摘要
比较分析钦州湾1983—1984年及1996—1997年丰、枯水期水化学要素含量,论述该湾营养状况及其影响因素。研究表明,该湾水环境主要参数(S、pH和DO)均呈下降趋势,而相应的DIN、DIP、SiO-3和COD则多呈上升趋势。相关分析表明,陆源水的物理混合过程是影响诸营养盐含量的主要因素,生物、化学作用次之;通过N∶P、Si∶N、Si∶P原子比分析可知,该湾营养盐结构具有由明显N限制转变为明显P限制的规律,而Si呈富足状态。营养状态指数显示,该湾营养水平均呈上升趋势,但富营养型水域仅出现在1997年丰水期,其余季度月均保持明显贫营养型。
According to the comparative studies on the contents of key hydrochemical elements in the Qinzhou Bay in 1983—1984 and 1996—1997 respectively, the nutrient conditions and their influencing factors during the high and low water periods were discussed. The results showed that the values of major water environment parameters in this bay, including salinity, pH and dissolved oxygen, all increased through the fifteen years; on the contrary, the values of DIN, DIP, SiO-3 and COD all decreased. The correlation analysis showed that the physical mixing course of water from land was the major factor influencing the nutrient salt, and the biological and chemical factors were secondly. The analysis on the atomic ratios of N∶P, Si∶N and Si∶P showed that the structure of nutrient salt changed from manifest N limitation to P limitation, and Si was rich all the time. The indexes of nutrient condition showed that the nutrient level in this bay had a rising tendency, but rich nutrient type only appeared in the high water period of 1997 in some waters, which kept in low nutrient type in other periods.
出处
《热带海洋学报》
CAS
CSCD
北大核心
2003年第3期16-21,共6页
Journal of Tropical Oceanography
关键词
钦州湾
水化学要素含量
营养状况
影响因素
Qinzhou Bay
key hydro-chemical element
nutrient condition
influencing factor
