| 摘 要： |
Moss nitrogen (N) concentration and isotopic composition (delta N-15) values can reveal a better understanding of atmospheric N deposition patterns. Here, we summarize the moss N content and delta N-15 signatures using data compiled from 104 papers. Based on the dataset, we summarize the models for assessing the level and reduced (NHx): oxidised compounds (NOx) ratio of atmospheric N deposition. Results showed a historical increase in N concentration and N-15 depletion of specimen mosses close to anthropogenic N sources from intensive animal production and agricultural activities (NHx emission) since the 1800s. However, an increase of moss N with a less negative N-15 observed in the last three decades could be due to a substantial fossil fuel combustion contributed NOx emission. Spatially, N deposition in Europe decreased due to successful control actions, but Asia has become a hotspot for NHx emission from agriculture. The present results highlight the importance of moss N and delta N-15 values for estimating atmospheric N deposition patterns at spatio-temporal trends. (C) 2021 Elsevier B.V. All rights reserved. |
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