浙江庆元百山祖地区表土孢粉的初步研究  

A Preliminary Study on Pollen Distribution in the Surface Soil of the Baishanzu Area in Qingyuan County,Zhejiang Province,China

作　　者：李欣科 张芸[1] 孔昭宸 杜乃秋 吴鸣翔 Li Xinke;Zhang Yun;Kong Zhaochen;Du Naiqiu;Wu Mingxiang(State Key Laboratory of Black Soils Conservation and Utilization,Key Laboratory of Mollisols Agroecology,Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences,Changchun 130102,China;School of Geosciences and Resources,China University of Geosciences(Beijing),Beijing 100083,China;Gansu Coal Geological Exploration Institute,Lanzhou 730030,China;State Key Laboratory of Systematic and Evolutionary Botany,Institute of Botany,Chinese Academy of Sciences,Beijing 100093,China;Zhejiang Qingyuan County Forestry Bureau,Qingyuan 323800,China)

机构地区：[1]中国科学院东北地理与农业生态研究所黑土地保护与利用全国重点实验室,中国科学院黑土区农业生态重点实验室,长春130102 [2]中国地质大学(北京)地球科学与资源学院,北京100083 [3]甘肃煤炭地质勘查院,兰州730030 [4]中国科学院植物研究所系统与进化植物学国家重点实验室,北京100093 [5]浙江省庆元县林业局,浙江庆元323800

出　　处：《热带地理》2023年第11期2241-2248,共8页Tropical Geography

基　　金：国家自然科学基金项目——“浙江钱江源-百山祖国家公园全新世以来亚热带森林植被演变及环境因素分析”(42271161),“新疆帕米尔高原塔什库尔干湿地5000 a BP以来环境演变和古代文明”(41971121);中国科学院战略性先导科技专项(B类)“大尺度区域生物多样性格局与生命策略”(XDB31000000)。

摘　　要：浙江庆元百山祖地区拥有中国最典型的中亚热带常绿阔叶林以及山地生态系统完整的垂直带谱,基于对该区海拔高度300~1700 m所采集的9个表土花粉样品的孢粉组合图式,探讨该区植被与表土花粉之间的关系。结果表明,该区表土花粉谱按照海拔从高至低可划分为3个孢粉组合带,分别对应于常绿落叶阔叶混交林和温性针叶林、常绿阔叶林和暖性针叶林带以及次生针阔混交林林和农田地带(人类活动干扰导致),以松属(Pinus)、栲属(Castanopsis)、栎属(Quercus)等木本植物占优势,以里白属(Hicriopteris)和水龙骨科(Polypodiaceae)为主的蕨类植物也较多。该区冷杉属(Abies)花粉含量和产量都较低,可能与目前百山祖冷杉数量较低及其分布范围相对较窄有一定关系。此外,基于孢粉复合分异度指数的孢粉多样性的分析结果表明,人类干扰因素导致该区较低海拔的表土孢粉不能反映区域的地带性植被。Baishanzu area in Qingyuan,Zhejiang Province,which is famous for the discovery of Abies beshanzuensis,has the most typical mid-subtropical evergreen broad-leaved forest and complete vertical zones of mountain ecosystems in China,and this provides good natural conditions for paleoclimatic reconstruction using surface soil and airborne pollen data.Based on the pollen spectra of nine surface soil pollen samples collected at 300-1,700 m altitude,the relationship between vegetation and surface soil pollen in this area was preliminarily studied.The results show that surface soil pollen in this area can be divided into three assemblage zones from top to bottom according to altitude and ratios of coniferous pollen/broad-leaved pollen and arboreal pollen/non-arboreal pollen,which correspond to the evergreen deciduous broad-leaved mixed forest and temperate coniferous forest,evergreen broad-leaved forest and warm coniferous forest,secondary forest,and farmland(caused by human interference)zones.The surface pollen assemblages were dominated by the evergreen coniferous tree species Pinus,with an average pollen content of 67.5%.The pollen of Castanopsis(6.2%),Quercus(3.4%),Betula(1.4%),and Corylus(1.4%)is common.In contrast,Cyclobalanopsis,Liquidambar,Symplocos,Tsuga,Oleaceae,and Ericaceae had lower contents.Herbaceous plants are dominated by Poaceae(11.2%),including Artemisia,Chenopodiaceae,Apiaceae,Asteraceae,etc.The spore content of fern vegetation was high,mainly Hicriopteris(38.2%)and Polypodiaceae(7.4%).Pinus pollen appeared in all samples,with the highest average content.With increasing altitude,the mean percentage gradually increased from 54.8%to 77.3%,and it is an overly represented pollen with a low sedimentation rate that is easily preserved and transported to the area.Abies pollen is only observed in the samples under the A.beshanzuensis tree at an altitude of 1,700 m.Its percentage is lower than 1%,which may be related to low pollen yield and the relatively narrow distribution range of A.beshanzuensis in this are

关 键 词：表土花粉 冷杉属 松属 人类活动 百山祖 

分 类 号：Q913.84[天文地球—古生物学与地层学]