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Heavy metals and litter decomposition in coniferous forests

Title data

Virzo de Santo, Amalia ; Fierro, Angelo ; Berg, Björn ; Rutigliano, Flora Angela ; de Marco, A.:
Heavy metals and litter decomposition in coniferous forests.
In: Violante, Antonio (ed.): Soil mineral organic matter microorganism interactions and ecosystem health. Band 1. Dynamics, mobility and transformation of pollutants and nutrients. - Amsterdam : Elsevier , 2002 . - pp. 63-78 . - (Developments in Soil Science ; 28A )
ISBN 0-444-51038-9

Abstract in another language

The dynamics of Mn, Zn, Fe, Cu, Pb, and Cd, during litter decomposition was studied to understand how litter and soil metal concentrations influence the accumulation and/or the release of metals. Three types of leaf litters (green and brown leaves of Populus tremula L., green leaves of Betula pubescens Ehrh. and four types of needle litters (green and brown needles of Pinus sylvestris L., brown needles of Pinus contorta L. and Pinus pinea L.), differing for heavy metal concentrations, were incubated at two unpolluted coniferous forest sites: a temperate silver fir (Abies alba Mill.) forest at M. Taburno, southern Italy, and a boreal Scots pine (Pinus sylvestris L.) forest at site Jädraås, Sweden. Compared to the Scots pine forest the humic surface horizon of the silver fir forest had a higher pH, higher concentrations of available Cu and Cd and lower Fe concentration. After a period of about 900 days, all litter types were more decomposed at M. Taburno than at Jädraås. Zn, Fe, Pb and Cd concentrations in leaf and needle litters increased at both sites; Cu concentrations increased only in the silver fir forest; Mn concentration decreased in the litter richest in Mn and increased in the litters poorest in Mn. Litter decomposition in an early phase (0 up to 528/565 days) was significantly and positively correlated to initial Cu and Cd concentrations in litter. In a late phase (528/565 up to 918/929 days) decomposition was correlated significantly and negatively with litter Zn and Cu, and significantly and positively with litter Mn concentration at the start (528/565 days) of the period. At both sites increases in absolute amounts of Fe, Cd, and Pb were observed in all litters; however P. pinea, which showed the highest initial concentration of Pb, released Pb during decomposition. All litters released Cu at Jädraås and accumulated Cu at M. Taburno. Zn was released at both sites from all leaf litters and from the needle litter of P.contorta. Mn was released at both sites from all litters except the litter of P. tremula which accumulated Mn at Jädraås. The results indicate that heavy metal accumulation or release may depend on the gradient of metal concentration between litter and soil, on the pH of the soil, and on the capacity of litter to bind metal; atmospheric deposition could account at least partly for the increase of absolute amounts of Pb, Fe, and Cu at M. Taburno.

Further data

Item Type: Article in a book
Refereed: No
Additional notes: BAYCEER9528
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Soil Ecology
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 21 Dec 2015 07:59
Last Modified: 19 Sep 2016 05:57
URI: https://eref.uni-bayreuth.de/id/eprint/29132