Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14124 |
Soil properties and sediment accretion modulate methane fluxes from restored wetlands | |
Chamberlain, Samuel D.1; Anthony, Tyler L.1; Silver, Whendee L.1; Eichelmann, Elke1; Hemes, Kyle S.1; Oikawa, Patricia Y.2; Sturtevant, Cove3; Szutu, Daphne J.1; Verfaillie, Joseph G.1; Baldocchi, Dennis D.1 | |
2018-09-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2018 |
卷号 | 24期号:9页码:4107-4121 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Wetlands are the largest source of methane (CH4) globally, yet our understanding of how process-level controls scale to ecosystem fluxes remains limited. It is particularly uncertain how variable soil properties influence ecosystem CH4 emissions on annual time scales. We measured ecosystem carbon dioxide (CO2) and CH4 fluxes by eddy covariance from two wetlands recently restored on peat and alluvium soils within the Sacramento-San Joaquin Delta of California. Annual CH4 fluxes from the alluvium wetland were significantly lower than the peat site for multiple years following restoration, but these differences were not explained by variation in dominant climate drivers or productivity across wetlands. Soil iron (Fe) concentrations were significantly higher in alluvium soils, and alluvium CH4 fluxes were decoupled from plant processes compared with the peat site, as expected when Fe reduction inhibits CH4 production in the rhizosphere. Soil carbon content and CO2 uptake rates did not vary across wetlands and, thus, could also be ruled out as drivers of initial CH4 flux differences. Differences in wetland CH4 fluxes across soil types were transient; alluvium wetland fluxes were similar to peat wetland fluxes 3years after restoration. Changing alluvium CH4 emissions with time could not be explained by an empirical model based on dominant CH4 flux biophysical drivers, suggesting that other factors, not measured by our eddy covariance towers, were responsible for these changes. Recently accreted alluvium soils were less acidic and contained more reduced Fe compared with the pre-restoration parent soils, suggesting that CH4 emissions increased as conditions became more favorable to methanogenesis within wetland sediments. This study suggests that alluvium soil properties, likely Fe content, are capable of inhibiting ecosystem-scale wetland CH4 flux, but these effects appear to be transient without continued input of alluvium to wetland sediments. |
英文关键词 | alternative electron acceptor carbon flux eddy covariance greenhouse gas balance information theory peatland redox Sacramento-San Joaquin Delta |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000441746900019 |
WOS关键词 | SAN-JOAQUIN DELTA ; GREENHOUSE-GAS FLUXES ; EDDY-COVARIANCE ; ECOSYSTEM SERVICES ; CARBON-DIOXIDE ; FE(III)-REDUCING BACTERIA ; TEMPERATE PEATLAND ; NATURAL WETLANDS ; TIDAL MARSHES ; FOREST SOILS |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/16676 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA; 2.Calif State Univ Hayward, Dept Earth & Environm Sci, Hayward, CA 94542 USA; 3.Natl Ecol Observ Network, Boulder, CO USA |
推荐引用方式 GB/T 7714 | Chamberlain, Samuel D.,Anthony, Tyler L.,Silver, Whendee L.,et al. Soil properties and sediment accretion modulate methane fluxes from restored wetlands[J]. GLOBAL CHANGE BIOLOGY,2018,24(9):4107-4121. |
APA | Chamberlain, Samuel D..,Anthony, Tyler L..,Silver, Whendee L..,Eichelmann, Elke.,Hemes, Kyle S..,...&Baldocchi, Dennis D..(2018).Soil properties and sediment accretion modulate methane fluxes from restored wetlands.GLOBAL CHANGE BIOLOGY,24(9),4107-4121. |
MLA | Chamberlain, Samuel D.,et al."Soil properties and sediment accretion modulate methane fluxes from restored wetlands".GLOBAL CHANGE BIOLOGY 24.9(2018):4107-4121. |
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