摘要:在破碎化生境中，植物种群的生物学特性直接反映植物对环境的响应特征和适应对策，探讨不同破碎化程度生境中植株的大小、密度、结实率、种子大小、种子质量以及萌发特性等，对深入了解植物在不同生境中的生存和繁殖状况有重要的指导意义。对古尔班通古特沙漠南缘9个斑块化骆驼刺种群的形态特征和繁殖生物学参数进行了连续2年的调查研究，研究结果表明：随着生境破碎化程度的加剧，骆驼刺的株高、冠幅、密度、结实率、种子大小、种子质量以及萌发率等均显著下降（P < 0.05）。生境破碎不仅强烈抑制了骆驼刺植株的营养生长，使其生长矮小，个体分布稀疏，而且严重阻碍了骆驼刺的繁殖成功和种群更新，增加了种群衰退甚至灭绝的风险。



Abstract:In the fragmented habitats, the biological characteristics of plant populations directly reflect the plant's response and adaptation to the environment. Researches on the size, density, seed setting rate, seed size, seed quality, and seed germination characteristics of plants in different fragmented habitats have important guiding significance for in-depth understanding of plants' survival and reproduction strategies. In this study, the morphological characteristics and reproductive parameters of Alhagi sparsifolia populations in nine patches at the southern margin of the Gurbantunggut Desert were investigated in 2018 and 2019. The results showed that with the increase of the degree of habitat fragmentation, the height, crown width, density, seed setting rate, seed size, seed quality, and seed germination rate of A. sparsifolia decreased significantly. The habitat fragmentation not only significantly inhibited the vegetative growth of A. sparsifolia, but also led to the sparsely distribution that seriously hindered its reproduction and population regeneration, increasing the risks of population depression and extinction.





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