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Sotomayor & Lortie ESA talk 2014
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Indirect effects in a desert plant community: do nurse-plants mediate interactions between understorey species? Diego A. Sotomayor 1 and Christopher J. Lortie 1,2 1 Department of Geography, York University, Toronto 2 Department of Biology, York University, Toronto
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A presentation during the 2014 ESA Annual Meeting in Sacramento. Look inside if you interested in plant interactions and deserts.
Transcript of Sotomayor & Lortie ESA talk 2014
Indirect effects in a desert plant community: do nurse-plants mediate interactions between understorey species?
Diego A. Sotomayor1 and Christopher J. Lortie1,2
1 Department of Geography, York University, Toronto2 Department of Biology, York University, Toronto
integrated community concept
Lortie et al 2004, Callaway 1995, 1997, Pugnaire & Luque 2000
Bruno et al. 2003
Year
1985 1990 1995 2000 2005 2010
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250FacilitationIndirect interactions
Recognition of facilitation within ecological theory, however indirect interactions have lagged behind
Strauss 1991, Callaway 2007, Sotomayor & Lortie (in review)
Dominant plants in stressful environments should mediate the outcome of interactions in their understory
Callaway 2007
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Field site
Atiquipa, Peru (15oS)Private reserve
Coastal desert location ~ 200 mm rainfall/year
Winter growing season
Fog
Elevation gradient
Experimental design
Plantago limensis
Fuertisimalva peruviana
Caesalpinia spinosa
Neighbors present
Neighbors removed
Results Plantago limensis
A C D E
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O - neighborsO + neighborsU - neighborsU + neighbors
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ass
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Fuertisimalva peruviana
O - neighborsO + neighborsU - neighborsU + neighbors
A B C E
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lant
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ELEVATION
O - neighborsO + neighborsU - neighborsU + neighbors
A B C E
Num
ber o
f fru
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lant
0
50
100
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200
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300
A C D E0
50
100
150
200
250
300
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Num
ber
of f
ruits
/pla
nt
A B C E
A C D E
O - neighborsO + neighborsU - neighborsU + neighbors
A B C E
Plan
t hei
ght (
cm)
0
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30
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60
A C D E0
10
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Plan
t he
ight
(cm
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A B C E
A C D E
O - neighborsO + neighborsU - neighborsU + neighbors
A B C D E
Bio
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12 2012
A B C D E
Biom
ass
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ImplicationsContrasting effects of shrubs for other deserts on the
competition intensity of understory plants
Tielborger & Kadmon 2000, Schöb et al. 2013, Soliveres et al. 2011
Dominant plants mediate species-specific effects in their understory, within the over-arching
positive effect of their canopy
Acknowledgments and collaborators
Universidad Nacional de San Agustín, PeruFrancisco Villasante, Italo Revilla, Briggeth Flores, Jessica Turpo, Paola Medina
York University, CanadaDepartment of Geography and Faculty of Graduate Studies
THANK [email protected]
