Required sample size for estimating soil respiration rates in large areas of two tropical forests and of two types of plantation in Malaysia
Required sample size for estimating soil respiration rates in large areas of two tropical forests and of two types of plantation in Malaysia
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DOI：
10.1016/j.foreco.2005.02.011
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发表时间：
2005-05-16
影响因子：
3.7
通讯作者：
Koizumi, H
中科院分区：
文献类型：
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作者：
Adachi, M;Bekku, YS;Koizumi, H
我们估计了估计马来西亚四个生态系统（原始林和次生林、油棕和橡胶种植园）大规模土壤呼吸（面积为1至2公顷）所需的样本量。原始森林土壤呼吸速率为769 +/- 329 mg CO2 m（-2）h（-1（2公顷，50个采样点），次生林中708 +/- 300 mg CO2 m（-2）h（-1（2公顷，50个点），油棕种植园（1公顷，25个点）为815 +/- 363 mg CO2 m（-2）h（-1），橡胶种植园（1公顷，25个点）为450 +/- 178 mg CO2 m（-2）h（-1）。根据我们的样本量分析，在95%的概率水平下，确定每个站点的平均土壤呼吸速率所需的测量点数量在67到85之间，平均误差不超过10%。这些结果表明，在热带地区的土壤呼吸速率的空间异质性评估可能需要更多的测量点比温带森林。(c)2005 Elsevier B. V.保留所有权利。
We estimated the required sample sizes for estimating large-scale soil respiration (for areas from 1 to 2 ha) in four ecosystems (primary and secondary forests, and oil palm and rubber plantations) in Malaysia. The soil respiration rates were 769 +/- 329 mg CO2 m(-2) h(-1) in the primary forest (2 ha, 50 sample points), 708 +/- 300 mg CO2 m(-2) h(-1) in the secondary forest (2 ha, 50 points), 815 +/- 363 mg CO2 m(-2) h(-1) in the oil palm plantation (1 ha, 25 points), and 450 +/- 178 mg CO2 m(-2) h(-1) in the rubber plantation (1 ha, 25 points). According to our sample size analysis, the number of measurement points required to determine the mean soil respiration rate at each site with an error in the mean of no more than 10% ranged from 67 to 85 at the 95% probability level. These results suggest that evaluating the spatial heterogeneity of soil respiration rates in the tropics may require more measurement points than in temperate forests. (c) 2005 Elsevier B.V. All rights reserved.