DOI: 10.1016/j.scitotenv.2020.136869
论文题名: A tale of three cities: Mercury in urban deciduous foliage and soils across land-uses in Poughkeepsie NY, Hartford CT, and Springfield MA USA
作者: Richardson J.B. ; Moore L.
刊名: Science of the Total Environment
ISSN: 489697
出版年: 2020
卷: 715 语种: 英语
英文关键词: Forest soils
; Industrial land use
; Mercury pollution
; Toxic metals
; Urban soils
Scopus关键词: Coal combustion
; Forestry
; Lakes
; Land use
; Soils
; Urban growth
; Forest soils
; Industrial land
; Mercury pollution
; Toxic metals
; Urban soils
; Soil pollution
; mercury
; concentration (composition)
; heavy metal
; land use change
; mercury (element)
; pollution exposure
; soil pollution
; toxic substance
; urban area
; Article
; concentration (parameter)
; Connecticut
; correlational study
; foliage
; forest soil
; land use
; Massachusetts
; New York
; nonhuman
; Populus
; priority journal
; quantitative analysis
; soil acidity
; soil pollution
; urban area
; urban rural difference
; Connecticut
; Hartford
; Missouri
; New York [New York (STT)]
; New York [United States]
; Springfield
; United States
; Populus
英文摘要: Mercury is a global pollutant that harms human and wildlife health through chronic exposure. The role of urban forests in Hg biogeochemistry has been understudied in cities without historical mining or current coal combustion. This study aimed to quantify total Hg concentrations and pools in urban forests to determine whether adjacent land-use impacts Hg accumulation. Three cities in the northeastern United States were studied: Hartford, Connecticut; Poughkeepsie, New York; and Springfield, Massachusetts. We identified ~20 urban forests sites in a ~10 km by ~10 km grid for each city and sampled foliage and soil at each site. Foliage from Populus exhibited significantly lower Hg concentrations (15.6 ± 2.1 ng g−1) than mean foliar Hg concentrations (23.7 ± 0.6 ng g−1) but most deciduous genera had comparable concentrations. Average forest floor Hg concentrations (195 ± 21 ng g−1) and Hg pools (1.9 ± 0.5 mg m−2) were similar to previous, non-urban studies in the region. Average A horizon (182 ± 19 ng g−1) and B horizon (125 ± 14 ng g−1) Hg concentrations were double those of regional forest soils. Mineral soil Hg pools for the top 30 cm (49 ± 6 mg m−2) averaged two to ten times higher than rural, montane forests in the region. Soil pH, LOI, and %clay were poorly correlated with mineral soil Hg concentrations. Instead, highest foliar and soil Hg concentrations and pools were in urban forests adjacent to high and medium intensity developed areas in Springfield and Hartford. To differentiate the impact of land-uses not captured by the National Land Cover Database (NLCD) system, we implemented new land-use categories. Industrial areas had highest foliar and soil Hg concentrations and pools of any land use. Our results show increasing land-use increases Hg accumulation in urban forests. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158324
Appears in Collections: 气候变化与战略
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作者单位: Department of Geosciences, University of Massachusetts Amherst01003, United States
Recommended Citation:
Richardson J.B.,Moore L.. A tale of three cities: Mercury in urban deciduous foliage and soils across land-uses in Poughkeepsie NY, Hartford CT, and Springfield MA USA[J]. Science of the Total Environment,2020-01-01,715