海南岛甘什岭青梅种群结构与动态

doi:10.11707/j.1001-7488.20200518

Abstract

Abstract:

Objective: To provide a theoretical basis for the protection,sustainable utilization and the formulation of restoration strategies of Vatica mangachapoi population,the structure and dynamics of V. mangachapoi population in Ganshiling,Hainan Island were studied,in order to elucidate the survival status and quantitative dynamics,and to reveal the patterns of regeneration. Methods: A field survey was carried out on V. mangachapoi population in sample plots in Ganshiling,Hainan Island. According to the characteristics of life history of the species and considering the results from previous researches,diameter,height and crown width were divided into classes and population structure was constructed using the classes. The static life table,survival curve,mortality curve,loss rate curve were produced using space to replace time which meant diameter structure instead of age structure. Four functions (survival,accumulated mortality,mortality density,and hazard rate) of survival analysis were used to analyze population dynamics of V. mangachapoi. Time series analysis method was used to predict the age structure of V. mangachapoi population. Results: The population of V. mangachapoi had complete structures of age,height,and crown width,showing the stable development and good regeneration potential. The static life table showed that there were large differences of number of survival trees among different classes. The rate of mortality and loss were both the highest in age class Ⅳ. The population of V. mangachapoi fitted type B₁ of Deevey-Ⅱ. The changes of mortality and loss rate were in similar trends. Four survival curves showed that the population of V. mangachapoi was decline in every stage,suffering from competitive pressures in the middle period. The prediction by the time series analysis showed that the population of V. mangachapoi had a high ability to regenerate and quickly restore to the stable population structure. Conclusion: A large number of seedlings growing in the population of V. mangachapoi made them survive environmental elimination and competition pressure,enabling some individuals survive and grow into the next age class. However,in the middle and young age class,individuals occupy a certain space and environmental resources in the community,and the environmental stress and competition pressure increased substantially,only a few of individuals may grow into the later stage.

Key words: Vatica mangachapoi, population structure, static life table, survival analysis, prediction by time series analysis

CLC Number:

S718.54

Qi Shu,Xuan Hu,Ruijing Xu,Ze Shang,Lianghua Qi. Population Structure and Dynamics of Vatica mangachapoi in Ganshiling, Hainan Island, China[J]. Scientia Silvae Sinicae, 2020, 56(5): 160-167.

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样地 Plot	经度 Longitude (E)	纬度 Latitude (N)	海拔 Altitude/ m	坡度 Slope/(°)	坡向 Aspect	坡位 Slope position	坡型 Slope type	岩石裸露度 Bareness of rock(%)	郁闭度 Canopy density (%)	凋落物厚度 Litter thickness/ cm
1	109°39′57″	18°22′41″	230	18	东北Northeast	上 Upper	凸 Convex	0	94	2.8
2	109°40′21″	18°23′9″	240	2	东East	中 Middle	凸 Convex	0	95	3.6
3	109°39′30″	18°22′20″	240	41	南 South	下 Lower	平 Flat	15	98	3.8
4	109°39′36″	18°22′6″	250	53	东 East	中 Middle	平 Flat	16	87	4.0
5	109°39′59″	18°21′44″	260	63	东南 Southeast	上 Upper	凸 Convex	7	98	4.7
6	109°39′41″	18°21′45″	290	48	东北 Northeast	下 Lower	凹 Concave	6	94	3.0
7	109°39′2″	18°23′9″	100	43	东 East	上 Upper	凸 Convex	0	86	4.4
8	109°38′45″	18°23′7″	90	29	东 East	中 Middle	凹 Concave	39	68	3.4
9	109°38′60″	18°22′51″	160	40	东北 Northeast	中 Middle	凸 Convex	74	87	3.6
10	109°38′39″	18°23′1″	90	11	南 South	中 Middle	平 Flat	0	91	2.3
11	109°40′4″	18°23′2″	290	29	东南 Southeast	下 Lower	凹 Concave	22	95	4.2

x	a_x	l_x	Ln l_x	d_x	q_x	L_x	T_x	e_x	K_x
Ⅰ	159	1 000	6.91	296	0.30	852	2 346	2.35	0.35
Ⅱ	112	704	6.56	277	0.39	566	1 346	1.91	0.50
Ⅲ	68	428	6.06	245	0.57	305	642	1.50	0.85
Ⅳ	29	182	5.21	157	0.86	104	214	1.17	1.98
Ⅴ	4	25	3.23	19	0.75	16	31	1.25	1.39
Ⅵ	1	6	1.84	—	—	3	6	1.00	—

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Population Structure and Dynamics of Vatica mangachapoi in Ganshiling, Hainan Island, China

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