大亚湾营养物质变异特征
The characteristics of nutrients variation in the Daya Bay
-
摘要: 利用大亚湾现场调查和室内模拟数据,以及大亚湾生态网络17～18年8个航次的现场调查资料,采用营养状态质量指数(NQI)的方法评价大亚湾海域富营养化水平,结果表明,大亚湾海域除部分养殖海区为中营养状态外,大部分为贫营养状态;溶解态的无机磷和硅在过去10a多有较大幅度的下降,而溶解态的无机氮、溶解氧和叶绿素a则上升;浮游植物生长由过去认为由氮控制转变为现在由磷控制.分析了养殖海区底层海水、上覆水、沉积物间隙水中营养盐的含量及其化学形态.估算了沉积物-海水界面营养盐扩散通量,NH4+,NO2-,NO3-,HPO42-,H4SiO4平均通量分别为302.0,-0.06,-1.82,2.53,47.6μmol/(m2·d).室内模拟了天然海水体系表层沉积物营养盐的吸附-解吸及其磷酸盐在沉积物上的吸附等温线.论述了大亚湾海域营养盐与赤潮的关系.Abstract: Investigation data in-situ and simulation data in laboratory are used,combining with Chinese Ecological Research Network(CERN) investigation data of 8 cruises from 1997 to 1998 in the Daya Bay,to assess eutrophication status by nutrient quality index(NQI) method in the Daya Bay.Most of water areas of the Daya Bay are oligotrophication,except the cultural water area is mesotrophication.The growth of phytoplankton is governed now by phosphorus instead of by nitrogen in the past.The nutrients content and their chemical forms in the interstitial water,the overlying water and the bottom water are analyzed.The diffusive fluxes of nutrient across sediment-sea water interface have been calculated,and the,average fluxes of ammonium,nitrite,nitrate,phosphate and silicate are 302.0,-0.06,-1.82,2.53,47.96 μamol/(m2·d),respectively.The desorption-absorption of nutrients in surface sediments is simulated and the absorption isotherm of phosphate on sediments is studied under the natural sea water system.The relationship of nutrients and red tides in the Daya Bay are discussed.
-
Key words:
- nutrients /
- flux /
- desorption-absorption /
- red tides
-
GEOHAB.The Global Ecology and Oceanography of Harmful Algal Blooms[M].Joint SCOR-IOC Workshop,Havrholm,Denmark,1998. 林永水.近海富营养化与赤潮研究[M].北京:科学出版社,1997.30～39,111～115. 徐恭昭,等.大亚湾环境与资源[M].合肥:安徽科学技术出版社,1989.1～231. 韩舞鹰.南海海洋化学[M].北京:科学出版社,1998.50～81,60～61. 杨炼锋,李锦蓉,余汉生.沉积物中营养盐对大鹏湾赤潮影响的初步探讨[J].海洋与湖沼,1995,26(5)增刊:83～87. 陈水土,阮五崎.九龙江口、厦门西海域磷的生物地球化学研究[J].海洋学报,1994,16(2):63～71. 何清溪,张穗,方正信,等.大亚湾沉积物中氮磷的地球化学形态分配特征[J].热带海洋,1992,11(2):38～45. 宋金明,李鹏程,吴林兴,等.南沙群岛珊瑚礁生态系沉积物-海水界面间的扩散转移通量[A].南沙群岛珊瑚礁泻湖化学与生物学研究[M].北京:海洋出版社,1997.84～92. 俞志明,马锡年,谢阳.黏土矿物对海水中主要营养盐的吸附研究[J].海洋与湖沼,1995,26(2):208～213. SERRUYA C,LAKE Kinneret.The nutrient chemistry of the sedimen[J].Liminol Oceanol,1971,16(3):510～521. ANDERSEN J M.Effect of nitrate concentration in lake water on phosphate release from the sedimentt [J].Water Res,1982,16:1 119～1 126. 焦念志.关于沉积物释磷问题的研究[J].海洋湖沼通报,1989,(2):80～84. 赵宏宾,刘莲生,张正斌.海水中磷酸盐在固体粒子上阴离子交换作用[J].海洋与湖沼,1997,28(2):172～177.28(3):294～302. 丘耀文,王肇鼎,王祥珍,等.大亚湾大鹏澳水域悬浮物的组成和沉积动态[A].邹仁林.大亚湾海洋生物资源的持续利用[M].北京:科学出版社,1996.117～121. ZHANG Zheng-bin,LIU Lian-sheng.Theory of Interfacial Stepwise Ion/Coordination Particle Exchange and Its Applications[M].Beijing:China Ocean Press,1985. 林永水.大亚湾核电站临近水域浮游植物研究[A].大亚湾生态系统研究(一)[C].北京:气象出版社,1999.59～72. -
计量
- 文章访问数: 982
- HTML全文浏览量: 32
- PDF下载量: 759
- 被引次数: 0
下载:
