Estimating prey accessibility for waders : a problem still to be solved

Leyrer, Jutta and Exo, Klaus-Michael 2001, Estimating prey accessibility for waders : a problem still to be solved, Wader study group bulletin, vol. 96, pp. 60-63.

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Title Estimating prey accessibility for waders : a problem still to be solved
Author(s) Leyrer, Jutta
Exo, Klaus-Michael
Journal name Wader study group bulletin
Volume number 96
Start page 60
End page 63
Total pages 4
Publisher National Centre for Ornithology, International Wader Study Group
Place of publication Norfolk, England
Publication date 2001-12
ISSN 0260-3799
Keyword(s) short-billed waders
prey density
vertically mobile prey organisms
Summary Estimating the accessible prey fraction for short-billed waders, we used a new sampling device - the sediment- plane( Desholme t al. 1998) - to record prey density of the uppermost benthos communities in softbottom habitats. In contrast to "ordinary"core-samplers, the sediment plane allows a relatively quick sampling of the uppermost layers of the sediment and, thus, it should allow a more reliable estimate of the accessible benthos community especially of vertically mobile prey organisms such as polychaetes. To assess its usefulness, we compared samples collected with the sediment-plane that took only the uppermost 3cm of the sediment with samples taken with a core-sampler. These investigations showed significant differences between the two sampling methods. In comparison with the corresponding layer of the core samples, we found significantly higher numbers and a higher biomass for at least four polychaete species (e.g. Ragworm Nereis diversicolor) in the plane samples.Therefore, we recommend the use of the sediment-plane when studying the accessible fraction for foraging waders especially when studying short-billed species.
Language eng
Field of Research 060201 Behavioural Ecology
Socio Economic Objective 960802 Coastal and Estuarine Flora, Fauna and Biodiversity
HERDC Research category C1.1 Refereed article in a scholarly journal
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Document type: Journal Article
Collection: School of Life and Environmental Sciences
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