天山中部天山云杉林土壤种子库与地上植被的物种相似性  

Species Similarity between Soil Seed Bank and Aboveground Vegetation in Picea schrenkiana Forests in the Central Part of the Tianshan Mountains,Xinjiang

作　　者：周琳[1,2] 孟晖[3] 潘存德[1,2] 张国林[1,2] 王兵[1,2] 

机构地区：[1]新疆农业大学林学与园艺学院,乌鲁木齐830052 [2]新疆教育厅干旱区林业生态与产业技术重点实验室,乌鲁木齐830052 [3]新疆金风科技股份有限公司,乌鲁木齐830026

出　　处：《新疆农业科学》2013年第7期1235-1245,共11页Xinjiang Agricultural Sciences

基　　金：国家自然科学基金项目(30960313;30360087)

摘　　要：【目的】天山云杉(Picea schrenkiana Fisch.et Mey.)林是天山山地最主要的地带性森林植被,为新疆绿洲生态系统的生命之源,对水源的涵养发挥着不可或缺的重要作用。通过对天山北坡中部头屯河上游海拔1 750～2 750 m高度天山云杉林土壤种子库的采样和地上植被的调查分析,旨在深入了解二者在物种组成上的相似性程度,以期为天山森林生态系统的保育与恢复提供科学依据。【方法】采用土壤种子库采样与地上植被调查一一对应的方法和Jaccard相似性系数。【结果】从天山云杉林土壤种子库中共萌发鉴定出种子植物53种,隶属24科43属,从其地上植被调查中共鉴定出种子植物58种,隶属27科49属,二者共有物种43种。在1 750～2 750 m的10个海拔高度(梯度100 m)上,土壤种子库与地上植被物种组成的Jaccard相似性系数分别为0.35、0.31、0.30、0.29、0.30、0.26、0.23、0.22、0.21、0.18,均值为0.27。【结论】天山云杉林土壤种子库与地上植被的物种组成相似性不高,且随着海拔高度的增加,其相似性呈现减小的趋势。[Objective] Picea schrenkiana forests,the source of life of Xinjiang oasis ecosystems,are the main typical zonality forests in the Tianshan Mountains,which play an important role in water conservation.Through the analysis on the soil seed bank sampling and aboveground vegetation investigation in the upper reaches of Toutun River,P.schrenkiana forests on the central northern slope of Tianshan Mountains at the altitude from 1,750 to 2,750m,the project aimed at deeply understanding the similarity degree of soil seed bank and aboveground vegetation in species composition,with a view to providing a theoretical basis for the conservation and restoration of P.schrenkiana forest ecosystems.[Method] The one-one correspondence was used between the soil seed bank sampling and aboveground vegetation investigation,and Jaccard similarity coefficient was used to calculate the similarity between the soil seed bank and the aboveground vegetation.[Result] A total of 53 plant species were recorded in the germination of P.schrenkiana forest soil seed bank,which belong to 24 families,43 genera,and 58 species were found in the aboveground vegetation,which belong to 27 families,49 genera.Of these species,43 species were found both in the seed bank and the aboveground vegetation.According to Jaccard index,with an average of 0.27,the similarity coefficient between the soil seed bank and the aboveground vegetation at ten altitude from 1,750 m to 2,750 m （gradient of 100m） were 0.35,0.31,0.30,0.29,0.30,0.26,0.23,0.22,0.21 and 0.18.[Conclusion]There was a relatively low correlation between the soil seed bank and the aboveground vegetation,and the similarity index presented a decreasing trend with the attitude rising.

关 键 词：天山云杉林 土壤种子库 地上植被 物种 相似性 海拔 

分 类 号：S791.18[农业科学—林木遗传育种]