Decoupling Fragmentation from Habitat Loss for Spiders in Patchy Agricultural Landscapes

Yoni Gavish, Yaron Ziv, Michael L Rosenzweig

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Habitat loss reduces species diversity, but the effect of habitat fragmentation on number of species is less clear because fragmentation generally accompanies loss of habitat. We compared four methods that aim to decouple the effects of fragmentation from the effects of habitat loss. Two methods are based on species-area relations, one on Fisher's alpha index of diversity, and one on plots of cumulative number of species detected against cumulative area sampled. We used these methods to analyze the species diversity of spiders in 2, 3.2 × 4 km agricultural landscapes in Southern Judea Lowlands, Israel. Spider diversity increased as fragmentation increased with all four methods, probably not because of the additive within-patch processes, such as edge effect and heterogeneity. The positive relation between fragmentation and species diversity might reflect that most species can disperse through the fields during the wheat-growing season. We suggest that if a given area was designated for the conservation of spiders in Southern Judea Lowlands, Israel, a set of several small patches may maximize species diversity over time.

Original languageEnglish (US)
Pages (from-to)150-159
Number of pages10
JournalConservation Biology
Volume26
Issue number1
DOIs
StatePublished - Feb 2012

Fingerprint

habitat loss
habitat destruction
spider
Araneae
species diversity
fragmentation
agricultural land
Israel
lowlands
edge effect
habitat fragmentation
methodology
edge effects
growing season
wheat
method
habitat
effect

Keywords

  • Arthropods
  • Landscape
  • SLOSS
  • Species diversity
  • Species-area relation

ASJC Scopus subject areas

  • Nature and Landscape Conservation
  • Ecology, Evolution, Behavior and Systematics
  • Ecology

Cite this

Decoupling Fragmentation from Habitat Loss for Spiders in Patchy Agricultural Landscapes. / Gavish, Yoni; Ziv, Yaron; Rosenzweig, Michael L.

In: Conservation Biology, Vol. 26, No. 1, 02.2012, p. 150-159.

Research output: Contribution to journalArticle

@article{73c3c758122a47c598dc04cf11fc73fe,
title = "Decoupling Fragmentation from Habitat Loss for Spiders in Patchy Agricultural Landscapes",
abstract = "Habitat loss reduces species diversity, but the effect of habitat fragmentation on number of species is less clear because fragmentation generally accompanies loss of habitat. We compared four methods that aim to decouple the effects of fragmentation from the effects of habitat loss. Two methods are based on species-area relations, one on Fisher's alpha index of diversity, and one on plots of cumulative number of species detected against cumulative area sampled. We used these methods to analyze the species diversity of spiders in 2, 3.2 × 4 km agricultural landscapes in Southern Judea Lowlands, Israel. Spider diversity increased as fragmentation increased with all four methods, probably not because of the additive within-patch processes, such as edge effect and heterogeneity. The positive relation between fragmentation and species diversity might reflect that most species can disperse through the fields during the wheat-growing season. We suggest that if a given area was designated for the conservation of spiders in Southern Judea Lowlands, Israel, a set of several small patches may maximize species diversity over time.",
keywords = "Arthropods, Landscape, SLOSS, Species diversity, Species-area relation",
author = "Yoni Gavish and Yaron Ziv and Rosenzweig, {Michael L}",
year = "2012",
month = "2",
doi = "10.1111/j.1523-1739.2011.01799.x",
language = "English (US)",
volume = "26",
pages = "150--159",
journal = "Conservation Biology",
issn = "0888-8892",
publisher = "Wiley-Blackwell",
number = "1",

}

TY - JOUR

T1 - Decoupling Fragmentation from Habitat Loss for Spiders in Patchy Agricultural Landscapes

AU - Gavish, Yoni

AU - Ziv, Yaron

AU - Rosenzweig, Michael L

PY - 2012/2

Y1 - 2012/2

N2 - Habitat loss reduces species diversity, but the effect of habitat fragmentation on number of species is less clear because fragmentation generally accompanies loss of habitat. We compared four methods that aim to decouple the effects of fragmentation from the effects of habitat loss. Two methods are based on species-area relations, one on Fisher's alpha index of diversity, and one on plots of cumulative number of species detected against cumulative area sampled. We used these methods to analyze the species diversity of spiders in 2, 3.2 × 4 km agricultural landscapes in Southern Judea Lowlands, Israel. Spider diversity increased as fragmentation increased with all four methods, probably not because of the additive within-patch processes, such as edge effect and heterogeneity. The positive relation between fragmentation and species diversity might reflect that most species can disperse through the fields during the wheat-growing season. We suggest that if a given area was designated for the conservation of spiders in Southern Judea Lowlands, Israel, a set of several small patches may maximize species diversity over time.

AB - Habitat loss reduces species diversity, but the effect of habitat fragmentation on number of species is less clear because fragmentation generally accompanies loss of habitat. We compared four methods that aim to decouple the effects of fragmentation from the effects of habitat loss. Two methods are based on species-area relations, one on Fisher's alpha index of diversity, and one on plots of cumulative number of species detected against cumulative area sampled. We used these methods to analyze the species diversity of spiders in 2, 3.2 × 4 km agricultural landscapes in Southern Judea Lowlands, Israel. Spider diversity increased as fragmentation increased with all four methods, probably not because of the additive within-patch processes, such as edge effect and heterogeneity. The positive relation between fragmentation and species diversity might reflect that most species can disperse through the fields during the wheat-growing season. We suggest that if a given area was designated for the conservation of spiders in Southern Judea Lowlands, Israel, a set of several small patches may maximize species diversity over time.

KW - Arthropods

KW - Landscape

KW - SLOSS

KW - Species diversity

KW - Species-area relation

UR - http://www.scopus.com/inward/record.url?scp=84856329434&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84856329434&partnerID=8YFLogxK

U2 - 10.1111/j.1523-1739.2011.01799.x

DO - 10.1111/j.1523-1739.2011.01799.x

M3 - Article

C2 - 22136430

AN - SCOPUS:84856329434

VL - 26

SP - 150

EP - 159

JO - Conservation Biology

JF - Conservation Biology

SN - 0888-8892

IS - 1

ER -