干旱区生态环境知识资源中心(Arid): Sparse Pinus tabuliformis Stands Have Higher Canopy Transpiration Than Dense Stands Three Decades after Thinning

Arid

DOI	10.3390/f11010070
	Sparse Pinus tabuliformis Stands Have Higher Canopy Transpiration Than Dense Stands Three Decades after Thinning
	Chen, Zuosinan 1; Zhang, Zhiqiang 1; Chen, Lixin 1; Cai, Yongmao 2; Zhang, Haiquan 3; Lou, Junpeng 1; Xu, Zhou 1; Xu, Hang 1; Song, Conghe 4
通讯作者	Zhang, Zhiqiang
来源期刊	FORESTS
EISSN	1999-4907
出版年	2020
卷号	11 期号:1
英文摘要	Hydrological effects of forest thinning have been studied at small watershed scales using the paired watershed approach since the 1920s. However, how forest transpiration, a critical component of evapotranspiration, changes decades after thinning is not well understood despite its importance for modifying drought resilience of forest ecosystem under climate change. In a semi-arid mountainous area of northern China, we measured growing season sap flow of Pinus tabuliformis, a widely planted afforestation species, in 44-year-old monoculture plantation stands with low (983 stems ha(-1)), medium (1688 stems ha(-1)), and high (2160 stems ha(-1)) density. Three decades after thinning, diameters at breast height (DBH) were larger in sparse stands than in dense stands. While its relation with sapwood area was density independent, the accompanying high sapwood area at the tree level for sparse stands resulted the highest stand sapwood area in the medium density stand (33.26 m(2) ha(-1)), rather than in the high density stand (29.84 m(2) ha(-1)). Similar to short-term studies, sparse stands demonstrated higher sensitivity to climatic fluctuations and drought depressions than dense ones. Nevertheless, stand density had no effect on the isohydric strategy of Pinus tabuliformis. Contrary to the positive relation between stand density and stand canopy transpiration soon after thinning, sparse stands exhibited higher growing season canopy transpiration than dense stands three decades later. In the dry year 2014, these density differences were relatively most pronounced, with July-September transpiration totals of 56.7 mm, 31.1 mm, and 22.1 mm in the low, medium, and high density stands, respectively. Our findings highlighted that stand density was not an appropriate indicator of thinned forest transpiration over long time scales. Interactions between soil droughts and thinning on forest transpiration need to be further clarified, especially in longer periods of time.
英文关键词	thinning stand density sap flow transpiration DBH sapwood area soil water content climatic response physiological control
类型	Article
语种	英语
国家	Peoples R China ; USA
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000513184500070
WOS关键词	XYLEM SAP FLOW ; VAPOR-PRESSURE DEFICIT ; NORWAY SPRUCE STANDS ; STOMATAL CONDUCTANCE ; JAPANESE CYPRESS ; SOIL-WATER ; FLUX-DENSITY ; SAPWOOD AREA ; URBAN TREES ; OAK FOREST
WOS类目	Forestry
WOS研究方向	Forestry
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314531
作者单位	1.Beijing Forestry Univ, Coll Soil & Water Conservat, Key Lab Soil & Water Conservat, State Forestry & Grassland Adm, Beijing 100083, Peoples R China; 2.Badaling Forest Farm, Beijing 102112, Peoples R China; 3.Gongqing Forest Farm, Beijing 101300, Peoples R China; 4.Univ North Carolina Chapel Hill, Dept Geog, Chapel Hill, NC 27599 USA
推荐引用方式 GB/T 7714	Chen, Zuosinan,Zhang, Zhiqiang,Chen, Lixin,et al. Sparse Pinus tabuliformis Stands Have Higher Canopy Transpiration Than Dense Stands Three Decades after Thinning[J]. 北京林业大学,2020,11(1).
APA	Chen, Zuosinan.,Zhang, Zhiqiang.,Chen, Lixin.,Cai, Yongmao.,Zhang, Haiquan.,...&Song, Conghe.(2020).Sparse Pinus tabuliformis Stands Have Higher Canopy Transpiration Than Dense Stands Three Decades after Thinning.FORESTS,11(1).
MLA	Chen, Zuosinan,et al."Sparse Pinus tabuliformis Stands Have Higher Canopy Transpiration Than Dense Stands Three Decades after Thinning".FORESTS 11.1(2020).