Spatial associations among major tree species in a cool-temperate forest community under heterogeneous topography and canopy conditions
Spatial associations among major tree species in a cool-temperate forest community under heterogeneous topography and canopy conditions
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DOI：
10.1007/s10144-013-0363-8
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发表时间：
2013-02
影响因子：
1.7
通讯作者：
T. Torimaru;S. Akada;K. Ishida;Shuichi Matsuda;Machiko Narita
中科院分区：
文献类型：
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作者：
T. Torimaru;S. Akada;K. Ishida;Shuichi Matsuda;Machiko Narita
植物的空间格局分析可以提供洞察的过程和机制，促进物种共存和社区组织。采用环面平移检验和点模式分析的异质泊松过程，我们调查了生境协会和内部和种间的空间关系的6个主要树种在冷温带森林群落。在1.4公顷（100 × 140 m）的地块上绘制了所有胸径≥ 5 cm的树干，并对地形条件（凸度和坡度）和冠层状态进行了评估。结果表明，除柳叶木兰外，6种植物均与地形和/或林冠条件有生境关联。日本槭、M. salicifolia和日本金缕梅Hamamelis japonicavar.obtusata.在30 m尺度范围内，群落内种间空间格局主要表现为混合或部分重叠的格局，而种间格局的个体成对分析表明，毛豆与两种槭和M. salicifoliaat a spatial scale of up to 5 m.这些结果强调，规模依赖的生态重要性的过程，如物种特定的栖息地偏好，更新模式，种子传播，促进和生态位互补，可能会同时运作，塑造树的分布格局，虽然他们的存在/不存在，以及相对重要性不同的物种。鉴于物种共存和群落组织化过程和机制的复杂性，在分析森林群落中树种空间格局时应更多地考虑空间尺度的影响。
Analysis of the spatial pattern of plants may provide insight into the processes and mechanisms that promote species coexistence and community organization. Using torus-translation tests and point-pattern analyses for a heterogeneous Poisson process, we investigated habitat association and intra- and inter-specific spatial relationships of six major tree species in a cool-temperate forest community. All stems ≥5 cm in diameter at breast height were mapped on a 1.4-ha (100 × 140 m) plot and the topographic conditions (convexity and slope degree) and canopy state were assessed. Our results showed that all six species exhibited habitat associations with topographic and/or canopy conditions except forMagnolia salicifolia. Intra-specific aggregation was found forAcer japonicum,M. salicifolia, andHamamelis japonicavar.obtusata. Community-wide analysis of the inter-specific spatial patterns showed mainly mixed or partially overlapped patterns at a scale of up to 30 m, whereas individual pairwise analyses of inter-specific patterns revealed thatFagus crenatawas positively associated with twoAcerspecies andM. salicifoliaat a spatial scale of up to 5 m. These results highlight that scale-dependant ecologically important processes, such as species-specific habitat preference, regeneration mode, seed dispersal, facilitation and niche complementarity, may operate simultaneously to shape tree distributional patterns, although their presence/absence as well as relative importance vary among species. Given the complexity of the process and mechanisms promoting species coexistence and community organization, more attention should be given to the effect of spatial scale in analyzing the spatial patterns of tree species in forest communities.