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Erik Jeppesen

Contrasting patterns of freshwater microbial metabolic potentials and functional gene interactions between an acidic mining lake and a weakly alkaline lake

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DOI

  • Lijuan Ren, Chinese Acad Sci, Nanjing Institute of Geography & Limnology, CAS, Chinese Academy of Sciences, State Key Lab Lake Sci & Environm, Nanjing Inst Geog & Limnol
  • ,
  • Xingyu Song, Chinese Acad Sci, South China Sea Institute of Oceanology, CAS, Chinese Academy of Sciences, South China Sea Inst Oceanol, Key Lab Trop Marine Bioresources & Ecol LMB
  • ,
  • Erik Jeppesen
  • Peng Xing, Chinese Acad Sci, Nanjing Institute of Geography & Limnology, CAS, Chinese Academy of Sciences, State Key Lab Lake Sci & Environm, Nanjing Inst Geog & Limnol
  • ,
  • Lone Liboriussen
  • ,
  • Xiangrong Xu, Chinese Acad Sci, South China Sea Institute of Oceanology, CAS, Chinese Academy of Sciences, South China Sea Inst Oceanol, Key Lab Trop Marine Bioresources & Ecol LMB
  • ,
  • Qinglong L. Wu, Univ Chinese Acad Sci, Chinese Academy of Sciences, University of Chinese Academy of Sciences, CAS, Sino Danish Ctr Educ & Res

Acidic coal mining lakes (AMLs) are characterized by low pH, low biodiversity, and high concentrations of sulfate and metals. However, to date, knowledge is inadequate on the involvement of the aquatic microbial functions in biogeochemical processes of an AML. Here, we use a natural weakly alkaline lake (WAL) as a reference to investigate the functional gene structure of microbial communities in the aerobic surface waters of an AML by using a metagenomic approach with GeoChip-based functional gene arrays (GeoChip 5.0). We found significant differences in the compositions of the microbial functional genes between the two lake types. The AML had significantly lower gene diversity than the WAL, and the functional genes detected in the AML were almost a subset of those in the WAL. We also found significant differences in the microbial metabolic potentials between the two lake types. In the AML, the microbial communities had higher functional capacities in phosphorus-utilization, sulfur oxidation, and metal-detoxification and had lower metabolic potentials of carbon and nitrogen fixation, and the degradation of starch, hemicellulose, cellulose, chitin, and lignin than those in the WAL. By performing null model and network analyses, we observed stronger deterministic effects of the functional gene assemblages and greater clustering among the co-occurring functional genes in the AML than those in the WAL. Altogether, we demonstrated contrasting patterns of freshwater microbial metabolic potentials and functional gene interactions between an AML and a WAL, which may advance the understanding of microbial functional response to acidification in freshwater lakes.

Original languageEnglish
JournalLimnology and Oceanography
Volume63
Pages (from-to)S354-S366
Number of pages13
ISSN0024-3590
DOIs
Publication statusPublished - Mar 2018

    Research areas

  • COOCCURRENCE PATTERNS, COMMUNITY COMPOSITION, MINE DRAINAGE, RIO-TINTO, SOUTHWESTERN SPAIN, SEDIMENTS, BACTERIA, MICROORGANISMS, ENVIRONMENT, DIVERSITY

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