阿哈水库叶绿素a时空分布特征及其与藻类、环境因子的关系

发布时间：2018-04-20 15:43

本文选题：叶绿素a + 时空分布　；参考：《环境科学》2017年10期

【摘要】：为了解阿哈水库叶绿素a(Chl-a)时空分布特征及其与藻类、环境因子的关系,于2012年枯水期至2013年平水期、丰水期对藻类与理化指标进行分层采样.结果表明Chl-a季节变化明显,与藻类生物量季节变化较为一致,而与丰度差别较大,平水期发生甲藻水华,浓度最高(91μg·L~(-1)),枯水期与丰水期相对较低,分别为8μg·L~(-1)与16μg·L~(-1).枯水期与丰水期水体表层Chl-a浓度略高于中、底层,表层光照、溶解氧相对充足,利于藻类生长;平水期表层Chl-a浓度远高于中、底层,易在表层聚集的甲藻水华是主要原因.大坝Chl-a浓度高于库中,这可能是大坝位于金钟河入库口,营养盐高于库中的缘故.相关性分析得出Chl-a与甲藻门呈极显著正相关(R=0.798,P0.01);Chl-a与TP、DO、pH呈极显著正相关(R=0.762,P0.01;R=0.792,P0.01;R=0.658,P0.01),与TN显著正相关(R=0.388,P0.05)与N/P、NO_3~--N显著负相关(R=-0.37,P0.05;R=-0.435,P0.05).逐步回归分析得出DO、TP、N/P为影响阿哈水库Chl-a分布的主要因子.此外热分层以及水温对Chl-a的影响也不容忽视.
[Abstract]:In order to understand the spatial and temporal distribution characteristics of chlorophyll a (Chl-a) in the Aha Reservoir and its relationship with algae and environmental factors, in the dry period of 2012 to 2013, the algae and the physicochemical indexes were stratified by stratified sampling. The results showed that the seasonal variation of Chl-a was obvious, and the seasonal variation of algae biomass was more consistent, but the difference was greater between the abundance and the abundance. The concentration of alga blooms was the highest (91 g / L~ (-1)), the dry period and the abundant water period were relatively low, which were 8 g. L~ (-1) and 16 mu g. L~ (-1). The Chl-a concentration of the surface layer of water body was slightly higher than that of the middle, the bottom, the surface light and the dissolved oxygen were relatively sufficient for the growth of algae, and the Chl-a concentration in the surface layer was far higher than that in the middle, the bottom layer and the surface accumulation. The main reason for the alga blooms in the collection is that the concentration of Chl-a in the dam is higher than that in the reservoir. This may be the reason that the dam is located at the entrance of the Jin Zhong River and the nutrients are higher than that in the reservoir. The correlation analysis shows that Chl-a is very significant positive correlation with the gate of the algal alga (R=0.798, P0.01), and Chl-a is positively correlated with TP, DO and pH (R=0.762, P0.01; R=0.792, P0.01; pH). The significant positive correlation (R=0.388, P0.05) is significantly negatively correlated with N/P and NO_3~--N (R=-0.37, P0.05; R=-0.435, P0.05). The stepwise regression analysis shows that DO, TP, N/P are the main factors affecting the Chl-a distribution of the Aha Reservoir.

【作者单位】：贵州师范大学地理与环境科学学院;贵州师范大学贵州省山地环境信息系统和生态环境保护重点实验室;贵州医科大学公共卫生学院;
【基金】：国家自然科学基金项目(U1612442,41263011) 贵州省水利厅项目(KT201401) 白云区科技局项目([2014]67,70)
【分类号】：X524

【相似文献】