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应用生态学报 ›› 2026, Vol. 37 ›› Issue (9): 3159-3168.doi: 10.13287/j.1001-9332.202609.056

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大闸蟹围网养殖对阳澄湖湿地CO2和CH4排放的影响

沈心妍1, 郭冉1, 张雨乐1, 赵嘉雯1, 顾茜1, 王睿楠1, 刘敏2, 胡敏杰3, 孙东耀1,2,4,5*   

  1. 1苏州科技大学地理科学与测绘工程学院, 江苏苏州 215009;
    2华东师范大学地理科学学院, 上海 200241;
    3福建师范大学地理科学学院, 福州 350007;
    4苏州市空间信息智能技术与应用重点实验室, 江苏苏州 215009;
    5城市智能遥感与古城数智化技术江苏省产业技术工程化中心, 江苏苏州 215009
  • 收稿日期:2026-07-21 接受日期:2026-08-14 出版日期:2026-09-18 发布日期:2026-10-12
  • 通讯作者: *E-mail: dongyaos@usts.edu.cn
  • 作者简介:沈心妍, 女, 2005年生, 本科生。主要从事水体碳氮循环过程研究。E-mail: 3113840874@qq.com
  • 基金资助:
    国家自然科学基金项目(42301088)、湖泊与流域水安全国家重点实验室开放课题(2024SKL015)、华东师范大学地理信息科学教育部重点实验室开放基金项目(KLGIS2023A04)、福建省自然科学基金杰出青年项目(2026J010036)和福建省产学合作项目(2025Y4006)

Effects of enclosure aquaculture of hairy crab on CO2 and CH4 emission in Yangcheng Lake wetland.

SHEN Xinyan1, GUO Ran1, ZHANG Yule1, ZHAO Jiawen1, GU Xi1, WANG Ruinan1, LIU Min2, HU Minjie3, SUN Dongyao1,2,4,5*   

  1. 1School of Geography Science and Surveying Engineering, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu, China;
    2School of Geography Sciences, East China Normal University, Shanghai 200241, China;
    3School of Geographical Science, Fujian Normal University, Fuzhou 350007, China;
    4Suzhou Key Laboratory of Spatial Information Intelligent Technology and Application, Suzhou 215009, Jiangsu, China;
    5Jiangsu Provincial Engineering Center for Industrial Technology of Urban Intelligent Remote Sensing and Ancient City Digital Intelligence, Suzhou 215009, Jiangsu, China
  • Received:2026-07-21 Accepted:2026-08-14 Online:2026-09-18 Published:2026-10-12

摘要: 大闸蟹围网养殖是我国淡水湖泊重要的集约化养殖模式,但就其对水体温室气体排放的影响及驱动机制仍缺乏系统认识。本研究以阳澄湖大闸蟹养殖区、排水区及非养殖区为研究对象,于养殖期与非养殖期开展原位采样观测,结合顶空平衡-气相色谱法与分子生物学技术,系统探究围网养殖对水体CO2和CH4浓度、扩散通量的影响及其关键调控因子。结果表明:阳澄湖水体整体表现为大气CO2和CH4的净排放源,排放强度呈现显著的时空异质性。在养殖期,养殖区、非养殖区和排水区的CO2浓度分别为152.16、81.59和71.19 μmol·L-1,CO2扩散通量分别为204.32、61.59和41.72 mg·m-2·h-1,养殖区均显著高于非养殖区和排水区。在非养殖期,3个区域CO2浓度分别为68.86、59.51和101.92 μmol·L-1,CO2扩散通量分别为7.04、14.51和69.74 mg·m-2·h-1,排水区成为CO2最强排放源。CH4浓度与扩散通量在两个时期均呈现排水区>养殖区>非养殖区的格局,排水区在全年均为CH4排放的高值区。随机森林分析与结构方程模型显示,叶绿素a、pH、溶解性有机碳、总氮是调控CO2排放的关键因子,而CH4排放主要受溶解性有机碳、NH4+-N及甲烷氧化菌pmoA与产甲烷菌mcrA基因丰度比值的共同驱动。综上,大闸蟹围网养殖显著增强了温室气体排放,在温室气体核算中应将排水系统纳入考量。

关键词: 围网养殖, 大闸蟹, 二氧化碳, 甲烷, 阳澄湖湿地

Abstract: Enclosed aquaculture of hairy crab is an important intensive aquaculture model in freshwater lakes of China. However, there remains a lack of systematic understanding regarding its impact on greenhouse gas emissions and the underlying mechanisms. In this study, we investigated the effects of enclosed aquaculture on CO2 and CH4 concentration, diffusion flux and the key regulatory factors by field observation in Yangcheng Lake during the breeding and non-breeding periods, combined with headspace equilibrium gas chromatography method and molecular biological technique. The results showed that Yangcheng Lake was a net emission source of atmospheric CO2 and CH4, with significant spatial and temporal heterogeneity in emission intensity. During the breeding period, the CO2 emission of breeding area, non-breeding area, and drainage area were 152.16, 81.59, and 71.19 μmol·L-1, while CO2 diffusion fluxes were 204.32, 61.59 and 41.72 mg·m-2·h-1, respectively. CO2 diffusion flux in the breeding area was significantly higher than that in the non-breeding and drainage area. During the non-breeding period, CO2 emission in the three areas were 68.86, 59.51, and 101.92 μmol·L-1, while CO2 diffusion fluxes were 7.04, 14.51, and 69.74 mg·m-2·h-1, respectively, with the drainage area being the strongest emission source. The CH4 concentration and diffusion fluxes exhibited a pattern of drainage area > breeding area > non-breeding area in both periods, indicating that the drainage area was the area with the highest CH4 emission throughout the year. Random forest analysis and structural equation modelling revealed that Chl-a, pH, dissolved organic carbon and total nitrogen were key factors regulating CO2 emission, while CH4 emission were primarily driven by dissolved organic carbon, NH4+-N and the mcrA/pmoA ratio. In conclusion, hairy crab breeding activities significantly enhanced greenhouse gas emission, and thus the drainage system should be considered in the greenhouse gas assessment.

Key words: enclosure aquaculture, hairy crab, carbon dioxide, methane, Yangcheng Lake wetland