A test of the cross-scale resilience model

Functional richness in Mediterranean-climate ecosystems

Donald A. Wardwell, Craig R. Allen, Garry D. Peterson, Richard AJ Tyre

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Ecological resilience has been proposed to be generated, in part, in the discontinuous structure of complex systems. Environmental discontinuities are reflected in discontinuous, aggregated animal body mass distributions. Diversity of functional groups within body mass aggregations (scales) and redundancy of functional groups across body mass aggregations (scales) has been proposed to increase resilience. We evaluate that proposition by analyzing mammalian and avian communities of Mediterranean-climate ecosystems. We first determined that body mass distributions for each animal community were discontinuous. We then calculated the variance in richness of function across aggregations in each community, and compared observed values with distributions created by 1000 simulations using a null of random distribution of function, with the same n, number of discontinuities and number of functional groups as the observed data. Variance in the richness of functional groups across scales was significantly lower in real communities than in simulations in eight of nine sites. The distribution of function across body mass aggregations in the animal communities we analyzed was non-random, and supports the contentions of the cross-scale resilience model.

Original languageEnglish (US)
Pages (from-to)165-182
Number of pages18
JournalEcological Complexity
Volume5
Issue number2
DOIs
StatePublished - Jun 1 2008

Fingerprint

testcrosses
Mediterranean climate
body mass
functional group
ecosystems
ecosystem
animal community
discontinuity
functional diversity
simulation
distribution
test
animal
animals

Keywords

  • Body mass
  • Discontinuity
  • Diversity
  • Gap rarity index
  • Scale

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecological Modeling

Cite this

A test of the cross-scale resilience model : Functional richness in Mediterranean-climate ecosystems. / Wardwell, Donald A.; Allen, Craig R.; Peterson, Garry D.; Tyre, Richard AJ.

In: Ecological Complexity, Vol. 5, No. 2, 01.06.2008, p. 165-182.

Research output: Contribution to journalArticle

Wardwell, Donald A. ; Allen, Craig R. ; Peterson, Garry D. ; Tyre, Richard AJ. / A test of the cross-scale resilience model : Functional richness in Mediterranean-climate ecosystems. In: Ecological Complexity. 2008 ; Vol. 5, No. 2. pp. 165-182.
@article{4a3a5d1799bd4effb569dda12bf1e6cc,
title = "A test of the cross-scale resilience model: Functional richness in Mediterranean-climate ecosystems",
abstract = "Ecological resilience has been proposed to be generated, in part, in the discontinuous structure of complex systems. Environmental discontinuities are reflected in discontinuous, aggregated animal body mass distributions. Diversity of functional groups within body mass aggregations (scales) and redundancy of functional groups across body mass aggregations (scales) has been proposed to increase resilience. We evaluate that proposition by analyzing mammalian and avian communities of Mediterranean-climate ecosystems. We first determined that body mass distributions for each animal community were discontinuous. We then calculated the variance in richness of function across aggregations in each community, and compared observed values with distributions created by 1000 simulations using a null of random distribution of function, with the same n, number of discontinuities and number of functional groups as the observed data. Variance in the richness of functional groups across scales was significantly lower in real communities than in simulations in eight of nine sites. The distribution of function across body mass aggregations in the animal communities we analyzed was non-random, and supports the contentions of the cross-scale resilience model.",
keywords = "Body mass, Discontinuity, Diversity, Gap rarity index, Scale",
author = "Wardwell, {Donald A.} and Allen, {Craig R.} and Peterson, {Garry D.} and Tyre, {Richard AJ}",
year = "2008",
month = "6",
day = "1",
doi = "10.1016/j.ecocom.2007.11.001",
language = "English (US)",
volume = "5",
pages = "165--182",
journal = "Ecological Complexity",
issn = "1476-945X",
publisher = "Elsevier",
number = "2",

}

TY - JOUR

T1 - A test of the cross-scale resilience model

T2 - Functional richness in Mediterranean-climate ecosystems

AU - Wardwell, Donald A.

AU - Allen, Craig R.

AU - Peterson, Garry D.

AU - Tyre, Richard AJ

PY - 2008/6/1

Y1 - 2008/6/1

N2 - Ecological resilience has been proposed to be generated, in part, in the discontinuous structure of complex systems. Environmental discontinuities are reflected in discontinuous, aggregated animal body mass distributions. Diversity of functional groups within body mass aggregations (scales) and redundancy of functional groups across body mass aggregations (scales) has been proposed to increase resilience. We evaluate that proposition by analyzing mammalian and avian communities of Mediterranean-climate ecosystems. We first determined that body mass distributions for each animal community were discontinuous. We then calculated the variance in richness of function across aggregations in each community, and compared observed values with distributions created by 1000 simulations using a null of random distribution of function, with the same n, number of discontinuities and number of functional groups as the observed data. Variance in the richness of functional groups across scales was significantly lower in real communities than in simulations in eight of nine sites. The distribution of function across body mass aggregations in the animal communities we analyzed was non-random, and supports the contentions of the cross-scale resilience model.

AB - Ecological resilience has been proposed to be generated, in part, in the discontinuous structure of complex systems. Environmental discontinuities are reflected in discontinuous, aggregated animal body mass distributions. Diversity of functional groups within body mass aggregations (scales) and redundancy of functional groups across body mass aggregations (scales) has been proposed to increase resilience. We evaluate that proposition by analyzing mammalian and avian communities of Mediterranean-climate ecosystems. We first determined that body mass distributions for each animal community were discontinuous. We then calculated the variance in richness of function across aggregations in each community, and compared observed values with distributions created by 1000 simulations using a null of random distribution of function, with the same n, number of discontinuities and number of functional groups as the observed data. Variance in the richness of functional groups across scales was significantly lower in real communities than in simulations in eight of nine sites. The distribution of function across body mass aggregations in the animal communities we analyzed was non-random, and supports the contentions of the cross-scale resilience model.

KW - Body mass

KW - Discontinuity

KW - Diversity

KW - Gap rarity index

KW - Scale

UR - http://www.scopus.com/inward/record.url?scp=44349085498&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=44349085498&partnerID=8YFLogxK

U2 - 10.1016/j.ecocom.2007.11.001

DO - 10.1016/j.ecocom.2007.11.001

M3 - Article

VL - 5

SP - 165

EP - 182

JO - Ecological Complexity

JF - Ecological Complexity

SN - 1476-945X

IS - 2

ER -