Abstract:
Resource partitioning, facilitation, and sampling effect are the three mechanisms behind the biodiversity effect, which is depicted usually as the effect of plant-species richness on aboveground net primary production. These mechanisms operate simultaneously but their relative importance and interactions are difficult to unravel experimentally. Thus, niche differentiation and facilitation have been lumped together and separated from the sampling effect. Here, we propose three hypotheses about interactions among the three mechanisms and test them using a simulation model. The model simulated water movement through soil and vegetation, and net primary production mimicking the Patagonian steppe. Using the model, we created grass and shrub monocultures and mixtures, controlled root overlap and grass water-use efficiency (WUE) to simulate gradients of biodiversity, resource partitioning and facilitation. The presence of shrubs facilitated grass growth by increasing its WUE and in turn increased the sampling effect, whereas root overlap (resource partitioning) had, on average, no effect on sampling effect. Interestingly, resource partitioning and facilitation interacted so the effect of facilitation on sampling effect decreased as resource partitioning increased. Sampling effect was enhanced by the difference between the two functional groups in their efficiency in using resources. Morphological and physiological differences make one group outperform the other; once these differences were established further differences did not enhance the sampling effect. In addition, grass WUE and root overlap positively influence the biodiversity effect but showed no interactions. © 2013 Springer-Verlag Berlin Heidelberg.
Registro:
Documento: |
Artículo
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Título: | Interactions among resource partitioning, sampling effect, and facilitation on the biodiversity effect: A modeling approach |
Autor: | Flombaum, P.; Sala, O.E.; Rastetter, E.B. |
Filiación: | Dept. de Ciencias de la Atm. y los Oceanos, Cntr. de Invest. del Mar y la Atm., Inst. Franco-Argentino sobre Estudios de Clima y sus Impactos, Consejo Nacional de Invest. Cientificas y Tech., Univ. de Buenos Aires, Unidad Mixta Inter. (CONICET, Buenos Aires, Argentina School of Life Sciences and School of Sustainability, Arizona State University, Phoenix, AZ, United States The Ecosystem Center, Marine Biological Laboratory, Woods Hole, MA, United States Departamento de Ciencias de la Atmósfera y los Océanos (DCAO), Universidad de Buenos Aires, Pabellón II Piso 2, Ciudad Universitaria, C1428EGA Buenos Aires, Argentina
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Palabras clave: | Biodiversity and ecosystem functioning; Facilitation; Patagonian steppe; Resource partitioning; Sampling effect; biodiversity; functional group; growth response; morphology; net primary production; niche partitioning; physiology; sampling; simulation; water use efficiency; Patagonia; Argentina; article; biodiversity; biological model; biomass; growth, development and aging; plant root; Poaceae; soil; water flow; Argentina; Biodiversity; Biomass; Models, Biological; Plant Roots; Poaceae; Soil; Water Movements |
Año: | 2014
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Volumen: | 174
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Número: | 2
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Página de inicio: | 559
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Página de fin: | 566
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DOI: |
http://dx.doi.org/10.1007/s00442-013-2775-8 |
Título revista: | Oecologia
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Título revista abreviado: | Oecologia
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ISSN: | 00298549
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CODEN: | OECOB
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00298549_v174_n2_p559_Flombaum |
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Citas:
---------- APA ----------
Flombaum, P., Sala, O.E. & Rastetter, E.B.
(2014)
. Interactions among resource partitioning, sampling effect, and facilitation on the biodiversity effect: A modeling approach. Oecologia, 174(2), 559-566.
http://dx.doi.org/10.1007/s00442-013-2775-8---------- CHICAGO ----------
Flombaum, P., Sala, O.E., Rastetter, E.B.
"Interactions among resource partitioning, sampling effect, and facilitation on the biodiversity effect: A modeling approach"
. Oecologia 174, no. 2
(2014) : 559-566.
http://dx.doi.org/10.1007/s00442-013-2775-8---------- MLA ----------
Flombaum, P., Sala, O.E., Rastetter, E.B.
"Interactions among resource partitioning, sampling effect, and facilitation on the biodiversity effect: A modeling approach"
. Oecologia, vol. 174, no. 2, 2014, pp. 559-566.
http://dx.doi.org/10.1007/s00442-013-2775-8---------- VANCOUVER ----------
Flombaum, P., Sala, O.E., Rastetter, E.B. Interactions among resource partitioning, sampling effect, and facilitation on the biodiversity effect: A modeling approach. Oecologia. 2014;174(2):559-566.
http://dx.doi.org/10.1007/s00442-013-2775-8