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乐清湾海域真刺唇角水蚤在盐度梯度下的生态阈值研究
李轶,杨旖祎,叶属峰
0
(1.上海海洋大学,上海 201306; 2.国家海洋局东海环境监测中心,上海 201206; 3.国家海洋局海洋赤潮灾害立体监测技术与应用重点实验室,上海 201206)
摘要:
基于2016年5月乐清湾海域的海洋调查资料,分析了浮游动物真刺唇角水蚤(Labidocera euchaeta)的优势度及其与海水盐度(S)的相关性,并利用高斯模型研究了在盐度梯度下真刺唇角水蚤丰度的生态阈值(Ecological Threshold,ET)。结果表明:真刺唇角水蚤是乐清湾海域春季浮游动物优势种之一,优势度为0.061;其丰度与盐度呈极显著负相关关系(p<0.01),盐度是影响真刺唇角水蚤水平分布的主要因素之一;其最适盐度值为21.36,最适盐度生态阈值区间为[20.17,22.55],真刺唇角水蚤在盐度梯度下的生态阈值区间为[18.99,23.73]。此外,还探讨了盐度对真刺唇角水蚤生长的影响,以及此生态阈值研究在乐清湾海域资源环境承载能力监测预警中的作用。
关键词:  海洋生物学  真刺唇角水蚤  盐度  高斯模型  生态阈值  乐清湾
DOI:
基金项目:海洋公益性行业科研专项基金资助项目(201505008)
Ecological thresholds of Labidocera euchaeta to the gradient of salinity in Yueqing Bay, Zhejiang Province
LI Yi,YANG Yi-yi,YE Shu-feng
(Shanghai Ocean University, Shanghai 201306, China;East China Sea Environmental Monitoring Center, SOA, Shanghai 201206, China;East China Sea Environmental Monitoring Center, SOA, Shanghai 201206, China;Key Laboratory of Integrated Marine Monitoring and Applied Technologies for Harmful Algal Blooms, SOA, Shanghai 201206, China)
Abstract:
Based on the oceanographic survey in Yueqing Bay in May 2016, the zooplankton dominant species and their relations with the salinity were studied. At the same time the ecological threshold of Labidocera euchaeta abundance on the salinity gradient was analyzed with the Gauss model. The results showed that the species Labidocera euchaeta, as a dominant species in spring in Yueqing Bay, had dominant index of 0.061 and its abundance was significantly and negatively correlated with the salinity (p<0.01). Salinity is one of main factors affecting the horizontal distribution of the copepod. It is found that the optimal salinity is 21.36 with threshold ranges from 20.17 to 22.55. On the salinity gradient, the ecological threshold ranges from 18.99 to 23.73. In addition, the effect of salinity on the growth of Labidocera euchaeta and the role of ecological threshold are discussed for the monitoring and early warning of environment carrying capacity of Yueqing Bay.
Key words:  marine biology  Labidocera euchaeta  salinity  Gaussian model  ecological threshold  Yueqing Bay

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