| 摘要: |
| 2022年11月-2023年7月,对荣成湾、爱莲湾、桑沟湾的三个海带养殖区开展了海水营养盐情况调查,分析了春、夏、秋、冬四个季节海带养殖过程中海水中营养盐浓度的时空分布特征,利用单因子污染指数法评价了海带养殖区DIN和PO4-P的污染指数,并对养殖区海水营养结构及潜在性富营养化情况进行研究。结果显示,三个海带养殖区海水整体营养水平较低,水质较好,仅个别养殖区在冬季水质超过海水二类标准。冬季有两个站位出现潜在性富营养化,其余站位均为贫营养级；从营养结构上看,海带养殖区存在一定程度的磷相对限制。海带养殖区营养盐水平有明显的季节变化特征,DIN浓度水平冬季最高,秋季次之,春夏季最低；PO4-P和SiO3-Si变化基本一致,从高到低依次为秋季、冬季、春季、夏季。从水平分布上看,秋季各养殖区营养盐水平基本一致,其余季节各站位由于海区养殖结构和海水交换程度的不同呈现不同的营养盐水平。 |
| 关键词: 荣成 海带养殖区 营养盐 时空分布 |
| DOI： |
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| 基金项目:山东藻类产业技术体系项目（SDAIT-26-05）；国家藻类产业技术体系项目（CARS-50）；山东省渔业软科学研究课题（202219） |
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| Nutrients structure and temporal and spatial distribution characteristics of kelp aquaculture areas in Rongcheng |
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sunyanqing1, dingyuzhu1, liangguangjin2,3, liujia1, xuyingjiang1, lijiawei1, shiliang2,3, wangjing1, zhaonan2,3, xuejinglin1, handianfeng1
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1.Shandong Marine Resource and Environment Research Institute;2.Provincial Key Laboratory of Genetic Improvement &3.Efficient Culture of Marine Algae of Shandong, Shandong Oriental Ocean Sci-Tech Co., Ltd.
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| Abstract: |
| During November 2022 to July 2023, a survey was conducted on the nutrient status of three kelp aquaculture areas in Rongcheng Bay, Ailian Bay and Sanggou Bay. The temporal and spatial distribution of nutrients concentration were analyzed and the pollution of DIN and PO4-P were evaluated by single factor contaminant index. And conduct research on the nutrient structure and potential eutrophication of seawater in aquaculture areas. The results showed that the overall nutritional level of seawater was low, and the water quality was good in the three kelp aquaculture areas. Only a few aquaculture areas in winter have water quality exceeding the Class II standard for seawater. During winter, two stations showed potential eutrophication, while the remaining stations were at the level of oligotrophication. The analysis of nutrient structure showed that there is a certain degree of relative phosphorus limitation in kelp aquaculture areas. The nutrient levels in kelp aquaculture areas have obvious seasonal variation characteristics, with DIN concentration levels being highest in winter, followed by autumn, and the lowest in spring and summer. The changes in PO4-P and SiO3-Si were basically consistent, with autumn, winter, spring, and summer in descending order. From the perspective of horizontal distribution, the nutrient levels in each aquaculture area were basically the same in autumn. In other seasons, the levels of nutrients had different, because of the different aquaculture structure and the degree of seawater exchange. |
| Key words: Rongcheng kelp aquaculture areas nutrients temporal and spatial distribution |