...群结构 数量动态 衰退演替 瓜州绿洲 [gap=2243]Keywords】: Populus euphratica, population structure, quantitative dynamics, decline succession, Guazhou Oasis ...
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In addition, the quantitative dynamics of population and the densities difference of S. exigua on different host plants in the field were found out.
查明了南宁市郊区甜菜夜蛾周年种群数量动态规律及不同寄主上的虫口密度差异;
Trees replacement patterns could be classified into 4 groups according to quantitative dynamics of seedlings, saplings and trees in different gap stages.
依据树木幼苗、幼树和林冠层数量的差异,可将林隙树种的更新模式分为4种类型。
Species composition, quantitative dynamics and effects of gap age and gap size on species compositions were studied in the tropical montane rain forest of Bawangling Natural Reserve, Hainan Island.
分析了海南岛霸王岭自然保护区热带山地雨林林隙内树种的种类组成、数量动态以及林隙年龄和林隙面积对树种组成及数量的影响。
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