Spatial distributions and species diversity of two types of Larix principis-rupprechtii

doi:10.3969/j.issn.1000-2006.201609022

LIU Xianzhao, LI Weizhen, WANG Jinlong, LU Yuanchang, XIE Yangsheng

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2017, Vol. 41 ›› Issue (06) : 102-108.

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JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2017, Vol. 41 ›› Issue (06) : 102-108. DOI: 10.3969/j.issn.1000-2006.201609022

Spatial distributions and species diversity of two types of Larix principis-rupprechtii

LIU Xianzhao¹, LI Weizhen², WANG Jinlong², LU Yuanchang¹, XIE Yangsheng¹

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Abstract

【Objective】Based on investigation data on two types of Larix principis-rupprechtii native to the Heicha Mountain, Shanxi Province, China,diameter and canopy structure of forests with the two types,spatial distribution of L. principis-rupprechtii,and the effects of individual species on surrounding biodiversity were analyzed. 【Method】Spatial point patterns were analyzed based on the g(r) function. The individual species-area relationship(mISAR)was used to evaluate the effects of individual species on surrounding biodiversity at different spatial scales.【Result】The diameter structure of plantation and natural L.rupprechtii exhibited a unimodal distribution, the number ratios of the plants in small(5 cm≤DBH<10 cm), middle(10 cm≤DBH<30 cm),and big(DBH≥30 cm)stages were 10:3:4 and 10:3:6 respectively, and the values of species diversity were 0.96, 0.54 and 0.52, and 1.27, 0.94 and 0.63. All trees exhibited clustered distribution across a small range and random distribution with increase in spatial scale. Moreover, all tree species acted as diversity accumulators at all studied spatial scales in the forests with the two types.【Conclusion】The horizontal and vertical structure of the two types were the same for long-term continuous disturbance. Middle-aged trees were more frequent, while the number of young and old trees was less,indicating that this population could not achieve metagenesis by itself.

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LIU Xianzhao, LI Weizhen, WANG Jinlong, LU Yuanchang, XIE Yangsheng. Spatial distributions and species diversity of two types of Larix principis-rupprechtii[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2017, 41(06): 102-108 https://doi.org/10.3969/j.issn.1000-2006.201609022

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