Rethinking patch size and isolation effects: the habitat amount hypothesis

Journal of Biogeography - Tập 40 Số 9 - Trang 1649-1663 - 2013
Lenore Fahrig1
1Geomatics and Landscape Ecology Research Laboratory (GLEL) Department of Biology Carleton University Ottawa ON K1S 5B6 Canada

Tóm tắt

AbstractI challenge (1) the assumption that habitat patches are natural units of measurement for species richness, and (2) the assumption of distinct effects of habitat patch size and isolation on species richness. I propose a simpler view of the relationship between habitat distribution and species richness, the ‘habitat amount hypothesis’, and I suggest ways of testing it. The habitat amount hypothesis posits that, for habitat patches in a matrix of non‐habitat, the patch size effect and the patch isolation effect are driven mainly by a single underlying process, the sample area effect. The hypothesis predicts that species richness in equal‐sized sample sites should increase with the total amount of habitat in the ‘local landscape’ of the sample site, where the local landscape is the area within an appropriate distance of the sample site. It also predicts that species richness in a sample site is independent of the area of the particular patch in which the sample site is located (its ‘local patch’), except insofar as the area of that patch contributes to the amount of habitat in the local landscape of the sample site. The habitat amount hypothesis replaces two predictor variables, patch size and isolation, with a single predictor variable, habitat amount, when species richness is analysed for equal‐sized sample sites rather than for unequal‐sized habitat patches. Studies to test the hypothesis should ensure that ‘habitat’ is correctly defined, and the spatial extent of the local landscape is appropriate, for the species group under consideration. If supported, the habitat amount hypothesis would mean that to predict the relationship between habitat distribution and species richness: (1) distinguishing between patch‐scale and landscape‐scale habitat effects is unnecessary; (2) distinguishing between patch size effects and patch isolation effects is unnecessary; (3) considering habitat configuration independent of habitat amount is unnecessary; and (4) delineating discrete habitat patches is unnecessary.

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Tài liệu tham khảo

10.2307/3545823

10.1111/j.1600-0587.2010.06288.x

10.1046/j.1365-2664.2000.00478.x

10.1111/j.1365-2664.2010.01858.x

10.1007/BF00056393

10.1046/j.1523-1739.2002.01003.x

10.1023/A:1022937226820

10.1016/S0006-3207(02)00329-4

10.1111/j.1523-1739.2007.00723.x

10.1023/B:LAND.0000018357.45262.b9

10.1046/j.1442-9993.2001.01114.x

10.2193/2008-533

10.1890/0012-9658(2000)081[2211:EOGFOI]2.0.CO;2

10.1111/j.1600-0706.2011.20273.x

10.1007/BF02275266

10.1007/s10980-004-5650-5

10.1016/j.biocon.2007.08.025

10.1146/annurev.ecolsys.34.011802.132419

10.1016/j.actao.2009.11.005

10.1111/j.1365-2311.2010.01218.x

10.1111/j.1365-2699.2005.01319.x

10.1016/j.biocon.2004.11.018

10.1111/j.1600-0706.2009.17342.x

10.1016/j.agee.2012.05.006

10.1007/s10841-007-9123-4

10.1016/j.biocon.2003.06.006

10.1016/0006-3207(86)90002-9

10.1007/s10980-006-9012-3

10.1007/s11258-008-9475-1

10.1007/s10531-011-0128-7

10.1007/s10980-010-9476-z

10.1111/j.1523-1739.2011.01799.x

10.2307/3676456

10.1890/1051-0761(2002)012[0321:ACGOFR]2.0.CO;2

10.1111/j.1095-8312.1991.tb00552.x

10.1007/s11284-009-0675-5

10.2307/3037984

10.1111/j.1466-8238.2009.00473.x

10.1098/rspb.1996.0047

10.1111/j.1654-109X.2009.01031.x

10.1007/s10531-009-9621-7

10.1016/S0167-8809(99)00123-1

10.1111/j.0030-1299.2005.13638.x

10.1016/0040-5809(92)90034-Q

10.2307/3546872

10.1046/j.1523-1739.2003.01310.x

10.1111/j.0307-6946.2005.00738.x

10.1111/j.1600-0587.1998.tb00437.x

10.1007/s10980-012-9757-9

10.1603/022.038.0509

10.1111/j.1466-822X.2006.00205.x

10.1086/284734

10.1046/j.1523-1739.2002.01025.x

10.1890/1051-0761(1999)009[0594:TROAMT]2.0.CO;2

10.5194/we-7-47-2007

10.1111/j.1558-5646.1963.tb03295.x

MacArthur R.H., 1967, The theory of island biogeography

10.1890/11-2224.1

10.1002/aqc.2227

10.2307/1939548

10.2307/2845591

10.2307/2403531

10.1890/0012-9658(2002)083[1131:SCMISE]2.0.CO;2

10.2307/3566065

10.1111/j.1600-0587.2011.06870.x

10.1016/S0006-3207(01)00154-9

10.1007/s11258-005-3025-x

10.1111/j.1365-2656.2006.01096.x

10.1078/1439-1791-00181

10.1111/j.1526-100X.2006.00148.x

10.1111/j.1365-2699.2004.01056.x

10.2307/1933371

10.1007/s10531-009-9750-z

10.1890/08-1524.1

10.1371/journal.pone.0027963

10.1111/j.1600-0587.2009.06363.x

10.1046/j.1523-1739.2001.015002378.x

10.1086/593002

10.1111/j.1523-1739.2011.01816.x

10.1016/j.jenvman.2011.06.024

10.1890/08-0101.1

Rosenzweig M.L., 2004, Frontiers in biogeography: new directions in the geography of nature, 325

10.14411/eje.2011.013

10.1111/j.1600-0587.1994.tb00074.x

10.1046/j.1466-822X.2003.00061.x

10.1007/s10980-010-9566-y

10.1890/0012-9658(1997)078[1914:ABBRTF]2.0.CO;2

10.1007/s00442-010-1746-6

10.1111/j.1365-2656.2011.01947.x

10.1016/j.biocon.2005.04.011

10.1111/j.1600-0587.2010.06201.x

10.2980/19-1-3455

10.1093/ee/37.4.897

10.1111/j.1365-2699.2010.02333.x

10.1007/s10980-010-9549-z

10.1023/A:1022908109982

10.1016/j.jtbi.2010.02.009

10.1111/j.1365-2699.2011.02652.x

10.1890/1051-0761(2002)012[0354:COSHFT]2.0.CO;2

10.1007/s10531-011-0154-5

10.1046/j.1365-2664.1998.355344.x

10.1111/j.1523-1739.2006.00482.x

10.1111/j.1600-0587.2012.07669.x

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Journal of Biogeography

Tập 40 Số 9

1649-1663

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