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Lead isotope ratios in moss for the assessment of transboundary pollutants in the Yatsugatake Mountains, central Japan

Lead isotope ratios in moss for the assessment of transboundary pollutants in the Yatsugatake... Transboundary atmospheric pollutants emitted from mainland Asia are transported to Japan and pose a serious threat to mountain ecosystems. Pb isotope ratios (207Pb/206Pb and 208Pb/206Pb) 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ecological Research Wiley

Lead isotope ratios in moss for the assessment of transboundary pollutants in the Yatsugatake Mountains, central Japan

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Publisher
Wiley
Copyright
© 2021 The Ecological Society of Japan
ISSN
0912-3814
eISSN
1440-1703
DOI
10.1111/1440-1703.12205
Publisher site
See Article on Publisher Site

Abstract

Transboundary atmospheric pollutants emitted from mainland Asia are transported to Japan and pose a serious threat to mountain ecosystems. Pb isotope ratios (207Pb/206Pb and 208Pb/206Pb) 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.

Journal

Ecological ResearchWiley

Published: May 1, 2021

Keywords: ; ; ; ;

References