State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Sciences, Chinese Academy of Sciences, Nanjing 210008, China.
Bioresour Technol. 2010 Jun;101(11):3903-8. doi: 10.1016/j.biortech.2009.12.144. Epub 2010 Feb 4.
Harmful cyanobacterial bloom in water bodies frequently occurs due to eutrophication, leading to the excessive growth of cyanobacteria which in turn may lead to a decrease in biodiversity. A biopond-wetland system to control cyanobacterial bloom and stabilize or even increase biodiversity is proposed and applied in a pond, Kunming, western China where cyanobacterial blooms frequently break out. The biopond-wetland system examined includes three main parts: filter-feeding fish, replanted pond macrophytes, and a terminal artificial wetland. When the hydraulic load of the biopond-wetland system was 500m(3)/d on non-rainy days, the system successfully decreased the level of chlorophyll-a (Chl-a). The declining levels of total nitrogen (TN), total phosphorus (TP) and ammonia in the water after establishing the biopond-wetland system also coincided with the disappearance of the cyanobacterial bloom. In the second summer, when the biopond-wetland system was in a relatively steady-state condition, the overall average nutrient removal efficiencies were as follows, Chl-a (83%), TN (57%), TP (70%) and ammonia (66%), while in the second winter, the overall average removal efficiencies were Chl-a (66%), TN (40%), TP (53%) and ammonia (49%). Simpson's diversity index of zoobenthos indicated that the system increased the zoobenthic diversity and improved the growth conditions of the zoobenthos habitat. The results demonstrated that the biopond-wetland system could control cyanobacterial blooms.
水体富营养化经常导致有害的蓝藻水华，导致蓝藻过度生长，进而可能导致生物多样性减少。提出并应用了一种生物塘-湿地系统来控制蓝藻水华并稳定甚至增加生物多样性，该系统在中国西部昆明的一个池塘中得到了检验，该池塘经常爆发蓝藻水华。生物塘-湿地系统包括三个主要部分：滤食性鱼类、重新种植的池塘水生植物和末端人工湿地。当生物塘-湿地系统的水力负荷为 500m³/d 时（非雨天），系统成功降低了叶绿素-a（Chl-a）水平。建立生物塘-湿地系统后，水中总氮（TN）、总磷（TP）和氨的含量下降也与蓝藻水华的消失相一致。在第二个夏季，当生物塘-湿地系统处于相对稳定状态时，总平均营养去除效率如下，Chl-a（83%）、TN（57%）、TP（70%）和氨（66%），而在第二个冬季，总平均去除效率为 Chl-a（66%）、TN（40%）、TP（53%）和氨（49%）。底栖动物 Simpson 多样性指数表明，该系统增加了底栖动物的多样性，改善了底栖动物栖息地的生长条件。结果表明，生物塘-湿地系统可以控制蓝藻水华。
