%0 Journal Article
%T Atmospheric nitrogen deposition in Yangtze River Delta: insights gained from the nitrogen content and isotopic composition of the moss Haplocladium microphyllum
%A Changchun HUANG
%A Hao YANG
%A Rong FAN
%A Tao HUANG
%A Yanju YANG
%A Zhili CHEN
%J Atmospheric and Oceanic Science Letters
%D 2020
%R https://doi.org/10.1080/16742834.2019.1688629
%X ABSTRACT Simple and inexpensive estimation of the rates and sources of atmospheric nitrogen (N) deposition is critical for its effective mitigation in a region with different land-use types. In this study, the N content and N isotopic composition (¦Ä15N) of moss (Haplocladium microphyllum) tissues and precipitation at six sites with three land-use types (urban, suburban, and rural) were measured in the Yangtze River Delta. A significant linear relationship between moss N content and wet N deposition, and a consistent decrease trend for moss N content and wet N deposition from urban to suburban to rural areas were observed. More negative ¦Ä15N of suburban and rural mosses indicated N mainly released from agriculture and effluent, while the less negative ¦Ä15N of urban mosses were mainly influenced by fossil fuel combustion and traffic emissions. Although the negative moss ¦Ä15N indicates that reduced N dominates wet N deposition, there was no significant correlation between moss ¦Ä15N and the ratio of ammonium to nitrate (NH4 +/NO3 £¿). These results reveal that the moss N content and ¦Ä15N can be used as a complementary tool for estimating the rates and sources of wet N deposition in a region with different land-use types. Graphical abstrac
%U https://www.tandfonline.com/doi/full/10.1080/16742834.2019.1688629