Availability of orchid mycorrhizal fungi on roadside trees in a tropical urban landscape

Urban expansion threatens biodiversity worldwide, therefore urban spaces need to be amenable to biodiversity conservation. On trees in urban environments, natural colonisation and successful translocation of epiphytic orchids are necessary to enhance urban biodiversity, and depend on the availabilit...

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Autores principales: Izuddin, Muhammad, Srivathsan, Amrita, Lee, Ai Lan, Yam, Tim Wing, Webb, Edward L.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6925147/
https://www.ncbi.nlm.nih.gov/pubmed/31863015
http://dx.doi.org/10.1038/s41598-019-56049-y
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author Izuddin, Muhammad
Srivathsan, Amrita
Lee, Ai Lan
Yam, Tim Wing
Webb, Edward L.
author_facet Izuddin, Muhammad
Srivathsan, Amrita
Lee, Ai Lan
Yam, Tim Wing
Webb, Edward L.
author_sort Izuddin, Muhammad
collection PubMed
description Urban expansion threatens biodiversity worldwide, therefore urban spaces need to be amenable to biodiversity conservation. On trees in urban environments, natural colonisation and successful translocation of epiphytic orchids are necessary to enhance urban biodiversity, and depend on the availability of compatible orchid mycorrhizal fungi (OMF). However, the extent of OMF presence and distribution, as well as niche requirements for the OMF, remain poorly studied. To identify and quantify OMF on urban trees as well as assess their suitability for native epiphytic orchids, we conducted high-throughput sequencing on tree bark and orchid root samples. OMF were detected at 60% of the study sites on 16% of 270 bark samples (from stem, fork, and branch microsites within each tree). OMF presence and richness on bark samples were related to multiple biophysical factors; in general, humus presence and precipitation levels were positively predictive of OMF presence and richness. We found Ceratobasidiaceae- and Serendipitaceae-associated OMF both on bark and within roots. Orchid species also showed differing mycorrhizal specificity. Sites associated with fungal genera Ceratobasidium, Rhizoctonia, and Serendipita were considered suitable habitats for seven orchid species. The results suggest that urban trees support OMF and are therefore suitable for native orchid species; however, OMF availability are largely constrained by biophysical factors. To maximise the likelihood of translocation success and consequent natural establishment, we propose that (micro)sites are screened for compatible OMF prior to any intervention.
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spelling pubmed-69251472019-12-24 Availability of orchid mycorrhizal fungi on roadside trees in a tropical urban landscape Izuddin, Muhammad Srivathsan, Amrita Lee, Ai Lan Yam, Tim Wing Webb, Edward L. Sci Rep Article Urban expansion threatens biodiversity worldwide, therefore urban spaces need to be amenable to biodiversity conservation. On trees in urban environments, natural colonisation and successful translocation of epiphytic orchids are necessary to enhance urban biodiversity, and depend on the availability of compatible orchid mycorrhizal fungi (OMF). However, the extent of OMF presence and distribution, as well as niche requirements for the OMF, remain poorly studied. To identify and quantify OMF on urban trees as well as assess their suitability for native epiphytic orchids, we conducted high-throughput sequencing on tree bark and orchid root samples. OMF were detected at 60% of the study sites on 16% of 270 bark samples (from stem, fork, and branch microsites within each tree). OMF presence and richness on bark samples were related to multiple biophysical factors; in general, humus presence and precipitation levels were positively predictive of OMF presence and richness. We found Ceratobasidiaceae- and Serendipitaceae-associated OMF both on bark and within roots. Orchid species also showed differing mycorrhizal specificity. Sites associated with fungal genera Ceratobasidium, Rhizoctonia, and Serendipita were considered suitable habitats for seven orchid species. The results suggest that urban trees support OMF and are therefore suitable for native orchid species; however, OMF availability are largely constrained by biophysical factors. To maximise the likelihood of translocation success and consequent natural establishment, we propose that (micro)sites are screened for compatible OMF prior to any intervention. Nature Publishing Group UK 2019-12-20 /pmc/articles/PMC6925147/ /pubmed/31863015 http://dx.doi.org/10.1038/s41598-019-56049-y Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Izuddin, Muhammad
Srivathsan, Amrita
Lee, Ai Lan
Yam, Tim Wing
Webb, Edward L.
Availability of orchid mycorrhizal fungi on roadside trees in a tropical urban landscape
title Availability of orchid mycorrhizal fungi on roadside trees in a tropical urban landscape
title_full Availability of orchid mycorrhizal fungi on roadside trees in a tropical urban landscape
title_fullStr Availability of orchid mycorrhizal fungi on roadside trees in a tropical urban landscape
title_full_unstemmed Availability of orchid mycorrhizal fungi on roadside trees in a tropical urban landscape
title_short Availability of orchid mycorrhizal fungi on roadside trees in a tropical urban landscape
title_sort availability of orchid mycorrhizal fungi on roadside trees in a tropical urban landscape
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6925147/
https://www.ncbi.nlm.nih.gov/pubmed/31863015
http://dx.doi.org/10.1038/s41598-019-56049-y
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