A5102835737- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine and coastal ecosystems
- Marine Toxins and Detection Methods
- Microbial Community Ecology and Physiology
- Marine Biology and Ecology Research
- Fish Ecology and Management Studies
- Water Quality and Pollution Assessment
- Biocrusts and Microbial Ecology
- Aquatic Ecosystems and Biodiversity
- Constructed Wetlands for Wastewater Treatment
- Wetland Management and Conservation
- Soil and Water Nutrient Dynamics
- Isotope Analysis in Ecology
- Methane Hydrates and Related Phenomena
- Aquatic Invertebrate Ecology and Behavior
- Ocean Acidification Effects and Responses
- Orthoptera Research and Taxonomy
- Ecology and Vegetation Dynamics Studies
- Coastal wetland ecosystem dynamics
- Forest, Soil, and Plant Ecology in China
Jiangnan University
2012-2024
Jiangxi Academy of Sciences
2016
Nanjing Institute of Geography and Limnology
2008-2012
Chinese Academy of Sciences
2008-2012
Ningxia University
2008
Lake Taihu is a large shallow eutrophic lake with frequent recurrence of cyanobacterial bloom which has high variable distribution in space and time. Based on the field observations remote sensing monitoring occurrence, conjunction laboratory controlled experiments mixing effects colony formation colonies upward moving velocity measurements, it found that small or moderate wind-induced disturbance would increase size enable more easily to overcome float water surface rapidly during...
Eutrophication of lakes and harmful algae blooms are recently widespread water ecological environmental issues all over the world. Lake Taihu is a typical large shallow eutrophic lake, cyanobacteria induced by eutrophication have always been presenting high spatial-temporal variability instability that made it very difficult to monitor predict. Many previous publications related bloom with most attention paid phytoplankton growth, biomass increase dominant species, while few works addressed...
Mixing is an integral environmental factor that affects lake ecosystems. For the cyanobacterium Microcystis , colony size important with respects to migration velocity, how cells respond grazing pressure, light attenuation, nutrient uptake and growth. To understand mixing shapes growth of we measured effects different current velocities (0, 0.16, 0.32, 0.64, 1.28 m s −1 ) on M. aeruginosa in Lake Taihu. After 24 h continuous mixing, mean sizes controls, groups were 23.6, 50.1, 92.9, 67.8,...
氮是引起湖泊富营养化的关键要素之一.传统观点认为氮缺乏时,湖泊生态系统可以通过生物固氮作用从大气中获取氮来满足自身的需求,因此认为淡水湖泊水体的生产力主要受磷限制.但随着进一步的研究,发现氮限制与氮和磷共同限制更为普遍,且氮的限制常常伴随着水体的富营养化,因此了解富营养化湖泊水体的氮素污染状况具有重要意义.本文介绍了太湖水体氮素的污染状况及其发展趋势,从外源、内源两大方面介绍了太湖水体中氮素的来源,着重分析和比较了河道输入、大气输入以及沉积物释放不同污染源的输入比例.太湖水体氮素污染存在很大的空间差异,其中西部和北部污染较重而东南部相对较轻,入湖河道输入的外源污染是造成太湖水质空间分布差异的主要原因,其中农业面源污染及生活污染在太湖外源污染中占据了相当的比重;湖泊底泥所造成的内源释放也是氮素污染的一个重要原因,但目前对释放量的估算主要是基于底泥悬浮引起的总量估算,关于这些释放量能有多少比例可以被浮游植物利用还不清楚,尤其是有机颗粒物在水体中停留期间的矿化再生值得进一步研究;在氮素的生物转化过程中,生物固氮目前对太湖氮素输入的贡献很小,反硝化作用是太湖水体氮素自净的主要途径.;Ex...
To improve the quality of natural seawater to meet needs aquaculture production, a large-scale subsurface-flow constructed wetland (HSFCW) was and operated stably for 2 years understand reasons its purification effect on seawater. The results study showed that system could maintain high during aquaculture; average removal rates COD, TSS, TN, NH4+-N, DON (organic nitrogen) were 22.29%, 49.33%, 36.94%, 10.88%, 44.08%, respectively. Additionally, HSFCW effectively remove harmful algae such as...
Water quality problems in the Xiaowan Reservoir due to a recently built dam of upper Mekong River have became major ecological and economic concerns. The main goal this work was thus describe present water metazooplankton dynamics evaluate effects damming on aquatic ecosystem super reservoir. including conductivity, turbidity, Chlorophyll a, dissolved oxygen, total nitrogen, phosphorus communities were surveyed along 30 km away from reservoir 2011 2012. Throughout our study, most parameters...
2012年3月至2013年2月逐月对太湖水体叶绿素a含量、主要环境因子及不同门类浮游植物密度进行测定,分析太湖叶绿素a含量和不同门类浮游植物密度的时空分布特征,探讨太湖叶绿素a含量和环境因子与不同门类浮游植物密度之间的相关关系并建立逐步回归方程.结果表明:太湖叶绿素a含量全年平均值为22.33±37.65 mg/m<sup>3</sup>,变幅为0.48~347.85...
Wind-wave disturbance and nutrient input are the major environmental factors that shape bacterial diversity community composition in lakes. However, knowledge of bacteria as bio-indicators' synergistic response to patterns addition is still poor. To address this gap, we conducted a mesocosm experiment over 21 days, collected 90 water samples from tanks under six different addition; explored communities using high-throughput 16S rRNA gene sequencing. We found significantly increased...
大量微囊藻群体的形成和聚集是微囊藻水华形成的重要条件.氮、磷浓度是影响微囊藻群体生长的重要因素之一.为了探讨氮、磷浓度对微囊藻群体生长的影响,本研究以太湖微囊藻水华优势种之一的水华微囊藻作为研究对象,开展了不同氮、磷浓度对水华微囊藻群体生长的影响研究.以近几年太湖微囊藻水华暴发最严重的梅梁湾氮磷比的平均值作参考,氮、磷浓度设置为5个水平组,依次是T1(TN=0.1 mg/L,TP=0.005 mg/L)、T2(TN=1 mg/L,TP=0.05 mg/L)、T3(TN=10 mg/L,TP=0.5 mg/L)、T4(TN=100 mg/L,TP=5 mg/L)和T5(TN=250 mg/L,TP=5.44 mg/L)(BG-11培养基中氮、磷的浓度).结果显示,T1、T2、T3和T4 4组微囊藻群体均增大,且都发现有大于100个细胞的群体形成,群体大小分别为151、217、437和160...
风浪扰动是影响湖泊生态系统重要的环境因素之一.为了解风浪扰动对湖泊微囊藻群体大小的影响，在野外模拟了风浪扰动对太湖微囊藻群体大小的影响.结果表明，实验组模拟风浪连续扰动24 h，扰动结束时实验组和对照组微囊藻群体大小分别为68.38和12.56 μm，实验组和对照组微囊藻群体大小呈极显著差异；扰动结束时实验组和对照组微囊藻胞外多糖含量分别为1.49×10<sup>-6</sup>和1.26×10<sup>-6</sup> mg/cell，二者差异显著.表明适当强度的风浪扰动短时间内能促使微囊藻群体显著增大，有助于人们对太湖微囊藻水华暴发机理的认识.;Mixing induced by wind-wave is one of the important factors in lake ecosystems. To understand effects mixing on colony size Microcystis lake, an in-situ experiment was conducted Lake Taihu. The results showed that...
风浪扰动是影响湖泊生态系统的重要环境因素之一.为了解扰动方式对微囊藻群体大小的影响，在实验室可控条件下，模拟不同扰动方式（持续扰动和间歇扰动）对太湖水华微囊藻（Microcystis flos-aquae）群体大小的影响.结果显示，间歇扰动组水华微囊藻群体从35.09 μm迅速增大至43.73 μm，实验第17天时为59.00 μm；而持续扰动组水华微囊藻群体大小先从35.07 μm增大到43.51 μm，实验第17天时减小至13.95 μm；不扰动组整个实验期间群体大小相对稳定，实验初为35.38 μm，实验第17天时为33.67 μm.方差分析显示，间歇扰动组群体大小显著大于持续扰动组和不扰动组，持续扰动组显著小于不扰动组.实验第17天时间歇扰动组藻细胞密度（1.675×10<sup>6</sup> cells/ml）显著高于持续扰动组（0.344×10<sup>6</sup> cells/ml）和不扰动组（1.461×10<sup>6</sup>...
大量微囊藻群体的形成和聚集是微囊藻水华形成的重要条件.光照强度是影响微囊藻生长的重要因素之一.为了了解光照强度对水华微囊藻(Microcystis flos-aquae)群体大小增长的影响,以太湖微囊藻水华优势种之一的水华微囊藻作为研究对象,开展了不同光照强度对水华微囊藻群体大小增长的影响研究.共设置5个不同光强处理组,依次为G1:2000 lx;G2:4000 lx;G3:8000 lx;G4:16000 lx;G5:变化光照强度(模拟野外光强).实验期间,G1~G5组大于100细胞群体的平均大小分别为255、480、630、763和662 cells/群体.胞外多糖含量分析显示水华微囊藻形成的群体越大,胞外多糖含量越高.结果表明,低光照强度不利于太湖水华微囊藻群体大小的增长,而变化光照强度和高光照强度有利于水华微囊藻群体大小的增长.研究结果解释了太湖夏季野外变化光照强度和高光照强度有利于微囊藻水华形成的原因.;The formation and accumulation of massive Microcystis colonies was an important...