甘家湖自然保护区梭梭种群结构与动态特征

doi:10.13866/j.azr.2025.05.09

Abstract

Abstract:

To examine the structure and dynamics of the Haloxylon forest in Ganjiahu, 52 plots measuring 20 m×20 m were established in the nature reserve. Through sample plot analysis and data statistics, the static life table of the Haloxylon population was compiled, a survival curve was drawn, and the quantitative dynamic change of the population was determined. The results indicated that: (1) The population structure of Haloxylon was growing, and the number of young individuals (Ⅰ-Ⅳ age classes, basal diameter 0-12 cm) accounted for 81.05% of the total number of individuals in the population. (2) The death rate in the Ⅴ (12-15 cm), Ⅵ (15-18 cm), and Ⅶ (18-21 cm) age classes of the Haloxylon population was higher, showing a significant fluctuation, and its survival curve was close to Deevey-Ⅱ. (3) The quantitative dynamic index of the Haloxylon population (V_pi and V′_pi) was greater than 0, and the probability of risk assumed (P_max) was 0.09, indicating that the population was of a growth type and could resist interference. (4) Following 2-10 age classes in the future, the number of individuals in the remaining age classes exhibited an increasing trend to varying degrees, except that the number of individuals in the second age class (3-6 cm) decreased after two age classes.

Key words: Haloxylon ammodendron (C. A. Mey.) Bunge, Haloxylon persicum Bunge ex Boiss. et Buhse, age structure, survival analysis, time series

ZHAO Yueyue, LI Zihan, WU Shuang, XING Shaohua. Population structure and dynamic characteristics of Haloxylon in Ganjiahu Nature Reserve[J].Arid Zone Research, 2025, 42(5): 866-874.

Figures/Tables 11

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	龄级
	Ⅰ	Ⅱ	Ⅲ	Ⅳ	Ⅴ	Ⅵ	Ⅶ	Ⅷ	Ⅸ	Ⅹ	XI
基径/cm	0~3	3~6	6~9	9~12	12~15	15~18	18~21	21~24	24~27	27~30	>30

	龄级
	Ⅰ	Ⅱ	Ⅲ	Ⅳ	Ⅴ	Ⅵ	Ⅶ	Ⅷ	Ⅸ	Ⅹ	Ⅺ
存活数a_i₀/株	65	322	309	181	111	45	26	10	8	4	1
匀滑修正后存活数a_i/株	300	249	198	146	95	45	26	10	8	4	1

龄级	a_i/株	l_i/株	d_i/株	q_i	L_i/株	T_i/株	e_i	ln l_i	K_i
Ⅰ	300	1000.00	170.00	0.17	915.00	915.00	0.92	6.91	0.19
Ⅱ	249	830.00	170.00	0.20	745.00	1660.00	2.00	6.72	0.23
Ⅲ	198	660.00	173.33	0.26	573.33	2233.33	3.38	6.49	0.30
Ⅳ	146	486.67	170.00	0.35	401.67	2635.00	5.41	6.19	0.43
Ⅴ	95	316.67	166.67	0.53	233.33	2868.33	9.06	5.76	0.75
Ⅵ	45	150.00	63.33	0.42	118.33	2986.67	19.91	5.01	0.55
Ⅶ	26	86.67	53.33	0.62	60.00	3046.67	35.15	4.46	0.96
Ⅷ	10	33.33	6.67	0.20	30.00	3076.67	92.30	3.51	0.22
Ⅸ	8	26.67	13.33	0.50	20.00	3096.67	116.13	3.28	0.69
Ⅹ	4	13.33	10.00	0.75	8.33	3105.00	232.88	2.59	1.39
Ⅺ	1	3.33	-	-	-	-	-	1.20	-

存活曲线方程	R²	Adjusted R²	F	P	类型
y=8.1509e^-0.036x	0.9848	0.9833	650.0	<0.01	Deevey-Ⅱ
y=9.0320x^-0.2644	0.9474	0.9421	179.9	<0.01	Deevey-Ⅱ

种群动态指数	种群动态指数值	种群动态指数	种群动态指数值
V₁	0.17	V₈	0.20
V₂	0.20	V₉	0.50
V₃	0.26	V₁₀	0.75
V₄	0.35
V₅	0.53	V_pi	3.55
V₆	0.42	V′_pi	0.32
V₇	0.62	P_max	0.09

Population structure and dynamic characteristics of Haloxylon in Ganjiahu Nature Reserve

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龄级	初始个体数/株	M_t /株
龄级	初始个体数/株	M₂	M₄	M₆	M₈	M₁₀
Ⅰ	65
Ⅱ	322	194
Ⅲ	309	316
Ⅳ	181	245	219
Ⅴ	111	146	231
Ⅵ	45	78	162	172
Ⅶ	26	36	91	166
Ⅷ	10	18	48	114	134
Ⅸ	8	9	22	64	127
Ⅹ	4	6	12	34	87	108
Ⅺ	1	3	6	16	48	102
总计	1082	1051	791	566	396	210

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