Nutrient inputs from the leaf decay of Cynodon dactylon (L.) Pers in the water level fluctuation zone of a Three Gorges tributary

Cynodon dactylon (L.) Pers (C. dactylon) is one of the dominant plants in the water level fluctuation (WLF) zone of the Three Gorges Reservoir (TGR) tributaries. However, the leaves of C. dactylon can decay to increase the inputs of nutrients under flood inundation, increasing the risk of eutrophica...

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Bibliographic Details
Published in:The Science of the total environment 2019-10, Vol.688, p.718-723
Main Authors: Chen, Xi, Zhang, Shuai, Liu, Dan, Yu, Zhiguo, Zhou, Shuang, Li, Ruijuan, Liu, Zhengxue, Lin, Junjie
Format: Article
Language:English
Subjects:
Eutrophication
Three Gorges reservoir
Total dissolved nitrogen
Total dissolved phosphorus
Water level fluctuating zone
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Summary:Cynodon dactylon (L.) Pers (C. dactylon) is one of the dominant plants in the water level fluctuation (WLF) zone of the Three Gorges Reservoir (TGR) tributaries. However, the leaves of C. dactylon can decay to increase the inputs of nutrients under flood inundation, increasing the risk of eutrophication in the TGR tributaries. Nutrient inputs from the leaf decay of C. dactylon in three interfaces, namely, water-sediment (WS), water-C. dactylon (WC) and water-sediment-C. dactylon (W-S-C), were estimated in a 180 d inundation experiment. The results showed that the kinetic processes of total dissolved nitrogen (TDN) and total dissolved phosphorus (TDP) input accorded with the power function equation: y = axb for the WS, WC and W-S-C interfaces (R2s > 0.72, p 
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2019.06.357