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dc.contributor.author
Gyenge, Javier Enrique  
dc.contributor.author
Fernandez, Maria Elena  
dc.date.available
2017-10-02T18:40:11Z  
dc.date.issued
2014-01  
dc.identifier.citation
Gyenge, Javier Enrique; Fernandez, Maria Elena; Patterns of resource use efficiency in relation to intra-specific competition, size of the trees and resource availability in ponderosa pine; Elsevier Science; Forest Ecology and Management; 312; 1-2014; 231-238  
dc.identifier.issn
0378-1127  
dc.identifier.uri
http://hdl.handle.net/11336/25627  
dc.description.abstract
Patterns of resource use efficiency (RUE) in relation to intra-specific competition, size of the trees and resource availability are under debate. Also, the relationship between RUE and growth efficiency (GE) seems to be different depending on the genera studied. We test the following hypotheses: (1) RUE of the stand decreases after canopy closure mainly due to the decrease in RUE of the suppressed trees, (2) RUE increases with the availability of resources and/or stand productivity and, (3) the efficiency of use of water, light and nitrogen are positively correlated each other, and are not correlated with GE. We measured or estimated at tree and plot level, the concentration of 13C in wood as a proxy of intrinsic water use efficiency (iWUE), nitrogen productivity (NP), light use efficiency (LUE) and GE in Pinus ponderosa trees growing in two sites in Patagonia, South-America. Within each site, we studied plots with contrasting intra-specific competition due to different plantation density. A decrease in NP and GE at plot level followed canopy closure, with no decrease in LUE or iWUE. In contrast to Hypothesis 1, the decrease in RUE of a stand, when it was observed, was due to a decrease in the efficiency of resource use of the dominant trees. The suppressed trees seem to always have low RUE, independently of canopy closure of the stand. The trend of a positive relation of RUE and resource availability is rather weak as a generalization (in contrast to Hypothesis 2), but it depends on the resource which use efficiency is analyzed. At plot level, NP, iWUE and GE did not present a correlation with stand productivity. Considering iWUE, no positive correlation was observed with tree size, which contrasts with previous findings. On the other hand, clear and positive relationships were observed between GE and NP with tree growth, supporting the hypothesis of higher RUE in those trees which are growing faster within the stand, which in turn are those which are surely accessing to more resources (soil resources and radiation). The third hypothesis stated in this study was not supported by our results. The only significant correlation was that observed between NP and GE, with no correlation at all between iWUE and the other resources use or growth efficiency.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Elsevier Science  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Light Use Efficiency  
dc.subject
Growth Efficiency  
dc.subject
Nitrogen Use Efficiency  
dc.subject
Water Use Efficiency  
dc.subject
Pinus Ponderosa  
dc.subject.classification
Otras Agricultura, Silvicultura y Pesca  
dc.subject.classification
Agricultura, Silvicultura y Pesca  
dc.subject.classification
CIENCIAS AGRÍCOLAS  
dc.title
Patterns of resource use efficiency in relation to intra-specific competition, size of the trees and resource availability in ponderosa pine  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2017-09-29T14:43:41Z  
dc.journal.volume
312  
dc.journal.pagination
231-238  
dc.journal.pais
Países Bajos  
dc.journal.ciudad
Amsterdam  
dc.description.fil
Fil: Gyenge, Javier Enrique. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Buenos Aires Sur. Estación Experimental Agropecuaria Balcarce; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina  
dc.description.fil
Fil: Fernandez, Maria Elena. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Buenos Aires Sur. Estación Experimental Agropecuaria Balcarce; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina  
dc.journal.title
Forest Ecology and Management  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S037811271300666X  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.foreco.2013.09.052