Study on the natural population distribution of Emmenopterys henryi in Hubei
Author(s): FAN Yuanyuan, XIANG Jun, LIU Liang, FANG Yuanping, Hubei Key Laboratory of Economic Forest Germplasm Improvement and Resources Comprehensive Utilization, College of Life Sciences, Huanggang Normal University
Pages: 52-56
Year: 2015 Issue: 4
Journal: Ecological Science
Keyword: Emmenopterys henryi; population; species conservation; geographical distribution pattern;
Abstract: Natural population distribution status, population characteristics and population distribution pattern of natural Emmenopterys henryi in Hubei Province were investigated in the present study. Results showed that Emmenopterys henryi resources in Hubei province mainly distributed in the altitude condition of 400-1600 m, being divided or being surrounded in the bottom of valley and mountainside, and their geographical distribution showed a shrinking group pattern, with relatively small populations. Variance and mean value method were employed to analyze the geographical distribution pattern of Emmenopterys henryi, and the results indicated that its value was equal to 1.75 and larger than 1, which demonstrated that its geographical distribution appeared to be a grouping distribution. The scattered geographical distribution pattern of Emmenopterys henryi resulted in spatial interval distribution, which was a barrier for the gene crossing, while smaller populations increased the chances for genetic drift, leading to an increase in the heredity instability, and affecting the population viability. All these were the major reasons resulting in the species endangerment. On the one hand, the causes responsible for the distribution status of Emmenopterys henryi in Hubei Province were biological characteristics of species themselves and related specific habitat requirements. On the other hand, over-exploitation of Emmenopterys henryi resources by human beings and the habitat fragmentation resulted from human economic activities. Based on the evidences provided in the present study, the authors suggested that we should improve ecological environment, and enlarge populations so as to promote the gene intercourse among different population and thus to protect the species.
Pages: 52-56
Year: 2015 Issue: 4
Journal: Ecological Science
Keyword: Emmenopterys henryi; population; species conservation; geographical distribution pattern;
Abstract: Natural population distribution status, population characteristics and population distribution pattern of natural Emmenopterys henryi in Hubei Province were investigated in the present study. Results showed that Emmenopterys henryi resources in Hubei province mainly distributed in the altitude condition of 400-1600 m, being divided or being surrounded in the bottom of valley and mountainside, and their geographical distribution showed a shrinking group pattern, with relatively small populations. Variance and mean value method were employed to analyze the geographical distribution pattern of Emmenopterys henryi, and the results indicated that its value was equal to 1.75 and larger than 1, which demonstrated that its geographical distribution appeared to be a grouping distribution. The scattered geographical distribution pattern of Emmenopterys henryi resulted in spatial interval distribution, which was a barrier for the gene crossing, while smaller populations increased the chances for genetic drift, leading to an increase in the heredity instability, and affecting the population viability. All these were the major reasons resulting in the species endangerment. On the one hand, the causes responsible for the distribution status of Emmenopterys henryi in Hubei Province were biological characteristics of species themselves and related specific habitat requirements. On the other hand, over-exploitation of Emmenopterys henryi resources by human beings and the habitat fragmentation resulted from human economic activities. Based on the evidences provided in the present study, the authors suggested that we should improve ecological environment, and enlarge populations so as to promote the gene intercourse among different population and thus to protect the species.
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