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Study On Potential Geographical Distribution Of Endangered Plants And Construction Of Protected Areason On The Qinghai-tibet Plateau

Posted on:2021-03-30Degree:MasterType:Thesis
Country:ChinaCandidate:L ZhangFull Text:PDF
GTID:2370330620475878Subject:Physical geography
Abstract/Summary:PDF Full Text Request
In the context of global climate change,clarifying the impact of climate change on the geographical distribution of endangered plants on the Qinghai-Tibet Plateau is of great significance for the protection of future endangered plants,the formulation of adaptation strategies,and the planning and construction of protected areas.In this study,six high-performance global climate models BCC-CSM4,Had GEM2-ES,IPSL-CM5A-LR,MRI-CGCM3,CCSM4,and MIROC-ESM6,were selected to establish the Max Ent model.The simulation predicts the potential suitable areas of 60 typical endangered plants in the Qinghai-Tibet Plateau under the current and future(2050s,2070s)three climate scenarios(RCP2.6,RCP4.5,RCP8.5).Secondly,the cumulative distribution model of species is used to study the spatial distribution and pattern change of species diversity of endangered plants under different current and future climate scenarios.Finally,endangered plant species diversity priority protected areas were identified.Based on the priority protected areas and the Qinghai-Tibet Plateau Nature Reserve,GAP analysis was used to identify vacancies in species diversity protection,and suggestions for potential national park pilots and nature reserves were proposed.The main conclusions of this article are as follows:(1)Climate change has a greater impact on herbaceous plants,followed by trees,while shrubs and fungi remain relatively stable.The suitability of dwarf shrub in Qinghai-Tibet Plateau in the current climatic base period is good.In the future,most of the endangered plants will increase in the 2050 s and decrease in the 2070 s.By the 2050 s,the area of potential suitable areas for herb and tree species was mainly increased,and the number of species changing in the potential suitable areas for shrubs and fungi was the same.By 2070 s,the area of potential suitable areas for herbaceous plants was mainly reduced,and the number of species increasing and decreasing in the potential suitable areas for endangered plants,such as trees,shrubs and fungi,was equal.(2)Under the present and three different climatic scenarios of future(2050s,2070s),the species diversity of endangered plants on the Qinghai-Tibet Plateau decreases from the southeast to the northwest.In the future 2050s-RCP4.5 and 2070s-RCP8.5 scenarios,species diversity is most severely degraded,concentrated in the southern Qiangtang Plateau,the southern foothills of the middle Himalayas,the eastern Himalayas,the Hengduan Mountains,the eastern Sichuan Plateau,and the surrounding Qaidam Basin area.(3)The Qinghai-Tibet Plateau priority diversity of endangered plant species diversity is concentrated in the Yarlung Zangbo River Basin,the Yarlung Zangbo Grand Canyon,the southern wing of the Eastern Himalayas,the Three Rivers Parallel Zone,the Hengduan Mountains,the Yalong River Basin,the Western Sichuan Plateau and the Songpan Plateau.(4)Endangered plant species diversity protection vacancy area is mainly distributed in the Qaidam Basin,southeast of Qinghai Lake,north and southeast of Mount Everest Nature Reserve,south of the middle reaches of the Yarlung Zangbo River,southwest of the Yarlung Zangbo River Grand Canyon,north of the Three Rivers Parallel Stream Mangkang Yunnan Golden Monkey Nature Reserve,Minjiang River Basin,Dajinchuan River Basin,Gannan Plateau,West Sichuan Plateau,and Songpan Plateau.The protection vacancies account for 66.21% of the priority protection areas and 37.77% of the area of the Qinghai-Tibet Plateau.(5)The Qinghai area has a wide coverage of protected areas,less protected vacancies,and higher protection potential for endangered plant species diversity.The protection effect of endangered plants in Sichuan and Yunnan on the Qinghai-Tibet plateau is relatively low,so the number of protected areas should be reasonably increased and the coverage of protected areas should be integrated and expanded.
Keywords/Search Tags:Climate change, Qinghai-Tibet Plateau, Endangered plants, MaxEnt model, Species diversity, Nature reserves
PDF Full Text Request
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