Spatial patterns, underlying drivers and conservation priorities of orchids in the central Himalaya

Koju, Laxmi; Shrestha, Nawal; Raskoti, Bhakta Bahadur; Ale, Rita; Ghimire, Narayan Prasad; Shrestha, Saugat

doi:10.1016/j.biocon.2023.110121

Cited by 5 publications

(1 citation statement)

References 72 publications

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“…The Orchidaceae is one of the most diverse and second-biggest families of flowering plants, with over 30,000 species. However, habitat loss, climate change, and anthropogenic issues are currently posing serious risks to the Orchidaceae (Koju et al 2023). For successful conservation of orchids, we should know about their distribution pattern and influencing factors over these pattern (Wen et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis of root-associated fungal diversity and community composition of two Satyrium species

Poudel,

Li,

Anbazhakan

et al. 2024

Preprint

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Root-associated endophytic fungi (REFs) residing within the host plant can significantly impact on the distribution and abundance of host species. The diversity and community composition of endophytic fungi connected to the roots of two terrestrial orchid species with contrasting distribution patterns, remain little explored. Therefore, we used amplicon sequencing method to explore and analyze the diversity and community composition of fungi associated with the roots of two Satyrium Sw. species, including the widely distributed Satyrium nepalense D. Don. and the narrowly distributed Satyrium yunnanense Rolfe. Our study has illuminated that REFs communities did not show significant difference according to the distribution pattern of host species statistically, because the S. yunnanense was rich in different endophytic fungi than S. nepalense. Anyway, S. yunnanense was dominated by uncul-tured_hygrocybe and S. nepalense was dominated by uncultured_fungus species separately. The result of beta-diversity indicated that there were significant differences in fungal com-munities between the two sample species with (P=0.003) value. It provides the strong evidence against the null hypothesis. Similarly, Linear discriminant analysis Effect Size (LEfSe) and Linear Discriminant Analysis (LDA) scored the two sample species as crucial by different biomarkers separately and significantly over the sample groups Satyrium nepalense (SN) and Satyrium yunnanense (SY) for their distribution and population stability. Therefore, the diversity and community composition of endophytic fungi are found to be independent on distribution pattern of host alone.

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Section: Introductionmentioning

confidence: 99%

Comparative analysis of root-associated fungal diversity and community composition of two Satyrium species

Poudel,

Li,

Anbazhakan

et al. 2024

Preprint

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Geographical pattern of the deviation between taxonomic, phylogenetic, and functional diversity and its implications for the conservation of Chinese orchids

Zhan,

Tan,

Liu

et al. 2024

Global Ecology and Conservation

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Fungal community characteristics of the last remaining habitat of three paphiopedilum species in China

Tian,

An,

Liu

et al. 2024

Sci Rep

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Paphiopedilum armeniacum, Paphiopedilum wenshanense and Paphiopedilum emersonii are critically endangered wild orchids. Their populations are under severe threat, with a dramatic decline in the number of their natural distribution sites. Ex situ conservation and artificial breeding are the keys to maintaining the population to ensure the success of ex situ conservation and field return in the future. The habitat characteristics and soil nutrient information of the last remaining wild distribution sites of the three species were studied. ITS high-throughput sequencing was used to reveal the composition and structure of the soil fungal community, analyze its diversity and functional characteristics, and reveal its relationship with soil nutrients. The three species preferred to grow on low-lying, ventilated and shaded declivities with good water drainage. There were significant differences in soil alkali-hydrolyzed nitrogen and available phosphorus among the three species. There were 336 fungal species detected in the samples. On average, there were different dominant groups in the soil fungal communities of the three species. The functional groups of soil fungi within their habitats were dominated by saprophytic fungi and ectomycorrhizae, with significant differences in diversity and structure. The co-occurrence network of habitat soil fungi was mainly positive. Soil pH significantly affected soil fungal diversity within their habitats of the three paphiopedilum species. The study confirmed that the dominant groups of soil fungi were significantly correlated with soil nutrients. The three species exhibit comparable habitat inclinations, yet they display substantial variations in the composition, structure, and diversity of soil fungi. The fungal functional group is characterized by a rich presence of saprophytic fungi, a proliferation of ectomycorrhizae, and a modest occurrence of orchid mycorrhizae. The symbiotic interactions among the soil fungi associated with these three species are well-coordinated, enhancing their resilience against challenging environmental conditions. There is a significant correlation between soil environmental factors and the composition of soil fungal communities, with pH emerging as a pivotal factor regulating fungal diversity. Our research into the habitat traits and soil fungal ecosystems of the three wild Paphiopedilum species has established a cornerstone for prospective ex situ conservation measures and the eventual reestablishment of these species in their native landscapes. Supplementary Information The online version contains supplementary material available at 10.1038/s41598-024-75185-8.

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Spatial patterns, underlying drivers and conservation priorities of orchids in the central Himalaya

Cited by 5 publications

References 72 publications

Comparative analysis of root-associated fungal diversity and community composition of two Satyrium species

Comparative analysis of root-associated fungal diversity and community composition of two Satyrium species

Geographical pattern of the deviation between taxonomic, phylogenetic, and functional diversity and its implications for the conservation of Chinese orchids

Fungal community characteristics of the last remaining habitat of three paphiopedilum species in China

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