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通过物种的空间分布格局推断潜在的生态学过程或影响机制,是生态学研究的主要内容之一.然而,许多研究发现,即使同一物种,其空间分布格局也可能存在很大差异,其原因除各研究所采用的方法不同外,研究尺度(取样面积)的不同可能也是差异的主要原因.本研究基于长白山25 hm2温带阔叶红松林样地胸径?1 cm木本植物数据,使用相对邻近密度?函数,探讨不同取样面积对样地内木本植物空间分布格局分析结果的影响.结果发现:(1)在取样面积较小时(<1 hm2),大多数物种呈随机分布,随着取样面积的增加,呈聚集分布的物种所占的比例逐渐增加;(2)大部分物种的聚集程度随取样面积的增加而增加,但各物种的聚集程度存在显著差异;(3)在取样面积较大时(?1 hm2),物种的聚集程度随物种多度的增加而降低,但在取样面积较小时(<1 hm2),物种聚集程度与多度的关系则不明显.该研究结果进一步加深了我们对物种空间分布格局的认识,进而有利于更好地理解其潜在生态学过程或影响机理.
However, many studies have found that even the same species may have very different spatial distribution patterns, the reason for which is that in addition to the fact that the same species Differences in the research scale (sampling area) may also be the main reasons for the differences in the methods used by each institute.In this study, based on the data of 1 cm DBH DBH in 25 hm2 temperate Korean coniferous forest in Changbai Mountains, the relative density ? Function to explore the effects of different sampling areas on the results of spatial distribution pattern analysis of woody plants in the sample plots. The results showed that: (1) Most of the species were randomly distributed when the sampling area was small (<1 hm2) (2) The degree of aggregation of most species increased with the increase of sampling area, but there was a significant difference in the aggregation degree of each species; (3) When the sampling area was large (? 1 hm2), the degree of aggregation of the species decreased with the increase of species abundance, but the relationship between species abundance and abundance was insignificant when the sampling area was small (<1 hm2) Further deepen our understanding of the spatial distribution pattern of the species, and thereby helping to better understand the potential ecological impact of the mechanism or process.