Germination characteristics and spatial distribution patterns of woody plants in a deciduous broad-leaved forest in Baiyunshan, Henan Province, China
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摘要: 以河南省白云山自然保护区温带落叶阔叶林5 hm2样地群落为研究对象，分析该样地木本植物的特征，同时利用点分布格局对样地内萌生能力较强的个体进行空间格局分析。结果显示：该样地内共有木本植物91种17 369株；发生萌生现象的有62种2082株，萌生物种占总物种数的68.13%，萌生个体占总个体数的11.99%。样地内所有发生萌生现象的木本植株个体胸径分布符合倒“J”字型，表明萌生现象多发生在植物生长发育的早期。重要值前12位的萌生物种发生萌生现象的植株个体胸径结构大致表现为4种类型，分别为倒“J”字型、双峰型、正态型和波动型，表明不同物种在不同生活史阶段萌生能力不同。点分布格局分析结果表明，样地内重要值前12位的萌生物种发生萌生现象的植株个体整体表现为小尺度聚集分布，大尺度随机分布或均匀分布。萌生更新在温带落叶阔叶林中普遍存在并呈不同的聚集分布格局。Abstract: We studied the woody plant community in a 5 hm2 area of deciduous broad-leaved forest in Baiyunshan Nature Reserve, Henan Province, China, and explored the characteristics and spatial patterns of the sprouting individuals and sprouting species using point distribution. We identified 91 species and 17 369 trees in the study plot, including 62 sprouting species and 2082 sprouting trees. Sprouting species accounted for 68.13% of the total species and sprouting individuals accounted for 11.99% of the total individuals. The diameter at breast height (DBH) distribution of all sprouting woody plants in the plot conformed to an inverted "J" shape, indicating that the sprouting phenomenon mostly occurred in the early stage of woody plant growth and development. The DBH structure of the top 12 sprouting species with importance values showed four types, i.e., inverted "J" type, bimodal type, normal type, and fluctuating type, indicating that different species exhibited different sprouting abilities at different life cycle stages. Point distribution pattern analysis of sprouting individuals in the top 12 sprouting species with importance values showed that the distribution was aggregated at the small scale but was random or uniform at the large scale. Thus, sprouting regeneration appears to be common in temperate deciduous broad-leaved forests and shows different aggregation distribution patterns due to the different adaptation ranges of each species to the environment.
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Keywords:
- Sprouting regeneration /
- Sprouting ability /
- Baiyunshan /
- Spatial distribution
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