Crab bioturbation drives coupled iron-phosphate-sulfide cycling in mangrove and salt marsh soils
文献类型：期刊论文
| 作者 | Xiao, K.3,4 ; Pan, F.2; Santos, I.R.1; Zheng, Y.3,4; Zheng, C.M.3,4; Chen, N.W.2; Lu, Z.Y.2; Wang, F.F.2; Li, Z.Y.4; Li, H.L.3,4
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| 刊名 | Geoderma
 |
| 出版日期 | 2022 |
| 卷号 | 424页码:115990 |
| 关键词 | Bioturbation Blue carbon system Soil-water interfere Benthic flux Coastal biogeochemistry |
| ISSN号 | 0016-7061 |
| DOI | https://doi.org/10.1016/j.geoderma.2022.115990 |
| 英文摘要 | Coastal wetlands sequestering abundant blue carbon in soils are biogeochemical hotspots and critical habitats for benthic animals like invertebrate fiddler crabs. Here, we reveal how crab bioturbation (i.e., burrowing activity) drives the redox geochemistry of ferrous iron (Fe(II)), phosphate (PO43-), and sulfide (S(-II)) under contrasting vegetation types and hydrological conditions. We used in-situ approaches of diffusive gradients in thin films to perform detailed mm-scale burrow observations in two subtropical wetlands with a vegetation gradient of mudflat-salt marsh-mangrove. Burrow flushing caused a top-down hydrologic connectivity through the crab burrows and thus created a deep depth for the occurrence of Fe(III) reduction and sulfate reduction which were accompanied by P mobilization. The burrow oxidation zone, indicated by lower concentrations of Fe(II), PO43- and S(-II), were shallower in mudflats and salt marshes than in mangroves due to the unique respiratory roots of mangrove plants. The redox of Fe(II), PO(4)(3-)and S(-II) in crab burrow was insensitive to the convection flow induced input of dissolved oxygen through the surrounding soil matrix, indicating the burrow soil is an independent microenvironment. Crab burrowing activities favored Fe-S coupling which is conductive the formation of pyrite and alkalinity generation. Overall, our in-situ high-resolution observations and porewater hydraulic dynamics revealed spatially variable soil geochemistry, active coupled cycling of Fe-P-S in crab burrows, and mm-scale hotspots of redox cycling within burrows. |
| 语种 | 英语 |
| 源URL | [http://ir.yic.ac.cn/handle/133337/38087]  |
| 专题 | 个人在本单位外知识产出 |
| 通讯作者 | Li, H.L. |
| 作者单位 | 1.Univ Gothenburg, Dept Marine Sci 2.Xiamen Univ, Coll Environm & Ecol 3.Southern Univ Sci & Technol, Guangdong Prov Key Lab Soil & Groundwater Pollut C 4.Southern Univ Sci & Technol, Sch Environm Sci & Engn, State Environm Protect Key Lab Integrated Surface |
| 推荐引用方式 GB/T 7714 | Xiao, K.,Pan, F.,Santos, I.R.,et al. Crab bioturbation drives coupled iron-phosphate-sulfide cycling in mangrove and salt marsh soils[J]. Geoderma,2022,424:115990. |
| APA | Xiao, K..,Pan, F..,Santos, I.R..,Zheng, Y..,Zheng, C.M..,...&Li, H.L..(2022).Crab bioturbation drives coupled iron-phosphate-sulfide cycling in mangrove and salt marsh soils.Geoderma,424,115990. |
| MLA | Xiao, K.,et al."Crab bioturbation drives coupled iron-phosphate-sulfide cycling in mangrove and salt marsh soils".Geoderma 424(2022):115990. |
入库方式： OAI收割
来源：烟台海岸带研究所
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