[Characterization of Reductive Dechlorination of Chlorinated Ethylenes by Anaerobic Consortium].

Tetrachloroethylene （PCE） and trichloroethylene （TCE） are typical volatile halogenated organic compounds in groundwater that pose serious threats to the ecological environment and human health. To obtain an anaerobic microbial consortium capable of efficiently dechlorinating PCE and TCE to a non-toxic end product and to explore its potential in treating contaminated groundwater， an anaerobic microbial consortium W-1 that completely dechlorinated PCE and TCE to ethylene was obtained by repeatedly feeding PCE or TCE into the contaminated groundwater collected from an industrial site. The dechlorination rates of PCE and TCE were （120.

Rhizobium flavescens sp. nov., Isolated from a Chlorothalonil-Contaminated Soil.

A Gram-negative, facultative anaerobic, non-lagellated and rod-shaped bacterium FML-4 was isolated from a chlorothalonil-contaminated soil in Nanjing, China. Phylogenetic analyses of 16S rRNA genes revealed that the strain FML-4 shared the highest sequence similarity of 97.1% with Ciceribacter thiooxidans KCTC 52231, followed by Rhizobium rosettiformans CCM 7583 (97.

Enantioselective Catabolism of the Two Enantiomers of the Phenoxyalkanoic Acid Herbicide Dichlorprop by sp. DBS4.

Dichlorprop [()-2-(2,4-dichlorophenoxy)propanoic acid; DCPP], an important phenoxyalkanoic acid herbicide (PAAH), is extensively used in the form of racemic mixtures (-DCPP), and the environmental fates of both DCPP enantiomers [()-DCPP and ()-DCPP] mediated by microorganisms are of great concern. In this study, a bacterial strain sp. DBS4 was isolated from contaminated soil and was capable of utilizing both ()-DCPP and ()-DCPP as the sole carbon source for growth.

[Relationship Between the Vegetation Community and Soil Nutrient and Enzyme Activity During the Restoration of Abandoned Land in the Loess Hilly Region].

The trends of and relationships among the plant community, soil nutrients, and four soil enzymes were investigated after being abandoned for 10, 15, 20, 30, and 45 years to reveal the soil properties during the restoration in the Loess Hilly Region. The results indicate the following ranking of dominant plant community species:→+→+irons →+. The ranking reflects an increase along the chronosequence of abandoned land.

[Population spatial patterns of grassland plant communities in different slope aspects in the loess hilly area, China.].

We investigated the species composition and diversity of four grassland communities with different slope aspects in the loess hilly area of China. The power law was used to analyze spatial heterogeneity of the community and spatial pattern of the population. The results showed that Artemisia sacrorum was the dominant species and occurred in each site.