生态环境学报 ›› 2021, Vol. 30 ›› Issue (6): 1240-1248.DOI: 10.16258/j.cnki.1674-5906.2021.06.015

• 研究论文 • 上一篇    下一篇

秦皇岛海域春季海月水母碟状幼体空间分布及其与海洋环境因子的关系

薛力园1,2(), 刘志亮1,2,*(), 宋伟3, 安颖1,2, 袁晓博1,2, 陈晓1,2   

  1. 1.河北科技师范学院海洋科学研究中心,河北 秦皇岛 066004
    2.河北省海洋动力过程与资源环境重点实验室,河北 秦皇岛 066004
    3.自然资源部第一海洋研究所,山东 青岛 266061
  • 收稿日期:2021-01-25 出版日期:2021-06-18 发布日期:2021-09-10
  • 通讯作者: * 刘志亮(1977年生),男,研究员,研究方向为海洋环流动力学和海洋观测。E-mail: zhlliu3897@hevttc.edu.cn
  • 作者简介:薛力园(1989年生),男,博士,研究方向为近海生态环境。E-mail: xuealytt@126.com
  • 基金资助:
    国家重点研发计划“海洋环境安全保障”专项(2019YFC1407903);国家重点研发计划“海洋环境安全保障”专项(2019YFC1407902)

Spatial Distribution of Aurelia sp. Ephyrae and Its Relationship with Environmental Factors in the Coastal Waters of Qinhuangdao in Spring, 2020

Xue Liyuan1,2(), Liu Zhiliang1,2,*(), Song Wei3, An Ying1,2, Yuan Xiaobo1,2, Chen Xiao1,2   

  1. 1. Research Center for Marine Science, Hebei Normal University of Science and Technology, Qinhuangdao 066004, China
    2. Hebei Key Laboratory of Ocean Dynamics, Resources and Environments, Qinhuangdao, 066004, China
    3. First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
  • Received:2021-01-25 Online:2021-06-18 Published:2021-09-10

摘要:

基于2020年春季秦皇岛海域水母幼体和海洋环境调查数据,分析该海域春季海月水母(Aurelia sp.)幼体丰度的空间分布特征,并探讨了海月水母幼体空间分布与海洋环境因子之间的关系。水母幼体样品利用标准的浅水Ⅱ型浮游生物网(网口内径31.6 cm,网衣孔径160 μm)采用全水柱拖网方式进行采集。调查结果显示,4月秦皇岛海域水体温度范围在9.8—12.2 ℃之间,近岸水体温度高,离岸水体逐渐降低。盐度范围在31.49—32.03之间,受河流冲淡水的影响,汤河口和新开河口水体盐度较低。溶解氧质量浓度范围在7.70—9.56 mg∙L-1之间,在新开河口较低,高值区分布在石河口、莲花岛和金山嘴外侧海域。水体pH范围在8.01—8.32之间,在汤河口和新开河口水域较低。4月海月水母主要以碟状体形式存在,伞径范围在1—10 mm之间。海月水母碟状幼体丰度分布中心位于金梦海湾内莲花岛水域。该水域海月水母碟状幼体丰度最高(94 ind∙m-3),伞径较小,在1—1.5 mm之间。金梦海湾以外水域,海月水母碟状幼体伞径逐渐增大,丰度较少。4月莲花岛水域温暖、富氧和低盐的水体环境为海月水母碟状幼体的大量聚集提供了有利条件。统计分析结果显示,海月水母碟状幼体丰度与海水盐度呈极显著负相关性(P<0.01),与温度和溶解氧含量呈显著正相关性(P<0.05);海月水母碟状幼体伞径与海水温度呈极显著负相关性(P<0.01)。综上,该海域海月水母为本地生长型,研究结果为深入研究该海域海月水母的时空变化规律及关键驱动因子提供了基础数据。

关键词: 海月水母, 碟状幼体, 丰度, 伞径, 空间分布, 环境因子, 秦皇岛海域

Abstract:

Based on the survey data of jellyfish larvae and environmental variables in the coastal waters of Qinhuangdao (QHD) in April of 2020, the spatial distribution of Aurelia sp. ephyrae and its relationship with environmental factors were analyzed. Jellyfish larvae were collected using full-water-column and a standard plankton net (31.6-cm-internal diameter, 160-μm-mesh size). The results showed that the water temperature in the nearshore area was warmer than the offshore areas, ranging from 9.8 ℃ to 12.2 ℃. The salinity varied slightly (31.49-32.03), while the low salinity was observed at mouth of Tang River and Xinkai River due to the river runoff. The dissolved oxygen content was low at the mouth of Xinkai River, and high outside the Shi River, Lianhua Island, and Jinshanzui, ranging from 7.70 mg∙L-1 to 9.56 mg∙L-1. The pH varied from 8.01 to 8.32, while the low pH was observed at the mouth of Tang River and Xinkai River. The Aurelia sp. was mainly composed of ephyra, with bell diameter ranging from 1 mm to 10 mm. And the Aurelia sp. ephyrae were mainly distributed around the Lianhua Island. The Lianhua Island was characterized by a higher density (94 ind∙m-3) and smaller bell diameter (1-1.5 mm) of Aurelia sp. ephyrae compared to other areas. Outside the Jinmeng Bay, the bell diameter of Aurelia sp. ephyrae increased gradually and the abundance decreased. The Lianhua Island is characterized by warmer, high oxic, and low salinity in April, providing favorable conditions for the Aurelia sp. ephyrae. The abundance of Aurelia sp. ephyrae was highly negatively correlated to the salinity (P<0.01), but positively correlated to the temperature and dissolved oxygen (P<0.05). And the bell diameter of Aurelia sp. ephyrae had a significantly negative correlation with the temperature (P<0.01). The Aurelia sp. was considered to a native type due to the presence of ephyrae. Overall, this study provides important information on the distribution of Aurelia sp. ephyrae, and can help to better understand the mechanism and key factors of jellyfish bloom in the coastal waters of Qinhuangdao.

Key words: Aurelia sp., ephyrae, abundance, bell diameter, spatial distribution, environmental factors, coastal waters of Qinhuangdao

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