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《ACTA BOTANICA SINICA》 1999-01
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Spatial Distribution Pattern of Cathaya argyrophylla Population

XIE Zong-Qiang;CHEN Wei-Lie(Institute of Botany, The Chinese Academy of Sciences, Beijing 100093)LIU Zheng-Yu(Sichuan Institute of Materia Medica, Nanchuan, Sichuan 648408)JIANG Ming-Xi HUANG Han-Dong(Wuhan Institute of Botany, The Chinese Academy of Scie  
Cathaya argyrophylla Chun et Kuang is a Chinese endemic rare species distributed in Sichuan,Guithou, Guangxi and Hunan Provinces. It is considered as an endangered crop and is listed in the China Red Data of Plants due to its very limited resources. The distribution pattern of C. argyrophylla population was related to its biological characteristics such as the age structure and regeneration mode, and the microenvironments. In the old forests, gaps were abundant and occupied by variable-aged individuals of C. argyrophylla,resulting in a contagious distribution pattern. In the young forests random distribution pattern was more often found. Under the same climatic and site condition, the heterogeneity of microenvironments resulting from the different degree of rock cover and soil erosion significantly affected the type and scale of distribution pattern ofC. argyrophylla population. Even in the same gap, the center and foe edge could have different effects on the distribution pattern due to the uneven sunlight illuminance. As one of the codominants, the distribution of C. argyrophylla in communities was affected by other dominants, especially by the evergreen tree species. Light was the major factor determining the distribution pattern of C. argyrophylla in various communities. The pattern scale of contagious distribution of C. argyrophylla population was mostly less than 16 m2, although it differed among communities.
【Fund】: 国家自然科学基金
【CateGory Index】: Q948.1
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