Refuge effect of an unpalatable forb on community structure and grass morphology in a temperate grassland
The role of unpalatable plant species as biological antiherbivore refuges for palatable species is well-documented at community level particularly in harsh environments. In productive sub-humid temperate grassland subjected to domestic grazing, we examined the protective effect of Eryngium horridum...
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| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2013noellestape.pdf LINK AL EDITOR |
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| 100 | 1 | |a Noëll Estapé, Silvana E. |9 31342 | |
| 245 | 0 | 0 | |a Refuge effect of an unpalatable forb on community structure and grass morphology in a temperate grassland |
| 520 | |a The role of unpalatable plant species as biological antiherbivore refuges for palatable species is well-documented at community level particularly in harsh environments. In productive sub-humid temperate grassland subjected to domestic grazing, we examined the protective effect of Eryngium horridum on plant community structure and floristic composition, and evaluated whether these changes impacted on a number of morphological traits of grasses, related to grazing resistance. We also investigated, for a palatable grass species [Stipa neesiana] the existence of morphological differences between protected and unprotected plants and if this eventual variation was either plastic or genetic. The study consisted of a field survey where we compared paired patches, with and without E. horridum, and a greenhouse experiment where we evaluated individuals of S. neesiana coming from both patch types over a 11 months period. Patches dominated by E. horridum had lower richness and cover of forbs than patches without the forb, and similar richness but greater cover of cool-season tussock palatable grasses, which suggests a protective role on the latter. Grasses in these patches also had longer blades and sheaths and lower specific leaf area. The morphological differences of S. neesiana individuals collected from both patch types disappeared after 11 months growth in a common environment which revealed significant phenotypic plasticity in this species. These results suggest the existence of plant-to-plant facilitation in a productive ecosystem not only at community level, through changes in species richness and the promotion of palatable grasses, but also at population level, through plastic changes in aboveground morphological traits. Both facilitation and plasticity, would contribute to the persistence of threatened palatable grasses in the heavy grazed productive ecosystems. | ||
| 653 | 0 | |a ERYNGIUM HORRIDUM | |
| 653 | 0 | |a INDIRECT FACILITATION | |
| 653 | 0 | |a PHENOTYPIC PLASTICITY | |
| 653 | 0 | |a PLANT-PLANT INTERACTIONS | |
| 653 | 0 | |a POSITIVE RELATIONSHIPS | |
| 653 | 0 | |a STIPA NEESIANA | |
| 653 | 0 | |a COMMUNITY STRUCTURE | |
| 653 | 0 | |a FACILITATION | |
| 653 | 0 | |a FIELD SURVEY | |
| 653 | 0 | |a GRASS | |
| 653 | 0 | |a GRASSLAND | |
| 653 | 0 | |a GRAZING | |
| 653 | 0 | |a PERSISTENCE | |
| 653 | 0 | |a PLANT COMMUNITY | |
| 653 | 0 | |a REFUGE | |
| 653 | 0 | |a SPECIES RICHNESS | |
| 653 | 0 | |a TEMPERATE ENVIRONMENT | |
| 653 | 0 | |a ERYNGIUM | |
| 653 | 0 | |a NASSELLA NEESIANA | |
| 653 | 0 | |a POACEAE | |
| 700 | 1 | |9 7454 |a Semmartin, María | |
| 700 | 1 | |9 788 |a Paruelo, José María | |
| 773 | |t Plant Ecology |g vol.214, no.3 (2013), p.363-372 | ||
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| 900 | |a 10.1007/s11258-013-0173-2 | ||
| 900 | |a ^tRefuge effect of an unpalatable forb on community structure and grass morphology in a temperate grassland | ||
| 900 | |a ^aNoëll Estapé^bS.E. | ||
| 900 | |a ^aSemmartin^bM. | ||
| 900 | |a ^aParuelo^bJ.M. | ||
| 900 | |a ^aNoëll Estapé^bS. E. | ||
| 900 | |a ^aSemmartin^bM. | ||
| 900 | |a ^aParuelo^bJ. M. | ||
| 900 | |a ^aNoëll Estapé, S.E.^tFacultad de Agronomía, Departamento de Producción Animal y Pasturas, Estacion Experimental Dr. Mario A. Cassinoni, Universidad de la República, Ruta 3 km 363, C.P. 60000 Paysandú, Uruguay | ||
| 900 | |a ^aSemmartin, M.^tFacultad de Agronomía, Instituto de Investigaciones Fisiológicas y Ecologicas Vinculadas a la Agricultura (IFEVA), Universidad de Buenos Aires, Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Av. San Martín 4453, C1417DSE Buenos Aires, Argentina | ||
| 900 | |a ^aParuelo, J.M.^tFacultad de Agronomía, Instituto de Investigaciones Fisiológicas y Ecologicas Vinculadas a la Agricultura (IFEVA), Universidad de Buenos Aires, Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Av. San Martín 4453, C1417DSE Buenos Aires, Argentina | ||
| 900 | |a ^aParuelo, J.M.^tLaboratorio de Análisis Regional y Teledetección, Departamento de Métodos Cuantitativos y Sistemas de Informacion, Facultad de Agronomia, Universidad de Buenos Aires, Buenos Aires, Argentina | ||
| 900 | |a ^tPlant Ecology^cPlant Ecol. | ||
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| 900 | |a 363 | ||
| 900 | |a ^i | ||
| 900 | |a Vol. 214, no. 3 | ||
| 900 | |a 372 | ||
| 900 | |a ERYNGIUM HORRIDUM | ||
| 900 | |a INDIRECT FACILITATION | ||
| 900 | |a PHENOTYPIC PLASTICITY | ||
| 900 | |a PLANT-PLANT INTERACTIONS | ||
| 900 | |a POSITIVE RELATIONSHIPS | ||
| 900 | |a STIPA NEESIANA | ||
| 900 | |a COMMUNITY STRUCTURE | ||
| 900 | |a FACILITATION | ||
| 900 | |a FIELD SURVEY | ||
| 900 | |a GRASS | ||
| 900 | |a GRASSLAND | ||
| 900 | |a GRAZING | ||
| 900 | |a PERSISTENCE | ||
| 900 | |a PLANT COMMUNITY | ||
| 900 | |a REFUGE | ||
| 900 | |a SPECIES RICHNESS | ||
| 900 | |a TEMPERATE ENVIRONMENT | ||
| 900 | |a ERYNGIUM | ||
| 900 | |a NASSELLA NEESIANA | ||
| 900 | |a POACEAE | ||
| 900 | |a The role of unpalatable plant species as biological antiherbivore refuges for palatable species is well-documented at community level particularly in harsh environments. In productive sub-humid temperate grassland subjected to domestic grazing, we examined the protective effect of Eryngium horridum on plant community structure and floristic composition, and evaluated whether these changes impacted on a number of morphological traits of grasses, related to grazing resistance. We also investigated, for a palatable grass species [Stipa neesiana] the existence of morphological differences between protected and unprotected plants and if this eventual variation was either plastic or genetic. The study consisted of a field survey where we compared paired patches, with and without E. horridum, and a greenhouse experiment where we evaluated individuals of S. neesiana coming from both patch types over a 11 months period. Patches dominated by E. horridum had lower richness and cover of forbs than patches without the forb, and similar richness but greater cover of cool-season tussock palatable grasses, which suggests a protective role on the latter. Grasses in these patches also had longer blades and sheaths and lower specific leaf area. The morphological differences of S. neesiana individuals collected from both patch types disappeared after 11 months growth in a common environment which revealed significant phenotypic plasticity in this species. These results suggest the existence of plant-to-plant facilitation in a productive ecosystem not only at community level, through changes in species richness and the promotion of palatable grasses, but also at population level, through plastic changes in aboveground morphological traits. Both facilitation and plasticity, would contribute to the persistence of threatened palatable grasses in the heavy grazed productive ecosystems. | ||
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