潮间带是连接陆地生态系统与海洋生态系统的关键带状区域,其中,淤泥质潮滩是重要而容易被忽视的CO 2自然汇集生境,该生境中不同门类的大型底栖动物在促进碳的输入、传递和存储过程中发挥核心作用。本文以夏季浙江东部沿海隘顽湾淤泥质...潮间带是连接陆地生态系统与海洋生态系统的关键带状区域,其中,淤泥质潮滩是重要而容易被忽视的CO 2自然汇集生境,该生境中不同门类的大型底栖动物在促进碳的输入、传递和存储过程中发挥核心作用。本文以夏季浙江东部沿海隘顽湾淤泥质潮滩断面作为切入点,研究大型底栖动物群落结构及生物碳库。结果显示,隘顽湾淤泥质潮滩大型底栖动物平均丰度为105.2±37.2 ind m^(2),平均生物量为46.9±6.4 g m^(2),其生境内主要类群组成为甲壳类动物和软体动物,生态系统健康程度整体表现为优秀。隘顽湾潮滩中大型底栖动物有机碳含量由高到低分别为其他类(包括鱼类、纽虫)动物(40.95%)、多毛类动物(22.98%)、甲壳类动物(17.24%)、棘皮动物(15.90%)和软体动物(10.76%)。估算研究区域大型底栖动物碳库约为163.90 Mg,其中甲壳类动物为最大贡献者,占比59.80%。淤泥质潮滩大型底栖动物群落结构与生物碳库大小的探究,可作为我国蓝碳调查体系构建的重要科学依据,也可为进一步量化沿海生境整体碳库大小提供基础数据。展开更多
To assess the effects of hypoxia, macrobenthic communities along an estuarine gradient of the Changjiang estuary and adjacent continental shelf were analyzed. This revealed spatial variations in the communities and re...To assess the effects of hypoxia, macrobenthic communities along an estuarine gradient of the Changjiang estuary and adjacent continental shelf were analyzed. This revealed spatial variations in the communities and relationships with environmental variables during periods of reduced dissolved oxygen(DO) concentration in summer. Statistical analyses revealed significant differences in macrobenthic community composition among the three zones: estuarine zone(EZ), mildly hypoxic zone(MHZ) in the continental shelf, and normoxic zone(NZ) in the continental shelf(Global R =0.206, P =0.002). Pairwise tests showed that the macrobenthic community composition of the EZ was significantly different from the MHZ(pairwise test R =0.305, P =0.001) and the NZ(pairwise test R =0.259, P =0.001). There was no significant difference in macrobenthic communities between the MHZ and the NZ(pairwise test R =0.062, P =0.114). The taxa included small and typically opportunistic polychaetes, which made the greatest contribution to the dissimilarity between the zones. The effects of mild hypoxia on the macrobenthic communities are a result not only of reduced DO concentration but also of differences in environmental variables such as temperature, salinity, and nutrient concentrations caused by stratification.展开更多
Macrobenthos samples were collected from the Yellow and East China Seas in four seasons during 2011 to 2012. The seasonal distribution of macrobenthos and its relationship with environmental factors were analyzed. A t...Macrobenthos samples were collected from the Yellow and East China Seas in four seasons during 2011 to 2012. The seasonal distribution of macrobenthos and its relationship with environmental factors were analyzed. A total of 562 macrobenthic species were identified, with polychaetes and mollusks accounting for 67% of the total number of species. A similarity percentage(SIMPER) analysis showed that the dominant species were bivalve mollusks in the Yellow Sea and small-sized polychaetes in the East China Sea. A two-factor analysis of variance showed significant seasonal variations in species number, density and diversity index, and significant regional differences of biomass and density. Two-factor community similarity analysis also showed significant seasonal and regional differences in macrobenthic communities. Canonical correspondence analysis indicated that the main environmental factors af fecting the macrobenthic communities were water depth, temperature, dissolved oxygen, and inorganic nitrogen. The results demonstrate significant regional differences and seasonal variations in macrobenthos in the two seas. Sediment properties and water mass characteristics are speculated to be the causes of regional differences.展开更多
文摘潮间带是连接陆地生态系统与海洋生态系统的关键带状区域,其中,淤泥质潮滩是重要而容易被忽视的CO 2自然汇集生境,该生境中不同门类的大型底栖动物在促进碳的输入、传递和存储过程中发挥核心作用。本文以夏季浙江东部沿海隘顽湾淤泥质潮滩断面作为切入点,研究大型底栖动物群落结构及生物碳库。结果显示,隘顽湾淤泥质潮滩大型底栖动物平均丰度为105.2±37.2 ind m^(2),平均生物量为46.9±6.4 g m^(2),其生境内主要类群组成为甲壳类动物和软体动物,生态系统健康程度整体表现为优秀。隘顽湾潮滩中大型底栖动物有机碳含量由高到低分别为其他类(包括鱼类、纽虫)动物(40.95%)、多毛类动物(22.98%)、甲壳类动物(17.24%)、棘皮动物(15.90%)和软体动物(10.76%)。估算研究区域大型底栖动物碳库约为163.90 Mg,其中甲壳类动物为最大贡献者,占比59.80%。淤泥质潮滩大型底栖动物群落结构与生物碳库大小的探究,可作为我国蓝碳调查体系构建的重要科学依据,也可为进一步量化沿海生境整体碳库大小提供基础数据。
基金Supported by the National Basic Research Program of China(973 Program)(No.2010CB428903)the National Marine Public Welfare Research Project of China(Nos.201505004-3,201305043)+1 种基金the Scientific Research Fund of the Second Institute of Oceanography,SOA(No.JG1312)the National Special Fund of Chinese Offshore Investigation and Assessment(No.908-01-ST04)
文摘To assess the effects of hypoxia, macrobenthic communities along an estuarine gradient of the Changjiang estuary and adjacent continental shelf were analyzed. This revealed spatial variations in the communities and relationships with environmental variables during periods of reduced dissolved oxygen(DO) concentration in summer. Statistical analyses revealed significant differences in macrobenthic community composition among the three zones: estuarine zone(EZ), mildly hypoxic zone(MHZ) in the continental shelf, and normoxic zone(NZ) in the continental shelf(Global R =0.206, P =0.002). Pairwise tests showed that the macrobenthic community composition of the EZ was significantly different from the MHZ(pairwise test R =0.305, P =0.001) and the NZ(pairwise test R =0.259, P =0.001). There was no significant difference in macrobenthic communities between the MHZ and the NZ(pairwise test R =0.062, P =0.114). The taxa included small and typically opportunistic polychaetes, which made the greatest contribution to the dissimilarity between the zones. The effects of mild hypoxia on the macrobenthic communities are a result not only of reduced DO concentration but also of differences in environmental variables such as temperature, salinity, and nutrient concentrations caused by stratification.
基金Supported by the National Basic Research Program of China(973 Program)(No.2010CB428903)the National Marine Public Welfare Research Project of China(No.201505004-3)+1 种基金the National Natural Science Foundation of China(No.41706125)the Scientific Research Fund of the Second Institute of Oceanography,SOA(No.JG1616)
文摘Macrobenthos samples were collected from the Yellow and East China Seas in four seasons during 2011 to 2012. The seasonal distribution of macrobenthos and its relationship with environmental factors were analyzed. A total of 562 macrobenthic species were identified, with polychaetes and mollusks accounting for 67% of the total number of species. A similarity percentage(SIMPER) analysis showed that the dominant species were bivalve mollusks in the Yellow Sea and small-sized polychaetes in the East China Sea. A two-factor analysis of variance showed significant seasonal variations in species number, density and diversity index, and significant regional differences of biomass and density. Two-factor community similarity analysis also showed significant seasonal and regional differences in macrobenthic communities. Canonical correspondence analysis indicated that the main environmental factors af fecting the macrobenthic communities were water depth, temperature, dissolved oxygen, and inorganic nitrogen. The results demonstrate significant regional differences and seasonal variations in macrobenthos in the two seas. Sediment properties and water mass characteristics are speculated to be the causes of regional differences.
