Study on Pteridophyte Flora in Jingning Jiulong Geopark Zhejiang
In order to fill the gap in research on the diversity of ferns in the Jingning Jiulong Geological Park in Zhejiang Province,further improve our understanding of the diversity of ferns in the area,and strengthen the foundation of protection and management.The author conducted a survey on the ferns in the Jingning Jiulong Geological Park area through the method of investigation.The stud-ies showed that:(1)Jingning Jiulong Geopark hosted a total of 30 families,58 genera,and 120 species.Specifically,the Gorgepark encompassed 91 species within 25 families and 48 genera,whereas the Luxi Gorge area had 85 species distributed among 27 families and 48 genera.(2)The predominant families in Jingning Jiulong Geological Park included Dryopteridaceae,Polypodiaceae,and Athyr-iaceae.Notably,Dryopteridaceae and Polypodiaceae were predominant families in the Jiulong Gorge area,whereas Dryopteridaceae stood out in the Luxi Gorge area.(3)The fern flora composition analysis of Jingning Jiulong Geological Park showed that there were six distribution types at the family level,nine at the genus level,and nine at the species level.In terms of global plant distribution,this geological park was closely connected to the East Asian and the Indo-Malay region.The park had a complex habitat,with a rich vari-ety of fern species,and it conserved many rare plants such as Angiopteris fokiensis and Cibotiu barometz.The origin of the ferns flora was complex.The distribution area of families and genera both exhibited distinct tropical characteristics,while the species-level dis-tribution showed evident temperate features,overall representing a transition from a tropical origin to temperate conditions.At the species level,the two regions were closely connected yet each had its own distinct characteristics.The southern Luxi Gorge area ex-hibited a higher tropical component compared to the Jiulong Gorge area,aligned with geographical location.It was influenced by the combined effects of multiple ecological factors such as temperature,topography,and light.In conclusion,it is recommended to estab-lish small ecological observation stations within the park to analyze the impact of various ecological factors on the distribution of fern species in depth,providing a scientific basis for subsequent management and conservation efforts.
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