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| DOI | 10.1016/j.soilbio.2023.109296 |
| Methane flux from transplanted soil monoliths depends on moisture, but not origin | |
| 发表日期 | 2024 |
| ISSN | 0038-0717 |
| EISSN | 1879-3428 |
| 起始页码 | 193 |
| 卷号 | 193 |
| 英文摘要 | Soils both produce and consume methane (CH4), a potent greenhouse gas that contributes to climate change. In coastal forests, upland soils are shifting from being CH4 sinks to sources as sea levels rise, increasingly flooding soils with little prior inundation history. Ecosystem CH4 budgets are highly uncertain due in part to the difficulty in separating fluxes measured at the soil surface into individual production and consumption processes which are likely to have different responses to future environmental conditions. We measured growing season CH4 fluxes from soil monoliths transplanted four years prior along an inundation and salinity gradient to determine how changes in abiotic conditions control CH4 flux rates. To parse net fluxes measured at the soil surface into their component gross rates, we paired field measurements with a stable isotope pool dilution incubation of surface soils. Throughout the growing season, net soil surface CH4 flux was positively correlated with soil moisture (p < 0.01), with lowland-located soils tending towards CH4 sources (mean 0.349 +/- 1.11 mg CH4-C m(-2) h(-1), error is standard deviation) and upland-located soils tending towards CH4 sinks (-0.003 +/- 0.003 mg CH4-C m(-2) h(-1)). Transplanted soils' fluxes were statistically identical to their native neighbors once microtopography-driven differences in soil moisture were controlled for. The pool dilution experiment revealed that production and consumption rates were similar in upland and lowland surface soils (2.82 +/- 3.29 mu mol CH4 g(-1) dry soil d(-1) production, 3.47 +/- 2.03 mu mol CH4 g(-1) dry soil d(-1) consumption), indicating the majority of production likely occurs at depth in lowland soils. Both gross and net fluxes from transplanted soils showed no effect of soil origin after four years, suggesting low resistance of CH4 cycling to global change drivers. Our results indicate the strength of the coastal forest CH4 sink is likely to decrease in proportion to sea-level rise. |
| 英文关键词 | Methanogen; Methanotroph; Methane oxidation; Salinity; Stable isotope |
| 语种 | 英语 |
| WOS研究方向 | Agriculture |
| WOS类目 | Soil Science |
| WOS记录号 | WOS:001224796100001 |
| 来源期刊 | SOIL BIOLOGY & BIOCHEMISTRY
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| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/304784 |
| 作者单位 | United States Department of Energy (DOE); Pacific Northwest National Laboratory; University System of Ohio; University of Toledo; University System of Maryland; University of Maryland College Park; United States Department of Energy (DOE); Pacific Northwest National Laboratory; Smithsonian Institution; Smithsonian Environmental Research Center; Yonsei University |
| 推荐引用方式 GB/T 7714 | . Methane flux from transplanted soil monoliths depends on moisture, but not origin[J],2024,193. |
| APA | (2024).Methane flux from transplanted soil monoliths depends on moisture, but not origin.SOIL BIOLOGY & BIOCHEMISTRY,193. |
| MLA | "Methane flux from transplanted soil monoliths depends on moisture, but not origin".SOIL BIOLOGY & BIOCHEMISTRY 193(2024). |
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