Cadmium accumulation in deer tongue grass ( Panicum clandestinum L.) and potential for trophic transfer to microtine rodents

Site 36 at the Crab Orchard National Wildlife Refuge includes a Cd-contaminated soil dominated by deer tongue grass ( Panicum clandestinum L.). Analysis of deer tongue grass from this site indicated that biomass and leaf surface area were reduced and that there was a linear relationship between both...

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Bibliographic Details
Published in:Environmental pollution (1987) 2007-07, Vol.148 (2), p.580-589
Main Authors: Sankaran, Renuka P., Ebbs, Stephen D.
Format: Article
Language:English
Subjects:
Animal, plant and microbial ecology
Animals
Applied ecology
Arvicolinae - metabolism
Bioaccumulation
Biological and medical sciences
Biological Availability
Biomass
Cadmium
Cadmium - analysis
Cadmium - pharmacokinetics
Decapoda
Deer tongue grass
Diet
Ecotoxicology, biological effects of pollution
Environmental Exposure - adverse effects
Environmental Monitoring - methods
Fundamental and applied biological sciences. Psychology
General aspects
Kidney - metabolism
Liver - metabolism
Mammalia
Microtus
Microtus ochrogaster
Microtus pinetorum
Panicum - chemistry
Panicum clandestinum
Plant Leaves - chemistry
Soil - analysis
Soil Pollutants - analysis
Soil Pollutants - pharmacokinetics
Trophic transfer
Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution
Voles
Zinc - analysis
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Summary:Site 36 at the Crab Orchard National Wildlife Refuge includes a Cd-contaminated soil dominated by deer tongue grass ( Panicum clandestinum L.). Analysis of deer tongue grass from this site indicated that biomass and leaf surface area were reduced and that there was a linear relationship between both plant bioavailable soil Cd and total soil Zn and tissue Cd concentration. The Cd concentrations in stems and leaves were also used to estimate the dietary Cd exposures that might be experienced by prairie voles ( Microtus ochrogaster) and pine voles ( M. pinetorum) consuming deer tongue grass. Renal and hepatic Cd burdens predicted from exclusive consumption of deer tongue grass would be comparable to those that have resulted in chronic toxicity in rodents. The results suggest that for the contaminated soil at Site 36, conditions could allow for the accumulation of Cd in deer tongue grass to concentrations that may pose an ecological risk. Deer tongue grass growing on a Cd-contaminated site accumulated Cd to concentrations that would be potentially toxic to microtine rodents using this plant as an exclusive food source.
ISSN:0269-7491
1873-6424
DOI:10.1016/j.envpol.2006.11.025