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Predominant contributions through lichen and fine litter to litterfall mercury deposition in a subalpine forest TEXT SIZE: A A A

Litterfall, typically referring to needles/leaves, may stand for >50% of the total mercury (Hg) deposition in forest ecosystems. By detailed categorisation, we reveal for the first time that the contributions through lichens and fine litter, together 9.98 mu g Hg m- 2 yr -1, could be as high as that in needle litter (9.96 mu g m- 2 yr -1) to the annual total Hg deposition (44.6 mu g m- 2 yr -1) in a subalpine forest in Switzerland. Noticeably, needle litter had the highest contribution (53%) to total Hg in the autumn litterfall but lichens and fine litter together predominated in other seasons (47-59%). Such a seasonal pattern is caused by the high ability of lichens and fine litter to accumulate Hg and the high needle litterfall in autumn, which is related to a good rainfall in summer followed by a dry period in autumn. The constantly higher Hg levels in lichens and fine litter than in needle litter together with similar seasonal patterns of litterfall during 2009-2019 and rainfall during 1980-2019 suggest that our finding can be generally valid. Here, we highlight not only the considerable role of non-needle litterfall in Hg deposition but also the association with weather for seasonal Hg dynamics in different litterfall components.

Publication name

 Environmental Research, Volume 229, Article Number 116005, DOI 10.1016/j.envres.2023.116005, Published JUL 15 2023, Early Access APR 2023


 Huang, Jen-How; Berg, Bjorn; Chen, Chaoyue; Thimonier, Anne; Schmitt, Maria; Osterwalder, Stefan; Alewell, Christine; Rinklebe, Jorg; Feng, Xinbin

Corresponding author(s) 

 Huang, Jen-How; Chen, Chaoyue
 jen-howhuang@mail.gyig.ac.cn; chenchaoyue@mail.gyig.ac.cn
 Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Peoples R China

Author(s) from IGCAS   Huang, Jen-How; Chen, Chaoyue; Feng, Xinbin

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