Holm Oak (Quercus ilex L.) canopy as interceptor of airborne trace elements and their accumulation in the litter and topsoil

被引：34

作者：

Fantozzi, Federica ^{[1
]}

Monaci, Fabrizio ^{[1
]}

Blanusa, Tijana ^{[2
,3
]}

Bargagli, Roberto ^{[1
]}

机构：

[1] Univ Siena, Dept Environm Sci G Sarfatti, I-53100 Siena, Italy

[2] Univ Reading, Sch Agr Policy & Dev, Reading RG6 6AR, Berks, England

[3] Royal Hort Soc, Dept Plant Sci, Woking GU23 6QB, Surrey, England

来源：

ENVIRONMENTAL POLLUTION | 2013年 / 183卷

关键词：

Urban environment; Airborne metals; Quercus ilex; Leaves litter; Topsoil; Leaves; AIR-POLLUTION; URBAN ENVIRONMENTS; LEAVES; ECOSYSTEM; METALS; OZONE; BIODIVERSITY; THROUGHFALL; RESPONSES; LICHENS;

D O I：

10.1016/j.envpol.2012.11.037

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

We investigated the role of urban Holm Oak (Quercus ilex L.) trees as an airborne metal accumulators and metals' environmental fate. Analyses confirmed Pb, Cd, Cu and Zn as a main contaminants in Siena's urban environment; only Pb concentrations decreased significantly compared to earlier surveys. Additionally, we determined chemical composition of tree leaves, litter and topsoil (underneath/outside tree crown) in urban and extra-urban oak stands. Most notably, litter in urban samples collected outside the canopy had significantly lower concentrations of organic matter and higher concentrations of Pb, Cu, Cd and Zn than litter collected underneath the canopy. There was a greater metals' accumulation in topsoil, in samples collected under the tree canopy and especially near the trunk ('stemflow area'). Thus, in urban ecosystems the Holm Oak stands likely increase the soil capability to bind metals. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：89 / 95

页数：7

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