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Could Tree-relatedMicrohabitats (TreMs) be relevant conservation forestry targets and/or biodiversity indicators?

Abstract : Tree-Related Microhabitats (Trems) are at stake for at least 2 reasons. First Biodiversity-friendly forestry practices are being developed and some of them focus on the retention or the active restoration of old-growth key features (CWD, snags, dead trees) among which are Trems. Second, the monitoring of Trems has been suggested to provide structural forest biodiversity indicators. But are available results from ecological studies at the stand scale sufficiently consistent to support the use of trems as indirect biodiv indicators or as conservation forestry targets? TReMs, i.e. morphological singularities borne by live or dead trees, are known to host a wide diversity of taxa. They play a wide range of pivotal biological roles : from simple shelter to breeding and foraging site. At the stand scale, they contribute to increase the structural heterogeneity which is in turn expected to favor biodiversity. But this trend has actually been shown to be very context-dependent throughoutr a wide range of forest conditions in France. At least for 4 categories of potential reasons could be raised to explain why trem-biodiversity relationships are so weak and variable. These reasons relate to TReM metrics or sampling, and Biodiversity metrics or sampling. We here highlighted the low significance, the low magnitude and the poor consistency or trem effects on biodiversity at the stand scale. Bearing in mind the importance of adequate sampling methods for biodiversity and trems, it should be acknowledged that further research is required to inspire sound guidelines.
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Conference papers
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https://hal.inrae.fr/hal-02606303
Contributor : Migration Irstea Publications <>
Submitted on : Saturday, May 16, 2020 - 12:12:45 PM
Last modification on : Wednesday, February 17, 2021 - 3:32:09 AM

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  • HAL Id : hal-02606303, version 1
  • IRSTEA : PUB00054922

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Laurent Larrieu, Christophe Bouget. Could Tree-relatedMicrohabitats (TreMs) be relevant conservation forestry targets and/or biodiversity indicators?. LIFE MIPP European Workshop Monitoring of saproxylic beetles and other insects protected in the European Union, May 2017, Mantova, Italy. pp.26. ⟨hal-02606303⟩

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