夏季高寒地衣荒原和灌木植被土壤温度变化的驱动因素

IF 1.6 4区 地球科学 Q4 ENVIRONMENTAL SCIENCES
Peter Aartsma, A. Odland, S. Reinhardt, H. Renssen
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引用次数: 0

摘要

在高山和北极地区,由于与灌木的竞争加剧,地衣荒原的丰度正在减少。植被的这种变化可能对土壤温度产生重要影响。本研究的目的是找出地衣荒原和灌木下土壤温度变化的驱动因素。此外,我们希望对地衣荒原下土壤温度的变化有更深入的了解。2019年7月和8月,我们测量了挪威南部高山地区30个地衣样地和15个灌木样地的土壤温度。采用不同的处理方法,研究了地衣荒原和灌木植被土壤温度变化的驱动因素。地衣荒原土壤温度比灌木荒原土壤温度高1.45℃。此外,我们还测量到地衣荒原南北向土壤温度的差异为1.66°C,这有助于地衣荒原下土壤温度的小尺度空间变异。结果表明,由于灌木下凋落物层的缓冲能力和灌木冠层对土壤的遮荫作用,夏季灌木下土壤温度低于地衣石南。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Drivers of soil temperature variation in alpine lichen heaths and shrub vegetation during the summer
Lichen heaths are decreasing in abundance in alpine and Arctic areas because of an increased competition with shrubs. This shift in vegetation might have important consequences for the soil temperature. The aim of this study is to find the drivers of the variation in soil temperature below lichen heaths and shrubs. Moreover, we want to gain more insight in the variability of the soil temperature below lichen heaths. We measured the soil temperature in thirty lichen plots and fifteen shrub plots in an alpine area in southern Norway during July and August 2019. We applied several treatments to study the drivers behind the variation in soil temperature between lichen heaths and shrub vegetation. We found that the average soil temperature was 1.45°C higher below lichen heaths than below shrub vegetation. Moreover, we measured a difference in soil temperature of 1.66°C between north-and south-facing lichen heaths, which contributes to the small-scale spatial variability in soil temperature below lichen heaths. Based on our experiments, we conclude that the buffering capacity of the litter layer below shrubs and shading of the soil by the shrub canopy lead to a lower soil temperature below shrubs compared to lichen heaths during the summer.
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来源期刊
CiteScore
3.00
自引率
5.00%
发文量
37
审稿时长
7 months
期刊介绍: The mission of Arctic, Antarctic, and Alpine Research (AAAR) is to advance understanding of cold region environments by publishing original scientific research from past, present and future high-latitude and mountain regions. Rapid environmental change occurring in cold regions today highlights the global importance of this research. AAAR publishes peer-reviewed interdisciplinary papers including original research papers, short communications and review articles. Many of these papers synthesize a variety of disciplines including ecology, climatology, geomorphology, glaciology, hydrology, paleoceanography, biogeochemistry, and social science. Papers may be uni- or multidisciplinary but should have interdisciplinary appeal. Special thematic issues and proceedings are encouraged. The journal receives contributions from a diverse group of international authors from academia, government agencies, and land managers. In addition the journal publishes opinion pieces, book reviews and in memoria. AAAR is associated with the Institute of Arctic and Alpine Research (INSTAAR) the oldest active research institute at the University of Colorado Boulder.
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