Contribution of fungal spores to particulate matter in a tropical rainforest
Contribution of fungal spores to particulate matter in a tropical rainforest
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DOI：
10.1088/1748-9326/5/2/024010
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发表时间：
2010-06
影响因子：
6.7
通讯作者：
Ting Zhang;G. Engling;C. Chan;Yi-Nan Zhang;Zhisheng Zhang;Mang Lin;X. Sang;Y.-D. Li;Y. Li
中科院分区：
文献类型：
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作者：
Ting Zhang;G. Engling;C. Chan;Yi-Nan Zhang;Zhisheng Zhang;Mang Lin;X. Sang;Y.-D. Li;Y. Li
最近提出的多元醇阿拉伯糖醇和甘露醇作为真菌孢子的源示踪剂，在这项研究中被用来估计真菌对大气气溶胶的贡献。采用高效阴离子交换色谱脉冲安培检测器（HPAEC-PAD）对海南岛热带雨林尖峰岭春季大气颗粒物（PM2. 5和PM10）中的阿拉伯糖醇和甘露醇进行了分析。阿糖醇和甘露醇的平均浓度值较高，在PM2.5中的平均值分别为7.0和16.0 ng m − 3，在PM10中的平均值分别为44.0和71.0 ng m − 3。这两种示踪剂之间的相关性很好，特别是在粗模式气溶胶（PM2.5 − 10）中，表明它们主要与粗气溶胶颗粒相关，并且有共同的来源。PM10中阿拉伯糖醇和甘露醇与相对湿度呈显著正相关，与平均温度呈显著正相关，表明生物气溶胶以真菌孢子形式的湿排放机制。我们估计真菌孢子对环境PM质量和有机碳的贡献，根据观察到的这两种示踪剂的环境浓度。真菌孢子对PM10质量的相对贡献率为1.6 ~ 18.2%，平均值为7.9%，真菌孢子对PM10中有机碳的贡献率为4.64 ~ 26.1%，平均值为12.1%，表明生物过程是大气气溶胶的重要来源。
The polyols arabitol and mannitol, recently proposed as source tracers for fungal spores, were used in this study to estimate fungal contributions to atmospheric aerosol. Airborne particulate matter (PM2.5 and PM10) was collected at Jianfengling Mountain, a tropical rainforest on Hainan Island situated off the south China coast, during spring and analyzed for arabitol and mannitol by high-performance anion exchange chromatography with pulsed amperometric detection (HPAEC-PAD). The average concentrations of arabitol and mannitol exhibited high values with averages of 7.0 and 16.0 ng m − 3 respectively in PM2.5 and 44.0 and 71.0 ng m − 3 in PM10. The two tracers correlated well with each other, especially in the coarse mode aerosol (PM2.5 − 10), indicating they were mainly associated with coarse aerosol particles and had common sources. Arabitol and mannitol in PM10 showed significant positive correlations with relative humidity, as well as positive correlations with average temperature, suggesting a wet emissions mechanism of biogenic aerosol in the form of fungal spores. We made estimations of the contribution of fungal spores to ambient PM mass and to organic carbon, based on the observed ambient concentrations of these two tracers. The relative contributions of fungal spores to the PM10 mass were estimated to range from 1.6 to 18.2%, with a rather high mean value of 7.9%, and the contribution of fungal spores to organic carbon in PM10 ranged from 4.64 to 26.1%, with a mean value of 12.1%, implying that biological processes are important sources of atmospheric aerosol.