Contribution of soil fauna respiration to CO2 flux in subtropical Moso bamboo (Phyllostachys pubescens) forests: a comparison of different soil treatment methods

文献类型： 外文期刊

第一作者： Jiang, Yan

作者： Jiang, Yan;Wang, Bing;Niu, Xiang;Dong, Zhixin;Wang, Peng

作者机构：

关键词： Soil fauna;Soil fauna respiration;Electric steel bars;Naphthalene;In field conditions

期刊名称：ENVIRONMENTAL EARTH SCIENCES （ 影响因子：2.784； 五年影响因子：2.867 ）

ISSN： 1866-6280

年卷期： 2016 年 75 卷 13 期

页码：

收录情况： SCI

摘要： Soil fauna is an essential community in forest ecosystems; yet, the role of these organisms in soil total CO2 emission is still unclear, partly because of the lack of effective measurement methods, especially in field situ conditions. This study investigated the soil fauna community in Moso bamboo (Phyllostachys pubescens) stands in subtropical China, the faunal contribution to soil total respiration, and the effects of different methods for repelling soil fauna. Three methods to repel soil fauna were tested, including naphthalene application (NT sites), electric steel bars (SET sites), and the combination of naphthalene and electric steel bars (NET sites). Control sites (NTC sites) had no treatment. The results showed that naphthalene, electric steel bars, and a combination of naphthalene and electric steel bars all are powerful in excluding soil fauna individual numbers (INs) (F = 48.65, P < 0.05), but none of them could change the numbers and the composition of soil fauna groups significantly (S = 0.889-1.00 and W = 0.833-0.960). The mean soil fauna respiration was measured at approximately 0.178 mu mol m(2) s(-1); the mean faunal contribution to soil total respiration was 4.02 % at SET sites, 4.11 % at NT sites, and 5.51 % at NET sites; and the mean-reduced fauna numbers were 71.46, 79.13 and 84.84 %, with the mean soil CO2 flux losses (MRL) increased. Mean soil respiration losses (MRLs) were significantly related to H' (R-2 = 0.838, P < 0.004) and IN (R-2 = 0.810, P < 0.004) in SET, NT, and NET. The results suggested that the method of the combined naphthalene and the electric steel bars were shown to be reliable for the exclusion of soil fauna and the estimation of soil fauna respiration in field measurement.

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