| Site-specific climate sensitivity of tree-ring width and vessel anatomical features of Juglans regia L. in Bhutan Himalaya | |
Dema, Jambay1; Zaw, Zaw; Fan, Ze-Xin ; Panthi, Shankar; Fu, Pei-Li
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| 2024 | |
| Source Publication | GLOBAL ECOLOGY AND CONSERVATION
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| ISSN | 2351-9894 |
| Volume | 53Issue:_Pages:_ |
| Abstract | Climate change significantly impacts tree growth in the Himalayas, however, there is little information on how broadleaved tree species in Himalayan regions respond to climate change. Juglans regia L. (Common or Persian walnut) plays a vital economic and ecological role across the Himalayas, but little is known about how environmental changes influence the growth and wood anatomical traits of this species. In this study, we developed chronologies of tree-ring width (TRW) and six quantitative vessel anatomical features of Persian walnut trees from two sites in the Bhutan Himalayas. We evaluated how TRW and vessel anatomical features respond to climatic conditions and extreme climate events for the period 1960-2020. We found the climate sensitivity of tree growth differed at the two study sites, with the southwest-facing Dodeyna site (DOD) exhibiting higher moisture sensitivity than the north-facing Chimithangka site (CHI). The climate sensitivity of vessel traits was much stronger than that of tree-ring widths, particularly at the DOD. Hydraulic efficiency-related vessel traits (Mean vessel area, MVA; theoretical hydraulic conductivity, Kh; and hydraulic diameter, Dh) were positively sensitive to moisture availability, whereas the hydraulic safety-related vessel traits (vessel density, VD; and vessel grouping index, RVGI) were negatively sensitive to moisture availability at the DOD site. We further observed that MVA and Kh were significantly higher during extreme dry events at CHI site but displayed opposite directions at DOD site. Notably higher RVGI at the DOD site during dry years indicated an enhancement of hydraulic safety against drought. These findings highlight that the climate sensitivity of tree-ring width and vessel traits of walnuts were site-specific and mediated by aspects with the drier site (south-facing slope) being more sensitive. Whilst consideration of the aspects and site-specific climate sensitivity of tree species is crucial to developing robust forest conservation strategies at a larger spatial scale in the Himalayan region which is more vulnerable to climate change. |
| Keyword | Bhutan Himalaya Climate sensitivity Intra-annual variation Juglans regia Quantitative wood anatomy Tree rings Vessel anatomical features |
| Subject Area | Biodiversity Conservation ; Ecology |
| DOI | 10.1016/j.gecco.2024.e03023 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:001251598100001 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | https://ir.xtbg.ac.cn/handle/353005/14212 |
| Collection | 2012年后新成立研究组 |
| Affiliation | 1.Chinese Acad Sci, Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Mengla 666303, Yunnan, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Ailaoshan Stn Subtrop Forest Ecosyst Studies, Xishuangbanna Trop Bot Garden, Jingdong 676209, Yunnan, Peoples R China |
| Recommended Citation GB/T 7714 | Dema, Jambay,Zaw, Zaw,Fan, Ze-Xin,et al. Site-specific climate sensitivity of tree-ring width and vessel anatomical features of Juglans regia L. in Bhutan Himalaya[J]. GLOBAL ECOLOGY AND CONSERVATION,2024,53(_):_. |
| APA | Dema, Jambay,Zaw, Zaw,Fan, Ze-Xin,Panthi, Shankar,&Fu, Pei-Li.(2024).Site-specific climate sensitivity of tree-ring width and vessel anatomical features of Juglans regia L. in Bhutan Himalaya.GLOBAL ECOLOGY AND CONSERVATION,53(_),_. |
| MLA | Dema, Jambay,et al."Site-specific climate sensitivity of tree-ring width and vessel anatomical features of Juglans regia L. in Bhutan Himalaya".GLOBAL ECOLOGY AND CONSERVATION 53._(2024):_. |
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| Site-specific climat（4538KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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