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 483288
Title Do field margins enrich the diet of the Eurasian Skylark Alauda arvensis on intensive farmland?
Author(s) Ottens, H.J.; Kuiper, M.W.; Flinks, H.; Ruijven, J. van; Siepel, H.; Koks, B.J.; Berendse, F.; Snoo, G.R. de
Source Ardea 102 (2014)2. - ISSN 0373-2266 - p. 161 - 174.
DOI https://doi.org/10.5253/arde.v102i2.a6
Department(s) Plant Ecology and Nature Conservation
PE&RC
Publication type Refereed Article in a scientific journal
Publication year 2014
Keyword(s) false discovery rate - sown weed strips - food resources - nestling diet - agricultural intensification - bird populations - breeding-season - adjacent fields - perdix-perdix - prey quality
Abstract To help restore food availability for birds, arable field margins (extensively managed strips of land sown with grasses and forbs) have been established on European farmland. In this study we describe the effect of field margins on the diet of Eurasian Skylark nestlings and adults living on intensively managed Dutch farmland. We tested the hypotheses that field margins offer a higher diversity of invertebrate prey than intensively managed crops, and that the diet of nestlings receiving food from field margins will therefore be more diverse than that of other nestlings. Field margins had a greater variety of invertebrate prey groups to offer than the intensively managed crops. Coleoptera were the most frequently and most abundantly eaten prey group by both adults and nestlings. Together, Coleoptera, Diptera, Lepidoptera, Hymenoptera and Araneae accounted for 91% of the nestling diet. Nestlings ate larger prey items and a larger proportion of larvae than adults. Almost 75% of both adults and nestlings consumed plant material, perhaps indicating a scarcity of invertebrate resources. When provided with food from field margins, the mean number of invertebrate orders in the nestling diet increased significantly from 4.7 to 5.5 and the number of families from 4.2 to 5.8 per sample. Thus, birds that used field margins for foraging could indeed provide their young with more invertebrate prey groups than birds only foraging in crops and grassland.
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