海水循环水养殖系统是重要的生态养殖模式发展趋势之一,为了深入了解循环水养殖生态系统,通过对系统各功能区水体中细菌16S r DNA基因V4—V5区进行高通量测序和生物信息学分析,从微生物生态学角度分析了循环水养殖系统不同功能区的细菌...海水循环水养殖系统是重要的生态养殖模式发展趋势之一,为了深入了解循环水养殖生态系统,通过对系统各功能区水体中细菌16S r DNA基因V4—V5区进行高通量测序和生物信息学分析,从微生物生态学角度分析了循环水养殖系统不同功能区的细菌群落结构动态。测序分析结果显示,海水循环水养殖系统中优势细菌种群分别属于变形菌门(Proteobacteria)、蓝藻门(Cyanobacteria)、拟杆菌门(Bacteroidetes)、厚壁菌门(Firmicutes)、放线菌门(Actinobacteria)和浮霉菌门(Planctomycetes)。红树林湿地水体中变形菌门和厚壁菌门丰度较高,而对虾养殖池的拟杆菌门和浮霉菌门丰度较高。在不同优势类群中,变形菌门多样性指数平均值最高,其次是拟杆菌门,厚壁菌门最低。在各功能区中,红树林细菌多样性最高,虾池最低。MDS分析结果显示虾池、贝池和红树林湿地水体中细菌群落结构有明显差异,虾池与其他功能区差异最大。研究表明,高密度对虾养殖对虾池水体中细菌群落有显著影响,但其影响在循环水养殖系统后续功能区中逐渐减弱。展开更多
Mangrove forests provide valuable societal and ecological services and goods. However, they have been experiencing high annual rates of loss in many parts of the world. In order to evaluate a long-term wetland conserv...Mangrove forests provide valuable societal and ecological services and goods. However, they have been experiencing high annual rates of loss in many parts of the world. In order to evaluate a long-term wetland conservation strategy that compromises urban development with comprehensive wetland ecosystem management, remote sensing techniques were used to analyze the changing mangrove distribution in the Zhanjiang Mangrove Forest National Nature Reserve. Between 1991 and 2000, the mangrove area within the study region declined from 2 264.9 to 2 085.9 ha consistent with an annual decrease of 0.79%. However, there was an overall 34.3% increase in mangrove coverage from 2 085.9 to 2 801.8 ha between 2000 and 2011. Major causes of forest loss include local human pressures in the form of deforestation, conversion to agriculture, and natural forces such as erosion. The recent gain in mangrove forest cover is attributed to eff ective conservation management in the nature reserve area, including intensive mangrove plantation eff orts and increased local awareness of wetland conservation.展开更多
文摘海水循环水养殖系统是重要的生态养殖模式发展趋势之一,为了深入了解循环水养殖生态系统,通过对系统各功能区水体中细菌16S r DNA基因V4—V5区进行高通量测序和生物信息学分析,从微生物生态学角度分析了循环水养殖系统不同功能区的细菌群落结构动态。测序分析结果显示,海水循环水养殖系统中优势细菌种群分别属于变形菌门(Proteobacteria)、蓝藻门(Cyanobacteria)、拟杆菌门(Bacteroidetes)、厚壁菌门(Firmicutes)、放线菌门(Actinobacteria)和浮霉菌门(Planctomycetes)。红树林湿地水体中变形菌门和厚壁菌门丰度较高,而对虾养殖池的拟杆菌门和浮霉菌门丰度较高。在不同优势类群中,变形菌门多样性指数平均值最高,其次是拟杆菌门,厚壁菌门最低。在各功能区中,红树林细菌多样性最高,虾池最低。MDS分析结果显示虾池、贝池和红树林湿地水体中细菌群落结构有明显差异,虾池与其他功能区差异最大。研究表明,高密度对虾养殖对虾池水体中细菌群落有显著影响,但其影响在循环水养殖系统后续功能区中逐渐减弱。
基金Supported by the National Natural Science Foundation of China(No.41340049)the Guangdong Province Science and Technology Plan Project(No.2016A020222016)+1 种基金the Innovation and Strong School Project of Guangdong Ocean University(No.Q16147)the Natural Science Foundation of Guangdong Province(No.2016A030313754)
文摘Mangrove forests provide valuable societal and ecological services and goods. However, they have been experiencing high annual rates of loss in many parts of the world. In order to evaluate a long-term wetland conservation strategy that compromises urban development with comprehensive wetland ecosystem management, remote sensing techniques were used to analyze the changing mangrove distribution in the Zhanjiang Mangrove Forest National Nature Reserve. Between 1991 and 2000, the mangrove area within the study region declined from 2 264.9 to 2 085.9 ha consistent with an annual decrease of 0.79%. However, there was an overall 34.3% increase in mangrove coverage from 2 085.9 to 2 801.8 ha between 2000 and 2011. Major causes of forest loss include local human pressures in the form of deforestation, conversion to agriculture, and natural forces such as erosion. The recent gain in mangrove forest cover is attributed to eff ective conservation management in the nature reserve area, including intensive mangrove plantation eff orts and increased local awareness of wetland conservation.
