Relationships between sedimentary microbial communities and nutrient factors in Luoma Lake

Linduo Zhao, Liang Zhu, Gang Liu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Sediments microbial communities in aquatic environments are important because they are fundamental to biogeochemical and energy cycling, productivity as well as "buffering" capacity of aquatic ecosystems. We collected sediment samples from four stations characterized by different aquatic environmental conditions during two periods of times and investigated effects of nutrient factors on sedimentary microbial biomass and community structures using phospholipid fatty acid (PLFA) analysis. All four sampling stations were located around Luma Lake, a moderately eutrophic reservoir located in Jiangsu province, China. The result suggested that the sedimentary microbial biomass at all four sampling stations displayed a negative relationship to water temperatures and a positive relationship to degrees of eutrophication. Spatial scales of heterogeneity in sedimentary microbial biomass were affected by environments factors, i.e. they were more sensitive in eutrophic area. Spatial patterns and variation over time in sedimentary microbial community structure of Suqian water gate and Malingfan stations, which were characterized by similar riverine hydrological conditions and being moderately polluted, were alike. Principal component analysis suggested that it was more easily for microeukaryotes to be affected by aquatic environmental factors. Utilizing RDA, we found that total phosphorous, total nitrogen and ammonium-nitrogen were strongly associated with microeukaryotes and gram-positive bacteria positively, yet the ratios of microeukaryotes to bacteria and the ratios of gram-negative bacteria to gram-positive bacteria, which were considered to be community structure indicators, had no identifiable relationships with any nutrient factor.

Original languageEnglish (US)
Title of host publication2010 4th International Conference on Bioinformatics and Biomedical Engineering, iCBBE 2010
DOIs
StatePublished - Sep 6 2010
Externally publishedYes
Event4th International Conference on Bioinformatics and Biomedical Engineering, iCBBE 2010 - Chengdu, China
Duration: Jun 18 2010Jun 20 2010

Publication series

Name2010 4th International Conference on Bioinformatics and Biomedical Engineering, iCBBE 2010

Conference

Conference4th International Conference on Bioinformatics and Biomedical Engineering, iCBBE 2010
CountryChina
CityChengdu
Period6/18/106/20/10

Keywords

  • Aquatic environments of different types
  • Luoma lake
  • Nutrient factors
  • PLFA
  • Sedimentary microbial communities

ASJC Scopus subject areas

  • Biomedical Engineering
  • Health Informatics

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  • Cite this

    Zhao, L., Zhu, L., & Liu, G. (2010). Relationships between sedimentary microbial communities and nutrient factors in Luoma Lake. In 2010 4th International Conference on Bioinformatics and Biomedical Engineering, iCBBE 2010 [5517838] (2010 4th International Conference on Bioinformatics and Biomedical Engineering, iCBBE 2010). https://doi.org/10.1109/ICBBE.2010.5517838