Selenium volatilization from tundra soils in maritime Antarctica
Maritime Antarctica harbors a large number of penguins and seals that provide considerable input of selenium (Se) originating as guano into terrestrial ecosystems. Subsequent Se emissions via biomethylation and volatilization from these sources of Se have not been studied. Here, penguin colony soils...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-01-01
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| Series: | Environment International |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0160412020321449 |
| _version_ | 1818389664180994048 |
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| author | Wenjuan Ye Linxi Yuan Renbin Zhu Xuebin Yin Gary Bañuelos |
| author_facet | Wenjuan Ye Linxi Yuan Renbin Zhu Xuebin Yin Gary Bañuelos |
| author_sort | Wenjuan Ye |
| collection | DOAJ |
| description | Maritime Antarctica harbors a large number of penguins and seals that provide considerable input of selenium (Se) originating as guano into terrestrial ecosystems. Subsequent Se emissions via biomethylation and volatilization from these sources of Se have not been studied. Here, penguin colony soils (PCS) and adjacent tundra marsh soils (TMS), seal colony soils (SCS) and adjacent tundra soils (STS), and normal upland tundra soils (NTS) were collected in maritime Antarctica. For the first time, Se volatilization and speciation were investigated in these soils through incubation experiments using chemo-trapping method. The Se contents in PCS, SCS, STS and TMS were highly enriched compared with NTS, with organic matter-bound Se accounting for 70%-80%. Laboratory incubations yielded the greatest Se volatilization rates (VRSe) in PCS (0.20 ± 0.01 μg kg−1 d−1), followed by SCS (0.14 ± 0.01 μg kg−1 d−1) at low temperature (4 °C). Soil frozen-thawing induced 1–4 fold increase in VRSe, and the VRSe continuously increased until the soils fully thawed. The VRSe showed a significant positive correlation (R2 = 0.96, p < 0.01) with soil temperature. Methylated Se species were dominated by dimethylselenide (DMSe) in PCS and dimethyldiselenide (DMDSe) in SCS. Our results imply that the combination of climate warming, frozen-thawing processes, and high-Se inputs from sea animals will significantly increase tundra soil Se volatilization in maritime Antarctica. High VRSe from penguin colony soils, and significantly elevated Se levels in the mosses close to penguin colony, suggest that volatilization of Se from penguin colony soils play an important role in the mobilization and regional biogeochemical cycling of Se in maritime Antarctica. |
| first_indexed | 2024-12-14T04:45:19Z |
| format | Article |
| id | doaj.art-b0fc3081c2e549929c0ee84711995bb5 |
| institution | Directory Open Access Journal |
| issn | 0160-4120 |
| language | English |
| last_indexed | 2024-12-14T04:45:19Z |
| publishDate | 2021-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Environment International |
| spelling | doaj.art-b0fc3081c2e549929c0ee84711995bb52022-12-21T23:16:41ZengElsevierEnvironment International0160-41202021-01-01146106189Selenium volatilization from tundra soils in maritime AntarcticaWenjuan Ye0Linxi Yuan1Renbin Zhu2Xuebin Yin3Gary Bañuelos4Anhui Province Key Laboratory of Polar Environment and Global Change, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, ChinaDepartment of Health and Environmental Sciences, Xi’an Jiaotong-Liverpool University, Suzhou 215123, Jiangsu, ChinaAnhui Province Key Laboratory of Polar Environment and Global Change, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China; Corresponding author at: University of Science and Technology of China, Hefei, China.Key Laboratory of Functional Agriculture, Suzhou Research Institute, University of Science and Technology of China, Suzhou 215123, Jiangsu, ChinaUnited States Department of Agriculture-Agricultural Research Service, Parlier, CA, USAMaritime Antarctica harbors a large number of penguins and seals that provide considerable input of selenium (Se) originating as guano into terrestrial ecosystems. Subsequent Se emissions via biomethylation and volatilization from these sources of Se have not been studied. Here, penguin colony soils (PCS) and adjacent tundra marsh soils (TMS), seal colony soils (SCS) and adjacent tundra soils (STS), and normal upland tundra soils (NTS) were collected in maritime Antarctica. For the first time, Se volatilization and speciation were investigated in these soils through incubation experiments using chemo-trapping method. The Se contents in PCS, SCS, STS and TMS were highly enriched compared with NTS, with organic matter-bound Se accounting for 70%-80%. Laboratory incubations yielded the greatest Se volatilization rates (VRSe) in PCS (0.20 ± 0.01 μg kg−1 d−1), followed by SCS (0.14 ± 0.01 μg kg−1 d−1) at low temperature (4 °C). Soil frozen-thawing induced 1–4 fold increase in VRSe, and the VRSe continuously increased until the soils fully thawed. The VRSe showed a significant positive correlation (R2 = 0.96, p < 0.01) with soil temperature. Methylated Se species were dominated by dimethylselenide (DMSe) in PCS and dimethyldiselenide (DMDSe) in SCS. Our results imply that the combination of climate warming, frozen-thawing processes, and high-Se inputs from sea animals will significantly increase tundra soil Se volatilization in maritime Antarctica. High VRSe from penguin colony soils, and significantly elevated Se levels in the mosses close to penguin colony, suggest that volatilization of Se from penguin colony soils play an important role in the mobilization and regional biogeochemical cycling of Se in maritime Antarctica.http://www.sciencedirect.com/science/article/pii/S0160412020321449AntarcticaTundra soilSelenium volatilizationSelenium methylationPenguin guano |
| spellingShingle | Wenjuan Ye Linxi Yuan Renbin Zhu Xuebin Yin Gary Bañuelos Selenium volatilization from tundra soils in maritime Antarctica Environment International Antarctica Tundra soil Selenium volatilization Selenium methylation Penguin guano |
| title | Selenium volatilization from tundra soils in maritime Antarctica |
| title_full | Selenium volatilization from tundra soils in maritime Antarctica |
| title_fullStr | Selenium volatilization from tundra soils in maritime Antarctica |
| title_full_unstemmed | Selenium volatilization from tundra soils in maritime Antarctica |
| title_short | Selenium volatilization from tundra soils in maritime Antarctica |
| title_sort | selenium volatilization from tundra soils in maritime antarctica |
| topic | Antarctica Tundra soil Selenium volatilization Selenium methylation Penguin guano |
| url | http://www.sciencedirect.com/science/article/pii/S0160412020321449 |
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