Soil Respiration May Overestimate or Underestimate in Forest Ecosystems

文献类型： 外文期刊

第一作者： Cao, Yuanbo

作者： Cao, Yuanbo;Wu, Honghui;Yang, Yadong;Xiao, Huijie;Wang, Baitian;Zhang, Yunlong;Wang, Xijing;Wei, Tingting

作者机构：

关键词： soil respiration rate in forest ecosystem; spatial and temporal heterogeneity; measurement points and measurement times; soil respiration accuracy

期刊名称：SUSTAINABILITY （ 影响因子：2.576； 五年影响因子：2.798 ）

ISSN：

年卷期： 2021 年 13 卷 5 期

页码：

收录情况： SCI

摘要： The inappropriate selection of measurement points and measurement times in an ecosystem may easily lead to the underestimation or overestimation of soil respiration due to spatial and temporal heterogeneity. To assess the law of spatial and temporal heterogeneity and more accurately determine the soil respiration rate, we measured the soil respiration rate of a forest in the plant growing season from 2011 to 2013 on Changbai Mountain in 8 directions and 7 distances from each tree trunk. Neglecting the direction of the measuring point may overestimate or underestimate the soil respiration rate by 29.81% and 26.09%, respectively; neglecting the distance may overestimate or underestimate the soil respiration rate by 41.36% and 20.28%, respectively; and ignoring the measurement time may overestimate and underestimate the soil respiration rate by 41.71% and 57.64%, respectively. In addition, choosing a measurement point in the eastern direction at a 1.8 m distance and conducting the measurement in September may relatively accurately reflect the soil respiration rate of the ecosystem. These findings can deepen our understanding of soil respiration rate heterogeneity and may provide new ideas for improving the measurement method of soil respiration.

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