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| 荣成海带养殖区营养盐结构及时空分布特征 |
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孙琰晴1, 丁玉竹1, 梁广津2, 刘佳1, 徐英江1, 李佳蔚1, 史良2, 王景1, 赵楠2, 薛敬林1, 韩典峰1
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1.山东省海洋资源与环境研究院, 山东 烟台 264006;2.山东省海藻遗传育种与栽培技术重点实验室, 山东东方海洋科技股份有限公司, 山东 烟台 264003
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| 摘要: |
| 2022年11月—2023年7月, 作者对荣成湾、爱莲湾和桑沟湾3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4个季节, 海带养殖过程中海水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了研究。结果显示, 3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：10.11759/hykx20240130002 |
| 分类号:X821 |
| 基金项目:山东省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项目(202219) |
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| Nutrient structure and temporal and spatial distribution characteristics of kelp aquaculture areas in Rongcheng |
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SUN Yanqing1, DING Yuzhu1, LIANG Guangjin2, LIU Jia1, XU Yingjiang1, LI Jiawei1, SHI Liang2, WANG Jing1, ZHAO Nan2, XUE Jinglin1, HAN Dianfeng1
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1.Shandong Marine Resource and Environment Research Institute, Yantan 264006, China;2.Provincial Key Laboratory of Genetic Improvement &Efficient Culture of Marine Algae of Shandong, Shandong Oriental Ocean Sci-Tech Co., Ltd., Yantai 264003, China
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| Abstract: |
| The nutrient status of three kelp aquaculture areas in Rongcheng Bay, Ailian Bay, and Sanggou Bay was surveyed from November 2022 to July 2023. The nutrient structure and potential eutrophication of seawater in aquaculture areas were assessed by analyzing the temporal and spatial distribution of nutrient concentrations and evaluating the pollution levels of inorganic nitrogen (DIN) and active phosphate (PO4-P) via single-factor contaminant indices. The results showed that while the overall nutritional level of seawater was low, the water quality in the three kelp aquaculture areas was good. Only a few aquaculture areas in winter have water quality exceeding the Class II standard for seawater. During winter, two of the stations showed potential eutrophication, while the remaining stations exhibited oligotrophication. Nutrient structure analysis revealed the degree of relative phosphorous limitation in kelp aquaculture areas. Nutrient levels in kelp aquaculture areas have obvious seasonal variation characteristics, with the highest DIN concentrations in winter and autumn and the lowest in spring and summer. The seasonal variation trend of PO4-P and active silicate (SiO3-Si) were consistent, with autumn, winter, spring, and summer in descending order.The horizontal distribution of nutrient levels in each aquaculture area was similar in autumn but differed in other seasons due to differences in aquaculture structures and the degree of seawater exchange. |
| Key words: Rongcheng kelp aquaculture areas nutrients temporal and spatial distribution |