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dc.contributor.author
Altesor, Alice
dc.contributor.author
Leoni, Elsa
dc.contributor.author
Guido, Anaclara
dc.contributor.author
Paruelo, José
dc.date.available
2018-12-07T20:26:12Z
dc.date.issued
2017-02
dc.identifier.citation
Altesor, Alice; Leoni, Elsa; Guido, Anaclara; Paruelo, José; Differential responses of three grasses to defoliation, water and light availability; Springer; Plant Ecology; 218; 2; 2-2017; 95-104
dc.identifier.issn
1385-0237
dc.identifier.uri
http://hdl.handle.net/11336/66101
dc.description.abstract
Grazing not only modifies the structure and functioning of grasslands, it also changes micro-environmental conditions that alter the availability of resources. The aim of this study was to analyze the response of grasses with different photosynthetic pathways (C3/C4), growth forms (prostrate/erect), and grazing responses (increaser/decreaser) to defoliation and resource availability. In a greenhouse, we performed a factorial experiment with three factors: defoliation, light, and water and three species: Axonopus affinis (C4 prostrate, increaser), Coelorachis selloana (C4 erect, decreaser), and Bromus auleticus (C3 erect, decreaser). We measured the relative growth rate (RGR), biomass assignment, and specific leaf area. The RGR of both C4 species was affected by light availability, while the decreaser C3 did not respond to any factor. Biomass allocation to leaves and stolons changed with the interaction between light and water in the C4 prostrate species (increaser). In the C4 erect grass (decreaser), biomass allocation was more affected by defoliation under low levels of light and water. Low light availability and defoliation reduced the assignment to leaves, while the allocation to rhizomes increased. Species-specific responses to resources availability that are modified by grazing were related to photosynthetic pathway, growth form, and grazing responses. Biomass allocation was related to strategies to avoid and/or tolerate grazing. The investment to leaves was limited by light and water availability in prostrate species, while in erect grasses it was controlled by defoliation and water availability. Our results highlight the importance of species responses to changes in resource availability associated to grazing regimes.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
C3
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C4
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Decreasers
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Grazing Response
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Growth Form
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Growth Rate
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Increasers
dc.subject.classification
Agricultura
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Agricultura, Silvicultura y Pesca
dc.subject.classification
CIENCIAS AGRÍCOLAS
dc.title
Differential responses of three grasses to defoliation, water and light availability
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-11-12T13:24:22Z
dc.journal.volume
218
dc.journal.number
2
dc.journal.pagination
95-104
dc.journal.pais
Países Bajos
dc.journal.ciudad
Dordrecht
dc.description.fil
Fil: Altesor, Alice. Universidad de la República; Uruguay
dc.description.fil
Fil: Leoni, Elsa. Universidad de la República; Uruguay
dc.description.fil
Fil: Guido, Anaclara. Universidade Federal do Rio Grande do Sul; Brasil
dc.description.fil
Fil: Paruelo, José. Universidad de la República; Uruguay. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía; Argentina
dc.journal.title
Plant Ecology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s11258-016-0669-7
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1007/s11258-016-0669-7
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