灌木年轮生态学研究进展

doi:10.13287/j.1001-9332.202206.006

摘要/Abstract

摘要： 灌木年轮资料的生态学价值逐渐受到人们关注,灌木年轮数据逐步被用于揭示灌丛植被年际生长对气候响应的敏感性研究中,目前用于灌木年轮学研究的主要灌木种已近70种。灌木年轮材料拓宽了传统以乔木树种为主的树轮研究网络,丰富了树木年轮学的研究范围和研究对象,在揭示灌丛生态系统结构、功能、服务的时间变化特征上具有重要生态学价值。本文收集整理了1996—2021年间的灌木年轮学研究成果,综述灌木年轮学在生理学、气候学、生态学、水文学领域的研究进展。阐述了不同环境胁迫条件下灌木生长和木质部解剖特征;揭示了不同气候条件下灌木物种径向生长的主要限制性因素,以及基于灌木年轮材料记录的区域气候波动历史;评估了灌木物种径向生长和种群动态的气候和非气候因素驱动的灌丛生态系统变化特征;论述了灌木年轮资料在重建区域水文要素变化历史方面的研究。在全球气候变暖不断加剧的背景下,我国灌木年轮学研究应着重关注干旱半干旱区不同水分条件下灌木物种径向生长对干旱胁迫的响应规律,以及在气候变化背景下灌木物种空间分布及其气候响应敏感性的转型特征方面研究。

关键词: 灌木年轮, 木质部解剖, 气候变化, 生态响应, 水文响应

Abstract: The ecological value of shrub-ring data has received more and more attention. The tree-ring data of shrub species have been increasingly used to reveal growth dynamics of regional shrub vegetation and its sensitivity to climate change. Up to now, nearly 70 species of shrubs have been used in the studies of shrub dendrochronology, which considerably broadened the traditional tree-ring research network, enriched the research scope and object of dendrochronology, and certainly with great significance in revealing the characteristics of regional climate fluctuation and annual dynamics of structure, function and service for shrubland ecosystems. In this study, we systematically collected dendrochronological studies based on shrub species during the 1996-2021, and reviewed research progress in four main subfields (physiology, climatology, ecology and hydrology) in dendrochronology for shrub species. The characteristics of shrub growth and xylem anatomy under different environmental stresses were expounded. The main limiting factors for shrub growth in different climatic conditions and the history of regional climate fluctuations based on shrub-ring data were revealed. The individual growth and population dynamics of shrub species driven by climate and the changes in ecosystems caused by non-climatic factors were assessed, and the reconstructions of regional hydrological histories were compiled using tree-ring data of shrub species. Under the context of global warming, dendrochronological studies of shrub species in China should pay more attention to the responses of shrub species radial growth to drought stress under different moisture conditions in the semi-arid and arid regions and the transforming feature of distribution pattern and climate response sensitivity for shrub species under the background of climate change.

Key words: shrub ring, anatomy of xylem, climate change, ecological response, hydrologic response

刘杰, 董彦君, 李宗善. 灌木年轮生态学研究进展[J]. 应用生态学报, 2022, 33(6): 1699-1708.

LIU Jie, DONG Yan-jun, LI Zong-shan. Research advances in shrub dendroecology[J]. Chinese Journal of Applied Ecology, 2022, 33(6): 1699-1708.

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