中国科学院重庆绿色智能技术研究院机构知识库

QQ客服 官方微博 反馈留言

	Temperature sensitivity of biodegradable dissolved organic carbon increases with elevating humification degree in subtropical rivers
	Mao, Rong; Li, Si-Yue
	2018
摘要	Biodegradable dissolved organic carbon (BDOC) plays a key role in C cycle in inland waters. However, the magnitude of temperature sensitivity (Q10value) of BDOC is still unclear, and the effect of DOC quality on Q10value of BDOC is not well verified in these aquatic systems. Here, we used a laboratory incubation experiment to determine the Q10value of BDOC in 57 rivers in the Three Gorges Reservoir area, China, and then tested whether C quality-temperature hypothesis could be applied to BDOC in inland waters. We observed approximately twofold variations in Q10values of BDOC (1.42–2.67) in these rivers. Moreover, the tight positive relationship between the Q10values of BDOC and DOC humification index indicated the applicability of C quality-temperature hypothesis in subtropical rivers. In addition, the Q10values of BDOC exhibited a negative relationship with pH. These findings suggest that DOC quality and pH are powerful predictors of temperature sensitivity of BDOC in subtropical rivers. In conclusion, our results would help to improve the C models and predict the feedback between climate warming and C dynamics in inland waters. © 2018 Elsevier B.V.
DOI	10.1016/j.scitotenv.2018.04.256
发表期刊	Science of the Total Environment
ISSN	00489697
卷号	635页码:1367-1371
收录类别	SCI
语种	英语
EISSN	18791026