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Litter beetles are indicators of ancient and current forest cover

Abstract : Saproxylic litter beetles, especially flightless ones, are indicators of temporal continuity of forest, which is an important element of biodiversity conservation in landscape management. However, little work has been done in comparing the importance of local and landscape-scale historical factors to explain species pattern. In this study, a set of historical, internal and landscape factors was investigated in forest litter beetle communities in a region with highly fragmented forests (Coteaux de Gascogne, SW France). We sampled 27 woodlots, divided in 9 triplets (ancient >10ha, ancient <3ha, recent <3ha), in three different subregions. We extracted past and present spatial patterns of the woodlots from old maps and aerial photographs. In each forest, 10 trees were sampled by litter sieving and beetles were extracted through the Berlese device. At the community level, geographical subregion, ancient and current forest ratios were the most explanatory variables in Correspondence Analysis. At the species level, 5 were indicators of ancient forest ratios and 4 of current ones. Compared to other species, flightless beetles turned out to be a better indicator of ancient forest ratio. Those results showed that the history of surrounding forest was more important for litter beetle than forest ancientness.
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https://hal.inrae.fr/hal-02738874
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Submitted on : Tuesday, June 2, 2020 - 9:20:39 PM
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  • HAL Id : hal-02738874, version 1
  • PRODINRA : 421976

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Eugénie Cateau, Sylvie Ladet, Pierre Alexis Herrault, David Sheeren, Hervé Brustel. Litter beetles are indicators of ancient and current forest cover. IUFRO Landscape Ecology Conference, Aug 2015, Tartu, Estonia. 236 p. ⟨hal-02738874⟩

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