期刊
ECOLOGICAL RESEARCH
卷 36, 期 3, 页码 401-408出版社
WILEY
DOI: 10.1111/1440-1703.12205
关键词
biomonitoring; East Asia; elevation; slope aspect; transboundary pollutant
类别
资金
- Japan Society for the Promotion of Science [16K00566]
- Research Institute for Humanity and Nature
- Grants-in-Aid for Scientific Research [16K00566] Funding Source: KAKEN
The study examined the impact of transboundary pollutants from mainland Asia on the Yatsugatake Mountains, finding that the Pb isotope ratios in moss were not significantly affected by transboundary lead pollutants. The sensitivity of moss to transboundary pollutants varies depending on the type of pollutant.
Transboundary atmospheric pollutants emitted from mainland Asia are transported to Japan and pose a serious threat to mountain ecosystems. Pb isotope ratios (Pb-207/Pb-206 and Pb-208/Pb-206) of the transboundary pollutants are generally higher than those that characterize domestic pollutants in Japan. Hence, this study examined the influence of transboundary pollutants on the Yatsugatake Mountains by detecting the higher Pb isotope ratios in moss. Based on this examination, we discussed the usefulness of Pb isotope ratios in moss for monitoring transboundary pollutants. As northwesterly-westerly winds transport these pollutants to Japan, we hypothesized that the Pb isotope ratios in moss would be higher on the western slopes of the mountains than on the eastern slopes. Furthermore, this difference would be more apparent at higher elevations because of the smaller influence of domestic Pb pollutants. Contrary to these hypotheses, all the Pb isotope ratios in moss were within the ranges of domestic Pb pollutants across the study area, indicating that the influence of transboundary Pb pollutants on moss was small. Notably, these responses of moss to transboundary Pb pollutants differ from those to transboundary nitrogen pollutants. These results imply that the sensitivity of moss to transboundary pollutants largely depends on pollutant types.
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