Kelp Forests versus Urchin Barrens: Robustness and Contingent History: Interplay between stochastic and deterministic processes in the maintenance of alternative community states in Verrucomicrobia-dominated shallow lakes.

Ecological theory differentiates rainforest and open vegetation in many regions as functionally divergent alternative stable states with transitional ecotonal vegetation between the two forming transient unstable states. Significant changes in the abundance of key species are widely cited as evidence of phase shifts [5, 6] but see [7] and have been documented both experimentally [8] and empirically [9, 10] in coastal marine ecosystems.

We measured functional traits of trees and shrubs across tropical and temperate rainforest — open vegetation transitions in Australia, with giant eucalypt forests situated between these vegetation types.

TngGreg J. EulissDonald O. Citation Statistics Citations 0 10 20 ’74 ’84 ’95 ’06 ‘ Angeler Ecology and society: The background and some current problems of theoretical ecology Robert P. Furthermore, the giant eucalypt forests overlapped in function with their respective rainforests.

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Such states are nontransitory, persist over ecologically relevant timescales, and are therefore considered domains of stable equilibrium [2, 3]. Rohr The Journal of animal ecology McKennaJames W. Fo multivariate analyses, tropical and temperate rainforest diverged functionally, and both segregated from open vegetation.

MushetOwen P.

The meaning of stability.

Stable points are characterized by a specific structural and functional species assemblage recognizably different from other assemblages that can occur under the same set of environmental conditions. Despite increases in urchin abundance, otter numbers continued to decline. A quantitative framework for assessing ecological resilience. This study examined otter prey abundance, size, biomass, and potential energy density in remnant kelp forest and urchin-dominated communities to determine if alternate stable states affect prey quality.

Citations Publications lewlntin this paper. Shifts to urchin barrens do affect prey quality but changes are likely compensated by increased prey densities and are insufficient in explaining current otter population status in the Aleutians.

Phase shifts and stable states on coral reefs Steve R. With sea otters present, sea urchins are reduced to sparse populations enabling kelps to flourish.

Moving from Ecological Conservation to Restoration: BlancoChih-Wei YuB. Skip to search form Skip to main elwontin.

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