LEWONTIN THE MEANING OF STABILITY PDF

LEWONTIN THE MEANING OF STABILITY PDF

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November 20, 2020

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.

Introduction Natural communities can exist at multiple stable points in time or space [1]. Our results have important implications for giant eucalypt forest management. Article citations Lewontin RC The meaning of stability. The lack meannig clear functional differentiation from rainforest suggests that giant eucalypt forests are unstable states within the basin of attraction of rainforest. Such states are nontransitory, persist over ecologically relevant timescales, and are therefore considered domains of stable equilibrium [2, 3].

Lewontin Published in Brookhaven symposia in meanning Save to Library.

LabaughNed H. Moving from Ecological Conservation to Restoration: EulissDonald O. With sea otters absent, dense sea urchin populations overgraze and exclude foliose macroalgae.

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.

The two types of giant eucalypt forests also exhibited greater overall functional similarity to each other than to any of the open teh types. Angeler Ecology and society: This paper has citations. Kelp Forests versus Urchin Barrens: The background and some current problems of theoretical ecology Robert P.

McKennaJames W.

Ecological theory differentiates rainforest and open vegetation in many regions as functionally divergent alternative stable states leowntin transitional ecotonal vegetation between the two forming transient unstable states.

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This paper has been referenced on Twitter 3 times over the past 90 days. For most traits, giant eucalypt forest was similar to rainforest, while rainforest, particularly tropical rainforest, was significantly different from the open vegetation. DudgeonRichard B. Citations Publications citing this paper. Although debated, prey quality changes have been implicated srability current meaningg population status. A quantitative framework for assessing ecological resilience. Semantic Scholar estimates that this publication has citations based on the available data.

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]. In general, predator removal causes prey community shifts enabling one or few algal or invertebrate competitive dominants to proliferate.

The meaning of stability. We therefore created predictions of patterns in plant functional traits that would test the alternative stable states model ov these systems.

Potential mechanismsresearch avenuesand management action associated with size at age and growth of Pacific halibut Timothy Loher Executive TngGreg J. Robustness and Contingent History: In the early s a rapid otter population decline released urchins from predation and caused a shift to the urchin-dominated state.

Reorganization of interaction networks modulates the stablity of species in late successional stages. MushetOwen P.

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 multivariate analyses, tropical and temperate rainforest diverged functionally, and both segregated from open vegetation.

Showing of 65 extracted citations.

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Interplay between stochastic and deterministic processes in the maintenance of alternative community states in Verrucomicrobia-dominated shallow lakes. BlancoChih-Wei YuB. Despite increases in urchin abundance, otter numbers continued to decline. 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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In lrwontin early s, a rapid sea otter population decline ca. We analysed a set of functional traits: Furthermore, the giant eucalypt forests overlapped in function with their respective rainforests. With sea otters present, sea urchins are reduced to sparse populations enabling kelps to flourish.

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The meaning of stability. – Abstract – Europe PMC

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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. Rohr The Journal of animal ecology 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.

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. Citation Statistics Citations 0 10 20 ’74 ’84 ’95 ’06 ‘ Macroalgal and urchin barren communities are alternately stable and persist in the Aleutians due to sea otter presence and absence.

Phase shifts and stable states on coral reefs Steve R. We conclude that tropical and temperate giant eucalypt forests are ecologically and functionally convergent.