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Journal of Insect Conservation

, Volume 18, Issue 4, pp 745–751 | Cite as

The role of a mound-building ecosystem engineer for a grassland butterfly

  • Merle Streitberger
  • Stefan Rose
  • Gabriel Hermann
  • Thomas Fartmann
SHORT COMMUNICATION

Abstract

Both land use intensification and abandonment within grasslands lead to a homogenisation of vegetation structure. Therefore, specially structured microsites such as vegetation gaps with bare ground play an important role for species conservation within grasslands. Vegetation gaps are crucial for the establishment of low-competitive plant species and offer special microclimatic conditions essential for the development of the immature stages of many invertebrate species. The influence of small-scale soil disturbance in the form of mounds created by ecosystem engineers such as ants or moles on biodiversity is therefore of special scientific concern. The effects of mound-building species on plant species diversity have been extensively studied. However, knowledge on the significance of these species for the conservation of other animals is rare. In this study we analyse the importance of mounds created by the European mole (Talpa europaea) as an oviposition habitat for the small copper (Lycaena phlaeas) within Central European mesotrophic grasslands. Our study showed that host plants occurring at molehills were preferred for oviposition. Oviposition sites were characterised by an open vegetation structure with a high proportion of bare ground (with a mean coverage of about 50 %), a low cover of herbs and low-growing vegetation (mean height: 4.5 cm). Our study clearly illustrates the importance of small-scale soil disturbance for immature stages of L. phlaeas and the conservation of this species within mesotrophic grasslands. Mound-building ecosystem engineers, such as T. europaea, act as important substitutes for missing dynamics within mesotrophic grasslands by diversifying vegetation structure and creating small patches of bare soil.

Keywords

Bare ground Conservation Disturbance Microclimate Molehill Oviposition 

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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Merle Streitberger
    • 1
  • Stefan Rose
    • 1
  • Gabriel Hermann
    • 2
  • Thomas Fartmann
    • 1
    • 3
  1. 1.Department of Community Ecology, Institute of Landscape EcologyUniversity of MünsterMünsterGermany
  2. 2.Working Group for Animal Ecology and PlanningFilderstadtGermany
  3. 3.Ecology, Department of Biology/ChemistryUniversity of OsnabrückOsnabrückGermany

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