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Articles

Distribution, population size and conservational status of the regionally endangered Large Banded Grasshopper (Arcyptera fusca) in Hungary (Orthoptera: Acrididae)

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Pages 175-182 | Accepted 01 Feb 2024, Published online: 28 Feb 2024
 

Summary

The abandonment of grasslands is a major threat to the local biodiversity of these habitats. Secondary succession may have a negative effect on species richness, especially in mountain meadows. The Large Banded Grasshopper, Arcyptera fusca (Pallas, 1773) is a typical example throughout Europe. According to former publications and our field survey of 2021, the extant number of populations of this species in Hungary has decreased from 31 to eight in the last decades. Based on the population size estimation carried out in 2021, some of the recent populations of A. fusca in Hungary count only dozens of adult specimens, while the largest ones consist of several hundreds. Their habitats cover ca. 40 hectares in all, in the North Hungarian Mountains. According to the IUCN guidelines, A. fusca should be considered endangered (EN) in Hungary. Our results show that active conservational measures with long term monitoring are important, and necessary to preserve this species together with its biodiversity-rich mountainous habitats in Hungary.

Résumé

Répartition, taille de la population et état de conservation du criquet bariolé (Arcyptera fusca), une espèce menacée au niveau régional en Hongrie (Orthoptera : Acrididae). L'abandon des prairies constitue une menace majeure pour la biodiversité locale de ces habitats. La succession secondaire peut avoir un effet négatif sur la richesse spécifique, notamment dans les prairies de montagne. Le criquet bariolé, Arcyptera fusca (Pallas, 1773) en est un exemple typique dans toute l'Europe. Selon des publications antérieures et notre enquête de terrain de 2021, le nombre de populations existantes de cette espèce en Hongrie est passé de 31 à huit au cours des dernières décennies. D’après l’estimation de la taille de la population réalisée en 2021, certaines des populations actuelles d’A. fusca en Hongrie ne comptent que quelques dizaines de spécimens adultes, tandis que les plus grandes en comptent plusieurs centaines. Leurs habitats couvrent environ 40 hectares au total, dans les montagnes du nord de la Hongrie. Selon les catégories de l'UICN, A. fusca devrait être considéré comme en danger (EN) en Hongrie. Nos résultats montrent que des mesures de conservation actives, avec une surveillance à long terme, sont importantes et nécessaires pour préserver cette espèce ainsi que ses habitats montagneux riches en biodiversité en Hongrie.

Acknowledgements

The authors are grateful for the staff of the Bükk, Duna-Ipoly and Aggtelek National Park Directorates for their permission and help in our study. We would like to thank Antal Nagy, Anton Krištín, Arnold Erdélyi and Barnabás Nagy† for sharing their data about the occurrences and status of some populations of A. fusca. We are also grateful for the Hungarian Natural History Museum for its permission to study the Orthoptera collection and for Viktória Szőke for her help in the Museum. We also thank Miklós Laczi for his help in the statistics and Sára Márialigeti for the English proofreading. We thank the reviewers for the useful comments and suggestions that helped us to improve our manuscript.

Disclosure statement

No potential conflict of interest was reported by the author(s).

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