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Impacts of methamidophos,copper,and their combinations on bacterial community structure and function in black soil

Science China(Life Sciences) 2005年第z1期48卷 14-25页

作者： ZHANG Huiwen ZHOU Qixing ZHANG Qianru ZHANG Chenggang Key laboratory of terrestrial Ecological Process Institute of Applied EcologyChinese Academy of ScienceShenyang 110016China

The potential ecotoxicologial risks of methamidophos,copper,and their combinations on microbial community of black soil ecosystem in the Northeast China were assessed in species richness and structures by using 16S rDNA-PCR-DGGE analysis approach,and functional characteristics at community levels by using BIOLOG^(GN) system analysis method as well as two conventional methods(DHA and SIR).All results of DGGE banding fingerprint patterns(amplified by bacterial specific 16S rDNA V_(3) high variable region universal primer)indicated that the species richness of bacterial community in tested soil was significantly decreased to different extents by using different concentrations of single methamidophos,copper,especially some of their combinations had worse effects than their corresponding single *** addition,the structures of soil bacterial community had been disturbed under all stresses applied in this study because of the enrichment of some species and the disappearance of other species from the bacterial *** effects of the single factors with lower concentrations on the communiy structure were weaker than those with higher ***,the bacterial community structures under the combined stresses of methamidophos and copper were significantly different from those of control and their corresponding single *** change of DHA and carbon source substrate utilizing fingerprint patterns based on BIOLOG^(GN)system were two relatively sensitive directors corresponding to the stress presented in this *** methamodophos and copper,there happened the significant joint-toxic actions when they were used in combination on DHA and carbon source substrate utilizing fingerprint patterns of soil bacterial *** DHA of soil under the combined stresses was lower than that of the control and that under the single factors,and the BIOLOG^(GN) substrate utilizing patterns of soil treated by combinations were distinctively differentiated f

关键词： and their combinations on bacterial community structure and function in black soil Impacts of methamidophos copper

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Effect of heavy metals on soil nematode communities in the vicinity of a metallurgical factory

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Journal of Environmental Sciences 2006年第2期18卷 323-328页

作者： LI Qi JIANG Yong LIANG Wen-ju Key laboratory of terrestrial Ecological Process Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

The influence of Cu and Zn on soil nematode communities was examined along a pollution gradient with increasing distance from a metallurgical factory. Total and available heavy metal contents were used to study the effects of heavy metals on nematode abundance, trophic groups and ecological indices. The results demonstrated significant correlations between the number of total nematodes, bacterivores, plant-parasites and the total and available heavy metals. Bacterivores and plant-parasites were the dominant trophic groups. Significant differences in different sampling sites were found only in the number of bacterivores（P〈0.01）. The Shannon-Weaver diversity index（W）, trophic diversity index（TD）, evenness index（J＇） and dominance index（λ） were found to be sensitive to soil pH and C/N ratios. Significant correlations were found between the total nematodes （TNEM）, some genera （A crobeloides, Aphelenchoides, Cephalobus, Ditylenchus, Mesorhabditis, Tetylenchus and Tylenchus） and distance from the factory.

关键词： soil nematodes trophic groups ecological indices heavy metals metallurgical factory

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Isolation and characterization of Sporobolomyces sp. LF1 capable of degrading chlorimuron-ethyl

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Journal of Environmental Sciences 2009年第9期21卷 1253-1260页

作者： ZHANG Xiaoli ZHANG Huiwen LI Xu SU Zhencheng WANG Jingjing ZHANG Chenggang Key laboratory of terrestrial Ecological Process Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China. Graduate University of Chinese Academy of Sciences Beijing 100039 China

A yeast strain which was capable of degrading sulfonylurea herbicide chlorimuron-ethyl named as LF1 was isolated from a chlorimuron-ethyl contaminated soil near the warehouse of the factory producing chlorimuron-ethyl in Shenyang City, Northeast China. The strain was identified as Sporobolomyces sp., based on its morphological and physiological characteristics and the phylogenetic analysis of 18S rRNA gene sequence. So far, this is the only yeast strain of Sporobolomyces sp. which is able to degrade chlorimuronethyl. Incubation tests showed that when the initial concentration of chlorimuron-ethyl in culture was 5 mg/L, LF1 could degrade more than 77% of the herbicide after incubation for 4 d at 30℃. The possible mechanism of chlorimuron-ethyl degradation by LF1 could be the acidic hydrolysis caused by the acids from the metabolism of the yeast strain. Further study should be conducted to examine the pathways of chlorimuron-ethyl degradation by LF1 and to approach the feasibility of using LF1 to degrade the chlorimuron-ethyl in soil system.

关键词： chlorimuron-ethyl Sporobolomyces sp. metabolic acid acidic hydrolysis

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Toxic effects of acetochlor, methamidophos and their combination on nifH gene in soil

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Journal of Environmental Sciences 2007年第7期19卷 864-873页

作者： SU Zhen-cheng ZHANG Hui-wen LI Xin-yu ZHANG Qin ZHANG Cheng-gang Key laboratory of terrestrial Ecological Process Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China. Graduate School of the Chinese Academy of Sciences Beijing 100039 China

Toxic effects of two agrochemicals on nifH gene in agricultural black soil were investigated using denaturing gradient gel electrophoresis （DGGE） and sequencing approaches in a microcosm experiment. Changes of soil nifH gene diversity and composition were examined following the application of acetochlor, methamidophos and their combination. Acetochlor reduced the nifH gene diversity （both in gene richness and diversity index values） and caused changes in the nifH gene composition. The effects of acetochlor on nifH gene were strengthened as the concentration of acetochlor increased. Cluster analysis of DGGE banding patterns showed that nifH gene composition which had been affected by low concentration of acetochlor （50 mg/kg） recovered firstly. Methamidophos reduced nifH gene richness that except at 4 weeks. The medium concentration of methamidophos （150 mg/kg） caused the most apparent changes in nifH gene diversity at the first week while the high concentration of methamidophos （250 mg/kg） produced prominent effects on nifH gene diversity in the following weeks. Cluster analysis showed that minimal changes of nifH gene composition were found at 1 week and maximal changes at 4 weeks. Toxic effects of acetochlor and methamidophos combination on nifH gene were also apparent. Different nifH genes （bands） responded differently to the impact of agrochemicals： four individual bands were eliminated by the application of the agrochemicals, five bands became predominant by the stimulation of the agrochemicals, and four bands showed strong resistance to the influence of the agrochemicals. Fifteen prominent bands were partially sequenced, yielding 15 different nifH sequences, which were used for phylogenetic reconstructions. All sequences were affiliated with the alpha- and beta-proteobacteria, showing higher similarity to eight different diazotrophic genera.

关键词： agrochemicals acetochlor methamidophos toxic effects nifH gene PCR-DGGE

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Single and joint effects of pesticides and mercury on soil urease

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Journal of Environmental Sciences 2007年第2期19卷 210-216页

作者： YANG Chun-lu SUN Tie-hang HE Wen-xiang ZHOU Qi-xing CHEN Su Key laboratory of Environmental Engineering Shenyang University Shenyang 110044 China Key laboratory of terrestrial Ecological Process Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China

The influence of two pesticides including chlorimuron-ethyl and furadan and mercury （Hg） on urease activity in 4 soils （meadow burozem and phaeozem） was investigated. The soils were exposed to various concentrations of the two pesticides and Hg individually and simultaneously. Results showed that there was a close relationship between urease activity and organic matter content in soil. Chlorimuron-ethyl and furadan could both activate urease in the 4 soils. The maximum increment of urease activity by chlorimuronethyl was up to 14%-18%. There was almost an equal increase （up to 13%-21%） in the urease activity by furadan. On the contrary, Hg markedly inhibited soil urease activity. A logarithmic equation was used to describe the relationship （P〈0.05） between the concentration of Hg and the activity of soil urease in the 4 tested soils. Semi-effect dose （ED50） values by the stress of Hg based on the inhibition of soil urease in the 4 soils were 88, 5.5, 24 and 20 mg/kg, respectively, according to the calculation of the corresponding equations. The interactive effect of chlorimuron-ethyl or furadan with metal Hg on soil urease was mainly synergic at the highest tested concentrations.

关键词： chlorimuron-ethyl furadan mercury soil urease combined pollution

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Dynamic changes in microbial activity and community structure during biodegradation of petroleum compounds:A laboratory experiment

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Journal of Environmental Sciences 2007年第8期19卷 1003-1013页

作者： LI Hui ZHANG Ying KRAVCHENKO Irina XU Hui ZHANG Cheng-gang Key laboratory of terrestrial Ecological Processes Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China. Winogradsky Institute of Microbiology Russian Academy of Sciences Moscow 117312 Russia

With 110-d incubation experiment in laboratory, the responses of microbial quantity, soil enzymatic activity, and bacterial community structure to different amounts of diesel fuel amendments were studied to reveal whether certain biological and biochemical characteristics could serve as reliable indicators of petroleum hydrocarbon contamination in meadow-brown soil, and use these indicators to evaluate the actual ecological impacts of 50-year petroleum-refining wastewater irrigation on soil function in Shenfu irrigation area. Results showed that amendments of ~ 1000 mg/kg diesel fuel stimulated the growth of aerobic heterotrophic bacteria, and increased the activity of soil dehydrogenase, hydrogenperoxidase, polyphenol oxidase and substrate-induced respiration. Soil bacterial diversity decreased slightly during the first 15 d of incubation and recovered to the control level on day 30. The significant decrease of the colony forming units of soil actinomyces and filamentous fungi can be taken as the sensitive biological indicators of petroleum contamination when soil was amended with 〉15000 mg/kg diesel fuel. The sharp decrease in urease activity was recommended as the most sensitive biochemical indicator of heavy diesel fuel contamination. The shifts in community structure to a community documented by Sphingomonadaceae within a-subgroup of Proteobacteria could be served as a sensitive and precise indicator of diesel fuel contamination. Based on the results described in this paper, the soil function in Shenfu irrigation area was disturbed to some extent.

关键词： petroleum hydrocarbons enzymatic activity bacterial diversity microbial community structure DGGE

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Selecting the best:Interspecific and age-related diet differences among sympatric steppe passerines

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Avian Research 2023年第4期14卷 611-622页

作者： Julia Zurdo Paula Gomez-Lopez Adrian Barrero Daniel Bustillo-de la Rosa Julia Gomez-Catasús Margarita Reverter Cristian Perez-Granados Manuel B.Morales Juan Traba terrestrial ecology Group Department of EcologyUniversidad Autonoma de Madrid(TEG-UAM)MadridSpain Centro de Investigacion en Biodiversidady Cambio Global Universidad Autonoma de Madrid(CIBC-UAM)MadridSpain ecology Department/IMEM“Ramon Margalef” Universidad de AlicanteAlicanteSpain

Parental food provisioning is crucial for the growth and survival of *** rate depends on food quality and food supplied to offspring may differ from what adults use for their *** the case of steppe passerine birds,detailed characterization on nestling dietary composition,as well as prey choice and resource partitioning among species,is a pending *** differences between nestlings and adults remain also largely *** using faecal DNA metabarcoding,we described the diet of nestlings and adults of five shrub-steppe passerine species over the 2017–2019 breeding seasons in central *** also monitored arthropod availability in the field to assess dietary *** expected interspecific dietary differences to limit competition for food resources among sympatric species,as well as parental selection of high quality prey for *** also predicted age-related differences,with nestlings being fed nutrient-rich prey more frequently than *** main arthropod orders provisioned to nestlings were Orthoptera,Julida,Araneae and *** of the different species showed high interspecific diet overlap,indicating both a coincidence in growth needs among bird species and no or little limitation of the most profitable resources during the breeding *** of all species showed higher diet richness than nestlings,and age-related differences in prey composition were mainly driven by the selection of the most easily digestible,larger protein-and calcium-rich prey for nestlings,which may favour their rapid growth,and avoiding highly sclerotized and less nutritional prey such as *** study sheds light on the basic ecology and conservation of these declining steppe birds,indicating that interspecific competition may not be a major factor during the breeding *** the current global decline of arthropods,further long-term research would be necessary,along with the implementation of effective conservation measure

关键词： 18S Faecal material Nestling diet Prey choice Resource partitioning

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Vertical Distribution and Seasonal Fluctuation of Nematode Trophic Groups as Affected by Land Use

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Pedosphere 2006年第2期16卷 169-176页

作者： MENG Fan-Xiang OU Wei LI Qi JIANG Yong WEN Da-Zhong Key laboratory of terrestrial Ecological Process Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 （China）. Graduate School of the Chinese Academy of Sciences Beijing 100039 （China）

A field investigation was conducted at the Shenyang Experimental Station of ecology, Chinese Academy of Sciences, in an aquic brown soil of Northeast China under three land use types (cropland, abandoned cropland, and woodland) in order to evaluate whether the vertical distribution and seasonal fluctuation for the number of total nematodes and trophic groups could reflect soil ecosystem differences and to determine the relationships between soil chemical properties and soil nematodes. The majority of soil nematodes were present in the 0-20 cm soil layers, and for these land use types plant parasites were the most abundant trophic group. In the abandoned cropland the numbers of plant parasites reached a peak on the August sampling date, whereas the cropland and woodland peaked on the October sampling date. Meanwhile, in all land use types the number of total nematodes, bacterivores, plant parasites, and omnivores-predators was negatively (P < 0.05, except for bacterivores in cropland, which was not significant) correlated with bulk density, and positively (P < 0.05, except for fungivores in abandoned cropland, which was not significant) correlated with total organic carbon and total nitrogen.

关键词： aquic brown soil land uses soil nematode trophic groups vertical distribution

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Rhizosphere fungal community assembly varied across functional guilds in a temperate forest

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Ecological Processes 2023年第1期12卷 83-97页

作者： Shuang Liang Ricardo Arraiano-Castilho Lena Neuenkamp Hui Li Zhen Bai Mengxu Zhang Jin Yin Zuoqiang Yuan Xugao Wang CAS Key laboratory of Forest ecology and Management Institute of Applied Ecology Chinese Academy of SciencesShenyang 110016China Key laboratory of terrestrial Ecosystem Carbon Neutrality Shenyang 110016China University of Chinese Academy of Sciences Beijing 100049China Department of ecology and Evolution University of Lausanne1015 LausanneSwitzerland Department of ecology&Multidisciplinary Institute for Environment Studies “Ramon Margalef”University of AlicanteAlicanteSpain School of ecology and Environment Northwestern Polytechnical UniversityXi’an 710129China

Background Rhizosphere fungi play an important role in plant community dynamics and biogeochemical *** the drivers of fungal community assembly have been studied in varied ecosystems,it is still unclear how these processes function for rhizosphere soil fungi in temperate ***,it is unknown whether the relative contributions of important determinants remain consistent or vary across fungal ecological *** study used high-throughput next-generation sequencing to characterize the fungal communities of 247 rhizosphere soil samples from 19 tree species in a temperate forest within Northeast *** aimed to investigate how three important determinants in temperate forests(host tree species,neighbouring plant communities,and edaphic properties)influence the community assembly of fungal functional guilds in the rhizosphere soil of *** We found that host tree species contributed more to plant pathogens’community composition than ectomycorrhizal fungi,and plant pathogens consistently showed higher host specialization than ectomycorrhizal *** also showed high host specialization,which was mediated by the tree species’effect on rhizosphere soil *** neighboring plant communities contributed remarkably to richness of all fungal guilds,this effect on fungal composition varied across functional guilds,with stronger effect for biotrophic guilds(plant pathogens and ectomycorrhizal fungi)than for non-biotrophic guild(saprotrophs).Neighboring plant communities shaped the ectomycorrhizal community composition strongly in all samples regardless of host trees’mycorrhizal type,whereas edaphic properties were the most important drivers for this guild in samples from only ectomycorrhizal-associated *** properties played an important role in shaping ectomycorrhizal and saprotrophic fungal compositions,indicating the importance of edaphic properties on the fungal functional guilds associated with the absorption and dec

关键词： Host species effect Neighbouring plant communities Edaphic properties Rhizosphere soil fungi Host specialization Temperate forest

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Soil Microbial Characteristics Under Long-Term Heavy Metal Stress:A Case Study in Zhangshi Wastewater Irrigation Area,Shenyang

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Pedosphere 2008年第1期18卷 1-10页

作者： ZHANC Yan ZHANG Hui-Wen SU Zhen-Cheng ZHANG Cheng-Gang Key laboratory of terrestrial Ecological Process Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 (China) Graduate School of the Chinese Academy of Sciences Beijing 100039 (China)

Soil samples were collected from Zhangshi Wastewater Irrigation Area in the suburb of Shenyang City,China,an area with a 30-year irrigation history with heavy metal-containing *** chemical properties and microbial characteristics of the soils were examined to evaluate the present situation of heavy metal pollution and to assess the soil microbial characteristics under long-term heavy metal *** light of the National Environmental Quality Standards of China,the soil in the test area was heavily polluted by Cd and to a lesser degree by Zn and Cu,even though wastewater irrigation ceased in *** metabolic quotient (qCO_2) had a significant positive correlation,while soil microbial quotient (qM) had a negative correlation with content of soil heavy *** microbial biomass carbon (MBC) had significantly negative correlation with Cd,but soil substrate-induced respiration (SIR),dehydrogenase activity (DHA),cellulase activity, and culturable microbial populations had no persistent correlations with soil heavy metal *** nutrients,except for phosphorous,showed positive effects on soil microbial characteristics,which to a certain degree obscured the adverse effects of soil heavy *** Cd contributed more to the soil microbial characteristics,but qM and qCO_2 were more sensitive and showed persistent responses to heavy metals *** could be concluded that qM and qCO_2 can be used as bioindicators of heavy metal pollution in soils.

关键词： heavy metal stress metabolic quotient microbial biomass microbial quotient wastewater irrigation

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