The Advance of Protozoa as the Model Animal in the Environment

2013 ◽  
Vol 411-414 ◽  
pp. 3258-3260
Author(s):  
Xiu Ming Cao ◽  
Shuo Zhang ◽  
Shan Shan Wang

With the development of modern industry, the problem of environment pollution becomes more and more serious. It has become an important issue to conduct the environment monitoring rapidly and effective. Fish, alga, higher aquatic plants and benthic macro-invertebrate are always used in the environment monitoring. In recent years, protozoa are widely applied to the monitor of soil environment pollution and water pollution. Protozoa are the most original and the lowest unicellular animals, and they play an important role as the predator and primary consumer in the energy flow and circulation of materials. Protozoa become an ideal model animal in the process of assessing the quality change.

2008 ◽  
Vol 44 (1) ◽  
pp. 48-59
Author(s):  
P. D. Klochenko ◽  
G. V. Kharchenko ◽  
V. G. Klenus ◽  
A. Ye. Kaglyan ◽  
T. F. Shevchenko

2020 ◽  
Vol 198 ◽  
pp. 04025
Author(s):  
Xiaolun Zhang ◽  
Yanyan Shao

Basin ecological environment and water quality are seriously threatened by development around the lake. The thesis intends to assess basin Land Use and land Cover Changes (here after abbreviated as LUCC) impact on water quality change in Xingyun Lake basin. To achieve this purpose, land use information was interpreted from six periods high-resolution images in the past 30 years, which were classified into seven land use types. The water quality data was obtained by investigation and collection. SPSS software was used to celebrate the correlation coefficient between water quality and LUCC. The results revealed that, in the study area construction land, transportation land and farm land were underwent an increase with the region development; grassland and bare land were gradually reduced, forest land had become fragmented. In addition, the water pollution index gradually increased since 2000, the water deteriorated significantly. Furthermore, there was a strong positive correlation between water pollution indicator and farmland, construction land and transportation land, which indicated that the deterioration of water quality may be the result of the combined effects of agriculture non-point source pollution, domestic and industrial pollution; there was a significant negative correlation between water pollution indicator and grassland and bare land, which indicated that permeable underlying mat had significant interception and absorption effects on pollutants.


2020 ◽  
Vol 168 ◽  
pp. 00061
Author(s):  
Yevhen Semenenko ◽  
Tetіana Demchenko ◽  
Artyom Pavlichenko

The analysis of the possible maximum fluid flow rates when using higher aquatic plants for clarification of recycled water in the pondclarifier of the tailing pond has carried out. The study has been performed on the basis of a mathematical model of a plane slow stationary gravity flow of a viscous fluid in two parallel layers. The results of the study made it possible to determine the fluid velocity through a layer of higher aquatic plants floating on a free surface. The maximum possible velocity depending on the layer porosity has been determined. This value is necessary to determine the rational parameters of the process of clarifying technical recycled water from particles of the given hydraulic size, taking into account the pond-clarifier geometric dimensions. It is shown that the velocity in the layer with higher aquatic plants has been determined by the ratio of two parameters of this layer - porosity and dimensionless resistance coefficient. It has been shown that the maximum velocity value coefficient in the layer with plants floating on free surface depends only on porosity of this layer and does not depend on its resistance coefficient.


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