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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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uther compare the specise diversity of the different formations. such as Stipa klemenzii,S.krylovii,S.grandis and Leymus chinensis formation ,and the different degrative stage in each for-mation. It also calculates the diversity indices of Shannon information according to the richness,the date of dry weight and the importante valne of species. The results were as follows :1)Alongwith the formation chang of Stipa klemenzii→S.grandis → Leymus chinensis , thechang of the specise diversity have a trend gradually...

uther compare the specise diversity of the different formations. such as Stipa klemenzii,S.krylovii,S.grandis and Leymus chinensis formation ,and the different degrative stage in each for-mation. It also calculates the diversity indices of Shannon information according to the richness,the date of dry weight and the importante valne of species. The results were as follows :1)Alongwith the formation chang of Stipa klemenzii→S.grandis → Leymus chinensis , thechang of the specise diversity have a trend gradually increas. This is indentical with the water eco-logical of the formtions;2)Along with the different gradient stage in the formation,the changes ofthe species abundance distribution was ragular; 3)The diversity indices of information quantitiedby three index hed obvious changes law. It can be explained by “Intermediate Disturance Hypoth-esis”. Because diversity is the kurtosis function of disturance grandiant , the intermediate distu-rance resulted in maximum of diversity. The threshold value of grazing protection can be deter-mined by kurtosis function of diversity changes.

本文对小针茅(Stipaklemenzii)、克氏针茅(S.krylorii)、大针茅(S.grandis)、羊草(Leymuschinensis)群系,以及各群系内部不同退化状态的植物种多样性作了比较研究,分别以种的丰富度、干重值、重要值指标作了种的多度分布统计,又计算了不同群系及各群系内不同状态的Shannon信息多样性指数,结果表明:1)植物种多样性有随小针茅→克氏针茅→大针茅→羊草群系逐步增长的趋势,这与群系的水分生态状况是一致的;2)群系内随不同退化状态,种多度分布呈现出有规律的变化;3)三种指标所表达的信息多样性指数呈现出明显的变化规律,这种规律可用“中度干扰假设”(IntermediateDisturanceHypothesis)来解释,由于多样性是干扰梯度的峰形函数,所以中度干扰导致最大的多样性.由此可以根据多样性变化的峰形函数确定放牧保护的临界等级(阈值).

The ecological characteristics of water balance in plants were studied on Songnen grassland for four major grass communities, these were Leymus chinensis, Puccinellia tenuiflora, Puccinellia chinampoensis and Chloris virgata. A set of self-made lysimeters and a Campbell CR10 datalogger were employed in the study. The results showed that the diurnal variation in plant transpiration rate was characterised by a curve with twin peaks for all the four grass communities, but it varied significantly among them and...

The ecological characteristics of water balance in plants were studied on Songnen grassland for four major grass communities, these were Leymus chinensis, Puccinellia tenuiflora, Puccinellia chinampoensis and Chloris virgata. A set of self-made lysimeters and a Campbell CR10 datalogger were employed in the study. The results showed that the diurnal variation in plant transpiration rate was characterised by a curve with twin peaks for all the four grass communities, but it varied significantly among them and between different months. The most significant factor influencing the rate of transpiration was, among many others, solar radiation. All the three communities other than Chloris virgata suffered a serious water deficit in the growing season, with the most serious for Leymus chinensis. It is needed in planning a large-area plantation of these species to consider water deficit an important limiting factor.

采用自行设计的蒸散仪和CampbelCR10datalogger自动气象设备,研究了松嫩草原羊草、星星草、朝鲜碱茅和虎尾草4种主要禾草植物群落的水分生态状况。结果表明,在生长季晴天条件下,4种群落的蒸腾速率基本为双峰曲线,但同一时期各群落间及不同时期同一群落的蒸腾速率差异显著。在影响群落蒸腾速率的诸多因子中,太阳辐射强度为主导因子,其与群落蒸腾速率的相关关系最密切。在生长季,4种群落中只有虎尾草群落水分有盈余,其他3个群落均有严重的水分亏缺,其中以羊草群落的水分亏缺最多。严重水分亏缺将影响这些牧草的大面积种植。

In this paper We have studied The situation of grasslands and the trend of change in QiQiHar citi .we also meutioned some countermeasures ofvpreyeution and goremance. Key words: Ecology Grasslands Trond Counte'rmeasur'eessing$ CHANG Feng?jun 1,CHEN Shi?hong 2,YANG Feng 2 (1.School of Electronic and Information Engineering,Anshan Institute of I.& S.Technology,Anshan 114002,China; 2.Ailong Research Center of Electronic Engineering,Anshan Institute of I.& S.Technology,Anshan 114002,China)...

In this paper We have studied The situation of grasslands and the trend of change in QiQiHar citi .we also meutioned some countermeasures ofvpreyeution and goremance. Key words: Ecology Grasslands Trond Counte'rmeasur'eessing$ CHANG Feng?jun 1,CHEN Shi?hong 2,YANG Feng 2 (1.School of Electronic and Information Engineering,Anshan Institute of I.& S.Technology,Anshan 114002,China; 2.Ailong Research Center of Electronic Engineering,Anshan Institute of I.& S.Technology,Anshan 114002,China) Abstract:This paper discusses a method of the parameter assignment by utilizing fast?memory characteristic of the memory.This method provids the speed of controlled parameters only by limitaiton of the response time of RAM.The memory content is limitated by the digit capacity of RAM.The method has high?flexibility in the usage and high?widespread in the application.

本文研究了齐齐哈尔市草原生态状况、发展趋势 ,并提出防治对策

 
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