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 with exploitation and habitat destruction underlines the need for its conservation.

玉兰的种群结构和更新状况。F。＆Th。，印度东北部的一种特有树种，在Jarain山和梅加拉亚邦相邻地区的零散森林中进行了调查。在所有片段中，种群结构是不连续的，没有较高直径类别的个体。个体的数量随碎片补丁的大小而增加（p  <0.004）。在最大的碎片（> 105公顷）中，成熟树木的密度（≥5 cm dbh）很高（24–30个个体ha ^-1）。在较大的碎片中，幼苗和幼树的数量也更高。与人类有关的干扰对物种种群有负面影响（p <0.002）。不同森林斑块中种群密度的变化归因于片段大小，站点特征和持续的人为干扰。物种分布受限，加上开发和生境破坏，凸显了对其保护的需求。