Song Yun-Long, Zhang Jin-Song, Guo Xiao-Ya, Zhu Jia, Wang Li, Tao Yi, Zhang Li
School of Civil and Environment Engineering, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, China.
Shandong Province Jiaodong Water Transfer Bureau, Ji'nan 250100, China.
Huan Jing Ke Xue. 2017 Aug 8;38(8):3302-3311. doi: 10.13227/j.hjkx.201701046.
The spatial-temporal characteristics of chlorophyll a concentration[(Chla)] were analyzed in Shiyan Reservoir, based on the monthly monitoring data from April 2013 to June 2014. The correlation between (Chla) and key environmental factors were also studied using correlation analysis and canonical correspondence analysis.The results showed that (TChla) was 9.59-123.29 μg·L, with an average of 52.03 μg·L. The (Chla) of cyanobacteria was 4.54-76.30 μg·L, with an average of 28.39 μg·L. The (Chla) of bacillariophyta was 3.16-46.09 μg·L, with an average of 15.02 μg·L. The (Chla) of chlorophyta was 0.77-26.2 μg·L, with an average of 8.62 μg·L. Cyanobacteria was the primary species from April to December in 2013 and May, June in 2014 while bacillariophyta was the primary species in other months. The spatial heterogeneity of (Chla) was unconspicuous and (Chla) decreased gradually from south to north. There was a risk of algal blooming for the whole reservoir during flood season and south part of reservoir in autumn. The storm runoff pollutant washout was the leading cause of the spatial heterogeneity of (Chla) in Shiyan Reservoir. Analysis revealed that water temperature was the most important driving factor for seasonal succession of phytoplankton. Significant correlation was found between (Chla) and surface runoff in flood season. TN:TP was negatively related to phytoplankton biomass and phosphorus was the restrictive factor for phytoplankton. Cyanophyta were affected water temperature, TOC, TN, pH, transparency, turbidity and NO-N. However silicate, TOC, NO-N, and COD were the main environmental factor of bacillariophyta while TOC, COD, pH, transparency and NO-N were the main factor of chlorophyta.
基于2013年4月至2014年6月的月度监测数据，对十堰水库叶绿素a浓度[（Chla）]的时空特征进行了分析。同时，运用相关性分析和典范对应分析研究了（Chla）与关键环境因子之间的相关性。结果表明，总叶绿素（TChla）为9.59 - 123.29μg·L，平均为52.03μg·L。蓝藻叶绿素a为4.54 - 76.30μg·L，平均为28.39μg·L。硅藻叶绿素a为3.16 - 46.09μg·L，平均为15.02μg·L。绿藻叶绿素a为0.77 - 26.2μg·L，平均为8.62μg·L。2013年4月至12月以及2014年5月、6月蓝藻为主要优势种，其他月份硅藻为主要优势种。（Chla）的空间异质性不明显，且（Chla）由南向北逐渐降低。汛期整个水库以及秋季水库南部存在藻类暴发风险。暴雨径流污染物冲刷是十堰水库（Chla）空间异质性的主要原因。分析表明，水温是浮游植物季节演替的最重要驱动因素。汛期（Chla）与地表径流之间存在显著相关性。总氮：总磷与浮游植物生物量呈负相关，磷是浮游植物的限制因子。蓝藻受水温、总有机碳、总氮、pH值、透明度、浊度和硝酸盐氮的影响。然而，硅酸盐、总有机碳、硝酸盐氮和化学需氧量是硅藻的主要环境因子，而总有机碳、化学需氧量、pH值、透明度和硝酸盐氮是绿藻的主要环境因子。
