Response Of Potential Geographical Distribution Of Eight China's First-class Rare And Endangered Plants To Climate Change And Analysis Of GAP

Rare and endangered plants are an important foundation for natural vegetation communities and species survival in a region,and are an important part of biodiversity.They have an important impact on the integrity of biodiversity.China has abundant resources of rare and endangered plants.The protection of rare and endangered plants and biodiversity in my country is facing severe tests under climate change.Exploring the geographical distribution pattern characteristics of rare and endangered plants under the background of climate change can provide scientific theoretical guidance for protecting the integrity of biodiversity in my country.In this paper,the MaxEnt model is used to simulate the potential geographic distribution areas of eight first-class rare and endangered plants in China(Metasequoia glyptostroboides ?Taiwania cryptomerioides?Panax ginseng?Alsophila spinulosa?Davidia involucrata?Cathaya argyrophylla ? Parashorea chinensis ? Camellia petelotii)under modern climatic conditions,and study them.The relationship with climate,predict the change trend of potential geographical distribution areas under future climate change scenarios,and ascertain their ecological needs,and use this as a basis for systematic protection planning research.It is not only helpful to understand the environmental factors that affect its growth and its response to climate change,but also provides theoretical guidance for the protection of more rare and endangered plants in my country,and further provides reference for my country's biodiversity conservation and vegetation restoration.(1)Among the leading environmental factors affecting the eight species of rare and endangered plants in China,precipitation is the main environmental factor affecting rare and endangered plants.The impact of temperature is relatively small,but it cannot be ignored.(2)In addition to Panax ginseng,the potential geographic distribution areas of the seven rare and endangered Chinese plants are mainly distributed in the central and southeastern regions of China,and the potential geographical distribution areas of Panax ginseng are mainly distributed in the northeastern region of China.(3)Under future climate change scenarios,the potential suitable habitats for Cathaya argyrophylla and Taiwania cryptomerioides are generally decreasing,indicating that climate warming will threaten the habitats of these species in the future;The potential suitable habitats of Metasequoia glyptostroboides?Panax ginseng?Alsophila spinulosa ? Davidia involucrata and Camellia petelotii are increasing,indicating that the habitats of these species may benefit from climate warming,and Parashorea chinensis is less affected by climate warming.(4)The richness pattern of eight species of rare and endangered plants in China shows that the areas with higher species richness are mainly Guangxi,Yunnan and Sichuan,and these areas have more rare and endangered plant resources.(5)The planned areas for systematic protection of eight species of rare and endangered plants in China are mainly located in the central and southern regions of Jilin,the eastern region of Liaoning,Shandong,Sichuan,Chongqing,Guizhou,Yunnan,Guangxi,Guangdong and other regions.(6)The area of eight species of rare and endangered Chinese first-class rare and endangered plant protection vacancies is quite different compared with their protected areas.