岩溶石漠化区不同植被类型表土孢粉组合特征——以重庆市南川区南平镇石漠化区为例

郝秀东; 谢世友; 欧阳绪红; 罗伦德; 石胜强; 李林立; 孙爱芝; 赵增友

doi:10.3969/j.issn.1001-4810.2010.03.013

岩溶石漠化区不同植被类型表土孢粉组合特征——以重庆市南川区南平镇石漠化区为例

doi: 10.3969/j.issn.1001-4810.2010.03.013

1.
西南大学地理科学学院
2.
西南大学地理科学学院；西南大学三峡库区生态环境教育部重点实验室

基金项目: 国家“十一五”科技支撑计划项目（2006BAC01A16）、国家林业局948项目（2009-4-20）、重庆市自然科学基金重点项目（CSTC2009BA0002）、国土资源部、广西壮族自治区岩溶动力学重点实验室开放课题基金项目（KDL2008-15）、现代古生物学和地层学国家重点实验室（中国科学院南京地质古生物研究所）开放课题基金项目（071112）

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出版历程
- 收稿日期: 2010-05-11
- 发布日期: 2010-09-25

Features of spore-pollen assemblage in topsoil under different vegetation types in karst desert— A case in Nanping Town, Nanchuan District, Chongqing

1.
School of Geographical Sciences, Southwest University；Key Laboratory of the Three-Gorge Reservoir Region’s Eco-Environment (Ministry of Education), Southwest University
2.
School of Geographical Sciences, Southwest University

摘要

摘要: 通过对南平次生林地、杂草丛、坡耕地不同植被类型表土调查和采样，利用LuoPacias孢粉鉴定系统对所采的表土样品进行分析鉴定，以研究该区表土的孢粉组合特征。结果显示：（1）样品植物孢粉共由123种植物组成，其中以草本和蕨类植物占据优势，其孢粉含量为46.40%～76.47%，平均为65.55%，其次是乔木（主要为马尾松），花粉含量为17.73%～46.84%，平均为26.40%，灌木植物花粉含量最小，为5.79%～12.50%，平均为8.26%，显示该区植被退化严重；（2）不同植被类型的表土孢粉组合差别明显, 次生马尾松林和次生樟树林的孢粉组合特征依次为马尾松—火棘—大楼梯草—里白和樟树—火棘—构棘—泽芹；杂草丛为裂叶荨麻—圆叶藜—车前子—里白；坡耕地为异叶花椒—裂叶荨麻—剑叶凤尾蕨—玉米，与其相应的实际植被情况大致相同,较好地反映出了石漠化地区现代植被的基本状况。
- 表土孢粉组合 /
- 石漠化 /
- 植被 /
- 岩溶 /
- 重庆南平
Abstract: Through survey and sampling to the topsoil under secondary forests, weeds and slope farmlands in Nanping, spore-pollen is identified by means of LuoPacias method to study the features of the spore-pollen assemblage. The result shows that: (1) the spore-pollen is composed of 123 species, among which, herbs and ferns dominate in quantity with the spore-pollen content of 46.40%～76.47% and averaged 65.55%; the arbors (mainly Pinus massoniana Lamb.) takes the 2nd place with the content about 17.73%～46.84% and averaged 26.40%; and the shrub spore-pollen the least, about 5.79%～12.50% in content and averaged 8.26%, that indicating a serious degradation of local vegetation; (2) there is obvious differentiation in different vegetation types. The spore-pollen assemblages of the secondary masson pine forest and the secondary camphor forest are listed as Pinus massoniana Lamb.—Pyracantha fortuneana Li.—Elatostema umbellatum Bl.—Hicriopteris glauca Thunb. and Cinnamomum camphora L.—Pyracantha fortuneana Li.—Cudrania cochinchinensis L.— Sium suave Walt. respectively; the spore-pollen assemblage of weeds is Urtica fissa Pritz.—Chenopodium acuminatum — Plantago asiatica L.—Hicriopteris glauca Thunb.; the pollen assemblage of the slope farmland is Zanthoxylum dimorphoppyllum Hemsl.—Urtica fissa Pritz.—Pteris ensiformis Burm.—Zea mays L., which corresponding to the actual vegetation and reflecting the present conditions of the modern vegetation cover in the karst desert.
- spore-pollen assemblage in topsoil /
- rocky desert /
- vegetation cover /
- karst /
- Nanping in Chongqing

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