2026-10-14T05:51:33Z
https://api.figshare.com/v2/oai
oai:figshare.com:article/33981457
2026-09-24T10:44:08Z
category_15
category_272
category_873
category_39
category_734
category_69
category_133
portal_63
item_type_3
month_year_09_2026
Microtopography and Seasonal Soil Moisture Govern
Methylmercury Dynamics in Upland Soils of a Subtropical Coastal Montane
Watershed
Xizi Yang (11150567)
Martin Tsz-Ki Tsui (1606915)
Zengchen Yu (25103500)
Chenzi Yang (319499)
Mengwei Yuan (4334875)
Shaoyi Wang (179668)
Ganxing Liu (25103503)
Luming Yang (722057)
Lin Liu (74495)
Neuroscience
Environmental Sciences not elsewhere classified
Chemical Sciences not elsewhere classified
Ecology
Biological Sciences not elsewhere classified
Inorganic Chemistry
Plant Biology
supported model within
model candidate set
fine spatial scales
surface soils across
site level (<
elevation forest zone
elevation forest sites
2 </ sup
thg – mehg
level elevation
elevation sites
zone contrasts
upland soils
although site
>< sup
elevation shrubland
r </
p </
n </
widely known
wet seasons
wet season
statistically significant
southern china
rate adjustment
plan curvature
neurotoxic methylmercury
important sinks
hong kong
grassland zones
elevational gradient
changed little
11 ),
Vegetated landscapes
are widely known as important sinks of mercury
(Hg) but the controls on the production of neurotoxic methylmercury
(MeHg) in terrestrial upland ecosystems remain unresolved, particularly
at fine spatial scales. In this study, we investigated the distribution
of total Hg (THg) and MeHg in surface soils across an elevational
gradient in a subtropical coastal montane watershed separately in
dry and wet seasons at Hong Kong of southern China. Mean surface soil
THg was the highest in the lower-elevation forest zone and at lower
levels in the middle- and upper-elevation shrubland/grassland zones.
Topsoil (0–4 cm) MeHg increased from dry to wet season at lower-elevation
forest sites and decreased or changed little at most upper-elevation
sites, although site-level elevation-zone contrasts were not statistically
significant after false-discovery-rate adjustment. At the site level
(<i>n</i> = 11), the best-supported model within a 12-model
candidate set for seasonal topsoil MeHg change included seasonal moisture
change, plan curvature, and inorganic Hg (IHg = THg – MeHg;
adjusted <i>R</i><sup>2</sup> = 0.758, <i>p</i> = 0.0043), implying exploratory watershed-scale associations among
moisture, microtopography, Hg substrate, and MeHg heterogeneity.
2026-09-24T00:00:00Z
Dataset
Dataset
10.1021/acsomega.6c06624.s002
https://figshare.com/articles/dataset/Microtopography_and_Seasonal_Soil_Moisture_Govern_Methylmercury_Dynamics_in_Upland_Soils_of_a_Subtropical_Coastal_Montane_Watershed/33981457
CC BY-NC 4.0