| 摘要: |
| 苏北浅滩是研究浒苔绿潮早期形成机制的重要区域，该区域紫菜养殖筏架上附生绿藻的群落结构变化对浒苔绿潮的发生具有重要影响，环境因素在其中发挥了重要作用。为了探明导致苏北浅滩绿藻群落结构变化的主要环境因素，本文通过分子生物学和种群生态学方法对筏架附生绿藻群落结构进行了研究，结果表明：（1）苏北浅滩筏架附生绿藻群落主要由浒苔（Ulva prolifera）、盘苔（Blidingia sp.）、缘管浒苔（Ulva linza）、曲浒苔（Ulva flexuosa）和其他绿藻5个类群构成；（2）绿藻群落具有明显的演替现象，环境温度是导致绿藻群落结构变化的关键环境因素，适低温性的绿藻逐渐被浒苔等适应较高温度的绿藻取代；（3）浒苔的生物量从3月的1.65 g/m增加到了5月的31.78 g/m，所占比例也从低于5%达到接近40%，生物量的大量积累为绿潮早期漂浮斑块的形成提供了物质基础。本文研究结果为黄海绿潮的早期预警和防控提供了生态学依据。 |
| 关键词: 浒苔绿潮 苏北浅滩 群落结构 生物量 环境因子 |
| DOI：10.11693/hyhz20200400111 |
| 分类号:Q14 |
| 基金项目:国家重点研发计划，2016YFC1402102号；国家自然科学基金，41706121号，41976132号；国家自然科学基金-山东联合基金，U1806213号，U1606404号；中央高校基础研究经费，201964025号。 |
附件 |
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| STRUCTURAL CHANGE OF GREEN MACROALGAL COMMUNITY ATTACHED ON RAFTS IN SUBEI SHOAL AND ITS CORRELATION WITH ENVIRONMENTAL FACTORS |
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HAO Ya1, GUAN Chen1, HOU Cheng-Zong1, TANG Xue-Xi1,2, WANG Ying1,2
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1.College of Marine Life Sciences, Ocean University of China, Qingdao 266100, China;2.Laboratory for Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao 266237, China
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| Abstract: |
| Subei Shoal (North Jiangsu Shoal) is an important area to study the early formation mechanism of Ulva prolifera green tide. The structural change of the green macroalgal community attached on Pyropia aquaculture rafts in Subei Shoal had been found closely related to the occurrence of the U. prolifera green tide, and environmental factors played important roles in the succession of green macroalgae community. To find out the main environmental factor that lead to the structural change of the green macroalgal community, we investigated the green macroalgal community structure on the rafts through the techniques of molecular biology and population ecology. Results show that the green macroalgal community in Subei Shoal was mainly composed of U. prolifera, Blidingia sp., Ulva linza, Ulva flexuosa, and other green macroalgae. In addition, statistic results of the biomass show a typical succession of the green macroalgal community. Temperature was the main environmental factor leading to the structural change, and green macroalgae adapted to low temperature were gradually replaced by green macroalgae that adapted to higher temperatures, such as U. prolifera. Moreover, the biomass of U. prolifera increased from 1.65 g/m in March to 31.78 g/m in May, and the proportion of U. prolifera increased from <5% to nearly 40%. The accumulation of U. prolifera biomass provided a biogenic basis for the formation of floating patches in the early stage of the green tide. The results of this study provided an ecological basis for the early warning and prevention of U. prolifera green tide. |
| Key words: Ulva prolifera green tide Subei Shoal community structure biomass environmental factors |
