Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 420568
Title Contaminant exposure in relation to spatio-temporal variation in diet composition: A case study of the little owl (Athene noctua)
Author(s) Schipper, A.M.; Wijnhoven, S.; Baveco, J.M.; Brink, N.W. van den
Source Environmental Pollution 163 (2012). - ISSN 0269-7491 - p. 109 - 116.
DOI https://doi.org/10.1016/j.envpol.2011.12.020
Department(s) Soil Science Centre
CL - Ecological Models and Monitoring
CE - Molecular Ecology Ecotoxicology and Wildlife Management
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) river floodplains - small mammals - risk-assessment - cadmium accumulation - metal concentrations - food-chain - soil - predators - birds - heterogeneity
Abstract We assessed dietary exposure of the little owl Athene noctua to trace metal contamination in a Dutch Rhine River floodplain area. Diet composition was calculated per month for three habitat types, based on the population densities of six prey types (earthworms, ground beetles and four small mammal species) combined with the little owl’s functional response to these prey types. Exposure levels showed a strong positive relationship with the dietary fraction of earthworms, but also depended on the dietary fraction of common voles, with higher common vole fractions resulting in decreasing exposure levels. Spatio-temporal changes in the availability of earthworms and common voles in particular resulted in considerable variation in exposure, with peaks in exposure exceeding a tentative toxicity threshold. These findings imply that wildlife exposure assessments based on a predefined, average diet composition may considerably underestimate local or intermittent peaks in exposure. --------------------------------------------------------------------------------
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