Characteristics of Plant Diversity in Chuona River Reserve, Daxing'anling Mountains

doi:10.7525/j.issn.1673-5102.2024.05.010

Abstract

Abstract:

Exploring the coupling relationship among stand structure， site conditions， protection intensity， and plant diversity is helpful to improve the effect of plant diversity protection in protected areas. Based on this， the forest community of the Chuona River National Nature Reserve in Daxing’anling Mts was selected as the research object， the plant diversity and stand structure characteristics of the arbor， shrub， and herb layers were investigated， and the soil samples were collected and the soil physicochemical properties were determined. The frequency distribution， redundancy ranking and variance analysis were used to reveal the characteristics of plant diversity and its coupling relationship with influencing factors. The results showed that：（1）Larix gmelinii was the dominant tree species in the tree layer of Chuona River Reserve， with a relative abundance of 64.35%， followed by Betula platyphylla. The proportion of lingonberry（Vaccinium vitis-idaea） in shrubs was the highest， reaching 72.70%. A total of 77 herbs were recorded， of which Carex callitrichos accounted for the largest proportion（23.72%）. （2）The order of richness index and diversity index was herb layer>arbor layer>shrub layer， and the shrub layer had the highest evenness index. （3）Redundancy analysis and variance decomposition analysis showed that the independent effects of stand structure explained the most changes in plant diversity. Herbaceous coverage， shrub density， tree height and soil bulk density were most closely related to plant diversity changes. Adjusting stand structure would be a simple and reliable way to improve plant diversity， and the above results provided data support for stand management in Daxing’anling Mts.

Key words: species diversity, stand structure, site conditions, redundancy analysis

CLC Number:

Q948.15

Xiting ZHANG, Jianyu ZHANG, Zhaoliang ZHONG, Wenjie WANG. Characteristics of Plant Diversity in Chuona River Reserve, Daxing'anling Mountains[J]. Bulletin of Botanical Research, 2024, 44(5): 730-737.

Figures/Tables 6

Table 1

Fig.1

Table 2

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Table 3

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层次结构 Vertical structure	指标 Index	平均值 Mean	中位数 Median	标准误差 Standard error	分布区间 Distribution interval
乔木层 Arbor layer	乔木树高TH/m	15.29	15.41	0.29	10.78~19.07
	乔木胸径TDBH/cm	15.37	15.29	0.35	11.19~19.84
	乔木枝下高TCBH/m	9.78	9.94	0.38	3.91~14.42
	郁闭度CD	0.68	0.70	0.02	0.40~0.90
	乔木密度TD/（株·m^-2）	0.12	0.12	0.01	0.05~0.21
灌木层 Shrub layer	灌木高度SH/m	0.69	0.70	0.05	0.20~1.30
	灌木地径SGD/cm	1.13	1.11	0.05	0.51~1.77
	灌木冠幅 SCD/m²	0.25	0.22	0.04	0.13~1.14
	灌木盖度SC/%	16.35	15.76	1.44	3.15~40.73
	灌木密度SD/（株·m^-2）	7.01	2.04	2.14	0.25~59.75
草本层 Herb layer	草本高度HH/cm	28.98	27.00	1.35	17.40~49.83
草本层 Herb layer	草本盖度HC/%	14.14	12.02	1.51	3.66~42.32

指标 Index	平均值 Mean	中位数 Median	标准误差 Standard error	25%中位数 25% median	75%中位数 75% median	最小50%区间 Minimum 50% range	最大分布区间 Max interval	分布区间 Distribution interval	类型 Distribution type
乔木丰富度T-R Tree richness	3.97	4.00	0.20	3.00	5.00	3.00~4.00	5.00~65.00	2.00~7.00	多峰 Multimodal
乔木Simpson指数T-D Tree Simpson index	0.42	0.44	0.03	0.34	0.54	0.40~0.57	0.40~0.50	0.08~0.70	单峰 Unimodal
乔木Shannon指数T-H′ Tree Shannon-Wiener index	0.76	0.76	0.04	0.61	0.92	0.63~0.95	0.60~0.80	0.20~1.33	单峰 Unimodal
乔木Pielou指数T-Ea Tree evenness index	0.67	0.69	0.03	0.51	0.82	0.80~0.90	0.50~0.60	0.39~0.94	单峰 Unimodal
灌木丰富度S-R Shrub richness	2.66	3.00	0.19	2.00	3.00	2.00~3.00	3.00~4.00	1.00~5.00	单峰 Unimodal
灌木Simpson指数S-D Shrub Simpson index	0.35	0.46	0.04	0.10	0.53	0.42~0.57	0.40~0.50	0~0.66	多峰 Multimodal
灌木Shannon指数S-H′ Shrub Shannon-Wiener index	0.58	0.67	0.06	0.24	0.89	0.70~1.00	0.50~1.00	0~1.24	单峰 Unimodal
灌木Pielou指数S-Ea Shrub evenness index	0.73	0.78	0.04	0.61	0.91	0.73~1.00	0.90~1.00	0.38~1.00	单峰 Unimodal
草本丰富度H-R Herb richness	10.87	11.00	0.53	8.00	13.00	10.00~13.00	10.00~12.50	4.00~22.00	单峰 Unimodal
草本Simpson指数H-D Herb Simpson index	0.78	0.80	0.02	0.74	0.85	0.78~0.87	0.80~0.90	0.40~0.92	单峰 Unimodal
草本Shannon指数H-H′ Herb Shannon-Wiener index	1.89	1.94	0.06	1.72	2.14	1.75~2.10	1.75~2.00	0.89~2.66	单峰 Unimodal
草本Pielou指数H-Ea Herb evenness index	0.69	0.69	0.02	0.62	0.78	0.67~0.78	0.65~0.75	0.43~0.86	单峰 Unimodal

简单效应 Simple term effects				条件效应 Conditional term effects
项目 Item	解释量 Explains/%	F	P	项目 Item	解释量 Explains/%	F	P
HC	15.4	5.5	0.002	HC	15.4	5.5	0.002
SD	12.4	4.2	0.002	SD	11.7	4.6	0.006
TH	7.8	2.5	0.010	TH	8.1	3.5	0.004
SH	7.2	2.3	0.016	BD	4.6	2.2	0.038
PI	6.8	2.2	0.046	HH	4.8	2.1	0.052
BD	6.7	2.2	0.048	SOC	3.8	1.8	0.088
TCBH	6.0	1.9	0.080	CD	3.1	1.5	0.166
SCD	5.5	1.7	0.112	TD	3.4	1.7	0.122
HH	4.4	1.4	0.254	SGD	2.5	1.3	0.290
TP	4.3	1.3	0.278	SH	3.9	2.1	0.054
SC	4.0	1.3	0.254	MC	3.3	1.9	0.094
ASP	4.0	1.2	0.262	SCD	2.0	1.2	0.362
SOC	3.8	1.2	0.326	ASP	3.1	1.8	0.110
CD	3.5	1.1	0.364	SLP	2.5	1.5	0.204
SGD	3.0	0.9	0.440	TP	2.0	1.2	0.300
MC	2.6	0.8	0.580	TDBH	1.6	1.0	0.450
TDBH	2.1	0.6	0.706	PI	1.4	0.9	0.514
TD	2.1	0.6	0.722	TN	1.3	0.8	0.566
TN	2.0	0.6	0.706	TCBH	1.3	0.8	0.620
SLP	1.3	0.4	0.892	SC	0.1	<0.1	1.000

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