Annual variation in soil respiration and its component parts in two structurally contrasting woody savannas in Central Brazil
Annual variation in soil respiration and its component parts in two structurally contrasting woody savannas in Central Brazil
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DOI：
10.1007/s11104-011-0984-7
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发表时间：
2012-03-01
期刊：
影响因子：
4.9
通讯作者：
Grace, John
中科院分区：
文献类型：
--
作者：
Butler, Andre;Meir, Patrick;Grace, John
背景与目的由于土壤二氧化碳外流的高度时空变化，陆地碳收支依赖于对不同生态系统和气候带土壤呼吸驱动因素的详细了解。本研究旨在评价森林生态系统中植被结构和气候对土壤CO2排放的独立影响。方法研究了巴西中部两个相邻和结构相反的木本植物稀树草原土壤CO2排放的季节和日变化，包括自养和异养成分。基本结果发现，两种林分的年土壤CO2排放没有显著差异(p=0.53)，尽管两者的LAI存在明显差异(p<0.05)。
Background and aims Due to the high spatial and temporal variation in soil CO2 efflux, terrestrial carbon budgets rely on a detailed understanding of the drivers of soil respiration from a diverse range of ecosystems and climate zones. In this study we aim to evaluate the independent influence of vegetation structure and climate on soil CO2 efflux within cerrado ecosystems.Methods We examine the seasonal and diel variation of soil CO2 efflux, including its autotrophic and heterotrophic components, within two adjacent and structurally contrasting woody savannas in central Brazil.Principle results We found no significant difference in the annual soil CO2 efflux between the two stands (p=0.53) despite a clear disparity in both LAI (p