Two bromeliad species with contrasting functional traits partition the understory space in a South American xerophytic forest correlative evidence of environmental control and limited dispersal
We examined the spatial distribution of two bromeliad species with contrasting functional traits in the understory of a xerophytic South American Chaco forest. Aechmea distichantha is a facultative terrestrial species with well-developed phytotelma and short rhizomes, whereas Bromelia serra is a str...
| Otros Autores: | , , , , , |
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| Formato: | Artículo |
| Lenguaje: | Español |
| Materias: | |
| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2014barberis.pdf LINK AL EDITOR |
| Aporte de: | Registro referencial: Solicitar el recurso aquí |
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| 245 | 1 | 0 | |a Two bromeliad species with contrasting functional traits partition the understory space in a South American xerophytic forest |b correlative evidence of environmental control and limited dispersal |
| 520 | |a We examined the spatial distribution of two bromeliad species with contrasting functional traits in the understory of a xerophytic South American Chaco forest. Aechmea distichantha is a facultative terrestrial species with well-developed phytotelma and short rhizomes, whereas Bromelia serra is a strictly terrestrial species with soil-exploring roots and long rhizomes. Both bromeliads develop colonies on relatively elevated patches in Schinopsis balansae forests. We evaluated the roles of environmental controls, limited dispersal, and interspecific competition as drivers of the different distribution of these bromeliads. We mapped the overstory, understory and topography of 16 forest plots with bromeliads [400 m2 each, subdivided in 100 4-m2 subplots]. We sampled soil characteristics on sectors dominated by each bromeliad species. We used structural equation modeling to assess direct and indirect associations of each bromeliad species cover with environmental conditions, abundance of conspecifics in the vicinity, and local abundance of the other species. A. distichantha cover increased on elevated subplots with high tree/shrub basal area, whereas B. serra cover showed the opposite pattern. In addition, A. distichantha cover was negatively associated with B. serra cover, but not vice versa, and cover of both species increased with the abundance of nearby conspecifics, suggesting that limited vegetative dispersal partly accounted for their distribution. Sectors dominated by A. distichantha had lower soil bulk density and higher organic matter content than those dominated by B. serra. According to our model, influences of competition and limited vegetative dispersal reinforce the association between distribution of these bromeliads and environmental heterogeneity of the forest understory. | ||
| 653 | 0 | |a AECHMEA DISTICHANTHA | |
| 653 | 0 | |a BROMELIA | |
| 653 | 0 | |a BROMELIA SERRA | |
| 653 | 0 | |a BROMELIADS | |
| 653 | 0 | |a BULK DENSITY | |
| 653 | 0 | |a COMPETITION | |
| 653 | 0 | |a CONSPECIFIC | |
| 653 | 0 | |a CORRELATION | |
| 653 | 0 | |a DISPERSAL | |
| 653 | 0 | |a FUNCTIONAL CHANGE | |
| 653 | 0 | |a GRAN CHACO | |
| 653 | 0 | |a HETEROGENEITY | |
| 653 | 0 | |a MONOCOTYLEDON | |
| 653 | 0 | |a NICHE | |
| 653 | 0 | |a OVERSTORY | |
| 653 | 0 | |a RHIZOME | |
| 653 | 0 | |a SCHINOPSIS BALANSAE | |
| 653 | 0 | |a SOIL ORGANIC MATTER | |
| 653 | 0 | |a SPATIAL DISTRIBUTION | |
| 653 | 0 | |a UNDERSTORY | |
| 700 | 1 | |9 7425 |a Barberis, Ignacio M. | |
| 700 | 1 | |a Torres, Patricia S. |9 72803 | |
| 700 | 1 | |a Batista, William Bennett |9 12935 | |
| 700 | 1 | |a Magra, Gustavo |9 43441 | |
| 700 | 1 | |a Galetti, Luciano |9 72804 | |
| 700 | 1 | |a Lewis, Juan Pablo |9 41806 | |
| 773 | |t Plant Ecology |g vol.215, no.2 (2014), p.143-153 | ||
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| 900 | |a ^tTwo bromeliad species with contrasting functional traits partition the understory space in a South American xerophytic forest^sCorrelative evidence of environmental control and limited dispersal | ||
| 900 | |a ^aBarberis^bI.M. | ||
| 900 | |a ^aTorres^bP.S. | ||
| 900 | |a ^aBatista^bW.B. | ||
| 900 | |a ^aMagra^bG. | ||
| 900 | |a ^aGaletti^bL. | ||
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| 900 | |a ^aBarberis^bI. M. | ||
| 900 | |a ^aTorres^bP. S. | ||
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| 900 | |a ^aLewis^bJ. P. | ||
| 900 | |a Barberis, I.M. Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, C.C. 14, S2125ZAA Zavalla, Argentina | ||
| 900 | |a Barberis, I.M. CONICET, Buenos Aires, Argentina | ||
| 900 | |a Torres, P.S. Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, C.C. 14, S2125ZAA Zavalla, Argentina | ||
| 900 | |a Torres, P.S. CIUNR, Buenos Aires, Argentina | ||
| 900 | |a Batista, W.B. IFEVA, CONICET and Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453, C1417DSQ Buenos Aires, Argentina | ||
| 900 | |a Magra, G. Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, C.C. 14, S2125ZAA Zavalla, Argentina | ||
| 900 | |a Galetti, L. Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, C.C. 14, S2125ZAA Zavalla, Argentina | ||
| 900 | |a Lewis, J.P. Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, C.C. 14, S2125ZAA Zavalla, Argentina | ||
| 900 | |a Lewis, J.P. CONICET, Buenos Aires, Argentina | ||
| 900 | |a ^tPlant Ecology^cPlant Ecol. | ||
| 900 | |a eng | ||
| 900 | |a 143 | ||
| 900 | |a ^i | ||
| 900 | |a Vol. 215, no. 2 | ||
| 900 | |a 153 | ||
| 900 | |a AECHMEA DISTICHANTHA | ||
| 900 | |a BROMELIA | ||
| 900 | |a BROMELIA SERRA | ||
| 900 | |a BROMELIADS | ||
| 900 | |a BULK DENSITY | ||
| 900 | |a COMPETITION | ||
| 900 | |a CONSPECIFIC | ||
| 900 | |a CORRELATION | ||
| 900 | |a DISPERSAL | ||
| 900 | |a FUNCTIONAL CHANGE | ||
| 900 | |a GRAN CHACO | ||
| 900 | |a HETEROGENEITY | ||
| 900 | |a MONOCOTYLEDON | ||
| 900 | |a NICHE | ||
| 900 | |a OVERSTORY | ||
| 900 | |a RHIZOME | ||
| 900 | |a SCHINOPSIS BALANSAE | ||
| 900 | |a SOIL ORGANIC MATTER | ||
| 900 | |a SPATIAL DISTRIBUTION | ||
| 900 | |a UNDERSTORY | ||
| 900 | |a We examined the spatial distribution of two bromeliad species with contrasting functional traits in the understory of a xerophytic South American Chaco forest. Aechmea distichantha is a facultative terrestrial species with well-developed phytotelma and short rhizomes, whereas Bromelia serra is a strictly terrestrial species with soil-exploring roots and long rhizomes. Both bromeliads develop colonies on relatively elevated patches in Schinopsis balansae forests. We evaluated the roles of environmental controls, limited dispersal, and interspecific competition as drivers of the different distribution of these bromeliads. We mapped the overstory, understory and topography of 16 forest plots with bromeliads [400 m2 each, subdivided in 100 4-m2 subplots]. We sampled soil characteristics on sectors dominated by each bromeliad species. We used structural equation modeling to assess direct and indirect associations of each bromeliad species cover with environmental conditions, abundance of conspecifics in the vicinity, and local abundance of the other species. A. distichantha cover increased on elevated subplots with high tree/shrub basal area, whereas B. serra cover showed the opposite pattern. In addition, A. distichantha cover was negatively associated with B. serra cover, but not vice versa, and cover of both species increased with the abundance of nearby conspecifics, suggesting that limited vegetative dispersal partly accounted for their distribution. Sectors dominated by A. distichantha had lower soil bulk density and higher organic matter content than those dominated by B. serra. According to our model, influences of competition and limited vegetative dispersal reinforce the association between distribution of these bromeliads and environmental heterogeneity of the forest understory. | ||
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