Spread of metals through an invertebrate food chain as influenced by a plant that hyperaccumulates nickel |
| |
Authors: | Lynsey R Peterson Victoria Trivett Alan JM Baker Carlos Aguiar A Joseph Pollard |
| |
Institution: | 1.Department of Biology, Furman University, Greenville SC 29613, USA,US;2.Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, UK,UK;3.School of Botany, University of Melbourne, Melbourne, Victoria 3010, Australia,AU;4.Departamento de Biologia, Escola Superior Agrária de Bragan?a, Aptdo 1172, 5301-855 Bragan?a, Portugal,PT |
| |
Abstract: | Summary. Hyperaccumulation of metals in the shoot system of
plants is uncommon, yet taxonomically and geographically widespread. It
may have a variety of functions, including defense against herbivores.
This study investigated the effects of hyperaccumulation on metal
concentrations across trophic levels. We collected plant material, soil,
and invertebrates from Portuguese serpentine outcrops whose vegetation
is dominated by the nickel hyperaccumulator Alyssum pintodasilvae.
Samples were analyzed for nickel, chromium, and cobalt. Grasshoppers,
spiders, and other invertebrates collected from sites where A.
pintodasilvae was common had significantly elevated concentrations of
nickel, compared to nearby sites where this hyperaccumulator was not
found. Chromium and cobalt, occurring in high concentrations in the
serpentine soil but not accumulated by A. pintodasilvae, were not
elevated in the invertebrates. Therefore, it appears likely that a flux
of nickel to herbivore and carnivore trophic levels is specifically
facilitated by the presence of plants that hyperaccumulate this metal.
The results may be relevant to the development of phytoremediation and
phytomining technologies, which use plants to extract metals from the
soil.
Reveived 22 August 2002; accepted 2 April 2003.
R1D="
Correspondence to: A. J. Pollard, e-mail:joe.pollard@furman.edu |
| |
Keywords: | ,Hyperaccumulation –, trace elements –,phytoremediation –, phytomining –, Alyssum |
本文献已被 SpringerLink 等数据库收录! |
|