An assessment of population structure and regeneration status of Magnolia punduana Hk. f. & Th.(Magnoliaceae) in fragmented forests of northeast India  

作　　者：Viheno Iralu Ngakhainii Trune Pao Krishna Upadhaya 

机构地区：[1]Department of Environmental Studies,School of Human and Environmental Sciences,North-Eastern Hill University,Shillong 793022,India [2]Department of Basic Sciences and Social Sciences,School of Technology,North-Eastern Hill University,Shillong 793022,India

出　　处：《Journal of Forestry Research》2020年第3期937-943,共7页林业研究（英文版）

基　　金：supported by the University Grants Commission(UGC)(Grant no.:F1-17.1/2013-14/RGNF-2013-14-STNAG-43868/(SA-III/website)and(Grant no.F.15-6(Dec.,2011)/2012(NET))。

摘　　要：The population structure and regeneration status of Magnolia punduana Hk. f. & Th., an endemic tree species of northeast India were investigated in fragmented forests in the Jarain Hills and in adjoining areas of Meghalaya state. The population structure was discontinuous in all the fragments with the absence of individuals in higher diameter classes. The number of individuals increased with the size of the fragment patches(p < 0.004). The density of mature trees(≥5 cm dbh) was high(24–30 individuals ha-1) in the largest fragment(>105 ha). The number of seedlings and saplings were also higher in the larger fragments. Human-related disturbances had a negative impact on the species population(p<0.002). Variation in the population density in different forest patches has been attributed to fragment size, site characteristics and ongoing human disturbances. The restricted distribution of the species coupled withexploitation and habitat destruction underlines the need for its conservation.

关 键 词：Conservation DISTURBANCE FRAGMENTATION MAGNOLIA punduana RESTRICTED distribution 

分 类 号：S718.5[农业科学—林学]