Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14477 |
Punching above their weight: Large release of greenhouse gases from small agricultural dams | |
Ollivier, Quinn R.1; Maher, Damien T.2; Pitfield, Chris3; Macreadie, Peter I.1 | |
2019-02-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2019 |
卷号 | 25期号:2页码:721-732 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia |
英文摘要 | Freshwater ecosystems play a major role in global carbon cycling through the breakdown of organic material and release of greenhouse gases (GHGs). Carbon dioxide (CO2) and methane (CH4) emissions from lakes, wetlands, reservoirs and small natural ponds have been well studied, however, the GHG emissions of highly abundant, small-scale (<0.01 km(2)) agricultural dams (small stream and run-off impoundments) are still unknown. Here, we measured the diffusive CO2 and CH4 flux of 77 small agricultural dams within south-east Australia. The GHG emissions from these waterbodies, which are currently unaccounted for in GHG inventories, amounted to 11.12 +/- 2.59 g CO2-equivalent m(2)/day, a value 3.43 times higher than temperate reservoir emissions. Upscaling these results to the entire state of Victoria, Australia, resulted in a farm dam CO2-equivalent/day emission rate of 4,853 tons, 3.1 times higher than state-wide reservoir emissions in spite of farm dams covering only 0.94 times the comparative area. We also show that CO2 and CH4 emission rates were both significantly positively correlated with dissolved nitrate concentrations, and significantly higher in livestock rearing farm dams when compared to cropping farm dams. The results from this study demonstrate that small agricultural farm dams can be a major source of greenhouse gas emissions, thereby justifying their inclusion in global carbon budgets. |
英文关键词 | agriculture carbon dioxide dam emissions impoundment lake methane |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000456028900027 |
WOS关键词 | CARBON-DIOXIDE ; FRESH-WATER ; HYDROELECTRIC RESERVOIRS ; NUTRIENT LIMITATION ; TRANSFER VELOCITIES ; METHANE EMISSIONS ; GROUNDWATER DISCHARGE ; TROPICAL RESERVOIR ; NITROUS-OXIDE ; BOREAL LAKES |
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/17712 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Deakin Univ, Sch Life & Environm Sci, Ctr Integrat Ecol, Geelong, Vic, Australia; 2.Southern Cross Univ, Southern Cross Geosci, Lismore, NSW, Australia; 3.Corangamite Catchment Management Author, Colac, Vic, Australia |
推荐引用方式 GB/T 7714 | Ollivier, Quinn R.,Maher, Damien T.,Pitfield, Chris,et al. Punching above their weight: Large release of greenhouse gases from small agricultural dams[J]. GLOBAL CHANGE BIOLOGY,2019,25(2):721-732. |
APA | Ollivier, Quinn R.,Maher, Damien T.,Pitfield, Chris,&Macreadie, Peter I..(2019).Punching above their weight: Large release of greenhouse gases from small agricultural dams.GLOBAL CHANGE BIOLOGY,25(2),721-732. |
MLA | Ollivier, Quinn R.,et al."Punching above their weight: Large release of greenhouse gases from small agricultural dams".GLOBAL CHANGE BIOLOGY 25.2(2019):721-732. |
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