1. Host effects in high ectomycorrhizal diversity tropical rainforests on ultramafic soils in New Caledonia
- Author
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Sarah Gigante, Thomas Ibanez, Laurent Maggia, Julie Goxe, Kelly Letellier, Stéphane McCoy, Véronique Gourmelon, Monique Gardes, Jennifer Read, Jean-Michel Bellanger, Fabian Carriconde, Equipe Sol & Végétation (SolVeg), Institut Agronomique Néo-Calédonien (IAC), Evolution et Diversité Biologique (EDB), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées, Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Université Paul-Valéry - Montpellier 3 (UPVM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut de Recherche pour le Développement (IRD [France-Sud]), Vale Nouvelle-Calédonie, Partenaires INRAE, School of Biological Sciences, University of East Anglia [Norwich] (UEA), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), and Labex TULIP : ANR-10-LABX-41, ANR-11-IDEX-0002-02
- Subjects
0106 biological sciences ,F40 - Écologie végétale ,Biodiversity ,Plant Science ,Rainforest ,Biology ,010603 evolutionary biology ,01 natural sciences ,Ectosymbiosis ,[SDV.BV]Life Sciences [q-bio]/Vegetal Biology ,Forêt tropicale humide ,Ectomycorrhizal fungi ,Champignon du sol ,Ecology, Evolution, Behavior and Systematics ,Ultramafic soils ,New caledonian rainforests ,Ecology ,Ecological Modeling ,P34 - Biologie du sol ,Tropics ,Species diversity ,High fungal diversity ,Arillastrum ,respiratory system ,15. Life on land ,biology.organism_classification ,Biodiversity hotspot ,Ectomycorhize ,Cortinarius ,Host preference ,Biodiversité ,Host density ,human activities ,Communauté végétale ,010606 plant biology & botany - Abstract
International audience; Tropical rainforests have been thought to have low prevalence and diversity of ectomycorrhizal symbioses. However, to date, tropical regions have been poorly sampled for ectomycorrhizal fungi. Here, we investigated ectomycorrhizal fungal community diversity and the role of host plants in shaping this diversity in three main ultramafic rainforests in New Caledonia, an archipelago renowned for its exceptional plant diversity and recognized as a biodiversity hotspot. Sampling of ectomycorrhizal root tips and fruit bodies in Nothofagus aequilateralis-dominated, Arillastrum gummiferum-dominated and mixed rainforests showed high fungal diversity with, in total, 28 lineages and 311 operational taxonomic units (OTUs), of which 95% might be endemic. We also found that host preference and host density influenced ectomycorrhizal community composition and contributed to the high fungal diversity of New Caledonian rainforests. Finally, the/cortinarius lineage dominated the below- and above-ground communities, which suggests that this lineage plays a central role in ultramafic ecosystems functioning.
- Published
- 2019
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