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神农架大九湖泥炭地溶解有机碳季节性变化及其影响因素

张志麒 张一鸣 黄咸雨 杜华 莫家勇 屈万国 皮婷

张志麒, 张一鸣, 黄咸雨, 杜华, 莫家勇, 屈万国, 皮婷. 神农架大九湖泥炭地溶解有机碳季节性变化及其影响因素[J]. 地质科技通报, 2021, 40(2): 147-155. doi: 10.19509/j.cnki.dzkq.2021.0213
引用本文: 张志麒, 张一鸣, 黄咸雨, 杜华, 莫家勇, 屈万国, 皮婷. 神农架大九湖泥炭地溶解有机碳季节性变化及其影响因素[J]. 地质科技通报, 2021, 40(2): 147-155. doi: 10.19509/j.cnki.dzkq.2021.0213
Zhang Zhiqi, Zhang Yiming, Huang Xianyu, Du Hua, Mo Jiayong, Qu Wanguo, Pi Ting. Seasonal variations and influencing factors of dissolved organic carbon in pore water from the Dajiuhu peatland in Shennongjia[J]. Bulletin of Geological Science and Technology, 2021, 40(2): 147-155. doi: 10.19509/j.cnki.dzkq.2021.0213
Citation: Zhang Zhiqi, Zhang Yiming, Huang Xianyu, Du Hua, Mo Jiayong, Qu Wanguo, Pi Ting. Seasonal variations and influencing factors of dissolved organic carbon in pore water from the Dajiuhu peatland in Shennongjia[J]. Bulletin of Geological Science and Technology, 2021, 40(2): 147-155. doi: 10.19509/j.cnki.dzkq.2021.0213

神农架大九湖泥炭地溶解有机碳季节性变化及其影响因素

doi: 10.19509/j.cnki.dzkq.2021.0213
基金项目: 

国家自然科学基金项目 41877317

中国地质大学(武汉)生物地质与环境地质国家重点实验室自主课题 GBL11612

详细信息
    作者简介:

    张志麒(1985—),男,硕士,主要从事泥炭湿地生态学的研究工作。E-mail: 70574284@qq.com

    通讯作者:

    黄咸雨(1981—),男,教授,博士生导师,主要从事泥炭沉积与全球变化研究。E-mail:xyhuang@cug.edu.cn

  • 中图分类号: X132

Seasonal variations and influencing factors of dissolved organic carbon in pore water from the Dajiuhu peatland in Shennongjia

  • 摘要: 亚热带泥炭地在水源涵养、碳储存和生物多样性等方面有着重要的保护价值。溶解有机碳(DOC)是泥炭地中容易受到外界扰动的一部分碳,在气候变化和人类活动的双重影响下,DOC可能通过降解或横向迁移从泥炭地中流失,潜在地威胁了泥炭地的碳储存功能。然而,目前对于亚热带泥炭地DOC如何响应季节性尺度的环境变化还缺乏深入的认识。以位于北亚热带的神农架大九湖泥炭地为研究对象,开展了季节尺度的泥炭孔隙水DOC浓度和紫外-可见吸收光谱特征以及环境参数的监测。结果显示,在大九湖泥炭地中,表层0~10 cm的泥炭孔隙水DOC浓度和光谱参数具有明显的季节差异性,DOC浓度和光谱参数还表现出明显的深度差异性。相关性分析显示,DOC浓度及紫外-可见吸收光谱参数直接受控于泥炭孔隙水的电导率和氨态氮浓度,可能还间接受到泥炭地水位和孔隙水硝态氮浓度等因素的影响。以上结果表明,在亚热带季风气候条件下,季节性水位波动引起的泥炭水化学参数和营养盐的变化,可能显著改变表层泥炭DOC动态,需要重视这种季节性波动对亚热带泥炭地碳储存能力以及生态功能的影响。

     

  • 图 1  神农架大九湖盆地地图(a)和采样点分布图(b)

    Figure 1.  Maps of Dajiuhu Basin (a) and the sampling sites (b)

    图 2  2016年大九湖监测数据日均变化

    Figure 2.  Daily variations of monitoring data in 2016

    图 3  大九湖泥炭不同深度孔隙水水化学参数季节变化

    Figure 3.  Seasonal variations of porewater chemistry parameters in peat pore water collected from the Dajiuhu peatland

    图 4  大九湖泥炭不同深度孔隙水营养盐浓度季节变化

    Figure 4.  Seasonal variations of nutrient concentration of peat pore water at different depth in the Dajiuhu peatland

    图 5  大九湖泥炭不同深度孔隙水DOC质量浓度(a)及UV-Vis参数(b~d)季节变化

    Figure 5.  Seasonal variations of DOC concentration (a) and UV-Vis ratios (b~d) in peat pore water collected from the Dajiuhu peatland

    图 6  2016年大九湖泥炭孔隙水DOC与环境参数PCA分析

    Figure 6.  PCA analysis of environmental parameters and DOC indices in the peat pore water collected from different peat depths during 2016

    表  1  泥炭孔隙水DOC质量浓度和E2/E3比值与环境参数相关性

    Table  1.   Correlation results among DOC concentration, E2/E3 parameters and environmental factors

    DOC α254 E2/E3 SUVA254 pH ORP Cond Fe2+ NH3-N NO3-N Temp RH
    α254 0.96**
    E2/E3 -0.66** -0.62**
    SUVA254 -0.24 -0.10 0.14
    pH -0.01 -0.09 0.20 0.16
    ORP -0.32 -0.30 0.21 -0.08 -0.20
    Cond 0.50** 0.38* -0.48** -0.33 0.41* -0.06
    Fe2+ 0.20 0.19 -0.14 -0.08 -0.13 -0.36 0.06
    NH3-N 0.46** 0.44** -0.43** -0.02 -0.10 -0.84** 0.03 0.55**
    NO3-N -0.19 -0.12 -0.06 0.17 -0.14 -0.55** -0.40* -0.10 0.33
    Temp -0.19 -0.16 0.09 0.07 -0.22 0.92** -0.06 -0.12 -0.62** -0.51**
    RH 0.23 0.23 -0.26 -0.27 -0.22 -0.82** -0.01 0.14 0.50** 0.28 -0.78**
    DWT -0.29 -0.25 0.06 0.01 -0.14 0.86** 0.03 -0.42* -0.86** -0.26 0.73** -0.51**
    注:**p < 0.01; *p < 0.05;ORP.氧化还原电位;Cond.电导率;Temp.气温;RH.相对湿度;DWT.沼泽水位埋深
    下载: 导出CSV
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