Spatial and temporal patterns of the sensitivity of radial growth response by Picea schrenkiana to regional climate change in the Tianshan Mountains
Spatial and temporal patterns of the sensitivity of radial growth response by Picea schrenkiana to regional climate change in the Tianshan Mountains
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DOI：
10.1007/s11676-023-01629-y
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发表时间：
2023-06
影响因子：
3
通讯作者：
Zhongtong Peng;Yuandong Zhang;Liangjun Zhu;Mingming Guo;Qingao Lu;Kun Xu;H. Shao;Qifeng Mo;Shirong Liu
中科院分区：
文献类型：
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作者：
Zhongtong Peng;Yuandong Zhang;Liangjun Zhu;Mingming Guo;Qingao Lu;Kun Xu;H. Shao;Qifeng Mo;Shirong Liu
气候变化对干旱半干旱区森林生态系统影响显著。然而，在气候变暖和降水增加的条件下，中国西北地区单株树木生长的气候敏感变化时空格局尚不清楚。采用树木年代学方法研究了1990—2020年6个站点158株雪杉径向生长的气候响应敏感性。结果表明，气候变暖和降水增加显著促进了树木的生长。对温度的反应先增强后减弱。然而，对降水增加和自校准Palmer干旱严重指数（scPDSI）的响应显著增加。在天山大部分地区，降水量增加和scPDSI正响应下的乔木比例相对较高。随着时间的推移，小直径树木受到干旱胁迫的影响强烈。预测在持续增温和降水增加的情况下，天山大部分地区的树木，尤其是小直径树木受降水的影响更大。
Climate change significantly impacts forest ecosystems in arid and semi-arid regions. However, spatiotemporal patterns of climate-sensitive changes in individual tree growth under increased climate warming and precipitation in north–west China is unclear. The dendrochronological method was used to study climate response sensitivity of radial growth ofPicea schrenkianafrom 158 trees at six sites during 1990–2020. The results show that climate warming and increased precipitation significantly promoted the growth of trees. The response to temperature first increased, then decreased. However, the response to increased precipitation and the self-calibrating Palmer Drought Severity Index (scPDSI) increased significantly. In most areas of the Tianshan Mountains, the proportion of trees under increased precipitation and scPDSI positive response was relatively high. Over time, small-diameter trees were strongly affected by drought stress. It is predicted that under continuous warming and increased precipitation, trees in most areas of the Tianshan Mountains, especially those with small diameters, will be more affected by precipitation.