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Abstract
Clathrus archeri (Berk.) Dring, an alien saprotrophic fungus originating from Australia and New Zealand has been present in Europe for over 100 years. From its first observation in 1920 in France, it has spread all over Europe, and is among the better surveyed alien saprotrophic fungi with respect to its spread and distribution. Despite this, data about C. archeri in Croatia in the scientific literature are very scarce. To fill the current gap on the presence and distribution of C. archeri in Croatia, we collected reliable available data on its presence, analysed several environmental factors (climate, soil acidity, topography) on those localities, and developed habitat suitability models using Maxent software. We found out that the fungus has been present in Croatia for over 20 years, so we synthesized information on 25 observations, which were all but one placed in the Continental NATURA 2000 biogeographical region of the country. Localities were situated between 104 and 532 m a.s.l., with mean annual temperatures ranging from 8.1 to 10.9 °C, and annual precipitation ranging between 815 and 1620 mm. On all localities acid soil reactions were present with pH values below 6.8. Although the current number of observations is moderate, in terms of its spatial distribution we can consider C. archeri a widespread alien fungus in Croatia. Based on the habitat suitability models developed here, and data about its ecology from the literature, we can expect more and spatially broader observations of C. archeri in the future.
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Copyright (c) 2025 Sven Jelaska, Damjana Levačić
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