TY - JOUR
T1 - Body metal concentrations and glycogen reserves in earthworms (Dendrobaena octaedra) from contaminated and uncontaminated forest soil
AU - Holmstrup, Martin
AU - Sørensen, Jesper Givskov
AU - Overgaard, Johannes
AU - Bayley, Mark
AU - Bindesbøl, Anne-Mette Høtbjerg
AU - Slotsbo, Stine
AU - Fisker, Karina Vincents
AU - Maraldo, Kristine
AU - Waagner, Dorthe
AU - Labouriau, Rodrigo
AU - Asmund, Gert
PY - 2011
Y1 - 2011
N2 - Stress originating from toxicants such as heavy metals can induce compensatory changes in the energy metabolism of organisms due to increased energy expenses associated with detoxification and excretion processes. These energy expenses may be reflected in the available energy reserves such as glycogen. In a field study the earthworm, Dendrobaena octaedra, was collected from polluted areas, and from unpolluted reference areas. If present in the environment, cadmium, lead and copper accumulated to high concentrations in D. octaedra. In contrast, other toxic metals such as aluminium, nickel and zinc appeared to be regulated and kept at low internal concentrations compared to soil concentrations. Lead, cadmium and copper accumulation did not correlate with glycogen reserves of individual worms. In contrast, aluminium, nickel and zinc were negatively correlated with glycogen reserves. These results suggest that coping with different metals in earthworms is associated with differential energy demands depending on the associated detoxification strategy.Detoxification and accumulation of cadmium and lead by earthworms carries little energetic expenses whereas strict internal regulation of aluminium and nickel has energetic costs.
AB - Stress originating from toxicants such as heavy metals can induce compensatory changes in the energy metabolism of organisms due to increased energy expenses associated with detoxification and excretion processes. These energy expenses may be reflected in the available energy reserves such as glycogen. In a field study the earthworm, Dendrobaena octaedra, was collected from polluted areas, and from unpolluted reference areas. If present in the environment, cadmium, lead and copper accumulated to high concentrations in D. octaedra. In contrast, other toxic metals such as aluminium, nickel and zinc appeared to be regulated and kept at low internal concentrations compared to soil concentrations. Lead, cadmium and copper accumulation did not correlate with glycogen reserves of individual worms. In contrast, aluminium, nickel and zinc were negatively correlated with glycogen reserves. These results suggest that coping with different metals in earthworms is associated with differential energy demands depending on the associated detoxification strategy.Detoxification and accumulation of cadmium and lead by earthworms carries little energetic expenses whereas strict internal regulation of aluminium and nickel has energetic costs.
KW - Bio-concentration factor
KW - Energy reserves
KW - Scope-for-growth
KW - Heavy metals
KW - Earthworms
U2 - 10.1016/j.envpol.2010.09.005
DO - 10.1016/j.envpol.2010.09.005
M3 - Journal article
C2 - 20870326
SN - 0269-7491
VL - 159
SP - 190
EP - 197
JO - Environmental Pollution
JF - Environmental Pollution
IS - 1
ER -