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Abstract:

Question: Are trait differences between grasses along a gradient related to climatic variables and/or photosynthetic pathway? Location: Temperate grassland areas of South and North America. Methods: In a common garden experiment, we cultivated C3 and C4 grasses from grasslands under different climatic conditions, and we measured a set of 12 plant traits related to size and resource capture and utilization. We described (1) interspecific plant trait differences along a climatic gradient defined by the precipitation and temperature at the location where each species is dominant and (2) the association between those plant trait differences and the photosynthetic pathway of the species. Results: Trait differences between grasses were related to the precipitation at the area where each species is dominant, and to the photosynthetic pathway of the species. Leaf length, leaf width, plant height, leaf area per tiller, specific leaf area, leaf δ13C ratio, and nitrogen resorption efficiency increased while leaf dry matter content and nitrogen concentration in senesced leaves decreased as precipitation increased. A proportion of these changes along the gradient was related to the photosynthetic pathway because dominant grass species in cold areas with low precipitation are mainly C3 and those from warm and wet areas are C4. Conclusions: A previous worldwide analysis showed that traits of graminoid species measured in situ changed slightly along climatic gradients (< 10% variance explained). In contrast, under a common environment we observed that (1) grass traits changed strongly along a climatic gradient (30-85% variance explained) and, (2) a proportion of those changes were related to the association between photosynthetic pathway of the species and precipitation. © IAVS; Opulus Press.

Registro:

Documento: Artículo
Título:Trait differences between grass species along a climatic gradient in South and North America
Autor:Oyarzabal, M.; Paruelo, J.M.; Del Pino, F.; Oesterheld, M.; Lauenroth, W.K.
Filiación:IFEVA, Departamento de Recursos Naturales Y Ambiente, CONICET, Av. San Martín 4453, Buenos Aires C1417DSE, Argentina
College of Natural Resources, Colorado State University, Fort Collins, CO 80523, United States
Palabras clave:Dominant grass; Plant trait; Precipitation; Temperate grassland; Temperature; C3 plant; C4 plant; climate conditions; grass; grassland; interspecific variation; photosynthesis; precipitation (climatology); temperate environment; temperature effect; North America; South America; Poaceae
Año:2008
Volumen:19
Número:2
Página de inicio:183
Página de fin:192
DOI: http://dx.doi.org/10.3170/2007-8-18349
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_v19_n2_p183_Oyarzabal

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Citas:

---------- APA ----------
Oyarzabal, M., Paruelo, J.M., Del Pino, F., Oesterheld, M. & Lauenroth, W.K. (2008) . Trait differences between grass species along a climatic gradient in South and North America. Journal of Vegetation Science, 19(2), 183-192.
http://dx.doi.org/10.3170/2007-8-18349
---------- CHICAGO ----------
Oyarzabal, M., Paruelo, J.M., Del Pino, F., Oesterheld, M., Lauenroth, W.K. "Trait differences between grass species along a climatic gradient in South and North America" . Journal of Vegetation Science 19, no. 2 (2008) : 183-192.
http://dx.doi.org/10.3170/2007-8-18349
---------- MLA ----------
Oyarzabal, M., Paruelo, J.M., Del Pino, F., Oesterheld, M., Lauenroth, W.K. "Trait differences between grass species along a climatic gradient in South and North America" . Journal of Vegetation Science, vol. 19, no. 2, 2008, pp. 183-192.
http://dx.doi.org/10.3170/2007-8-18349
---------- VANCOUVER ----------
Oyarzabal, M., Paruelo, J.M., Del Pino, F., Oesterheld, M., Lauenroth, W.K. Trait differences between grass species along a climatic gradient in South and North America. J. Veg. Sci. 2008;19(2):183-192.
http://dx.doi.org/10.3170/2007-8-18349