Effects of waterlogging on carbon assimilate partitioning in the Zoige alpine wetlands revealed by (CO2)-C-13 pulse labeling
文献类型：SCI/SSCI论文
| 作者 | Gao J. Q.; Gao, J. J.; Zhang, X. W.; Xu, X. L.; Deng, Z. H.; Yu, F. H. |
| 发表日期 | 2015 |
| 关键词 | qinghai-tibetan plateau lolium-perenne soil dynamics rhizodeposition decomposition rhizosphere temperature grassland feedbacks |
| 英文摘要 | Waterlogging has been suggested to affect carbon (C) turnover in wetlands, but how it affects C allocation and stocks remains unclear in alpine wetlands. Using in situ (CO2)-C-13 pulse labelling, we investigated C allocation in both waterlogged and non-waterlogged sites in the Zoige wetlands on the Tibetan Plateau in August 2011. More than 50% of total C-13 fixed by photosynthesis was lost via shoot respiration. Shoots recovered about 19% of total C-13 fixed by photosynthesis at both sites. Only about 26% of total fixed C-13 was translocated into the belowground pools. Soil organic C pool accounted for 19% and roots recovered about 5-7% of total fixed C-13 at both sites. Waterlogging significantly reduced soil respiration and very little C-13 was lost via soil respiration in the alpine wetlands compared to that in grasslands. We conclude that waterlogging did not significantly alterC allocations among theC pools except the (CO2)-C-13 efflux derived from soil respiration and that shoots made similar contributions to C sequestration as the belowground parts in the Zoige alpine wetlands. Therefore, changes in waterlogging due to climate change will not affect C assimilate partitioning but soil C efflux. |
| 出处 | Scientific Reports |
| 卷 | 5 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 2045-2322 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/38436]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Gao J. Q.,Gao, J. J.,Zhang, X. W.,et al. Effects of waterlogging on carbon assimilate partitioning in the Zoige alpine wetlands revealed by (CO2)-C-13 pulse labeling. 2015. |
入库方式： OAI收割
来源：地理科学与资源研究所
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