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. Although multiple stable states can exist simultaneously, communities typically alternate from one stable state to another, a shift often conveyed by meanibg large perturbation applied directly to the state variables e. Article citations Lewontin RC The meaning of stability.
Reorganization of interaction networks modulates the persistence of species in late successional stages. This paper has citations. A quantitative framework for assessing ecological resilience.
Angeler Ecology and society: McKennaJames W. 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].
With sea otters absent, dense sea urchin populations overgraze and exclude foliose macroalgae. 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. With sea otters present, sea urchins are reduced to sparse populations enabling kelps to flourish.
Our results have important implications for giant eucalypt forest management. MushetOwen P. Showing of 65 extracted citations.
Robustness and Contingent History: TngGreg J. Such states are nontransitory, persist meainng ecologically relevant timescales, and are therefore considered domains of stable equilibrium [2, 3].
We conclude that tropical and temperate giant eucalypt forests are ecologically and functionally convergent.
DudgeonRichard B. In the early s a rapid otter population decline released urchins from predation and caused a shift to the urchin-dominated state. We analysed a set of functional traits: In multivariate analyses, tropical and temperate rainforest diverged functionally, and both segregated from open vegetation.
The meaning of stability.
The lack of clear functional differentiation from rainforest suggests that giant eucalypt forests are unstable states within the basin of attraction of rainforest. Phase shifts and stable states on coral reefs Steve R.
Lewontin Published in Brookhaven symposia stabbility biology Save to Library. BlancoChih-Wei YuB. Findings suggest that although urchin barrens provide meaniing abundant urchin prey, individual urchins are smaller and provide lower biomass and potential energy density compared to kelp forests. Citations Publications citing this paper. 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.
We measured functional traits of trees and shrubs across tropical and temperate rainforest — open vegetation transitions in Stabiity, with giant eucalypt forests situated between these vegetation types. LabaughNed H.
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Skip to search form Skip to main content. See our FAQ for additional information. The background and some current problems of theoretical ecology Robert P. We therefore created predictions of patterns in plant functional traits that would lewontni the alternative stable states model of these systems.
The meaning of stability.
Introduction Natural communities can exist at multiple stable points in time or space . This paper has been referenced on Twitter 3 times over the past 90 days.
Rohr The Journal of animal ecology Meaniny from Ecological Conservation to Restoration: Macroalgal and urchin barren communities are alternately stable meqning persist in the Aleutians due to sea otter presence and absence.
Significant changes in the abundance of key species are widely cited as evidence of phase shifts [5, 6] but see  and have been documented both experimentally  and empirically [9, 10] in coastal marine ecosystems. Although debated, prey quality changes have been implicated in current otter population status. In the early s, a sgability sea otter population decline ca.
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.
In general, predator removal causes prey community shifts enabling one or few algal or invertebrate competitive dominants to proliferate.