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南麂列岛养殖功能海域秋季潮致混合特征及其对营养盐浓度的影响
徐鹏1, 黄菊1, 蔡厚才2, 陈万东2, 章守宇1,3
1.上海海洋大学 上海 201306;2.南麂列岛国家海洋自然保护区研究所 温州 325400;3.1. 上海海洋大学 上海 201306
摘要:
为了推动海水养殖的可持续发展,研究其中水动力过程对生态要素的影响,本文基于实测数据,研究了南麂列岛养殖功能海域秋季的潮致混合特征及其对营养盐浓度的影响。结果显示,该海域雷诺应力呈现出显著落潮占优的特点,而落潮阶段高、低潮附近的转流过程又分别具有正、斜压的特点,进一步导致高潮时雷诺应力峰值被限制于近底层,而低潮时雷诺应力峰值自底至表陆续出现。南麂列岛养殖功能海域营养盐浓度很高,其中NO2、PO43−与SiO32−浓度受雷诺应力影响显著,而NO3浓度与盐度相关性明显,主要受水团控制。
关键词:  南麂列岛  养殖功能海域  潮致混合  营养盐
DOI:10.11693/hyhz20170500111
分类号:P731
基金项目:南麂列岛国家级海洋自然保护区博士后研究项目,NJKJ2016-002号;上海市自然科学基金项目,14ZR1420300号。
The characteristics of tide-induced mixing and its iMPACT ON nutrient concentration in BREADING GROUNDS IN Autumn AROUND Nanji Archipelago, EAST CHINA SEA
XU Peng1, HUANG Ju1, CAI Hou-Cai2, CHEN Wan-Dong2, ZHANG Shou-Yu1,3
1.Shanghai Ocean University, Shanghai 201306, China;2.Institute of Nanji Archipelago National Nature Reserve, Wenzhou 325400, China;3.1. Shanghai Ocean University, Shanghai 201306, China
Abstract:
Hydrodynamic processes are a vital condition to ecological systems and conducible to local sustainable aquaculture development. Using our in-situ observation data, we studied the characteristics of tide-induced mixing and its impact on nutrients concentrations in autumn in the breeding grounds around Nanji Archipelago, the East China Sea. The results demonstrate that the Reynolds stress in the sea area is ebb-dominant. During ebb tide, there is a conversion between barotropic and baroclinic tides from high to low tide. As a sequence, the high Reynolds stress is limited in the near-bottom layer during high tide while it is present successively from bottom to surface during low tide. The concentrations of nutrients in the breeding grounds around Nanji Archipelago are high. Reynolds stress exerts direct influences on NO2, PO43−, and SiO32−. However, NO3 is closely related to salinity, and thus controlled by water mass.
Key words:  Nanji Archipelago  breeding grounds  tide-induced mixing  nutrients
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