气候和干扰对东南沿海地区落叶松树环的影响

IF 2.7 3区 农林科学 Q1 FORESTRY
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引用次数: 0

摘要

东北亚广大地区覆盖着针阔混交原始森林,其中包括一系列不同的树种。影响这些生态系统动态的一个关键因素是风的干扰。据报道,由于热带气旋向极地迁移,这一因素将变得越来越重要,而热带气旋的一个特点就是风力强劲。同时,全球气候变化可能会降低一些物种的恢复能力,并导致新的物种组合。格梅林落叶松是该地区北部重要的早期演替物种之一。在其分布区的东南部(俄罗斯远东地区),树木气候学家尚未对该物种进行广泛研究,也没有树木生态学方面的研究。这项研究显示了 Larix gmelinii 的季节性生长如何应对气候变化,特别是降水量和温度的变化。研究证实,只要不缺水,这些树木受气温上升的影响比受持续降水量的影响更大。有趣的是,20 世纪 70 年代后,6 月份(相关性最强的月份)的 Larix gmelinii 对气候的敏感性发生了变化。它从与温度的负相关变成了与降水的正相关。通过使用树环数据,我们能够重建过去的森林干扰史。该年表中的峰值与早先发表的其他物种树生态重建中的峰值相吻合。它们表明落叶松的径向生长对树冠变化很敏感。我们记录了 20 世纪 60 年代和 2000 年代气象观测期间的两个释放峰值。我们将第一个峰值归因于最强的热带气旋艾玛(1956 年)。我们还认为,第二个峰值也反映了该地区近期热带气旋的加强。我们认为,干扰导致的小气候变化改变了与气候的关系,干扰可能导致树木生长依赖降水。同时,这种低相关性并不支持当前气候对树木产生强烈负面影响的结论。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Climatic and disturbances influence on tree-rings of Larix gmelinii in the southeast coastal area
The vast region of North East Asia is covered by primary mixed conifer-broadleaved forests which include a range of different tree species. A key factor in the dynamics of these ecosystems is wind disturbance. According to reports, this factor will be increasingly important as a result of the poleward migration of tropical cyclones, a characteristic of which is strong wind. At the same time, global climate change may reduce the recovery potency of some species and lead to new combinations of species. Gmelin Larch is one of the key early succession species in the north of the region. In the southeastern part of its range (Russian Far East), this species has not been widely studied by dendroclimatologists and there are no dendroecological studies available. This study shows how the seasonal growth of Larix gmelinii responds to changes in climate, specifically to variations in precipitation and temperature. The study has established that these trees are more affected by rising temperatures than by consistent precipitation levels, provided there is no shortage of water. Interestingly, after the 1970s there was a change in the climate sensitivity of Larix gmelinii in June (the month with the strongest correlation). It went from a negative correlation with temperature to a positive correlation with precipitation. By using tree ring data, we were able to reconstruct the past history of forest disturbance. The peaks in this chronology coincide with those in earlier published dendroecological reconstructions for other species. They indicate that the radial growth of larch is sensitive to canopy changes. We recorded two release peaks in the 1960s and 2000s, during the period of meteorological observations. We attributed the first peak to the most powerful tropical cyclone Emma (1956). We assume also that the second peak reflects the recent intensification of tropical cyclones in the region. In our opinion, the change in microclimate as a result of disturbance has altered the relationship to climate in such a way that disturbance may cause tree growth to be dependent on precipitation. At the same time, such low correlations do not support a conclusion about the strong negative influence of the current climate on the trees.
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来源期刊
Dendrochronologia
Dendrochronologia FORESTRY-GEOGRAPHY, PHYSICAL
CiteScore
5.50
自引率
13.30%
发文量
82
审稿时长
22.8 weeks
期刊介绍: Dendrochronologia is a peer-reviewed international scholarly journal that presents high-quality research related to growth rings of woody plants, i.e., trees and shrubs, and the application of tree-ring studies. The areas covered by the journal include, but are not limited to: Archaeology Botany Climatology Ecology Forestry Geology Hydrology Original research articles, reviews, communications, technical notes and personal notes are considered for publication.
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