Diverse transformations of sulfur in seabird-affected sediments revealed by microbial and stable isotope analyses
Abstract Microbial communities, sulfur isotope of sulfides ($ δ^{34} %$ S_{AVS} $ and $ δ^{34} %$ S_{CRS} $), and sulfur and oxygen isotopes of sulfate (%${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ and %${\delta ^{18}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$) in sediments were analyzed to reveal t...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Shen, Lili [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2022 |
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| Schlagwörter: |
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| Anmerkung: |
© Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature 2022 |
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| Übergeordnetes Werk: |
Enthalten in: Chinese journal of oceanology and limnology - Beijing : Science Press, 1982, 41(2022), 1 vom: 30. Aug., Seite 138-149 |
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| Übergeordnetes Werk: |
volume:41 ; year:2022 ; number:1 ; day:30 ; month:08 ; pages:138-149 |
| Links: |
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| DOI / URN: |
10.1007/s00343-021-1173-z |
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SPR049730932 |
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| 520 | |a Abstract Microbial communities, sulfur isotope of sulfides ($ δ^{34} %$ S_{AVS} $ and $ δ^{34} %$ S_{CRS} $), and sulfur and oxygen isotopes of sulfate (%${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ and %${\delta ^{18}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$) 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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ recorded at depth of 30, 41, 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 34S-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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}\,\left( {35.2\% } \right)%$ and $ δ^{34} %$ S_{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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ 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. | ||
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10.1007/s00343-021-1173-z doi (DE-627)SPR049730932 (SPR)s00343-021-1173-z-e DE-627 ger DE-627 rakwb eng Shen, Lili verfasserin aut Diverse transformations of sulfur in seabird-affected sediments revealed by microbial and stable isotope analyses 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature 2022 Abstract Microbial communities, sulfur isotope of sulfides ($ δ^{34} %$ S_{AVS} $ and $ δ^{34} %$ S_{CRS} $), and sulfur and oxygen isotopes of sulfate (%${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ and %${\delta ^{18}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$) 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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ recorded at depth of 30, 41, 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 34S-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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}\,\left( {35.2\% } \right)%$ and $ δ^{34} %$ S_{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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ 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. sulfur and oxygen isotope (dpeaa)DE-He213 dissimilatory sulfate reduction (dpeaa)DE-He213 sulfur oxidation (dpeaa)DE-He213 sulfate-reducing bacteria (dpeaa)DE-He213 Antarctica (dpeaa)DE-He213 Huang, Tao aut Chen, Yuanqing aut Chu, Zhuding aut Xie, Zhouqing aut Enthalten in Chinese journal of oceanology and limnology Beijing : Science Press, 1982 41(2022), 1 vom: 30. Aug., Seite 138-149 (DE-627)521479606 (DE-600)2262662-1 1993-5005 nnns volume:41 year:2022 number:1 day:30 month:08 pages:138-149 https://dx.doi.org/10.1007/s00343-021-1173-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_374 GBV_ILN_612 GBV_ILN_2522 GBV_ILN_2700 AR 41 2022 1 30 08 138-149 |
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10.1007/s00343-021-1173-z doi (DE-627)SPR049730932 (SPR)s00343-021-1173-z-e DE-627 ger DE-627 rakwb eng Shen, Lili verfasserin aut Diverse transformations of sulfur in seabird-affected sediments revealed by microbial and stable isotope analyses 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature 2022 Abstract Microbial communities, sulfur isotope of sulfides ($ δ^{34} %$ S_{AVS} $ and $ δ^{34} %$ S_{CRS} $), and sulfur and oxygen isotopes of sulfate (%${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ and %${\delta ^{18}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$) 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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ recorded at depth of 30, 41, 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 34S-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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}\,\left( {35.2\% } \right)%$ and $ δ^{34} %$ S_{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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ 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. sulfur and oxygen isotope (dpeaa)DE-He213 dissimilatory sulfate reduction (dpeaa)DE-He213 sulfur oxidation (dpeaa)DE-He213 sulfate-reducing bacteria (dpeaa)DE-He213 Antarctica (dpeaa)DE-He213 Huang, Tao aut Chen, Yuanqing aut Chu, Zhuding aut Xie, Zhouqing aut Enthalten in Chinese journal of oceanology and limnology Beijing : Science Press, 1982 41(2022), 1 vom: 30. Aug., Seite 138-149 (DE-627)521479606 (DE-600)2262662-1 1993-5005 nnns volume:41 year:2022 number:1 day:30 month:08 pages:138-149 https://dx.doi.org/10.1007/s00343-021-1173-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_374 GBV_ILN_612 GBV_ILN_2522 GBV_ILN_2700 AR 41 2022 1 30 08 138-149 |
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10.1007/s00343-021-1173-z doi (DE-627)SPR049730932 (SPR)s00343-021-1173-z-e DE-627 ger DE-627 rakwb eng Shen, Lili verfasserin aut Diverse transformations of sulfur in seabird-affected sediments revealed by microbial and stable isotope analyses 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature 2022 Abstract Microbial communities, sulfur isotope of sulfides ($ δ^{34} %$ S_{AVS} $ and $ δ^{34} %$ S_{CRS} $), and sulfur and oxygen isotopes of sulfate (%${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ and %${\delta ^{18}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$) 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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ recorded at depth of 30, 41, 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 34S-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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}\,\left( {35.2\% } \right)%$ and $ δ^{34} %$ S_{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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ 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. sulfur and oxygen isotope (dpeaa)DE-He213 dissimilatory sulfate reduction (dpeaa)DE-He213 sulfur oxidation (dpeaa)DE-He213 sulfate-reducing bacteria (dpeaa)DE-He213 Antarctica (dpeaa)DE-He213 Huang, Tao aut Chen, Yuanqing aut Chu, Zhuding aut Xie, Zhouqing aut Enthalten in Chinese journal of oceanology and limnology Beijing : Science Press, 1982 41(2022), 1 vom: 30. Aug., Seite 138-149 (DE-627)521479606 (DE-600)2262662-1 1993-5005 nnns volume:41 year:2022 number:1 day:30 month:08 pages:138-149 https://dx.doi.org/10.1007/s00343-021-1173-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_374 GBV_ILN_612 GBV_ILN_2522 GBV_ILN_2700 AR 41 2022 1 30 08 138-149 |
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10.1007/s00343-021-1173-z doi (DE-627)SPR049730932 (SPR)s00343-021-1173-z-e DE-627 ger DE-627 rakwb eng Shen, Lili verfasserin aut Diverse transformations of sulfur in seabird-affected sediments revealed by microbial and stable isotope analyses 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature 2022 Abstract Microbial communities, sulfur isotope of sulfides ($ δ^{34} %$ S_{AVS} $ and $ δ^{34} %$ S_{CRS} $), and sulfur and oxygen isotopes of sulfate (%${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ and %${\delta ^{18}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$) 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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ recorded at depth of 30, 41, 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 34S-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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}\,\left( {35.2\% } \right)%$ and $ δ^{34} %$ S_{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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ 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. sulfur and oxygen isotope (dpeaa)DE-He213 dissimilatory sulfate reduction (dpeaa)DE-He213 sulfur oxidation (dpeaa)DE-He213 sulfate-reducing bacteria (dpeaa)DE-He213 Antarctica (dpeaa)DE-He213 Huang, Tao aut Chen, Yuanqing aut Chu, Zhuding aut Xie, Zhouqing aut Enthalten in Chinese journal of oceanology and limnology Beijing : Science Press, 1982 41(2022), 1 vom: 30. Aug., Seite 138-149 (DE-627)521479606 (DE-600)2262662-1 1993-5005 nnns volume:41 year:2022 number:1 day:30 month:08 pages:138-149 https://dx.doi.org/10.1007/s00343-021-1173-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_374 GBV_ILN_612 GBV_ILN_2522 GBV_ILN_2700 AR 41 2022 1 30 08 138-149 |
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10.1007/s00343-021-1173-z doi (DE-627)SPR049730932 (SPR)s00343-021-1173-z-e DE-627 ger DE-627 rakwb eng Shen, Lili verfasserin aut Diverse transformations of sulfur in seabird-affected sediments revealed by microbial and stable isotope analyses 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature 2022 Abstract Microbial communities, sulfur isotope of sulfides ($ δ^{34} %$ S_{AVS} $ and $ δ^{34} %$ S_{CRS} $), and sulfur and oxygen isotopes of sulfate (%${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ and %${\delta ^{18}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$) 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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ recorded at depth of 30, 41, 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 34S-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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}\,\left( {35.2\% } \right)%$ and $ δ^{34} %$ S_{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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ 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. sulfur and oxygen isotope (dpeaa)DE-He213 dissimilatory sulfate reduction (dpeaa)DE-He213 sulfur oxidation (dpeaa)DE-He213 sulfate-reducing bacteria (dpeaa)DE-He213 Antarctica (dpeaa)DE-He213 Huang, Tao aut Chen, Yuanqing aut Chu, Zhuding aut Xie, Zhouqing aut Enthalten in Chinese journal of oceanology and limnology Beijing : Science Press, 1982 41(2022), 1 vom: 30. Aug., Seite 138-149 (DE-627)521479606 (DE-600)2262662-1 1993-5005 nnns volume:41 year:2022 number:1 day:30 month:08 pages:138-149 https://dx.doi.org/10.1007/s00343-021-1173-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_374 GBV_ILN_612 GBV_ILN_2522 GBV_ILN_2700 AR 41 2022 1 30 08 138-149 |
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Diverse transformations of sulfur in seabird-affected sediments revealed by microbial and stable isotope analyses sulfur and oxygen isotope (dpeaa)DE-He213 dissimilatory sulfate reduction (dpeaa)DE-He213 sulfur oxidation (dpeaa)DE-He213 sulfate-reducing bacteria (dpeaa)DE-He213 Antarctica (dpeaa)DE-He213 |
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diverse transformations of sulfur in seabird-affected sediments revealed by microbial and stable isotope analyses |
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Diverse transformations of sulfur in seabird-affected sediments revealed by microbial and stable isotope analyses |
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Abstract Microbial communities, sulfur isotope of sulfides ($ δ^{34} %$ S_{AVS} $ and $ δ^{34} %$ S_{CRS} $), and sulfur and oxygen isotopes of sulfate (%${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ and %${\delta ^{18}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$) 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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ recorded at depth of 30, 41, 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 34S-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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}\,\left( {35.2\% } \right)%$ and $ δ^{34} %$ S_{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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ 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. © Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature 2022 |
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Abstract Microbial communities, sulfur isotope of sulfides ($ δ^{34} %$ S_{AVS} $ and $ δ^{34} %$ S_{CRS} $), and sulfur and oxygen isotopes of sulfate (%${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ and %${\delta ^{18}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$) 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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ recorded at depth of 30, 41, 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 34S-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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}\,\left( {35.2\% } \right)%$ and $ δ^{34} %$ S_{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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ 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. © Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature 2022 |
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Abstract Microbial communities, sulfur isotope of sulfides ($ δ^{34} %$ S_{AVS} $ and $ δ^{34} %$ S_{CRS} $), and sulfur and oxygen isotopes of sulfate (%${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ and %${\delta ^{18}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$) 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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ recorded at depth of 30, 41, 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 34S-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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}\,\left( {35.2\% } \right)%$ and $ δ^{34} %$ S_{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 %${\delta ^{34}}{{\rm{S}}_{{\rm{S}}{{\rm{O}}_4}}}%$ 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. © Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature 2022 |
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