金塘岛海域叶绿素a的分布及其与环境因子关系研究

2015-10-21 18:06:31金衍健李子孟朱剑等
安徽农业科学 2015年31期

金衍健 李子孟 朱剑等

摘要[目的]研究金塘岛海域叶绿素a(Chla)的分布及其与环境因子的关系。[方法]2013年5月(春季)和10月(秋季)对金塘岛海域分别进行调查取样,分析了该海域Chla和SS的时空分布特征,及其与水温、盐度、pH、DO、COD、营养盐等主要环境因子的相关关系。[结果]春季Chla含量在0.011~0.915 μg/L之间变化,平均含量为0.551 μg/L;SS含量在58.8~1 186.0 mg/L之间变化,平均含量为488 mg/L。秋季Chla含量在0.316~1.246 μg/L之间变化,平均含量为0.701 μg/L;SS含量在372~1 628 mg/L之间变化,平均含量为881 mg/L。金塘岛海域春季Chla含量与环境因子并不存在极显著的相关性,春季SS含量虽然与Chla含量不存在显著性相关,但也具有一定的相关性(r=-0.474,n=12)。秋季Chla含量与pH(r=-0.582, n=12, P<0.05)、SS(r=0.596, n=12, P<0.05)之间具有显著相关性。[结论]该研究可为金塘岛海域的生态监测、评价提供依据,也可为该海域海洋资源可持续利用和发展提供科学依据。

关键词金塘岛;叶绿素a;SS;环境因子

中图分类号S181.3文献标识码

A文章编号0517-6611(2015)31-236-03

The Distribution of Chla and the Relationship with Environmental Factors in the Sea Region of Jintang Island

JIN Yanjian, LI Zimeng, ZHU Jian et al

(Key Research Station of Fisheries Resources of Main Fishing Ground, Ministry of Agriculture, Marine Fisheries Research Institute of Zhejiang, Zhoushan, Zhejiang 316021)

Abstract [Objective] The research aimed to study the distribution of Chla and the relationship with environmental factors in the sea region of Jintang Island. [Method] The distribution of Chla and SS, the correlation between Chla and environmental factors (water temperature, salinity, pH, DO, COD and nutrient) in the sea region of Jintang Island were analyzed through spring and autumn survey in 2013. [Result] The Chla content varied between 0.011 and 0.915 μg/L with the mean value of 0.551 μg/L, while the SS content varied between 58.8 and 1 186.0 mg/L with the mean value of 488 mg/L in spring. The Chla content varied between 0.316 and 1.246 μg/L with the mean value of 0.701 μg/L, while the SS content varied between 372 and 1 628 mg/L with the mean value of 881 mg/L in autumn. The correlation analysis showed that there was no significant correlations between Chla and environmental factors in spring, but there was a certain correlation with SS (r=-0.474,n=12). However, there were significant correlations with pH (r=-0.582, n=12, P<0.05) and SS (r=0.596, n=12, P<0.05) in autumn. [Conclusion] The research could provide basis for ecological monitoring and evaluation, sustainable utilization and development of marine resources in the sea region.

Key words Jintang Island; Chla; SS; Environmental factors

金塘島是舟山群岛中的第四大岛,与舟山本岛仅一水之隔,全岛面积为76 km2,东与舟山本岛最近岸距6.25 km,南与宁波北仑港相隔仅3.5 km。金塘岛附近海域总体呈南北走向延伸,地处长江口、 杭州湾南部,紧邻甬江入海口,受地表径流来水影响较大[1]。

浮游植物是海洋生态系统最主要的初级生产者,也是整个海洋食物链的起点和生物地化循环的重要环节[2]。海域叶绿素a(Chla)的浓度变化受到水温、光照、盐度、营养盐以及浮游动物摄食等多个环境和生物因素的影响,是开展生态系统研究的基础。Chla含量不仅是研究浮游植物生物量、时空分布和动态变化的主要指标,同时也反映了整个生态系统的营养盐分布、生态系统健康状态以及动态变化[3]。

笔者通过2013 年5 月(春季)和10 月(秋季)对金塘岛周围海域分别进行调查取样,研究该金塘岛周围海域的Chla、理化因子及营养盐,为该海域的生态监测、评价提供依据,也为该海域海洋资源可持续利用和发展提供科学依据。……

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