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潮沟形态对潮滩湿地土壤有机碳空间分布的影响

葛嘉欣,  崔步礼,  王晓杰,  谢宝华,  赵明亮,  于冬雪,  于洋,  宋维民,  马海青,  张孝帅,  韩广轩

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文章导航 > 环境工程  > 2023 >  41(6): 23-31
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引用本文: 葛嘉欣, 崔步礼, 王晓杰, 谢宝华, 赵明亮, 于冬雪, 于洋, 宋维民, 马海青, 张孝帅, 韩广轩. 潮沟形态对潮滩湿地土壤有机碳空间分布的影响[J]. 环境工程, 2023, 41(6): 23-31. doi: 10.13205/j.hjgc.202306004
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Citation: GE Jiaxin, CUI Buli, WANG Xiaojie, XIE Baohua, ZHAO Mingliang, YU Dongxue, YU Yang, SONG Weimin, MA Haiqing, ZHANG Xiaoshuai, HAN Guangxuan. EFFECTS OF TIDAL CREEK MORPHOLOGY ON SPATIAL DISTRIBUTION OF SOIL ORGANIC CARBON IN SOIL IN TIDAL WETLAND[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(6): 23-31. doi: 10.13205/j.hjgc.202306004
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潮沟形态对潮滩湿地土壤有机碳空间分布的影响

doi: 10.13205/j.hjgc.202306004

  • 1. 鲁东大学 资源与环境工程学院, 山东 烟台 264003;

  • 2. 中国科学院烟台海岸带研究所中国科学院海岸带环境过程与生态修复重点实验室, 山东 烟台 264003;

  • 3. 中国科学院黄河三角洲滨海湿地生态系统野外科学观测研究站, 山东 东营 257500;

  • 4. 河海大学 水文水资源学院, 南京 210098

基金项目: 

国家自然科学基金"黄河口盐沼湿地固碳关键过程、调控机理及增汇潜力研究"（U2106209）；国家自然科学基金"黄河河口水文-地貌-生态系统不平衡演变机理与多维调控"（U2243207）

详细信息
    作者简介:

    葛嘉欣(1998-),女,硕士,主要研究方向为滨海生态与环境。1677261079@qq.com

    通讯作者:

    韩广轩(1978-),男,研究员,主要研究方向为滨海湿地生态学。gxhan@yic.ac.cn

EFFECTS OF TIDAL CREEK MORPHOLOGY ON SPATIAL DISTRIBUTION OF SOIL ORGANIC CARBON IN SOIL IN TIDAL WETLAND

  • 1. School of Resources and Environmental Engineering, Ludong University, Yantai 264003, China;

  • 2. Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China;

  • 3. Yellow River Delta Field Observation and Research Station of Coastal Wetland Ecosystem, Chinese Academy of Science, Dongying 257500, China;

  • 4. College of Hydrology and Water Resources, Hohai University, Nanjing 210098, China

摘要

    摘要
  • 摘要: 土壤有机碳是潮滩湿地生态系统的主要碳库。以1条典型天然潮沟为研究对象，通过划分潮沟发育等级并计算潮沟形态特征指数，分析潮沟形态特征空间分布特点；运用地统计学方法探究潮滩湿地土壤有机碳空间分布特点，及潮沟形态特征对土壤有机碳空间分布的影响。结果表明：潮沟形态特征具有明显的空间异质性特点，潮沟在中潮滩比较发育，其密度、曲率与分汊率均大于低潮滩和高潮滩；潮沟长度随着潮沟发育等级的增加而逐渐增加，而潮沟曲率随着潮沟发育等级的增加而逐渐减小。空间插值结果显示：0~10 cm土壤有机碳含量最低值出现在潮沟较发育的中潮滩，10~20 cm土壤有机碳含量呈由海向陆逐渐增加的趋势，并呈条带状的空间分布特点。在低潮滩，三级潮沟土壤有机碳平均值显著大于一级潮沟；在中潮滩，二级潮沟土壤有机碳平均值显著大于三级潮沟和一级潮沟；高潮滩土壤有机碳含量与潮沟发育等级无显著相关性。随着潮沟侧向距离的增加，0~10 cm土壤有机碳含量在低潮滩与中潮滩逐渐增加；而中潮滩10~20 cm土壤有机碳含量随着潮沟侧向距离的增加而逐渐减少；高潮滩土壤有机碳含量与潮沟侧向距离无显著相关性。潮沟形态空间分布异质性是导致潮滩湿地土壤有机碳含量空间分布差异的重要原因。因此，潮滩湿地土壤碳库的精确估算需要关注潮沟形态的影响。
    Abstract: Soil organic carbon is a major carbon pool in tidal wetland ecosystems. By dividing the level of the tidal creek and calculating its morphological characteristic index, the spatial distribution characteristics of the typical tidal creek system were analyzed, taking a typical natural tidal channel as the research object. The spatial distribution characteristics of soil organic carbon were analyzed by geostatistical methods. In addition, the effects of morphological characteristics of the tidal creek on the spatial distribution of soil organic carbon were explored. The results showed that there was obvious spatial heterogeneity in the morphological characteristics of the tidal creek. In the middle tidal flats, the connectivity of the tidal creek network was higher, and the density, curvature and bifurcation ratio were also higher than that in other tidal zones. The tidal creek length gradually increased with the increase of tidal creek development grade, while the tidal creek curvature gradually decreased with the increase of tidal creek development grade. The spatial interpolation results showed that the lowest soil organic carbon in 0 to 10 cm soil layer occurred in the middle tidal flats where tidal creeks were more developed, and within the 10~20 cm soil layer, soil organic carbon showed a gradually increasing trend from sea to land, and showed a strip-shaped spatial distribution choracteristic. In the low tidal flats, the mean value of soil organic carbon in a third-order creek was significantly greater than that in a first-order creek. In the middle tidal flats, the mean value of soil organic carbon in a second-order creek was significantly greater than that in a third-order and a first-order creek. The soil organic carbon of the high tide flats was not significantly correlated with the tide creek development level. Within the 0 to 10 cm soil layer, the soil organic carbon gradually increased with increasing distance to the tidal creek in low and middle tidal flats. Within the 10 to 20 cm soil layer, the soil organic carbon gradually decreased with increasing distance to tidal creek in the middle tidal flats. However, there was no correlation between the soil organic carbon and the distance to the tidal creek in high tidal flats. The spatial heterogeneity in the morphological characteristics of the tidal creek was one of the important factors of spatial differences in soil organic carbon content in the tidal wetland. Therefore, morphology changes in tidal creeks should be considered in order to accurately estimate the soil carbon pools in tidal wetlands.
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