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- Title
暖干化加剧东北半干旱地区油松人工林径向生长的水分限制.
- Authors
赵莹; 蔡立新; 靳雨婷; 李俊霞; 崔迪; 陈振举
- Abstract
Plantation ecosystems are more vulnerable than natural ones to global climate change. Using the dendrochronology method, we established tree-ring width chronologies of Pinus tabuliformis distributed in the semi-arid region of Northeast China. We examined its growth dynamics, analyzed the relationship between radical growth and climate factors, and explored the effects of global warming on the growth and distribution of P. tabuliformis. The results showed that tree-ring width chronologies of P. tabuliformis were negatively correlated with mean temperature of growing season (May-July), and positively correlated with precipitation and Palmer drought severity index (PDSI) in the early growing season (April) and in the growing season (May-July). Water availability was the main limiting factor for the radial growth of P. tabuliformis. Along the increasing precipitation gradient from southwest to northeast, tree growth became more sensitive to annual mean temperature, and the correlation with annual precipitation shifted from positive to negative, indicating that tree growth in the relative arid area (southwest of the study area) was more severely restricted by water availability. Drought stress caused by climate warming resulted in growth declines at some sites in the southwest area. With the continuous warming-drying climate, the distribution boundary of P. tabuliformis in the study area would shrink locally, with the suitable growth boundary moving northward.
- Subjects
ARID regions; CLIMATE change; TREE growth; GROWING season; WATER supply
- Publication
Yingyong Shengtai Xuebao, 2021, Vol 32, Issue 10, p3459
- ISSN
1001-9332
- Publication type
Article
- DOI
10.13287/j.1001-9332.202110.034