摘要
根据第四纪孢粉分析探讨海桑属近几万年来在我国东南部的分布特征，并认为末次盛冰期是导致海桑属从华南大陆灾难性消失的原因。
Sonneratia is a genus of mangrove living in the tropical coasts.Its most concentratedarea is located in the coast line of South Asia,There are 4 species(S。 alba ,S,caseolaris,S. ovataand S。 hainanensis)occurring in extreme south of China,where their distribution is limited in theHainan island,about 19 degrees north latitude. Palynological studies undertaking along the coastsof south一east China,where the present mongrove is abeent of Sonneratia, revealed that Some ofpollen types belonging to this genus( especially S, alba and S, caseolaris)occurred in the sedi-ments of Late Pleistocene,particularly in the period between 40000 and 25000 a BP,Pollen as-semblages of this age contain a number of taxa, having affinities with modern tropical species andgroups.A sharp decrease and lately disappearance of this genus from Guangdong coast line tookplace at about 20000 a BP, which reflects the influence of environmental change during the latestglaciation episode, New mangrove associations restored during the Holocene is similar to that oftoday(absence of Sonneratia) ,which is living under the climate of pronounced mnscon patern。
出处
《中山大学学报（自然科学版）》
CAS
CSCD
1995年第4期88-92,共5页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
中山大学青年科学基金资助项目
关键词
海桑属
孢粉分析
晚更新世
花粉
广东
Sonneratia,Guangdong coasts, Late Quaternary, palynology,paleoenvironment
