Physiological and growth responses to increasing drought of an endangered tree species in southwest china
文献类型：期刊论文
| 作者 | Zheng, Wuji1; Gou, Xiaohua1; Su, Jiajia1; Fan, Haowen1; Yu, Ailing1; Liu, Wenhuo2; Deng, Yang1; Manzanedo, Ruben D.3,4; Fonti, Patrick5 |
| 刊名 | Forests
 |
| 出版日期 | 2019-06-01 |
| 卷号 | 10期号:6页码:17 |
| ISSN号 | 1999-4907 |
| 关键词 | Drought Fokienia hodginsii Southwest china Tree mortality Tree-ring Water-use efficiency Delta c-13 |
| DOI | 10.3390/f10060514 |
| 通讯作者 | Gou, xiaohua(xhgou@lzu.edu.cn) |
| 英文摘要 | Research highlights: we compared annually resolved records of tree-ring width and stable isotope of dead and surviving fokienia hodginsii (dunn) henry et thomas trees. we provide new insights into the relationships and sensitivity of tree growth to past and current climate, and explored the underlying mechanism of drought-induced mortality in f. hodginsii. background and objectives: drought-induced tree decline and mortality are increasing in many regions around the world. despite the high number of studies that have explored drought-induced decline, species-specific responses to drought still makes it difficult to apply general responses to specific species. the endangered conifer species, fokienia hodginsii, has experienced multiple drought-induced mortality events in recent years. our objective was to investigate the historical and current responses to drought of this species. materials and methods: we used annually resolved ring-width and delta c-13 chronologies to investigate tree growth and stand physiological responses to climate change and elevated co2 concentration (c-a) in both dead and living trees between 1960 and 2015. leaf intercellular co2 concentration (c-i), c-i/c-a and intrinsic water-use efficiency (iwue) were derived from delta c-13. results: delta c-13 were positively correlated with mean vapor pressure deficit and pdsi from previous october to current may, while ring widths were more sensitive to climatic conditions from previous june to september. moreover, the relationships between iwue, basal area increment (bai), and c-i/c-a changed over time. from 1960s to early 1980s, bai and iwue maintained a constant relationship with increasing atmospheric co2 concentration. after the mid-1980s, we observed a decrease in tree growth, increase in the frequency of missing rings, and an unprecedented increase in sensitivity of c-13 and radial growth to drought, likely related to increasingly dry conditions. conclusions: we show that the recent increase in water stress is likely the main trigger for the unprecedented decline in radial growth and spike in mortality of f. hodginsii, which may have resulted from diminished carbon fixation and water availability. given that the drought severity and frequency in the region is expected to increase in the future, our results call for effective mitigation strategies to maintain this endangered tree species. |
| 收录类别 | SCI |
| WOS关键词 | WATER-USE EFFICIENCY ; CARBON-ISOTOPE DISCRIMINATION ; CLIMATE-CHANGE ; HYDRAULIC SAFETY ; MORTALITY ; FORESTS ; MECHANISMS ; DECLINE ; PINE ; CO2 |
| WOS研究方向 | Forestry |
| WOS类目 | Forestry |
| 语种 | 英语 |
| 出版者 | MDPI |
| WOS记录号 | WOS:000475305000054 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2555388 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Gou, Xiaohua |
| 作者单位 | 1.Lanzhou Univ, Coll Earth & Environm Sci, Minist Educ, Key Lab Western Chinas Environm Syst, Lanzhou 73000, Gansu, Peoples R China 2.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 73000, Gansu, Peoples R China 3.Univ Washington, Biol Dept, Seattle, WA 98195 USA 4.Harvard Univ, Harvard Forest, Petersham, MA 01366 USA 5.WSL, Swiss Fed Inst Forest Snow & Landscape Res, CH-8903 Birmensdorf, Switzerland |
| 推荐引用方式 GB/T 7714 | Zheng, Wuji,Gou, Xiaohua,Su, Jiajia,et al. Physiological and growth responses to increasing drought of an endangered tree species in southwest china[J]. Forests,2019,10(6):17. |
| APA | Zheng, Wuji.,Gou, Xiaohua.,Su, Jiajia.,Fan, Haowen.,Yu, Ailing.,...&Fonti, Patrick.(2019).Physiological and growth responses to increasing drought of an endangered tree species in southwest china.Forests,10(6),17. |
| MLA | Zheng, Wuji,et al."Physiological and growth responses to increasing drought of an endangered tree species in southwest china".Forests 10.6(2019):17. |
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来源：寒区旱区环境与工程研究所
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