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在全球气候变化背景下,明确评估树木生长对气候变化的响应机制,包括年际、年内径向生长变化及其物候现象,是深刻了解现在森林生态系统中树木生长状况及精准模拟其未来生长态势所必须的前提条件。另外,研究年内树木径向生长与气候因子的关系将会更加丰富当前从传统树轮气候学或树轮生态学研究中所得到的认识。然而,目前在高分辨率水平上(年内)直接观测树木径向生长变化对气候因子响应过程的方法或手段仍然有限。其中,微树芯方法以其独特的优势而得到了广泛的应用,尤其是在欧洲及北美加拿大地区,但在热带及亚洲的研究还相对较少。涉及内容除其最直接的监测树木径向生长变化外,也开展了不同方面的对比研究,如分析年龄效应、海拔效应、健康状况等对树木生长的影响。此外,研究者也在部分区域尝试了控制对比试验,如探讨了人为增温/冷却、干旱胁迫、森林抚育间伐措施是如何影响树木径向生长变化的。本文就以上各方面进行了详细评述。
In the context of global climate change, the mechanism of tree growth response to climate change is explicitly assessed, including radial growth changes and phenological phenomena during the year and the year, a profound understanding of the current tree growth status in forest ecosystems and the accurate simulation of its future growth trend The necessary preconditions. In addition, the study of the relationship between tree radial growth and climatic factors during the year will further enrich the current understanding gained from traditional tree ring climatology or tree ring ecology. However, there are still limited methods or means for directly observing the response of tree radial growth to climate factors at the high resolution level (during the year). Among them, the micro-tree core method has been widely used for its unique advantages, especially in Europe and North America and Canada, but there are relatively few studies in the tropics and Asia. In addition to its most direct monitoring of the radial growth of trees, but also carried out a comparative study of different aspects, such as analysis of age effects, altitude effects, health effects on the growth of trees. In addition, the researchers also tried to control comparative experiments in some areas. For example, it explored how man-made warming / cooling, drought stress and forest tending and thinning measures affect the radial growth of trees. This article has carried on the detailed commentary to all above aspects.