长江流域资源与环境 >> 2024, Vol. 33 >> Issue (1): 163-174.doi: 10.11870/cjlyzyyhj202401014

• 生态环境 • 上一篇    下一篇

三峡水库汉丰湖溶解态硅、氮、磷浓度及生态化学计量时空变化特征

朱舜垚,梁珂,何丙辉*,李天阳,赵秀兰,吴浩晨   

  1. (西南大学资源环境学院,重庆 400715)

  • 出版日期:2024-01-20 发布日期:2024-02-01

Temporal and Spatial Characteristics of Dissolved Silicon, Nitrogen and Phosphorus Concentrations and Ecological Stoichiometry in the Hanfeng Lake of the Three Gorges Reservoir

ZHU Shun-yao, LIANG Ke, HE Bing-hui,LI Tian-yang,ZHAO Xiu-lan,WU Hao-chen   

  1. (College of Resources andEnvironment,Southwest University,Chongqing 400715,China)
  • Online:2024-01-20 Published:2024-02-01

摘要: 明确水体中典型营养盐成分如硅(Si)、氮(N)、磷(P)及其生态化学计量时空变化特征,将有助于探究水体富营养化程度及浮游植物营养限制状态。在三峡水库汉丰湖设7个采样点,于2020年5月~2021年4月取样后测定可溶性硅酸盐(DSi)、可溶性总氮(DN)、可溶性总磷(DP)、叶绿素a(Chl-a)等指标的浓度时空变化特征,通过Si、N、P的生态化学计量关系,评估水体浮游植物养分限制状态。结果表明:在时间变化上,水体中DSi月平均浓度为18.80 mg·L-1,8月最低,11月最高,在季节上呈现夏季最低,秋季最高的特征。DN、DP月平均浓度分别为1.57 mg·L-1、0.09 mg·L-1,两者季节变化相似,均呈现冬春季高,夏秋季低的特点。Chl-a月平均浓度为4.48 μg·L-1,夏季最高,秋季最低,与DSi浓度的季节变化正好相反,且二者呈显著负相关。在空间上,位于南河断面的DSi、DN、DP浓度均大于其它断面,DSi可能少部分来自沉积物的分解释放,大部分通过地表径流的形式,由陆地向水体进行补充。DSi/DN全年均值为6.47,2月最低,11月最高。DN/DP在1月最低,7月最高,全年均值为47.76。研究结果表明汉丰湖浮游植物生长的主要限制因素是P元素。

Abstract: Clarifying the typical nutrient components of silicon (Si), nitrogen (N) and phosphorus (P) in water and their temporal and spatial changes of ecological stoichiometry is helpful to explore the degree of eutrophication and the limiting state of phytoplankton nutrition. In this study, seven sampling sites were set up in Hanfeng Lake of the Three Gorges Reservoir. The temporal and spatial variation characteristics of concentrations of soluble silicate (DSi), soluble total nitrogen (DN), soluble total phosphorus (DP), chlorophyll a (Chl-a) and other indicators were measured via sampling from May 2020 to April 2021. The phytoplankton nutrient restriction status in water was assessed through the establishment of ecological stoichiometry relationship of Si, N and P.The results showed that the monthly average concentration of DSi was 18.80 mg/L with the lowest value in August and the highest in November. At the seasonal scale, this value was the lowest in summer and the highest in autumn. The monthly mean concentrations of DN and DP were 1.57 mg/L and 0.09 mg/L, respectively. The seasonal variations of DN and DP were similar, with high concentrations in winter and spring and low concentrations in summer and autumn. The monthly average concentration of Chl-a was 4.48 μg/L, with the highest in summer and the lowest in autumn, showing an opposite to the seasonal variation of DSi concentration, and a significant negative correlation. In space, the concentrations of DSi, DN and DP in Nanhe section were all higher than those in other sections. A small part of DSi might come from the release of sediment decomposition, and a large part of DSI was supplemented from land to water body via surface runoff. The mean value of the ratio of DSi/DN for the whole year was 6.47, with the lowest value in February and the highest in November. The ratio of DN/DP was the lowest in January and the highest in July, with an annual average of 47.76. The results indicated that the main limiting factor of phytoplankton growth in Hanfeng Lake was element P.

No related articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] 王锐, 余涛, 杨忠芳, 侯青叶, 曾庆良, 马宏宏. 富硒土壤硒生物有效性及影响因素研究[J]. 长江流域资源与环境, 2018, 27(07): 1460 .
[2] 付书科, 李小帆, 彭甲超, 张子悦, 陈 思. 基于动态因子分析法的长江三角洲城市群城镇化质量测度研究[J]. 长江流域资源与环境, 2018, 27(09): 1909 -1918 .
[3] 张玉韩 吴尚昆 董延涛. 长江经济带矿产资源开发空间格局优化研究[J]. 长江流域资源与环境, , (): 0 .
[4] 李 述, 葛 刚, 刘琪璟.  

基于主体功能区规划的江西省城镇化协调发展研究 [J]. 长江流域资源与环境, 2018, 27(10): 2250 -2259 .

[5] 孔锋, 杨萍, 王品, 吕丽莉, 孙劭. 中国灾害性对流天气日数的时空变化特征[J]. 长江流域资源与环境, 2018, 27(11): 2518 -2528 .
[6] 刘冀, 孙周亮, 张特, 程雄, 董晓华, 谈新. 基于不同卫星降雨产品的澴水花园流域径流模拟比较研究[J]. 长江流域资源与环境, 2018, 27(11): 2558 -2567 .
[7] 查凯丽, 刘艳芳, 孔雪松, 田雅丝, 刘耀林, . 村镇路网通达性与空间出行研究——以武汉市李集镇为例[J]. 长江流域资源与环境, 2018, 27(12): 2663 -2672 .
[8] 起永东, 何明琼, 郑永宏, 高 洁, 王 丹, 孔繁希. 汉江流域降水结构时空特征及影响因素分析[J]. 长江流域资源与环境, 2018, 27(12): 2830 -2838 .
[9] 谢五三, 吴 蓉, 丁小俊. 基于FloodArea模型的城市内涝灾害风险评估与预警[J]. 长江流域资源与环境, 2018, 27(12): 2848 -2855 .
[10] 刘雁慧 李阳兵. 中国水资源承载力评价及变化研究[J]. 长江流域资源与环境, , (): 0 .