Disentangling the importance of space and host tree for the beta-diversity of beetles, fungi, and bacteria: Lessons from a large dead-wood experiment


Rieker D., Krah F., Gossner M. M. , Uhl B., Ambarli D., Baber K., ...More

Biological Conservation, vol.268, 2022 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 268
  • Publication Date: 2022
  • Doi Number: 10.1016/j.biocon.2022.109521
  • Journal Name: Biological Conservation
  • Journal Indexes: Science Citation Index Expanded, Scopus, Academic Search Premier, PASCAL, Aerospace Database, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, CAB Abstracts, Communication Abstracts, Environment Index, Greenfile, Metadex, Public Affairs Index, Veterinary Science Database, Civil Engineering Abstracts
  • Keywords: Beta-partitioning, Cross-taxonomic, Forest conservation, Regional, Saproxylic, Spatial scale, Tree species, SPECIES RICHNESS, PARTITIONING DIVERSITY, SAPROXYLIC BEETLES, INHABITING FUNGI, COMMUNITY, FORESTS, DECOMPOSITION, BIODIVERSITY, DISPERSAL, RARE

Abstract

© 2022 Elsevier LtdForestry in Europe changed the tree species composition and reduced dead-wood amount and heterogeneity, and therefore negatively affected saproxylic diversity. Efficient conservation requires knowledge about the importance of the relevant diversity drivers across taxa. We examined the relative importance of space vs. host for saproxylic diversity at a spatial extend of 600 km in Germany. Further, we disentangled effects of among regions, forest stands, host clades, and tree species on saproxylic diversity. This allows inferences for spatial- and host tree-related conservation strategies. Beetle, fungal sporocarp, molecular-derived fungal, and bacterial communities were studied in a large nested dead-wood experiment comprising 11 tree species. We used multiplicative diversity partitioning to assess the diversity of rare, typical, and dominant species. The beta-diversity of beetles and fungal sporocarps was equally explained by space and host, but that of molecular fungi and bacteria mainly by the host. Across taxa, beta-diversity was higher among forest stands than among regions. However, for beetles and fungal sporocarps, differences among regions were also important. Host tree clade and host tree species were important for beetle and host clade for fungal sporocarp beta-diversity. Host tree species was more important than host clade for the beta-diversity of molecular fungi and bacteria. The divergent response of different taxa to space and host calls into question the use of a simple spatially-centered or host-centered strategy. Instead, a high dead-wood tree species diversity on a broad spatial coverage at the national scale in temperate European forests is necessary to maintain rare and abundant species.