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Composition, structure and robustness of Lichen guilds.

Salva Duran-Nebreda1, Sergi Valverde2,3

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Summary
This summary is machine-generated.

Lichens form complex symbiotic networks where guilds, groups of lichens aiding each other, are modular and structured as clusters, not monolithic communities. Keystone species are crucial for network stability.

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Area of Science:

  • Ecology
  • Evolutionary Biology
  • Mycology

Background:

  • Symbiosis drives evolutionary innovation in complex organisms.
  • Lichens exemplify symbiosis's role in ecological success and diversification.
  • Previous lichen studies often focused on limited species, hindering understanding of large-scale phenomena like guilds.

Purpose of the Study:

  • To characterize the extensive network of lichen symbionts and their relationships.
  • To investigate the structure and composition of lichen guilds based on photobiont-mycobiont associations.

Main Methods:

  • Analysis of a large dataset comprising [FORMULA] publications on natural photobiont-mycobiont associations.
  • Network analysis to understand the modularity and clustering of lichen guilds.

Main Results:

  • The lichen symbiont network is modular, but its organization does not align with taxonomic classifications.
  • Lichen guilds are better represented as multiscale clusters with substructures, rather than uniform communities.
  • Keystone species act as critical bridges between guilds, highlighting their importance for network stability.

Conclusions:

  • Lichen guild structure is heterogeneous and multiscale, challenging traditional views.
  • The robustness of lichen networks relies on this complex guild structure and the presence of keystone species.
  • Disruption of keystone species could threaten the stability of the entire lichen network.