Population structure and dynamics of Reevesia pubescens var. xuefengensis in the Gaowangjie National Nature Reserve of Hunan Province

WANG Chunhui, CHEN Xin, WANG Benzhong, XU Zhanhong

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2022, Vol. 46 ›› Issue (3) : 57-64.

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南京林业大学学报（自然科学版）
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JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2022, Vol. 46 ›› Issue (3) : 57-64. DOI: 10.12302/j.issn.1000-2006.202105012

Population structure and dynamics of Reevesia pubescens var. xuefengensis in the Gaowangjie National Nature Reserve of Hunan Province

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Abstract

【Objective】Reevesia pubescens var. xuefengensis is endemic to China. The study of the population structure and dynamic characteristics, and analyses of the relationship between population and environment is examined, to provide a theoretical basis for the protection and use of R. pubescens var. xuefengensis. 【Method】A typical plot survey method was used to investigate the community of R. pubescens var. xuefengensis, and the DBH, the height and the crown width of each individual in the plot were recorded. According to data obtained from the survey, structure level division and quantity dynamic quantization were carried out. The population dynamics of R. pubescens var. xuefengensis were studied, and its static life table, survival curve, mortality and vanish rate, survival function and time series prediction were analyzed.【Result】The younger individuals in the population were dominant and many of them died while growing to middle-aged. The population had a low anti-disturbance ability and poor stability in the environment. There were three peaks of death recorded, with trends conforming to the Deevey-Ⅱ curve. The dynamic survival characteristics decreased in the early stage, became stable in the middle stage, and declined in the late stage. The result of time series analysis indicated that the number of individuals in the population will increase in the future.【Conclusion】The population in this study area is relatively stable. The population structure will change if the survival rate of the young individuals does not improve and the number of middle individuals cannot be well supplemented. Strengthening protection of the population should be combined with the environment, while reducing the human disturbance and promoting the sustainable development.

Key words

Reevesia pubescens var. xuefengensis / population structure / static life table / quantitative dynamics / survival analysis

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WANG Chunhui , CHEN Xin , WANG Benzhong , et al. Population structure and dynamics of Reevesia pubescens var. xuefengensis in the Gaowangjie National Nature Reserve of Hunan Province[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2022, 46(3): 57-64 https://doi.org/10.12302/j.issn.1000-2006.202105012

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