Effects of benthic macrofauna bioturbation on the bacterial community composition in lake sediments

2014 ◽  
Vol 60 (8) ◽  
pp. 517-524 ◽  
Author(s):  
Jin Zeng ◽  
Da-Yong Zhao ◽  
Peng Liu ◽  
Zhong-Bo Yu ◽  
Rui Huang ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Community Composition ◽  
Lake Taihu ◽  
Bacterial Community Composition ◽  
Chemical Properties ◽  
Eutrophic Lake ◽  
Benthic Macrofauna ◽  
Chironomidae Larvae ◽  
Culture Independent ◽  
Tubificid Worms

Benthic macrofauna are considered to be an important part of the lacustrine ecosystem, and bioturbation may greatly affect the biogeochemical processes and microbial activities in sediments. In the present study, the bacterial community composition in sediments inhabited by 3 different types of benthic macrofauna (Corbicula fluminea, Chironomidae larvae, and tubificid worms) in the shallow and eutrophic Lake Taihu was studied to investigate the different effects of bioturbation on the composition of these communities. Microcosms were constructed, and culture-independent methods, including terminal restriction fragment length polymorphism (T-RFLP) and clone library analysis, were performed to evaluate the bacterial communities. Analysis of similarities (ANOSIM) and multidimensional scaling (MDS) analysis of T-RFLP patterns demonstrated that differences in the bacterial community composition between the control and the macrofauna-inhabited sediments were not as great as expected, although the chemical properties of the sediments changed remarkably. Nevertheless, the dominant bacterial group in each type of macrofauna-inhabited sediment was different. Acidobacteria, Betaproteobacteria, and Deltaproteobacteria were the dominant bacterial groups in sediments inhabited by C. fluminea, tubificid worms, and Chironomidae larvae, respectively. The data obtained in this study are helpful for understanding the effects of bioturbation in a shallow, eutrophic lake.

Comparing sediment bacterial communities in the macrophyte-dominated and algae-dominated areas of eutrophic Lake Taihu, China

2011 ◽  
Vol 57 (4) ◽  
pp. 263-272 ◽  
Author(s):  
Keqiang Shao ◽  
Guang Gao ◽  
Boqiang Qin ◽  
Xiangming Tang ◽  
Yongping Wang ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Bacterial Community ◽  
Dna Sequences ◽  
Lake Taihu ◽  
Bacterial Community Composition ◽  
Eutrophic Lake ◽  
Banding Patterns ◽  
Factors Affecting ◽  
Specific Variation ◽  
Area Variation

Bacterial community structure and the effects of several environmental factors on bacterial community distribution were investigated in the sediment of the macrophyte-dominated and algae-dominated areas in a large, shallow, eutrophic freshwater lake (Lake Taihu, China). Surface sediment samples were collected at 6 sampling sites (3 sites from each of the 2 areas) on 15 February and 15 August 2009. Based on cluster analysis of the DGGE banding patterns, there were significant seasonal variations in the structure of the sediment bacterial community in the macrophyte- and algae-dominated areas, and site-specific variation within an area and between 2 areas. However, there were no significant between-area variations due to the large within-area variation. Analysis of DNA sequences showed that there were differences in the species composition of the sediment bacteria between the macrophyte- and algae-dominated area clone libraries. In the macrophyte-dominated area library, the bacterial community was dominated by Deltaproteobacteria, Verrucomicrobia, Acidobacteria, Bacteroidetes, Gammaproteobacteria, and Betaproteobacteria. OP10 was found in the library of this area but not in the algae-dominated area library. The algae-dominated area library was dominated by Betaproteobacteria, Deltaproteobacteria, Gammaproteobacteria, and Acidobacteria. Cyanobacteria, Alphaproteobacteria, and Planctomycetes were found in this area library but not in the macrophyte-dominated area library. Canonical correspondence analysis demonstrated that total phosphorus and water temperature were the dominant environmental factors affecting bacterial community composition in the sediment.

scholarly journals Geographic and Environmental Sources of Variation in Lake Bacterial Community Composition

2005 ◽  
Vol 71 (1) ◽  
pp. 227-239 ◽  
Author(s):  
Anthony C. Yannarell ◽  
Eric W. Triplett
Keyword(s):  
Bacterial Community ◽  
Community Composition ◽  
Bacterial Community Composition ◽  
Secchi Depth ◽  
Detection Threshold ◽  
Intergenic Spacer ◽  
Water Clarity ◽  
Culture Independent ◽  
Bacterial Assemblages ◽  
Landscape Level

ABSTRACT This study used a genetic fingerprinting technique (automated ribosomal intergenic spacer analysis [ARISA]) to characterize microbial communities from a culture-independent perspective and to identify those environmental factors that influence the diversity of bacterial assemblages in Wisconsin lakes. The relationships between bacterial community composition and 11 environmental variables for a suite of 30 lakes from northern and southern Wisconsin were explored by canonical correspondence analysis (CCA). In addition, the study assessed the influences of ARISA fragment detection threshold (sensitivity) and the quantitative, semiquantitative, and binary (presence-absence) use of ARISA data. It was determined that the sensitivity of ARISA was influential only when presence-absence-transformed data were used. The outcomes of analyses depended somewhat on the data transformation applied to ARISA data, but there were some features common to all of the CCA models. These commonalities indicated that differences in bacterial communities were best explained by regional (i.e., northern versus southern Wisconsin lakes) and landscape level (i.e., seepage lakes versus drainage lakes) factors. ARISA profiles from May samples were consistently different from those collected in other months. In addition, communities varied along gradients of pH and water clarity (Secchi depth) both within and among regions. The results demonstrate that environmental, temporal, regional, and landscape level features interact to determine the makeup of bacterial assemblages in northern temperate lakes.

Effects of different habitats on the bacterial community composition in the water and sediments of Lake Taihu, China

2020 ◽  
Vol 27 (36) ◽  
pp. 44983-44994
Author(s):  
Wenjie Chang ◽  
Jieli Sun ◽  
Yong Pang ◽  
Songhe Zhang ◽  
Lixue Gong ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Community Composition ◽  
Lake Taihu ◽  
Bacterial Community Composition

scholarly journals Repeated Application of Rice Straw Stabilizes Soil Bacterial Community Composition and Inhibits Clubroot Disease

Agriculture ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 108
Author(s):  
Zhe Han ◽  
Chengqian Di ◽  
Muhammad Khashi u Rahman ◽  
Danmei Gao ◽  
Fengzhi Wu ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Rice Straw ◽  
Community Composition ◽  
Chinese Cabbage ◽  
Bacterial Community Composition ◽  
Chemical Properties ◽  
Repeated Application ◽  
Clubroot Disease ◽  
Straw Amendment ◽  
Straw Application

Straw amendment can improve soil properties and is an effective strategy to control soil-borne diseases. However, gramineous straw application to vegetable fields has rarely been studied. In this study, rice straw was added to the field of Chinese cabbage for one or two years (repeated), and Chinese cabbage plant growth, disease occurrence and changes in soil chemical properties were measured. In addition, the bacterial community composition of Chinese cabbage was analyzed using Illumina MiSeq sequencing. Results showed that rice straw application increased the content of available nutrients, pH and electrical conductivity, but decreased the diversity and richness of the bacterial community. The relative abundances of Acidobacteria and Chloroflexi were increased after repeated rice straw application, which were associated with the available potassium and pH in the soil. Network analysis revealed that rice straw amendment differentially affected the key bacterial genera. These results suggest that repeated application of rice straw changed the soil chemical properties and altered the bacterial community composition to suppress the clubroot disease incidence in Chinese cabbage.

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