DOI: 10.1016/j.foreco.2015.11.029
Scopus记录号: 2-s2.0-84947793598
论文题名: Simultaneous assessment, through sap flow and stable isotopes, of water use efficiency (WUE) in thinned pines shows improvement in growth, tree-climate sensitivity and WUE, but not in WUEi
作者: Fernandes T.J.G. ; Del Campo A.D. ; Herrera R. ; Molina A.J.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 361 起始页码: 298
结束页码: 308
语种: 英语
英文关键词: Adaptive forest management
; Aleppo pine
; Dendroclimatology
; Hydrology-oriented silviculture
; Pinus halepensis
; Tree transpiration
Scopus关键词: Drought
; Efficiency
; Evapotranspiration
; Hydrology
; Isotopes
; Transpiration
; Water supply
; Aleppo pines
; Dendroclimatology
; Photosynthetic capacity
; Pinus halepensis
; Precipitation relationships
; Sap flow measurements
; Water-limited regions
; Water-use efficiency
; Forestry
; adaptive management
; climate change
; conceptual framework
; coniferous tree
; dendroclimatology
; ecophysiology
; forest management
; growth rate
; plantation forestry
; sap flow
; semiarid region
; thinning
; transpiration
; water use efficiency
; Pinus halepensis
英文摘要: In water-limited regions, adaptive management of forest and water relationships has been put forward, to implement hydrology-oriented silviculture to reduce stand evapotranspiration and, at the tree level, to improve growth and water use efficiency (WUE). The main goal of this study was to evaluate the effect of thinning in the short and medium term on tree growth, climate (drought) sensitivity, WUE performed using growth and sap flow measurements and WUEi performed using δ13C and δ18O isotopes, in a typical semiarid forest. This approach also evaluated the reliability of isotopes as indicators of the effects of adaptive forest management. A stagnated Aleppo pine plantation was experimentally thinned at high intensity (H98) in 1998 and at High (H), Medium (M) and Low (L) intensities in 2008, along with a control (C). Substantial limitation of tree growth was observed in C. Thinning not only increased growth, but also changed the tree growth-precipitation relationships, with C trees depending more on precipitation than thinned trees did. WUEi after thinning was significantly affected only in the medium term, with C trees being more efficient (94.4 μmolCO2/molH2O) than H98 trees (88.7), especially in dry spells (100.7). WUEi was found to increase when precipitation decreased, regardless of the treatment. However, WUE increased sharply from C (1.26g biomass/L H2O) to H (3.20g/L), showing a clear difference with WUEi observed in the same years. Thinning caused an increase in δ18O in the short term, but no relationship was found between δ18O and tree water use. It can be concluded that forest management improved WUE in spite of higher tree transpiration, but WUEi remained unchanged, probably due to an underestimate of photosynthetic capacity. The dual isotope (δ13C and δ18O) conceptual model was not consistent with our experimental data. Thus, the question of whether stable isotopes can be used as a tool for addressing the ecophysiological impacts of thinning remains open. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65142
Appears in Collections: 影响、适应和脆弱性
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作者单位: Forest Science and Technology Group (Re-ForeST), Research Institute of Water and Environmental Engineering (IIAMA), Universitat Politècnica de València, Camí de Vera s/n, Valencia, Spain; Centre of Ecology, Venezuelan Institute of Scientific Research (IVIC), Carretera Panamericana, km 11, Altos de Pipe, Caracas, Venezuela; Food and Agriculture Research and Technology (IRTA), Torre Marimon, Caldes de Montbui, Spain; Centre of Biological Sciences and Nature, Federal University of Acre, Rodovia BR-364, km 04, Rio Branco, Acre, Brazil
Recommended Citation:
Fernandes T.J.G.,Del Campo A.D.,Herrera R.,et al. Simultaneous assessment, through sap flow and stable isotopes, of water use efficiency (WUE) in thinned pines shows improvement in growth, tree-climate sensitivity and WUE, but not in WUEi[J]. Forest Ecology and Management,2016-01-01,361