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  ecological conditions
The change of edificatory tree species was followed by changes in the ecological conditions and, as a consequence, in the species composition, abundance, and cenotic significance of vegetation.
      
This effect is considered as an index of the influence of ecological conditions on the shell growth and formation.
      
The dependence of the effect of polymorphism at the studied loci on ecological conditions is discussed.
      
Ecological conditions were assessed in the zone of river and sea water mixing in the northern Caspian Sea regions exposed to high anthropogenic pressure.
      
This effect is enhanced by changes in ecological conditions that occur upon defoliation.
      
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  ecological situation
Long-Term Monitoring of the Ecological Situation in Industrial Sites of Moscow with aDrosophila melanogaster Test Strain
      
The total infestation of shells of the Japanese scallop by boring polychaetes and the depressed condition of most mollusks and algae evidenced the unfavorable ecological situation in the area surveyed.
      
This paper analyzes the ecological situation in Chazhma Bay and presents a list of arrowworms species found there with descriptions and drawings of the new species and a list of morphological deviations registered in all species of arrowworms.
      
This paper analyzes the ecological situation in Chazhma Bay and presents a list of arrowworms species found there with descriptions and drawings of the new species and a list of morphological deviations registered in all species of arrowworms.
      
Based on the mathematical models, more accurate data on the initial ecological situation in the lake in the year of the accident have been obtained.
      
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  ecological status
Inobservance of ecologically tolerable levels degrades ecological status of the ecosystems manifested as deviation from normal saprobic indices of phytoplankton, zooplankton, and periphyton as well as biotic indices of zoobenthos.
      
Variation in Ecological Status of Norwegian Sea Water Determined from Hydrolytic Enzyme Activities
      
Criteria and methods to assess the ecological status of soils in relation to the landscaping of urban territories
      
The ecological status and functioning of soils in urban ecosystems are considered.
      
At the same time, the total number of fungi (in colony-forming units) and the indices of the richness of individual species and genera proved to be poorly informative for assessing the ecological status of the soils.
      
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Zooplankton investigation and water quality evaluation were carried out in Jingmi Canal and Beijing Sewage Stream in various seasons during 1982 -1984. The water quality of 18 sampling stations were categorized into 5 levels according to the changes in community structure and diversity index. In the upper stations of Jingmi Canal, the fundamental characteristics of the water bodies were clear species, low quantity and high diversity index value, so the water quality in these sections may be classified as level...

Zooplankton investigation and water quality evaluation were carried out in Jingmi Canal and Beijing Sewage Stream in various seasons during 1982 -1984. The water quality of 18 sampling stations were categorized into 5 levels according to the changes in community structure and diversity index. In the upper stations of Jingmi Canal, the fundamental characteristics of the water bodies were clear species, low quantity and high diversity index value, so the water quality in these sections may be classified as level 1-2, In the lower reaches of the canal where the bodies of water were heavily polluted by wastewater from urban districts, the diversity index values evidently declined with the decrease in species number and the increase in quantity of tolerance species, so the water quality may be of level 4-5. The water quality in the lower waters of Beijing Sewage Stream showed obvious improvement and they belong in level 3 due to self-purification.

1982—1984年对京密运河-北京排污河进行了不同季节的浮游动物生态状况调查.按照浮游动物不同时间和空间群落结构的变化,对河流水质进行生物学评价,将河流水质划分成五个等级.根据浮游动物的种类组成、数量分布特征及河流的水质状况筛选出作为京密运河及北京排污河水质污染及变化趋势的指示种类.

Based on the review of evolution of ecological environment in the hilly red soil area in Southeastern China,the main causes of the vulnerable eco-environment in this area are analysed,and the comprehensive measures includingecological, economic and social approaches are put forward of the control of the vulnerable eco-environment.

通过对我国东南部红壤丘陵区生态状况的历史回顾,分析了该区脆弱生态环境形成的主要原因,提出其整治应采取的生态、经济、社会诸方面的综合措施。

This paper expoundes the problems of the environment and development in China from four aspects. The crux for the improvement of the ecological condition in China is to foster the ecological moral idea, change the appearance of the impoverished regions and reside the environmental protection in development.

本文从四个方面阐述了中国的环境与发展问题。要改善中国目前生态状况的关键在于树立生态道德观念,扭转贫困地区的面貌,寓资源环境保护于发展之中。

 
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