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  Response of climate-growth relationships and water use efficiency to thinning in a Pinus nigra afforestation

Martín-Benito, D., Del Río, M., Heinrich, I., Helle, G., Cañellas, I. (2010): Response of climate-growth relationships and water use efficiency to thinning in a Pinus nigra afforestation. - Forest Ecology and Management, 259, 5, 967-975.
https://doi.org/10.1016/j.foreco.2009.12.001

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_240396 Version Permalink: -
Genre: Journal Article

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 Creators:
Martín-Benito, D.1, Author
Del Río, M.1, Author
Heinrich, Ingo2, Author              
Helle, Gerhard2, Author              
Cañellas, I.1, Author
Affiliations:
1External Organizations, ou_persistent22              
25.2 Climate Dynamics and Landscape Evolution, 5.0 Earth Surface Processes, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_146046              

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Free keywords: Tree-rings; Stem growth; Forest management; Carbon and oxygen isotopes; Black pine; Competition
 DDC: 550 - Earth sciences
 Abstract: Thinning is the main forestry measure to increase tree growth by reducing stand tree density and competition for resources. A thinning experiment was established in 1993 on a 32-year-old Pinus nigra Arn. stand in central Spain. The response of growth, climate-growth relationships and intrinsic water use efficiency (WUEi) to a stand density reduction were compared between moderate thinned plots and a control plot by a combined analysis of basal area increments (BAI), and C and O stable isotope ratios (delta C-13(c) and delta O-18(c)). BAI in the control plot showed a decreasing trend that was avoided by thinning in the thinned plot. Thinning also partially buffered tree-ring response to climate and trees were less sensitive to precipitation although more sensitive to temperature. Delta C-13(c) in the thinned plot was not modified indicating that stomatal conductance (g) and photosynthetic capacity (A) did not change or change in the same direction. However, delta O-18(c) decreased in the control plot (unrelated to delta O-18 of precipitation) but not in the thinned plot, suggesting a relative increase of temperature and irradiance and/or a decrease of air humidity after reducing the density consistent with an increase in A, g and BAI. As WUEi did not increase in the thinned plot, faster growth in this plot was caused by higher abundance of resources per tree. The trend of WUEi in both plots indicated low-moderate CO2-induced improvements. Thinning might be a useful adaptation measure against climate change in these plantations reducing their vulnerability to droughts. However, because WUEi was not affected, the positive growth response might be limited if droughts and warming continue and certain thresholds are exceeded.

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 Dates: 2010
 Publication Status: Finally published
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 14726
GFZPOF: PT2 Earth System Dynamics: Coupled Processes and Regional Impact
DOI: 10.1016/j.foreco.2009.12.001
 Degree: -

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Title: Forest Ecology and Management
Source Genre: Journal, SCI, Scopus
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Pages: - Volume / Issue: 259 (5) Sequence Number: - Start / End Page: 967 - 975 Identifier: CoNE: https://gfzpublic.gfz-potsdam.de/cone/journals/resource/journals147