Wang Meng-Meng, Zhang Wei, Zhang Jun-Yi, Shang Guang-Xia, Du Cai-Li, Wang Li-Qing
Centre for Research on Environmental Ecology and Fish Nutrient(CREEFN) of the Ministry of Agriculture, Shanghai Ocean University, Shanghai 201306, China.
Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China.
Huan Jing Ke Xue. 2018 Jun 8;39(6):2698-2705. doi: 10.13227/j.hjkx.201711020.
An in-situ mesocosm experiment was conducted to study the growth dynamic of and the other phytoplankton organisms under accelerated eutrophication conditions by using 39 buckets (100 L) in Lake Dishui, Shanghai. The results showed that the growth of both filamentous cyanobacteria () and green algae were promoted with nutrient enrichment. The increase in the algal biomass rate in N plus P addition treatments was significantly higher than in treatments with N or P alone (<0.05). Although the increasing biomass rate with P addition alone was higher than with N alone, there was no statistically significant difference (0.05). The relevant abundance of showed a significantly decreasing trend with N addition treatments and N plus P additions treatments (<0.05), although it was slightly increased with the treatments with P alone (0.05). Nutrient addition could significantly improve the growth of small sized algae organisms ( spp., spp., spp., spp., and spp.) rather than in all treatments (<0.05). The small sized green algae overcoming indicated that small sized algae were more favored by hyper-eutrophicated, high water temperature and relatively undisturbed conditions. This is because small sized algal organisms have higher metabolic and growth rates compared to other sized algae, especially in stationary water regimens and high, light density conditions. We foresee that the small sized algae, Chlorophyte, dominating the small hyper-eutrophic aquatic system may be a potential succession pattern in the high water temperature seasons.
在上海滴水湖，利用39个100升的水桶进行了原位中宇宙实验，以研究在加速富营养化条件下丝状蓝藻和其他浮游植物生物的生长动态。结果表明，随着营养物质的富集，丝状蓝藻和绿藻的生长均得到促进。氮磷添加处理中藻类生物量增加率显著高于单独添加氮或磷的处理（P<0.05）。虽然单独添加磷时生物量增加率高于单独添加氮，但差异无统计学意义（P>0.05）。丝状蓝藻的相关丰度在添加氮处理和氮磷添加处理中呈显著下降趋势（P<0.05），尽管在单独添加磷的处理中略有增加（P>0.05）。在所有处理中，添加营养物质可显著促进小型藻类生物（小球藻属、衣藻属、栅藻属、微囊藻属和颤藻属）的生长，而不是丝状蓝藻（P<0.05）。小型绿藻胜过丝状蓝藻表明，小型藻类更受高度富营养化、高水温及相对未受干扰条件的青睐。这是因为与其他大小的藻类相比，小型藻类生物具有更高的代谢和生长速率，尤其是在静水状态和高光密度条件下。我们预测，在高温季节，小型藻类（绿藻门）主导小型高度富营养化水生系统可能是一种潜在的演替模式。
