| 摘要: |
| 根据 2019 年该海域海水营养盐四季的调查数据，文章分析了营养盐质量浓度和空间分布特征，并评价了氮、磷、硅营养盐对浮游植物生长的制约因素。结果表明，海阳海域溶解无机氮
（DIN）的主要形式是 NO --N，其次为 NH +-N，NO --N 质量浓度最低，冬季的 DIN 质量浓度显
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著高于其他季节。夏秋季 PO 3--P 质量浓度高于冬春季，冬季表层 PO 3--P 质量浓度最低。夏秋
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季 SiO 2--Si 质量浓度显著低于冬春季节。不同季节中，DIN、PO 3--P、SiO 2--Si 质量浓度高值
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区主要分布在近岸海域、乳山湾口门外以及离岸 10 ～ 15 km 区域，整体呈现由近岸向远岸质量浓度递减趋势。潜在富营养化评价表明，海阳海域基本处于贫营养状态，冬季则处于磷限制中度 营养状态。文章系统阐述了海阳海域营养盐的空间分布及潜在的限制性，为该海域水质监测管理 提供了基础数据支撑。 |
| 关键词: 营养盐 空间分布 限制因子 |
| DOI：10.20016/j.cnki.hykfygl.2026.02.007 |
| 投稿时间：2025-09-25修订日期：2026-01-21 |
| 基金项目: |
|
| Spatial Distribution of Nutrients and the Potential Limitation for Phytoplankton Growth in the Coastal Waters of Haiyang |
| LIU Xiaodan,ZHANG Kun,LIU Shujun,WU Siqi |
| North China Sea Survey Center，MNR;Zhengzhou University |
| Abstract: |
| Based on the 2019 seasonal survey data of seawater nutrients，this study analyzed the concentration characteristics and spatial distribution patterns of nutrients，and assessed the limiting effects of nitrogen，phosphorus， and silicon nutrients on phytoplankton growth in the study area．The results indicated that nitrate nitrogen（NO --N） was the dominant component of dissolved inorganic nitrogen（DIN），followed by ammonium nitrogen（NH4 -N）， while nitrite nitrogen（NO2--N）had the lowest concentration．The DIN concentration in winter was significantly higher than that in other seasons．For phosphate phosphorus（PO4 -P），its concentrations in summer and autumn were higher than those in spring and winter，with the minimum concentration recorded in winter；The concentration of silicate silicon（SiO32--Si）in summer and autumn was significantly lower than that in spring and winter．In terms of spatial distribution，the high-concentration zones of DIN，PO 3--P，and SiO 2--Si across different seasons were
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mainly distributed in the nearshore area，the outer entrance of Rushan Bay，and the offshore region 10 ～ 15 km from the shore，with concentrations exhibiting a decreasing trend from nearshore to offshore areas．Analysis of nutrient potential limitation revealed that the coastal waters of Haiyang were basically oligotrophic，except for being moderately phosphorus-limited in winter．This study systematically elaborated on the spatial distribution characteristics and potential limiting effects of nutrients in the coastal waters of Haiyang，providing fundamental data support for water quality monitoring and management in this sea area． |
| Key words: Nutrients,Spatial distribution,Limiting factors |
