摘要
滇西北丽江-宁蒗北纬27°的金沙江干热河谷具有大面积的原生性萨王纳植被,是云南最北的连片分布的萨王纳植被类型,被认为是世界萨王纳植被的干热河谷残存者,也是我国一类珍稀濒危的植被。它包含特有单种属菊科乔木栌菊木(Nouelia insignis)群落,在沟箐和局部地段,还存在典型热带季雨林树种白头树(Garuga forrestii)占优势的群落,这些情况非常罕见。该地区植物区系特殊,生物多样性丰富,生态系统完整,在科学研究和自然保护上具有重要价值,符合建立自然保护地的条件,建议设立为保护金沙江干热河谷萨王纳植被的自然保护地(区)。
Aims Native savanna vegetation in large area exists in hot dry valley of Jinshajiang,Yunnan at 27°N.Here a suggestion for establishing nature reserve to protect the savanna vegetation is proposed.Methods The savanna vegetations in hot dry valleys of Yunnan are concisely compared to clarify the scientific and conservational importance of the native savanna vegetation in hot dry valley of Jinshajiang.The principle of nature reserve demarcation proposed by Yunnan Province is contrasted to confirm the consistencies of establishment of the suggested natural protected area.Results It is considered that the native savanna vegetation in the hot dry valley of Jinshajiang is a remnant of savanna vegetations in dry hot river valleys,and is also a kind of rare and endangered vegetation type in China.It includes the unique community dominated by the Compositae tree species Nouelia insignis,which is a mono-typical and endemic genus in the hot dry valley.It also has a tropical monsoon forest dominated by Garuga forrestii locally at some gullies and lower slopes in the valley.Geological and climatic histories and floristic composition show that the savanna vegetation in the hot dry valley of Jinshajiang is an ancient,aboriginal and a fewer human-undisturbed vegetation.Conclusions The savanna has a rich biodiversity and unique flora,and forms a complete ecosystem in the hot dry river valley of Jinshajiang,as well as a northern-most distributed savanna in Yunnan.It is of importance in science and nature conservation to establish a natural protected area for the savanna.
作者
朱华
杜凡
Hua Zhu;Fan Du(Center for Integrative Conservation,Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Mengla,Yunnan 666303;College of Forestry,Southwest Forestry University,Kunming 650224)
出处
《生物多样性》
CAS
CSCD
北大核心
2022年第3期183-187,共5页
Biodiversity Science
基金
国家自然科学基金(41471051,31970223)
