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Preserving Colias myrmidone in European cultural landscapes: requirements for the successful development from egg to higher larval stages at a Natura 2000 site in Romania

Publikation: Beiträge in Zeitschriften › Zeitschriftenaufsätze › Forschung › begutachtet

Authors

The endangered and declining butterfly species Colias myrmidone is sensitive to land-use changes and vulnerable in its immature stages. The requirements for its larval habitats are still largely unknown, which hinders appropriate management in protected areas. We examined the relation between the larval development of C. myrmidone and environmental variables at a Natura 2000 site in Romania. Individuals that reached higher larval stages had a higher cover of litter as well as a lower cover of forbs around their host plants than individuals that died in early larval stages or as eggs. Surviving individuals had less other host plants in their surrounding and were found on larger host plants. Surviving individuals were found further away from the tip of their hosts than individuals that were lost due to grazing. The grazing regime is of particular importance to ensure the successful development of C. myrmidone from egg to higher larval stages. There seems to be a trade-off between positions at the tip of the shoot with palatable leaves and positions further down that protect against grazing. Especially sheep grazing may cause high direct mortality. The higher amount of litter around surviving larvae indicates a better survival when the grazing pressure is very low, but still present to keep the habitat open. However, occasional heavy grazing events may reduce the cover of forbs.
OriginalspracheEnglisch
ZeitschriftJournal of Insect Conservation
Jahrgang25
Ausgabenummer4
Seiten (von - bis)643-655
Anzahl der Seiten13
ISSN1366-638X
DOIs
PublikationsstatusErschienen - 08.2021

Bibliographische Notiz

Funding Information:
Open Access funding enabled and organized by Projekt DEAL. The study was part of a project which was funded by the German Federal Environment Ministry’s Advisory Assistance Programme (AAP), supervised by the German Federal Agency for Nature Conservation (BfN) and the German Environment Agency (UBA). JL thankfully acknowledges financial support through a Junior Professorship for Research into the Sustainable Use of Natural Resources by the Robert-Bosch Foundation. The responsibility for the content of this publication lies with the authors.

Funding Information:
The study was part of a project which was funded by the German Federal Environment Ministry’s Advisory Assistance Programme (AAP), supervised by the German Federal Agency for Nature Conservation (BfN) and the German Environment Agency (UBA). JL thankfully acknowledges financial support through a Junior Professorship for Research into the Sustainable Use of Natural Resources by the Robert-Bosch Foundation. For help in the field, we thank Amy Newsom, Juliane Gallersdörfer, Agnes Kastal, Andreia Sidor, Timo Jaworek and James Silvey. We are grateful for organizational support by Peter Lengyel. Many thanks to all farmers who accepted us on their land and to the local authorities for collaboration. We appreciate the constructive feedback provided by two anonymous reviewers.

Publisher Copyright:
© 2021, The Author(s).

    Fachgebiete

  • Ökosystemforschung - Area-based conservation, Danube Clouded Yellow, Larval ecology, Low-intensity farmland, Management

Zugehörige Projekte

  • Nachhaltiger Schutz des bedrohten Regensburger Gelblings: Partizipation und Integration der rumänischen Bevölkerung in ein EU-Schutzgebietsmanagement

    Projekt: Forschung

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