氮和磷对铜山源水库优势藻生长影响实验研究

分别研究了N、P等对铜山源水库优势藻类（绿球藻和舟形硅藻）生长的影响。结果表明，当N／P比为25时，绿球藻生长量最高，其限制因子是磷。绿球藻生长最适pH范围为6－8，生长过程中培养基pH没有显著变化。绿球藻和舟形硅藻混合培养时，绿球藻占优，而硅盐浓度对硅藻生长有明显促进作用。     

固定化微生物技术及其在重金属废水处理中的应用

固定化微生物技术是一种有效的废水生物处理技术。较为全面地介绍了其定义、分类及载体选择。全面系统地介绍了固定化微生物（主要是菌类和藻类）技术近年来在重金属废水处理中的应用现状，分析认为，固定化微生物技术对于处理含各种重金属离子的废水均有很广阔的应用前景，并对今后的研究方向做了探讨。     

AN INTEGRATIVE APPROACH TOWARDS UNDERSTANDING ECOLOGICAL RESPONSES TO DAM REMOVAL: THE MANATAWNY CREEK STUDY1

ABSTRACT: Dam removal has been proposed as an effective method of river restoration, but few integrative studies have examined ecological responses to the removal of dams. In 1999, we initiated an interdisciplinary study to determine ecological responses to the removal of a 2 m high dam on lower Manatawny Creek in southeastern Pennsylvania. We used an integrative monitoring program to assess the physical, chemical, and biological responses to dam removal. Following removal in 2000, increased sediment transport has led to major changes in channel form in the former impoundment and downstream reaches. Water quality did not change markedly following removal, probably because of the impoundment's short hydraulic residence time (less than two hours at base flow) and infrequent temperature stratification. When the impoundment was converted to a free flowing reach, the composition of the benthic macroinvertebrate and fish assemblages in this portion of Manatawny Creek shifted dramatically from lentic to lotic taxa. Some fish species inhabiting the free flowing reach downstream from the dam were negatively affected by large scale sediment transport and habitat alteration following dam removal, but this appears to be a short term response. Based on our observations and experiences in this study, we provide a list of issues to evaluate when considering future dam removals.     

我国有害赤潮的灾害分级与时空分布

根据从文献获得的赤潮灾害基本信息的规范处理和分析，将我国的赤潮灾害划分为特大、重大、大型、中型和小型五个级别。结果表明，1933—2001年间我国赤潮灾害的发现次数为460次，赤潮灾害以小型为主，小于50km^2的占40．2％。赤潮灾害的发生范围已遍及我国沿海各省，其中辽东湾、长江口和杭州湾外侧的嵊泗列岛和花鸟山附近海域以及珠江口东侧及粤东近岸为我国三大赤潮多发区。近20a来，赤潮灾害的发现次数呈现上升趋势，为波动式增长，波动周期为3a左右，高峰持续时间越来越长。每次赤潮的平均面积即赤潮的规模呈现越来越大的趋势，平均面积已上升到500km^2左右。我国赤潮的高发期由南向北依次出现。南海的赤潮高发期为3—5月，东海的赤潮高发期为4—8月，渤海和黄海的赤潮高发期为5—9月。     

测定生产力中"叶绿泰a"的方法探讨

对测定生产力中"叶绿素a"的方法进行了探讨与改进,并进行了方法的验证.本方法的精密度范围为6.1%～8,4%,实验证明,本方法具有简单、快速、准确等特点.     

轻质除藻材料用于滇池水体的除藻效果初探

研究了轻质漂浮型除藻材料对滇池水样的净化效果，实验数据表明，加入除藻材料后，水样的pH值、TN、TP、CODMn、叶绿素a均有明显下降；初步探讨了该材料的除藻机理。结果表明，该材料是一种具有研究和应用价值的新型污染水体除藻材料。     

两种无机盐形成的盐度对淡水藻类生长的影响

利用水族箱微宇宙方法研究了2种无机盐所形成的盐度对淡水藻类生长和种类变化的影响.以景观鱼池水为试验水体,通过分别添加不同数量的NaCl和Na2SO4,各自设定4个盐度梯度,分别为3、6、9 g·L-1和12 g·L-1,考察藻类生长的变化情况.2种无机盐的试验结果均表明,在一定时期内较低盐度(不高于3 g·L-1)对藻类的生长略有促进,而过高的盐度(不低于6 g·L-1)对藻类生长有不同程度的抑制作用.对比两种盐对藻类生长的影响,发现Na2SO4形成的盐度对藻类生长的影响大于NaCl.盐度升高对试验水体中藻类的优势种影响不明显,高盐度胁迫使优势种端尖月牙藻(Selenastrum westii)的集群状态和生长发育受到较大影响.     

我国利用水生生物评价水质的研究进展

本文对国内学者利用藻类、浮游动物、底栖动物等水生生物评价水质的工作进行了综述,并就某些生物指数的应用进行了评估.     

星云湖隔河湖湾飘浮植物除藻技术研究

在星云湖隔河口湖湾围养20万m^2水葫芦去除蓝藻，经两年的研究结果表明：蓝藻去除率在80％以上，透明度提高到1．5—2m，河道沉水植物恢复良好，水质从劣Ⅴ类恢复到Ⅲ-Ⅳ类。     

Unusual uranium biomineralization induced by green algae: Behavior investigation and mechanism probe

As a biosorbent, algae are frequently used for the biotreatment or bioremediation of water contaminated by heavy metal or radionuclides. However, it is unclear that whether or not the biomineralization of these metal or radionuclides can be induced by algae in the process of bioremediation and what the mechanism is. In this work, Ankistrodsemus sp. has been used to treat the uranium-contaminated water, and more than 98% of uranium in the solution can be removed by the alga, when the initial uranium concentration ranges from 10 to 80 mg/L. Especially, an unusual phenomenon of algae-induced uranium biomineralization has been found in the process of uranium bioremediation and its mineralization mechanism has been explored by multiple approaches. It is worth noticing that the biomineralization of uranium induced by Ankistrodsemus sp. is significantly affected by contact time and pH. Uranium is captured rapidly on the cell surface via complexation with the carboxylate radical, amino and amide groups of the microalgae cells, which provides nucleation sites for the precipitation of insoluble minerals. Uranium stimulates Ankistrodsemus sp. to metabolize potassium ions (K⁺), which may endow algae with the ability to biomineralize uranium into the rose-like compreignacite (K₂[(UO₂)₆O₄(OH)₆]•8H₂O). As the time increased, the amorphous gradually converted into compreignacite crystals and a large number of crystals would expand over both inside and outside the cells. To the best of our knowledge, this is the first investigated microalgae with a time-dependent uranium biomineralization ability and superior tolerance to uranium. This work validates that Ankistrodsemus sp. is a promising alga for the treatment of uranium-contaminated wastewater.