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- W2327752933 abstract "对不同龄组长白落叶松(Larix olgensis)人工林群落的物种多样性和生物量及二者关系研究分析。结果表明:1)随林龄增大,群落物种组成结构和多样性特征发生了很大变化。物种更迭现象明显,春榆等阔叶树重要值上升,长白落叶松优势地位逐渐下降,植被类型向针阔混交林演替。群落Sorensen相似性指数降低,Shannon-Winner多样性指数呈S型曲线增长,Pielou均匀度指数呈反S型曲线下降,Margalef丰富度指数呈单峰曲线增长趋势;2)随林龄增大,群落生物量S型曲线增长趋势明显,分配序列为:乔木层 >木质物残体层 >灌木层 >草本层,占群落生物量比例分别为82.41%、15.10%、1.69%和0.81%。长白落叶松生物量占据主导地位,但所占比例持续下降,属于衰退型种群,而春榆等阔叶树比例上升。林下植被层中,草本的主导地位逐渐丧失,灌木取而代之,生物量所占比例明显升高。地表木质物残体生物量比例缓慢下降;3)群落中物种多样性测度指标与生物量之间单调线性增长的关系明显,Shannon多样性指数较之Pielou均匀度指数更适合作群落生物量度量指标,生物量与Margalef丰富度指数无明显相关性。" @default.
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- W2327752933 date "2015-01-01" @default.
- W2327752933 modified "2023-09-25" @default.
- W2327752933 title "Biomass of Larix olgensis plantations based on species diversity analyses in Heilongjiang, China" @default.
- W2327752933 doi "https://doi.org/10.5846/stxb201306201752" @default.
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