渤海湾大型底栖动物调查及与环境因子的相关性研究

Abstract

PDF HTML阅读 XML下载 导出引用 引用提醒 渤海湾大型底栖动物调查及与环境因子的相关性 DOI: 10.5846/stxb201305020903 作者: 作者单位: 四川农业大学,交通运输部天津水运工程科学研究所 天津,交通运输部天津水运工程科学研究所 天津,国家海洋局第一海洋研究所 山东 青岛,四川农业大学 作者简介: 通讯作者: 中图分类号: 基金项目: 科技基础性工作专项资助项目（2012FY112500）；中央级公益性科研院所基本科研业务费专项资金资助项目（TKS100105） Macroinvertebrate investigation and their relation to environmental factors in Bohai Bay Author: Affiliation: College of Resource and Environment,Sichuan Agricultural University,Tianjin Research Institute for Water Transport Engineering,Tianjin Research Institute for Water Transport Engineering,First Institute of Oceanography,SOA,College of Resource and Environment,Sichuan Agricultural University Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:对渤海湾大型底栖动物和环境因子进行调查，利用多元分析技术对大型底栖动物与环境因子之间的关系进行研究。调查期间共发现大型底栖动物45种，平均密度为406个/m2。大型底栖动物数量空间变化明显，呈现从近岸到外海降低的变化特征。运用典范对应分析（CCA）探讨大型底栖动物与环境因子之间的关系，并采用向前引入法对环境因子进行逐步筛选，Monte Carlo置换检验结果显示，水深、无机氮和溶解氧是影响渤海湾大型底栖动物空间分布的关键环境因子。 Abstract:Bohai Bay is a semi-enclosed bay, which is located in the western region of Bohai Sea in northern China. This bay has been conditioned strongly, historically, by different anthropogenic pressures. In particular, during the recent three decades, with rapid industrialization and urbanization, the seashore area of Bohai Bay were reclaim for agriculture and aquiculture, and subsequent occupation of those areas for urban, industrial and port developments have provoked a dramatic reduction in size. The seawater quality of Bohai Bay is deteriorated gradually. Due to the low movement of macroinvertebrate, they can be as a good indicator of change in their environment. In the present study, an interdisciplinary survey of hydrological, chemical and biological resources was conducted in the Bohai Bay in May 2008. The distribution of macroinvertebrate and their relation to environmental factors were performed with multivariate analysis techniques. The main aim of this study is describe the composition and abundance of macroinvertebrate and to select the best variables describing the macroinvertebrate distribution in Bohai Bay. The result shown that there were 45 taxa were observed during the study period. The highest frequency of the species is Nucula paulula, which contributed up to 77% of the stations. Planocera sp., Protankyra bidentata and Raphidopus ciliatus were also found in more than 50% of the stations. The mean of macroinvertebrate abundance was 406 ind./m2. The high abundance of macroinvertebrate was found at the coastal sites, while the low at the offshore sites. The highest abundance was found in the S7, with 6008 ind./m2. However, there were not macroinvertebrate were found in the S20, where is nearly the Tianjin Port. There were three dominant species including Abrina lunella, Nucula paulula and Theora fragilis during study periods, with the dominance of 0.02, 0.03 and 0.22, respectively. Abrina lunella and Nucula paulula were found in most of the stations, however, Theora fragilis mainly distributed in the S7 and S8. Compared to the other investigations in the Bohai Bay, the species number, density and dominant species were significantly varied. For example, there were 122 species in the 1983, while 45 species in the present study. It is unexpected that there were 111 species in the 2011. These results indicate that there was variation in the macroinvertebrate community in Bohai Bay. This can be explained by the fact that the changes in the environmental quality of the Bohai Bay as a result of the anthropogenic pressures. Multivariate ordination techniques were used to analyze the effects of environmental variables on the macroinvertebrate community by CANOCO version 4.5. The measured environmental factors, including water depth, water temperature, pH, salinity, dissolved oxygen, dissolved inorganic nitrogen, soluble reactive phosphorus, and silicate. All of these environmental variables were log10 (x+1) transformed before analysis except for pH. In the data matrix of species abundance, only those taxa that occurred greater than 5% of the total abundance at least in one sample were incorporated into the analysis. The species data were log10 (x+1) transformed before analysis to obtain consecutive distributions. The results of canonical correspondence analysis (CCA) with forward selection indicated that water depth (F=1.71, P=0.01), dissolved inorganic nitrogen (F=1.84, P=0.01)and dissolved oxygen (F=1.68, P=0.02), were the most important environmental factors influence macroinvertebrate assemblages during the study periods. 参考文献 相似文献 引证文献