globalchange  > 气候变化事实与影响
CSCD记录号: CSCD:6511627
论文题名:
干扰对树线生态过程的影响研究进展
其他题名: Research advances in disturbance and ecological processes of the treeline ecotone
作者: 王亚锋1; 梁尔源2
刊名: 科学通报
ISSN: 0023-074X
出版年: 2019
卷: 64, 期:16, 页码:1711-1721
语种: 中文
中文关键词: 树线 ; 干扰 ; 树轮生态学 ; 气候变化 ; 青藏高原
英文关键词: treeline ; disturbance ; dendroecology ; climate change ; Tibetan Plateau
WOS学科分类: AUTOMATION CONTROL SYSTEMS
WOS研究方向: Automation & Control Systems
中文摘要: 作为重要的非气候因子之一,干扰与树线之间的关系已成为干扰生态学研究的重要内容之一,开展受干扰树线研究对于实施山区生态保护或修复具有重要意义.当前,关于干扰如何调控树线对气候变化的响应仍缺乏系统的研究.为此,本研究梳理了气候变化背景下多种干扰因子对树线生态过程的影响.已有的树线研究中涉及的自然干扰主要包括:火山喷发、冰川进退、野火、雪崩、生物活动、极端低温、强风等;人为干扰包括:森林砍伐、放牧、人为用火、开矿、农耕、药草采集、旅游等.在多数情况下,由于在强度、频率、持续时间上的差异,不同干扰因子对树线生态过程具有不同的效应.在干扰迹地上,根据土壤生境状况,树线变化将经历由多种环境因素驱动的原生或次生演替过程以及由气候驱动的林分变化两个主要阶段.当前研究中缺少对常见干扰因子的连续观测资料,且未能很好地区分干扰历史和气候变化对树线生态过程影响的相对贡献.相关研究需同时关注干扰因子对树线的破坏性和增益性影响,尤其加强后者研究可避免对树线干扰因子的片面认识.今后亟待开展干扰状况下的树线模拟研究.基于多种研究手段,围绕关键生态过程,针对树线人为干扰因子进行长期跟踪调查是值得尝试的研究思路.值得提出的是,青藏高原既拥有北半球最高海拔的天然树线,也分布着不同类型的受干扰树线,是开展天然树线与受干扰树线对比研究的理想区域.
英文摘要: The treeline ecotone refers to the transition from the timberline to treeless alpine vegetation. As either the upper-elevation or northernmost limit of erect trees, treeline will be sensitive to environmental change. An increasing number studies have focused on influence of climatic change on treeline dynamics. Treeline shift rate is also considered to be a fingerprint of influence of global change on terrestrial ecosystems. However, less is known about how disturbance, as an important non-climatic factor, mediates the response of treelines to climate change. Such studies can provide useful information to guide implementation of key ecological protection and rehabilitation measures in these comparatively cold biomes. Herein, we review research progress relating to impacts of different disturbances on ecological processes on the treeline ecotone. Based on the Web of Science and CNKI database, only a modest 10.8% of 1002 treeline-related publications from 1950 to 2018 focused on disturbance. Disturbances include natural and human-caused categories according to their causes. Natural disturbances mainly include volcanic eruptions, glacier fluctuations, wildfire, snow avalanche, biological activities, extreme low temperature, and strong wind. Human-caused disturbances mainly include deforestation, grazing, human-caused fire, mining, farming, medicinal plant collecting and tourism. In most cases, due to differences in intensity, frequency and time duration, different disturbances could have different effects on the ecological processes of the treeline ecotone. Under some circumstances, the impacts of natural and human-caused disturbances on treelines may not differ significantly. For example, natural wildfires and human-caused fires, as well as wildlife activities and livestock grazing, may contribute similar forcing in driving treeline dynamics. In disturbed areas, based on soil habitat regimes, treeline changes would follow two main stages, i.e., primary succession or secondary succession processes driven by multiple environmental factors and climate-driven stand changes. Observational data for the common disturbance influences (e.g. fire and grazing) were rare in recent studies, failing to distinguish relative effects of disturbances and climate change on ecological processes in the treeline ecotone.
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/157843
Appears in Collections:气候变化事实与影响

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作者单位: 1.南京林业大学生物与环境学院, 南京, 江苏 210037, 中国
2.中国科学院青藏高原研究所
3.中国科学院青藏高原地球科学卓越创新中心, 中国科学院高寒生态重点实验室
4.中国科学院青藏高原地球科学卓越创新中心,
5., 北京
6.北京 100101
7.100101, 中国

Recommended Citation:
王亚锋,梁尔源. 干扰对树线生态过程的影响研究进展[J]. 科学通报,2019-01-01,64(16):1711-1721
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