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.

EulissDonald O. With sea otters present, sea urchins are reduced to sparse populations enabling kelps to flourish. Reorganization of interaction networks modulates the persistence of species in late successional stages. With sea otters absent, dense sea urchin populations overgraze and exclude foliose macroalgae. Angeler Ecology and society: Robustness and Contingent History: Citation Statistics Citations 0 10 20 ’74 ’84 ’95 ’06 ‘ McKennaJames W. 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.

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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. DudgeonRichard B. By clicking accept or continuing to use the site, you agree to the terms outlined in our Privacy PolicyTerms of Serviceand Dataset License. Kelp Forests versus Urchin Barrens: 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.

Furthermore, the giant eucalypt forests overlapped in function with their respective rainforests.

See our FAQ for additional information. We analysed a set of functional traits: Rohr The Journal of animal ecology 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.


Interplay between stochastic and deterministic processes in the jeaning of alternative community states in Verrucomicrobia-dominated shallow lakes. This paper has been referenced on Twitter 3 times over the past 90 days. In general, predator removal causes prey community shifts enabling one or few algal or invertebrate competitive dominants to proliferate.

The meaning of stability.

Showing of 65 extracted citations. We measured functional traits of trees and shrubs across tropical and temperate rainforest — open vegetation transitions in Australia, with meanin eucalypt forests situated between these vegetation types.

In the early s, a rapid sea otter population decline ca. TngGreg J. 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 mewning marine ecosystems. We therefore created predictions of patterns in plant functional traits that would test the alternative stable states model of these systems.

Our results have important implications for giant eucalypt forest management.

Introduction Natural communities can exist at multiple stable points in time or space [1]. 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.

Potential mechanismsresearch avenuesand management action associated with size at age and growth of Pacific halibut Timothy Loher Lewlntin Skip to search form Skip to main content. In ecological studies in the Aleutian Islands, the presence and absence of dense sea otter populations can instigate state lewontij 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.


The two types of giant eucalypt forests also exhibited greater overall functional similarity to each other than to any of the open vegetation types. This paper has citations. BlancoChih-Wei YuB. The background and some current problems of theoretical ecology Robert P. In multivariate analyses, tropical and temperate rainforest diverged functionally, and both segregated from open vegetation.

JordanDavid M.

A quantitative framework for assessing ecological resilience. The meaning of stability. Article citations Lewontin RC The meaning of stability.

Semantic Scholar estimates that this publication has citations based on the available data. 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. The lack of clear functional differentiation from rainforest suggests that giant eucalypt forests are unstable states within the basin of attraction of rainforest. Lewontin Published in Brookhaven symposia in biology Save to Library.

Such states are nontransitory, persist over ecologically relevant timescales, and are therefore considered domains of stable equilibrium [2, 3]. Although debated, prey quality changes have been implicated in current otter population status.

Moving from Ecological Conservation to Restoration: Macroalgal and urchin barren communities are alternately stable and persist in the Aleutians due to sea otter presence and absence. Ot shifts and stable states on coral reefs Steve R. Despite increases in urchin abundance, otter numbers continued to decline.