Invertebrate food sources for waterbirds provided by the reconstructed wetland of Nyirkai-Hany, northwestern Hungary

Horvath, Zsofia, Ferenczi, Marta, Mora, Arnold, Vad, Csaba Ferenc, Ambrus, Andras, Forro, Laszlo, Szovenyi, Gergely and Andrikovics, Sandor 2012, Invertebrate food sources for waterbirds provided by the reconstructed wetland of Nyirkai-Hany, northwestern Hungary, Hydrobiologia, vol. 697, no. 1, pp. 59-72, doi: 10.1016/10.1007/s10750-012-1170-5.

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Title Invertebrate food sources for waterbirds provided by the reconstructed wetland of Nyirkai-Hany, northwestern Hungary
Author(s) Horvath, Zsofia
Ferenczi, Marta
Mora, Arnold
Vad, Csaba Ferenc
Ambrus, Andras
Forro, Laszlo
Szovenyi, Gergely
Andrikovics, Sandor
Journal name Hydrobiologia
Volume number 697
Issue number 1
Start page 59
End page 72
Total pages 14
Publisher Springer
Place of publication Dordrecht, The Netherlands
Publication date 2012-12-07
ISSN 0018-8158
Keyword(s) invertebrate biomass
waterbird trophic guild
wetland restoration
Summary The Nyirkai-Hany wetland reconstruction area in northwestern Hungary is now designated as a Ramsar and a Natura 2000 site. It was created in 2001–2002 by the Fertő-Hanság National Park Directorate to restore a part of the formerly drained large wetland called Hanság and to offer waterbirds a suitable habitat for feeding and breeding. We focused on this aim of the restoration project and studied the temporal and spatial variation in abundance of birds and their invertebrate prey in this newly created wetland. From April 2007 until May 2008, we sampled plankton, nekton and benthos of different habitats monthly and monitored waterbirds weekly on the three different areas of the Nyirkai-Hany. During our investigations, 135 invertebrate and 53 waterbird species were recorded. Benthos and macrophyte decomposition accelerating guilds were the most abundant waterbird guilds—besides the dominant grazing importer material transporter guild, represented primarily by geese—in the Nyirkai-Hany. Zooplankton assemblages primarily consisted of small species not easily used as a food by planktivorous waterbirds. The low density of zoobenthic biomass and the small extent of shallow water mudflats probably accounted for the scarcity of the bioturbing guild group of birds. Nektonic biomass varied greatly among locations having different vegetation types, was greatest in the shallow water areas dominated by Typha, Carex and Phragmites species and lowest at offshore vegetation-free sites. Chironomids, mayflies and odonates were especially abundant and their biomass significantly correlated with several waterbird species, mainly belonging to the macrophyte decomposition accelerating guild (e.g. Anas platyrynchos, Fulica atra). This guild itself, which has increased in abundance in recent years, showed an exceptionally strong correlation with odonate abundance. These results indicate the growing importance of the Nyirkai-Hany wetland area as a foraging site for waterbirds.
Notes From the issue entitled "Limnology and Aquatic Birds: Monitoring, Modelling and Management"
Language eng
DOI 10.1016/10.1007/s10750-012-1170-5
Field of Research 069999 Biological Sciences not elsewhere classified
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2012, Springer Science+Business Media B.V.
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