文章摘要
枸杞岛铜藻气囊形态特征及其与环境因子的关系
Morphological characteristics of vesicle of Sargassum horneri and its relationship to environmental factors in Gouqi Island
投稿时间:2019-05-10  修订日期:2019-07-29
DOI:
中文关键词: 铜藻  净效积温  漂流藻  金潮  海洋牧场  海藻场
英文关键词: Sargassum horneri  net effective accumulated temperature  floating Sargassum  golden tides  marine ranching  seaweed beds
基金项目:国家自然科学基金,其它
作者单位E-mail
吴祖立 中国水产科学研究院东海水产研究所 wuzuli@hotmail.com 
陈亮然 北京林业大学自然保护区学院  
王凯 上海海洋大学海洋生态与环境学院  
章守宇 上海海洋大学海洋生态与环境学院 syzhang@shou.edu.cn 
毕远新 浙江省海洋水产研究所  
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中文摘要:
      为更好地分析东海海域漂流铜藻来源于舟山海域底栖铜藻的可能性提供实地生态学参考依据,本研究以枸杞岛海域底栖铜藻为对象,研究底栖铜藻植株和气囊的形态特征变化及其对海洋环境因子变化的响应,探讨底栖铜藻气囊发育成熟的窗口期。研究发现9月铜藻植株顶部的主侧枝开始出现气囊,翌年3—5月铜藻藻体生长速率最大,3—4月主侧枝的气囊数量快速增长,4月每根主侧枝平均气囊数量达最大,气囊发育成熟。各月气囊的数量、平均长度和平均湿重的分布是顶部主侧枝>中部主侧枝>底部主侧枝,平均直径较均匀,底部主侧枝气囊平均体积显著小于顶部和中部的。铜藻完成生活史所需的净效积温为4 434.75 ℃/d,9月气囊开始出现时所需的净效积温为1 853.47 ℃/d,4月气囊生长发育达到峰值所需的净效积温为3 611.25 ℃/d。研究海域的海温变化主要受季风活动引起的海流变化影响,海水低温期后的升温条件可能是诱发铜藻快速生长的因素,较高的海温可限制铜藻的生长。
英文摘要:
      In order to better analyze the possibility that the floating Sargassum horneri in East China Sea originated from benthic S. horneri in Zhoushan sea area, and provide an ecological reference for effective tracking and monitoring of floating Sargassum, morphological characteristics of vesicle of S. horneri and its relationship to environmental factors were investigated. The results showed that algae began to have vesicle in September, and have a highest growth rate from March to May. The number of vesicles in the main side branches increased rapidly from March to April, and reached a maximum in April. The number, average length, average wet weight and average volume of vesicles in each month outnumbered in top main side branch than in middle and bottom main side branch, but the average diameter was relatively uniform. The net effective accumulated temperature needed by S. horneri to complete the life history was 4 434.75 ° C/d. Vesicle germinating net effective accumulated temperature in September was 1 853.47 ° C/d, and development completing net effective accumulated temperature in April was 3 611.25 °C/d. The sea surface temperature change in the study area is mainly affected by the current changes caused by monsoon activity. The warming condition after a low temperature period of sea water may be the factor that induces the rapid growth of S. horneri, and higher sea temperature can limit algae growth.
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