Justification
Erodium chrysanthum is a range-restricted endemic of South Greece. It is one of the most traded Greek plants, worldwide, despite the fact that it is included in the Bern Convention and was assessed as Vulnerable by the European Council (1983). Its subpopulations face various kinds of threats and research and monitoring of the total population and habitats are urgent. Although the AOO and EOO meet the thresholds for Vulnerable and the continuing decline applies for the species' habitat, severe threats exist only in few (less than half) localities. Therefore, the species is classified as Least Concern.
Geographic Range Information
This plant is endemic to Greece. It is found on mountains of Sterea Ellas and Peloponnisos (Dimopoulos et al. 2022, Strid 2022).
Population Information
There is not enough information about the species' population.
Habitat and Ecology Information
The species grows on limestone screes and stony ridges, in high altitudes of the mountains of South Greece (Strid 1986).
Threats Information
The species is threatened mainly by fire and collection for horticultural purposes. It is a very beautiful plant, sold on a lot of websites globally for gardening. It was included in the Bern Convention (Council of Europe 1979), in order to be protected from exploitation. According to Morgan and Leon (1992) and Georghiou and Delipetrou (2000), several of the species' locations were degraded by grazing, tourism and bauxite mining, but with unknown effects to the species' population. Due to the lack of evidence on population size, it was believed at the time that, if the subpopulations consisted of less than 250-1,000 individuals, the species would be characterized as Endangered or Vulnerable. Today, it is known that some subpopulations face threats. On Mount Giona, the subpopulation is threatened by surface bauxite mining (personal observation). On Mountains Kyllini and Pateras wind farms are going to be established (Greek Regulation Authority for Energy 2023), which will probably destroy those subpopulations' habitats, by flattening the summits. On Mountains Parnassos and Chelmos there are ski centres. Also, Erodium chrysanthum is a hemi-cryptophyte growing on high altitudes in the Mediterranean, which is a hot-spot for climate change (Giorgi 2006).The Mediterranean has long stood out in successive generations of global climate models as being particularly sensitive to rising concentrations of green house gases. Models overwhelmingly project, across all scenarios, a large reduction in precipitation, more than in other land regions in relative terms (Giorgi and Lionello 2008, Tuel and Eltahir 2020). A large part of that decline occurs during winter, south of 40oN. According to Rojas et al. (2013), projections (2021–2050) of the winter Mediterranean weather and climate, using the LMDz model and the SRES A1B emission scenario, see a significant warming (between 2 and 4oC) to occur in the region, along with a precipitation decrease by 10–20 % in southern Europe, Mediterranean Sea and North Africa, against a 10% precipitation increase in northern European areas. Also, according to Zittis et al. (2019), the more vulnerable southern Mediterranean regions, with a typically lower adaptive capacity, are projected to experience strong warming, mainly in summer, combined with pronounced drying, mainly during the wet period. Rota et al. (2022) state that most mountain plant species are expected to shift their distributional range upward, causing a change of current vegetation communities and altering the equilibrium of high mountain ecosystems (Pauli et al. 2003, Parolo and Rossi 2008). Species occurring at the highest altitudes may be extensively affected because they cannot shift their distributional range further upward (Dullinger et al. 2012). Even if mountain topography buffered the effects of climate change on plants, the poor ability of endemic plants to disperse, can impede them from tracing the geographical shift in climatically suitable environments. For all the above reasons, it is believed that E. chrysanthum will be affected by climate change in the following years, with loss of mature plants.
Use and Trade Information
In research carried out by Krigas et al. (2014), Erodium chrysanthum was found in 49 trading plant websites and at that time it was traded by 12 nurseries. It was the most traded Greek endemic species, used for horticulture.
Conservation Actions Information
This species is listed under Appendix I of the Convention on the Conservation of European Wildlife and Natural Habitats (Bern Convention). It is also included in the Presidential Decree 67 for the protection of indigenous flora and fauna of Greece (Government Gazette of the Hellenic Republic, 1981). The species grows inside several Natura 2000 sites, however it faces a lot of threats. Therefore, research of its subpopulations and their habitat, as well as monitoring the plants, the habitats and the threats, are absolutely necessary. The species has been propagated ex situ in 49 Botanic Gardens (BCGI 2023) and germplasm is kept in Seed Banks.