Author(s) :
Wang Xun
;
Lin CheJen
;
Lu ZhiYun
;
Zhang Hui
;
Zhang YiPing
;
Feng XinBin
Author Affiliation :
State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China.
Author Email :
fengxinbin@vip.skleg.cn
,
Jerry.Lin@lamar.edu
Journal article
:
Journal of Geophysical Research: Biogeosciences
2016
Vol.121
No.8
pp.2096-2109
ref.many
Abstract :
Forest
ecosystemsecosystemsSubject Category: Habitats
see more details play an important role in the global
cyclingcyclingSubject Category: Natural Processes
see more details of
mercurymercurySubject Category: Chemicals and Chemical Groups
see more details (Hg). In this study, we characterized the Hg cycling at a remote evergreen broadleaf (EB) forest site in southwest China (Mount Ailao). The annual Hg input via litterfall is estimated to be 75.0±24.2 µg m
-2 yr
-1 at Mount Ailao. Such a quantity is up to 1 order of magnitude greater than those observed at remote temperate/boreal (T/B) forest sites. Production of litter
biomassbiomassSubject Category: Miscellaneous
see more details is found to be the most influential factor causing the high Hg input to the EB forest. Given their large areal coverage, Hg
depositiondepositionSubject Category: Miscellaneous
see more details through litterfall in EB forests is appropriately 9±5 Mg yr
-1 in China and 1086±775 Mg yr
-1 globally. The observed wet Hg deposition at Mount Ailao is 4.9±4.5 µg m
-2 yr
-1, falling in the lower range of those observed at 49T/B forest sites in North America and Europe. Given the data, the Hg deposition flux through litterfall is approximately 15 times higher than the wet Hg deposition at Mount Ailao. Steady Hg accumulation in decomposing litter biomass and Hg uptake from the environment were observed during 25 months of litter
decompositiondecompositionSubject Category: Miscellaneous
see more details. The size of the Hg pool in the organic horizon of EB forest floors is estimated to be up to 2-10 times the typical pool size in T/B forests. This study highlights the importance of EB forest ecosystems in global Hg cycling, which requires further assessment when more data become available in
tropical foreststropical forestsSubject Category: Vegetation Types
see more details.
ISSN :
2169-8953
DOI :
10.1002/2016JG003446
Record Number :
20163341859
Publisher :
Wiley-Blackwell
Location of publication :
Hoboken
Country of publication :
USA
Language of text :
English
Indexing terms for this abstract:
Descriptor(s) :
biomassbiomassSubject Category: Miscellaneous
see more details, boreal forestsboreal forestsSubject Category: Vegetation Types
see more details, broadleaved evergreen forestsbroadleaved evergreen forestsSubject Category: Vegetation Types
see more details, cyclingcyclingSubject Category: Natural Processes
see more details, decompositiondecompositionSubject Category: Miscellaneous
see more details, depositiondepositionSubject Category: Miscellaneous
see more details, ecosystemsecosystemsSubject Category: Habitats
see more details, forest litterforest litterSubject Category: Commodities and Products
see more details, forest soilsforest soilsSubject Category: Soil Types
see more details, forestsforestsSubject Category: Habitats
see more details, mercurymercurySubject Category: Chemicals and Chemical Groups
see more details, mountain areasmountain areasSubject Category: Habitats
see more details, mountain forestsmountain forestsSubject Category: Vegetation Types
see more details, organic horizonsorganic horizonsSubject Category: Miscellaneous
see more details, soil typessoil typesSubject Category: Soil Types
see more details, storagestorageSubject Category: Miscellaneous
see more details, subtropicssubtropicsSubject Category: Climate Related
see more details, tropical foreststropical forestsSubject Category: Vegetation Types
see more details
Identifier(s) :
duff, nutrient cycling, People's Republic of China, subtropical zones
Geographical Location(s) :
ChinachinaSubject Category: Geographic Entities
see more details, YunnanyunnanSubject Category: Geographic Entities
see more details
Broader term(s) :
APEC countriesapec countriesSubject Category: Institutions and Organisations
see more details, Developing Countriesdeveloping countriesSubject Category: Miscellaneous
see more details, East Asiaeast asiaSubject Category: Geographic Entities
see more details, AsiaasiaSubject Category: Geographic Entities
see more details, South Western Chinasouth western chinaSubject Category: Geographic Entities
see more details, ChinachinaSubject Category: Geographic Entities
see more details