Quantitative Dynamics and Spatial Distribution Pattern of Pinus yunnanensis Population in Northwest of Guizhou Province

doi:10.13466/j.cnki.lyzygl.2021.02.020

Abstract

Abstract:

The study of population dynamics and spatial distribution pattern is of great significance to elucidate the population development mechanism,various ecological processes,as well as the stability and succession law of the community.This study aimed to clarify the structure of Pinus yunnanensis population in the northwest part of Guizhou Province.Through data from field survey and the method of “space instead of time”,the population dynamic quantitative characteristics are studied based on the static life table and quantitative analysis methods.The population distribution pattern was analyzed with the diffusion coefficient,aggregation intensity index and clumping index.The results showed that:(1)The population structure of P.yunnanensis was spindle type,and mainly aggregated on age classⅢ—ⅥⅠ(78.93%).(2)The population survival curves tended to be Deevey-Ⅱ type,indicating that the population was on an overall growth trend,but gradually tended to be stable.(3)The population distribution pattern was generally cluster distribution,but there were some differences in the degree of clustering of populations in different plots.With the increase of age class,the spatial distribution pattern of population changed from cluster distribution to uniform distribution.This study can provide theoretical basis for the sustainable management of Pinus yunnanensis forest and further provide reference for the management and protection of forest ecosystem in karst areas.

Key words: Pinus yunnanensis, population structure, static life table, survival curve, spatial distribution pattern

CLC Number:

HE Bin, LI Qing, LI Yangzheng, LI Wangjun. Quantitative Dynamics and Spatial Distribution Pattern of Pinus yunnanensis Population in Northwest of Guizhou Province[J]. FOREST RESOURCES WANAGEMENT, 2021, 0(2): 149-157.

Figures/Tables 7

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Fig.1

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Fig.2

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样地	经度	纬度	海拔/m	坡位	郁闭度/%	建群种
Q₁	104°22'21″E	26°87'9″N	2110	山顶	80	云南松
Q₂	104°20'89″E	26°88'6″N	2090	中上部	75	云南松
Q₃	104°20'35″E	26°87'28″N	2181	中下部	85	云南松、槲栎
Q₄	104°19'35″E	26°84'72″N	2227	中部	90	云南松、槲栎
Q₅	104°19'3″E	26°85'58″N	2190	中部	78	云南松
Q₆	104°18'51″E	26°79'98″N	2237	中下部	83	云南松、华山松
Q₇	104°21'76″E	26°86'63″N	2180	山顶	82	云南松
Q₈	103°58'3″E	26°34'14″N	2098	山顶	85	云南松
Q₉	103°56'0″E	26°32'53″N	2225	中部	85	云南松
Q₁₀	103°58'16″E	26°33'59″N	2133	中下部	87	云南松、黄杉
Q₁₁	104°21'76″E	26°59'51″N	2180	中部	88	云南松、栓皮栎
Q₁₂	104°11'28″E	26°53'55″N	2001	下部	89	云南松

龄级(x)	径级范围/cm			A_x	a_x	l_x	lnl_x	d_x	q_x	L_X	T_X	e_x	K_x
Ⅰ		<	2.5	5	256	1000	6.908	145	0.145	928	3500	3.500	0.156
Ⅱ	2.5	~	5	97	219	855	6.752	145	0.169	783	2572	3.007	0.185
Ⅲ	5	~	9	197	182	711	6.567	145	0.203	639	1789	2.516	0.227
Ⅳ	9	~	13	187	145	566	6.339	145	0.255	494	1150	2.031	0.295
Ⅴ	13	~	17	181	108	422	6.045	145	0.343	350	656	1.556	0.419
Ⅵ	17	~	21	113	71	277	5.625	145	0.521	205	307	1.106	0.736
Ⅶ	21	~	25	51	34	133	4.889	105	0.794	80	102	0.765	1.580
Ⅷ	25	~	29	21	7	27	3.308	20	0.714	18	22	0.805	1.253
Ⅸ		≥	29	7	2	8	2.056	8	--	4	4	0.500	--

样地	C	M^*	PAI	I	I_&	C_a	分布格局
Q₁	8.909	24.409	1.479	7.909	1.365	0.479	C
Q₂	4.877	13.377	1.408	3.877	1.314	0.408	C
Q₃	2.322	15.822	1.091	1.322	1.070	0.091	C
Q₄	1.048	10.548	1.005	0.048	1.003	0.005	C
Q₅	3.136	16.886	1.145	2.136	1.110	0.145	C
Q₆	4.718	16.718	1.286	3.718	1.219	0.286	C
Q₇	2.848	12.848	1.168	1.848	1.129	0.168	C
Q₈	5.101	17.351	1.309	4.101	1.237	0.309	C
Q₉	8.369	26.119	1.393	7.369	1.299	0.393	C
Q₁₀	2.836	15.086	1.139	1.836	1.106	0.139	C
Q₁₁	5.269	19.769	1.275	4.269	1.210	0.275	C
Q₁₂	6.387	27.137	1.248	5.387	1.188	0.248	C

龄级	C	M^*	PAI	I	I_&	C_a	分布格局
Ⅰ	1.072	0.489	1.173	0.072	1.200	0.173	C
Ⅱ	5.592	8.509	2.172	4.592	2.098	1.172	C
Ⅲ	1.582	10.582	1.058	0.582	1.054	0.058	C
Ⅳ	2.000	6.667	1.176	1.000	1.164	0.176	C
Ⅴ	1.318	2.985	1.119	0.318	1.113	0.119	C
Ⅵ	0.749	0.832	0.768	-0.251	0.769	-0.232	U
Ⅶ	0.757	0.507	0.676	-0.243	0.667	-0.324	U
Ⅷ	0.636	0.303	0.454	-0.364	0.429	-0.546	U
Ⅸ	0.910	0.410	0.820	-0.090	0.800	-0.180	U