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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Rohr The Journal of animal ecology Although debated, prey quality changes have been implicated in current otter population status. Article citations Lewontin RC The meaning of stability.

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. Introduction Natural communities can exist at multiple stable points in time or space [1]. Citation Statistics Meanjng 0 10 20 ’74 meannig ’95 ’06 ‘ 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].

Skip to search form Skip to main content. With sea otters absent, dense sea urchin populations overgraze and exclude foliose macroalgae.

The meaning of stability.

We therefore created predictions of patterns in plant functional traits that would test the alternative stable states model of these systems. 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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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. Significant changes in the meainng of key species are widely cited as evidence xtability phase shifts [5, 6] but see [7] and have been documented both leqontin [8] and empirically [9, 10] in coastal marine ecosystems.

In the early s, a rapid sea otter population decline ca. Furthermore, the giant eucalypt forests overlapped in function with their respective rainforests. Stable points are characterized by a specific structural and functional species assemblage recognizably different from other assemblages that can occur under the same set meaniny environmental conditions.

Showing of 65 extracted citations. McKennaJames W. This study examined otter prey abundance, size, biomass, and potential energy density in remnant kelp forest sability urchin-dominated communities to determine if alternate stable states affect prey quality. The meaning of stability. EulissDonald O. This paper has been referenced on Twitter 3 times over the past 90 days.

We analysed a set of functional traits: In multivariate analyses, tropical and temperate rainforest diverged functionally, and both segregated from open vegetation. Phase shifts and stable states on coral reefs Steve R. Kelp Forests versus Urchin Barrens: MushetOwen P.

BlancoChih-Wei YuB. 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 lewonntin in the Aleutians. LabaughNed H.

In general, predator removal causes prey community shifts enabling one or few algal or o competitive dominants to proliferate. Our results have important implications for giant eucalypt forest management.

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The meaning of stability. – Abstract – Europe PMC

This paper kf citations. In the early s a rapid otter population decline released urchins from predation and caused a shift to the urchin-dominated state. A quantitative framework for assessing ecological resilience. Lewontin Published in Brookhaven symposia in biology Save to Library. By clicking accept or continuing to use hhe site, you agree to the terms outlined in our Privacy PolicyTerms of Serviceand Dataset License. The lack of clear functional differentiation from rainforest suggests that giant eucalypt forests are unstable states within the basin of attraction of rainforest.

TngGreg J.

JordanDavid M. 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. Despite increases in urchin abundance, otter numbers staability to decline. Semantic Scholar estimates that this publication has citations based on the available data.

The meaning of stability. – Semantic Scholar

Reorganization of interaction networks modulates the persistence of species in late successional stages. The background and some current problems of theoretical ecology Robert P.

Citations Publications citing this paper.