Evaluation and Optimization of Regional River System Forest Landscape Pattern in Forest Urban Agglomeration of Pearl River Delta

doi:10.13466/j.cnki.lyzygl.2023.02.016

Abstract

Abstract:

To carry out forest landscape evaluation and optimization of regional river system in the Pearl River Delta forest urban agglomeration is to provide the oretical basis for forest quality improvement and high-quality development of the Pearl River Delta forest urban agglomeration.Based on the data of "one map" of forest resources management in Guangdong Province in 2021,the landscape classification and landscape pattern analysis were researched in accordance with the land type,dominant tree species,age and density.Among them,the dominant species were divided into 6 categories:eucalyptus,broad-leaved mixed forest,other broad-leaved forest,Chinese fir,coniferous and broad-leaved mixed forest,and coniferous mixed forest.The results showed that the regional river system forest landscape in the Pearl River Delta forest urban agglomerations was rich in diversity,medium in evenness and connectivity,and the forest landscape patches were simple in shape,mainly small patches,and the patch fragmentation degree was high.The forest landscape was dominated by other broad-leaved forests,accounting for 40.77%,followed by eucalyptus forest,accounting for 24.61%,and the canopy density was mainly medium forest.The ratio of young forest,medium strong forest and mature forest was 1∶2∶1.Through forest quality improvement projects such as high-quality water conservation forest construction,low-yield and low-efficiency forest transformation,and middle and young forest tending,tree species,age group and density structure were adjusted to further optimize the evenness and connectivity of forest landscape.

Key words: forest landscape, landscape pattern index, regional river system, Pearl River Delta forest urban agglomeration

CLC Number:

S718.5
P901

XIE Zhuohong, LIU Lijie, MO Yanqing, CHEN Chumin, MA Zhenhuan, LIU Ping. Evaluation and Optimization of Regional River System Forest Landscape Pattern in Forest Urban Agglomeration of Pearl River Delta[J]. FOREST RESOURCES WANAGEMENT, 2023, (2): 118-125.

Figures/Tables 5

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Fig.1

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Ⅰ级景观类型	广州	深圳	珠海	佛山	江门	肇庆	惠州	东莞	中山	珠三角区域
非林地景观	242730.33	12763.40	6193.39	21735.38	35222.35	18710.96	104561.40	16681.60	16996.36	475595.17
灌木林景观	3453.31	39.68	3303.53	500.77	5947.17	2444.71	2442.47	14684.73	63.81	32880.17
经济林景观	7738.46	2426.76	924.65	132.70	1610.28	339.37	9016.26	16.13	112.19	22316.81
其他林景观	1713.16	379.36	277.44	915.85	7033.69	1715.06	4620.94	67.71	262.15	16985.36
竹林景观	3640.70	1.40	48.94	916.31	6200.81	14357.25	7595.42	44.53	48.50	32853.87
乔木林景观	47212.19	8443.28	10263.28	20463.80	71953.24	42869.04	112342.06	6700.80	13652.61	333900.29
总计	306488.14	24053.88	21011.24	44664.80	127967.55	80436.39	240578.57	38195.49	31135.61	914531.67

景观类型Ⅰ	优势树种	景观类型Ⅱ
乔木林景观	桉树	密桉树成熟林、密桉树幼林、密桉树中壮林、疏桉树成熟林、疏桉树幼林、疏桉树中壮林、中密度桉树成熟林、中密度桉树幼林、中密度桉树中壮林
乔木林景观	阔叶混交林	密阔叶混交林成熟林、密阔叶混交林幼林、密阔叶混交林中壮林、疏阔叶混交林成熟林、疏阔叶混交林幼林、疏阔叶混交林中壮林、中密度阔叶混交林成熟林、中密度阔叶混交林幼林、中密度阔叶混交林中壮林
	?	?
灌木林景观
竹林景观
经济林景观
其他林景观
非林地景观

景观类型	CA	PLAND	PD	LPI	FRAC	CONTAG
密桉树成熟林	1656.52	0.18	0.03	0.01	1.09	0.56
密桉树幼林	502.54	0.06	0.01	0.01	1.10	0.60
密桉树中壮林	2455.40	0.27	0.03	0.01	1.10	0.38
疏桉树成熟林	123.57	0.01	0.00	0.00	1.08	14.00
疏桉树幼林	1642.12	0.18	0.03	0.01	1.09	0.25
疏桉树中壮林	124.79	0.01	0.01	0.00	1.11	1.31
中密度桉树成熟林	9998.62	1.09	0.15	0.02	1.10	0.12
中密度桉树幼林	18148.01	1.98	0.32	0.03	1.09	0.05
中密度桉树中壮林	49325.85	5.39	0.59	0.09	1.10	0.07
?	?	?	?	?	?	?
中密度针叶混交林中壮林	29268.77	3.20	0.34	0.04	1.10	0.07

区域	SHDI	SHEI	CONTAG
广州	1.9957	0.5027	71.85
深圳	1.9031	0.5397	68.62
珠海	1.7979	0.4723	73.44
佛山	1.4603	0.3793	78.43
江门	1.9295	0.4907	71.81
肇庆	2.4111	0.6073	64.90
惠州	2.7173	0.6721	61.93
东莞	1.0456	0.2990	81.74
中山	1.4748	0.4148	76.54
珠三角	2.2286	0.5489	68.81