Diverse transformations of sulfur in seabird-affected sediments revealed by microbial and stable isotope analyses

Lili SHEN; Tao HUANG; Yuanqing CHEN; Zhuding CHU; Zhouqing XIE

doi:10.1007/s00343-021-1173-z

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Diverse transformations of sulfur in seabird-affected sediments revealed by microbial and stable isotope analyses

Chemistry | Updated：2023-04-27

- Diverse transformations of sulfur in seabird-affected sediments revealed by microbial and stable isotope analyses
- Diverse transformations of sulfur in seabird-affected sediments revealed by microbial and stable isotope analyses
- 海洋湖沼学报（英文） 2023年41卷第1期页码：138-149
- Affiliations：
  
  1.School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
  2.Anhui Province Key Laboratory of Wetland Ecosystem Protection and Restoration, Anhui University, Hefei 230601, China
  3.Anhui Key Laboratory of Polar Environment and Global Change, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China
- Author bio：
  
  Tao HUANG, E-mail: huangt@ahu.edu.cn
- Funds：
  
  the National Natural Science Foundation of China(41476165);the University Natural Science Research Project of Anhui Province(KJ2019A0042);© Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature 2023
- DOI：10.1007/s00343-021-1173-z
  中图分类号：
- 收稿：2021-06-02，
  
  录用：2021-11-12，
  
  网络首发：2021-12-16，
  
  纸质出版：2023-01
- Accepted：
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Diverse transformations of sulfur in seabird-affected sediments revealed by microbial and stable isotope analyses[J]. 海洋湖沼学报（英文）, 2023,41(1):138-149.

Lili SHEN, Tao HUANG, Yuanqing CHEN, et al. Diverse transformations of sulfur in seabird-affected sediments revealed by microbial and stable isotope analyses[J]. Journal of Oceanology and Limnology, 2023, 41(1): 138-149.
Diverse transformations of sulfur in seabird-affected sediments revealed by microbial and stable isotope analyses[J]. 海洋湖沼学报（英文）, 2023,41(1):138-149. DOI： 10.1007/s00343-021-1173-z.

Lili SHEN, Tao HUANG, Yuanqing CHEN, et al. Diverse transformations of sulfur in seabird-affected sediments revealed by microbial and stable isotope analyses[J]. Journal of Oceanology and Limnology, 2023, 41(1): 138-149. DOI： 10.1007/s00343-021-1173-z.

摘要

Abstract

Microbial communities

sulfur isotope of sulfides (δ

AVS

and δ

CRS

)

and sulfur and oxygen isotopes of sulfate (δ

and δ

) in sediments were analyzed to reveal the biogeochemical transformations of sulfur in a seabird-affected lake Y2 and a seabird-free YO from Fildes Peninsula

Antarctic Peninsula. The microbial communities in Y2 were mainly associated with penguin activities

while those in YO were limited by nutrients. The much enriched δ

recorded at depth of 30

and 52 cm in Y2 indicates very strong sulfate reduction therein. The sulfur-degrading bacteria

Pseudomonas

in 0–23 cm of Y2 was 3.5 times as abundant as that of sulfur oxidizing bacteria (SOB)

indicating remarkable remineralization of organic sulfur. The abundant SOB and

S-depleted sulfate indicate considerable sulfur oxidation in 34–56-cm layer in Y2. In YO sediments

the highest abundance of

Desulfotalea

and the most enriched δ

(35.2‰) and δ

CRS

(2.5‰) indicate the strongest sulfate reduction in 28-cm layer. High abundance of

Pseudomonas

indicates active remineralization of organic sulfur in 3–5-cm layer in YO. The medium δ

and considerable abundance of SOB and sulfate-reducing bacteria (SRB) indicate concurrence of sulfur oxidation and sulfate reduction in other layers in YO. Therefore

a high level of organic matter input from penguin populations supported the diverse microbial community and transformations of sulfur in aquatic ecosystems in Antarctica.

关键词

Keywords

references

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