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Abstract:

Questions: Do current models that predict shifting effects of herbivores on plant diversity with varying nutrient conditions apply to stressful systems like salt marshes? Do herbivores affect different components of the diversity as nutrient availability varies? Location: Salt marsh-salty steppe transition zone at the SW Atlantic Mar Chiquita coastal lagoon (37°44′52″S, 57°26′6″W), Argentina. Methods: We experimentally evaluated the separate and interactive effect of nutrients and rodent (Cavia aperea) herbivory, using exclosures and applying fertilizer (mostly nitrogen), following a factorial design in 50cm × 50cm plots. Results: We found a negative effect of herbivory on diversity in the resource-poor scenario (due to a reduction in species richness), but a positive effect when nutrients were added, by reducing the abundance of the dominant plant (and hence increasing evenness). Conclusions: Our experimental results contribute to the limited factorial evidence evaluating the role of nutrients and herbivory on the diversity of terrestrial plant communities, even in highly stressful environments like salt marsh-salty steppe transition zones. Our results also support the model that predicts negative effects of herbivores on plant diversity in low-nutrient conditions and positive effects in nutrient-enriched scenarios, and also support the mechanism assumed to act in these situations. © 2010 International Association for Vegetation Science.

Registro:

Documento: Artículo
Título:Joint control by rodent herbivory and nutrient availability of plant diversity in a salt marsh-salty steppe transition zone
Autor:Alberti, J.; Canepuccia, A.; Pascual, J.; Pérez, C.; Iribarne, O.
Filiación:Laboratorio de Ecología, Departamento de Biología (FCEyN), Universidad Nacional de Mar del Plata, CC 573 Correo Central. B7600WAG, Mar del Plata, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Rivadavia 1917, C1033AAJ, Ciudad Autónoma de Buenos Aires, Argentina
Departamento de Ciencias de la Atmósfera y los Océanos (FCEyN), Universidad Nacional de Buenos Aires. Pabellón II, 2do piso, 1428, Ciudad Autónoma de Buenos Aires, Argentina
Palabras clave:Competitive exclusion; Evenness; Nitrogen supply; Small mammal herbivore; Species richness; abundance; coastal lagoon; dominance; fertilizer application; herbivory; nitrogen; nutrient availability; nutrient enrichment; plant community; rodent; saltmarsh; species diversity; species richness; steppe; transition zone; Argentina; Atlantic Ocean; Atlantic Ocean (Southwest); Buenos Aires [Argentina]; Mar Chiquita Lagoon; Cavia; Cavia aperea; Mammalia; Rodentia
Año:2011
Volumen:22
Número:2
Página de inicio:216
Página de fin:224
DOI: http://dx.doi.org/10.1111/j.1654-1103.2010.01240.x
Título revista:Journal of Vegetation Science
Título revista abreviado:J. Veg. Sci.
ISSN:11009233
CODEN:JVESE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11009233_v22_n2_p216_Alberti

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Citas:

---------- APA ----------
Alberti, J., Canepuccia, A., Pascual, J., Pérez, C. & Iribarne, O. (2011) . Joint control by rodent herbivory and nutrient availability of plant diversity in a salt marsh-salty steppe transition zone. Journal of Vegetation Science, 22(2), 216-224.
http://dx.doi.org/10.1111/j.1654-1103.2010.01240.x
---------- CHICAGO ----------
Alberti, J., Canepuccia, A., Pascual, J., Pérez, C., Iribarne, O. "Joint control by rodent herbivory and nutrient availability of plant diversity in a salt marsh-salty steppe transition zone" . Journal of Vegetation Science 22, no. 2 (2011) : 216-224.
http://dx.doi.org/10.1111/j.1654-1103.2010.01240.x
---------- MLA ----------
Alberti, J., Canepuccia, A., Pascual, J., Pérez, C., Iribarne, O. "Joint control by rodent herbivory and nutrient availability of plant diversity in a salt marsh-salty steppe transition zone" . Journal of Vegetation Science, vol. 22, no. 2, 2011, pp. 216-224.
http://dx.doi.org/10.1111/j.1654-1103.2010.01240.x
---------- VANCOUVER ----------
Alberti, J., Canepuccia, A., Pascual, J., Pérez, C., Iribarne, O. Joint control by rodent herbivory and nutrient availability of plant diversity in a salt marsh-salty steppe transition zone. J. Veg. Sci. 2011;22(2):216-224.
http://dx.doi.org/10.1111/j.1654-1103.2010.01240.x