First record of North American fungus Rhizopogon pseudoroseolus in Australia and prediction of its occurrence based on climatic niche and symbiotic partner preferences

Abstract

In 2017 a North American fungus, Rhizopogon pseudoroseolus (Boletales, Basidiomycota), formerly known in Oceania as only occurring in New Zealand, was found for the first time in South Australia. The morphological identification of collected specimens was confirmed using an internal transcribed spacer barcoding approach. In this study, the biogeography of R. pseudoroseolus is also presented, based on sporocarp and ectomycorrhiza records. Species distribution modeling implemented in MaxEnt was used to estimate the distribution of the potential range of R. pseudoroseolus in Australia and New Zealand. The obtained model illustrates, in the background of climatic variables and distribution of a symbiotic partner, its wide range of suitable habitats in New Zealand, South-East Australia, and Tasmania. Precipitation of the coldest quarters and annual mean temperature are important factors influencing the potential distribution of the fungus. The occurrence of Pinus radiata, the ectomycorrhizal partner of R. pseudoroseolus, is also an important factor limiting expansion of the fungus' invasion range.

Quo vadis? Historical distribution and impact of climate change on the worldwide distribution of the Australasian fungus Clathrus archeri (Phallales, Basidiomycota)

“…2100-8200 (vs 2800-5800), and precipitation seasonality (bio15) values up to 80 mm (vs up to 40 mm). The current potential range of C. archeri in Europe is much broader than its actual occurrence as revealed by the occurrence data (Table 5), further confirming our previous studies showing that the realized niches of nonnative fungi are smaller than the predicted niches (Pietras et al 2018;Banasiak et al 2019;Pietras 2019;Pietras and Kolanowska 2019). Our model indicated that numerous suitable habitats are located in Europe, e.g., in the British Isles, Apennine Peninsula, Carpathians, Balkans, and Eastern Europe, where no GBIF records of the fungus are currently available (GBIF.org, 26 October 2018b).…”

“…Species distribution models are rather infrequently used in research on nonpathogenic fungi. Thus far, analyses of the future distributions of these organisms have been implemented in biogeographical studies on Boletales in North America (Pietras et al 2018;Banasiak et al 2019;Pietras 2019;Pietras and Kolanowska 2019) and on rare wood-inhabiting saprotrophs restricted to European boreal forests (Kujawska et al 2021). Therefore, studies of C. archeri and its introduction outside of its native range contribute to the discussion on the occurrence of nonpathogenic fungi outside their natural habitats.…”

“…In contrast to regional scales, where soil conditions become more important, the climate can be considered the most important factor influencing the species distribution at the continental scale (Pearson and Dawson 2003). Precipitation values during the driest or coldest quarters were the most decisive factors influencing the occurrence of suilloid fungi outside their native ranges (Pietras et al 2018;Pietras 2019;Pietras and Kolanowska 2019). Changes in precipitation during the vegetation season are regarded as crucial drivers affecting the sporocarp production of edible fungi (Taye et al 2016;Salerni et al 2014).…”

“…The few existing biogeographic studies of non-pathogenic fungi have focused mainly on mycorrhizal fungi (Hao et al 2020). Suilloid fungi, which were cointroduced with their pine tree mycorrhizal partners, are among the well-described examples showing the biogeography and probable pathways of introduction (Vellinga et al 2009;Pietras et al 2018;Pietras 2019;Pietras and Kolanowska 2019;Policelli et al 2019). Descriptions of the introduction of wood-inhabiting Favolaschia calocera to Italy (Vizzini et al 2009), saprobic Amanita inopinata (Fraiture and di Giangregorio 2013) to Belgium, and ectomycorrhizal Amanita phalloides (Pringle and Vellinga 2006;Pringle et al 2009) to the USA are among the few examples of the well-described introduction pathways of fungi.…”

Cytotoxic and Apoptotic Activities of Rhizopogon roseolus (Corda) Th.Fr. Extracts

“…The most important ectomycorizal fungi are sulloid fungi.The truffle-like Suillus and Rhizopogon genera are the largest ectomicorizal groups [23]. R. roseolus is a fungi species that establishes an ectomycorizal relationship with the Pinaceae family [24].…”