Ectomycorrhizal fungal communities of secondary tropical forests dominated by Tristaniopsis in Bangka Island, Indonesia
Autoři:
Helbert aff001; Maman Turjaman aff002; Kazuhide Nara aff001
Působiště autorů:
Department of Natural Environmental Studies, The University of Tokyo, Kashiwa, Chiba, Japan
aff001; Forest Research and Development Centre (FRDC), Environment and Forestry Research, Development, Innovation Agency (FORDA), the Ministry of Environment and Forestry, Bogor, Indonesia
aff002
Vyšlo v časopise:
PLoS ONE 14(9)
Kategorie:
Research Article
doi:
https://doi.org/10.1371/journal.pone.0221998
Souhrn
In Southeast Asia, primary tropical rainforests are usually dominated by ectomycorrhizal (ECM) trees belonging to Dipterocarpaceae, although arbuscular mycorrhizal trees often outcompete them after disturbances such as forest fires and clear-cutting, thus preventing dipterocarp regeneration. In some secondary tropical forests, however, potentially ECM trees belonging to Tristaniopsis (Myrtaceae) become dominant and may help ECM dipterocarp forests to recover. However, we have no information about their mycorrhizal status in these settings. In this study, we analyzed ECM fungal communities in tropical secondary forests dominated by Tristaniopsis and investigated which ECM fungal species are shared with other tropical or temperate areas. In total, 100 samples were collected from four secondary forests dominated by Tristaniopsis on Bangka Island. ECM tips in the soil samples were subjected to molecular analyses to identify both ECM and host species. Based on a >97% ITS sequence similarity threshold, we identified 56 ECM fungal species dominated by Thelephoraceae, Russulaceae, and Clavulinaceae. Some of the ECM fungal species were shared between dominant Tristaniopsis and coexisting Eucalyptus or Quercus trees, including 5 common to ECM fungi recorded in a primary mixed dipterocarp forest at Lambir Hill, Malaysia. In contrast, no ECM fungal species were shared with other geographical regions, even with Tristaniopsis in New Caledonia. These results imply that secondary tropical forests dominated by Tristaniopsis harbor diverse ECM fungi, including those that inhabit primary dipterocarp forests in the same geographical region. They may function as refugia for ECM fungi, given that dipterocarp forests are disappearing quickly due to human activity.
Klíčová slova:
Biology and life sciences – Ecology – Ecosystems – Forests – Temperate forests – Tropical forests – Forest ecology – Ecological metrics – Species diversity – Organisms – Eukaryota – Fungi – Plants – Trees – Ecology and environmental sciences – Terrestrial environments – Earth sciences – Geomorphology – Topography – Landforms – Islands
Zdroje
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Článek vyšel v časopise
PLOS One
2019 Číslo 9
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