Niche of Dominant Plant Populations of Acacia confusa Community in Pingtan Island

doi:10.3969/j.issn.1000-2561.2022.12.024

Abstract

Abstract:

Acacia confusa is the main construction species of Acacia forest, it’s an excellent afforestation broad-leaved tree species in Pingtan Island. Understanding the niche characteristics of the main woody and herbaceous plants population is helpful to understand the coexistence and competition mechanism of species in island community. We investigated A. confusa communities in Pingtan of its inner and subsidiary islands, Levins and Shannon niche breadth and Pianka niche overlap indexes were used to analyze the ecological niche of the main species in the woody layers and herb layers of A. confusa communities in Pingtan Island. A total of 144 species of vascular plants belonging to 123 genera and 63 families were found, mainly Gramineae and Compositae, significantly different from continental vegetation types. 14 species of invasive plants include Praxelis clematidea, Bidens Pilosa and Erigeron bonariensi were found in the community, which occupied a large niche in the community and may cause some ecological disturbance to the symbiotic population. A. confusa and Casuarina equisetifolia in the tree layer, Sageretia thea and A. confusa in the shrub layer, and Miscanthus sinensis and Praxelis clematidea in the herb layer had higher niche breadth than other species. Species with niche breadth less than 0.5 accounted for 96.67% of the total. The niche breadth of species with higher importance values were generally larger, but not entirely consistent. The niche overlap of dominant population was herb layer (0.253) > shrub layer (0.231) > tree layer (0.149), all smaller than 0.3. The niche overlap between the main species in the community was generally lower, niche differentiation weakened interspecific competition. The strong environmental filterability in the Island led to different degrees of habitat differentiation of the population. The population concentrated in local habitats by narrowing niche breadth, thus promoting the coexistence of species in the island community. The A. confusa community on Pingtan Island was the top zonal community with stable interspecific relationship and slow population regeneration.

Key words: Pingtan Island, Acacia confusa, niche breadth, niche overlap

CLC Number:

S794.9

MA Xiaodi, JIANG Degang, LIU Zilin, WANG Fang, WEN Ruilong, DENG Chuanyuan. Niche of Dominant Plant Populations of Acacia confusa Community in Pingtan Island[J]. Chinese Journal of Tropical Crops, 2022, 43(12): 2614-2625.

Figures/Tables 9

References 35

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地点 Location	样方编号 Sample No.	经度 Longitude	纬度 Latitude	海拔 Elevation/m	坡向 Slope aspect		坡度 Slope/°	坡位 Slope position	郁闭度 Crown density/%
大嵩岛	p1	119°47′55.23″E	25°38′54.26″N	24	S	Ws	53	Ms	0.55
	p2	119°47′48.94″E	25°38′54.93″N	35	W	Ws	8	Ms	0.60
	p3	119°47′51.83″E	25°38′56.40″N	36	S	Ls	33	Ms	0.53
北香炉屿	p4	119°41′27.32″E	25°37′2.72″N	32	WS	Ws	9	Us	0.85
	p5	119°41′28.13″E	25°37′1.74″N	30	E	Ls	40	Ds	0.75
	p6	119°50′26.34″E	25°37′0.74″N	30	WS	Ws	48	Ms	0.60
	p7	119°41′23.95″E	25°36′58.01″N	27	W	Ls	46	Ds	0.60
黄门岛	p8	119°40′49.63″E	25°27′36.28″N	38	WS	Ls	28	Ms	0.85
	p9	119°40′47.86″E	25°27′41.80″N	25	WN	Ls	40	Ds	0.40
	p10	119°40′49.04″E	25°27′34.61″N	30	ES	Ls	60	Ds	0.65
瑞岭山	p11	119°45′41.03″E	25°28′25.53″N	35	ES	Ls	8	Ms	0.65
	p12	119°45′38.53″E	25°28′24.79″N	44	S	Ls	8	Ms	0.80
	p13	119°45′42.30″E	25°28′25.42″N	33	ES	Ls	14	Ms	0.75
白犬山	p14	119°51′31.76″E	25°32′27.95″N	99	WS	Ls	10	Ms	0.59
	p15	119°51′34.05″E	25°32′37.91″N	49	N	Ls	47	Ms	0.55
	p16	119°51′38.02″E	25°32′38.11″N	38	N	Ws	43	Ds	0.80
东屿	p17	119°46′04.01″E	25°31′44.60″N	34	N	Ws	30	Us	0.82
	p18	119°45′49.05″E	25°31′40.63″N	45	E	Ls	18	Us	0.60
	p19	119°45′47.21″E	25°31′45.86″N	30	W	Ws	34	Ms	0.65
	p20	119°45′46.26″E	25°31′44.81″N	43	WN	Ws	24	Ms	0.55
	p21	119°45′49.27″E	25°31′46.26″N	45	W	Ws	20	Us	0.50

地点 Location	样方编号 Sample No.	经度 Longitude	纬度 Latitude	海拔 Elevation/m	坡向 Slope aspect		坡度 Slope/°	坡位 Slope position	郁闭度 Crown density/%
大嵩岛	p1	119°47′55.23″E	25°38′54.26″N	24	S	Ws	53	Ms	0.55
	p2	119°47′48.94″E	25°38′54.93″N	35	W	Ws	8	Ms	0.60
	p3	119°47′51.83″E	25°38′56.40″N	36	S	Ls	33	Ms	0.53
北香炉屿	p4	119°41′27.32″E	25°37′2.72″N	32	WS	Ws	9	Us	0.85
	p5	119°41′28.13″E	25°37′1.74″N	30	E	Ls	40	Ds	0.75
	p6	119°50′26.34″E	25°37′0.74″N	30	WS	Ws	48	Ms	0.60
	p7	119°41′23.95″E	25°36′58.01″N	27	W	Ls	46	Ds	0.60
黄门岛	p8	119°40′49.63″E	25°27′36.28″N	38	WS	Ls	28	Ms	0.85
	p9	119°40′47.86″E	25°27′41.80″N	25	WN	Ls	40	Ds	0.40
	p10	119°40′49.04″E	25°27′34.61″N	30	ES	Ls	60	Ds	0.65
瑞岭山	p11	119°45′41.03″E	25°28′25.53″N	35	ES	Ls	8	Ms	0.65
	p12	119°45′38.53″E	25°28′24.79″N	44	S	Ls	8	Ms	0.80
	p13	119°45′42.30″E	25°28′25.42″N	33	ES	Ls	14	Ms	0.75
白犬山	p14	119°51′31.76″E	25°32′27.95″N	99	WS	Ls	10	Ms	0.59
	p15	119°51′34.05″E	25°32′37.91″N	49	N	Ls	47	Ms	0.55
	p16	119°51′38.02″E	25°32′38.11″N	38	N	Ws	43	Ds	0.80
东屿	p17	119°46′04.01″E	25°31′44.60″N	34	N	Ws	30	Us	0.82
	p18	119°45′49.05″E	25°31′40.63″N	45	E	Ls	18	Us	0.60
	p19	119°45′47.21″E	25°31′45.86″N	30	W	Ws	34	Ms	0.65
	p20	119°45′46.26″E	25°31′44.81″N	43	WN	Ws	24	Ms	0.55
	p21	119°45′49.27″E	25°31′46.26″N	45	W	Ws	20	Us	0.50

编号 No.	种名 Species	重要值Importance value/%			生态位宽度Niche breadth
编号 No.	种名 Species	最大值Maximum	最小值Minimum	平均值±标准差Mean±SD	B_i	B_sw
1	台湾相思Acacia confusa	100.00	30.26	74.06±20.68	0.93	3.00
2	木麻黄Casuarina equisetifolia	51.87	0	10.07±13.63	0.30	1.95
3	朴树Celtis sinensis	23.44	0	2.47±4.52	0.13	1.07
4	银合欢Leucaena leucocephala	29.06	0	2.07±7.27	0.09	0.64
5	海桐Pittosporum tobira	18.16	0	1.41±3.40	0.09	0.67
6	楝Melia azedarach	12.46	0	1.06±1.30	0.09	0.69
7	天仙果Ficus erecta var. beecheyana	13.11	0	1.01±2.54	0.09	0.66
8	滨柃Eurya emarginata	10.95	0	0.95±0.94	0.09	0.69

编号 No.	种名 Species	重要值Importance value/%			生态位宽度Niche breadth
编号 No.	种名 Species	最大值Maximum	最小值Minimum	平均值±标准差Mean±SD	B_i	B_sw
1	台湾相思Acacia confusa	100.00	30.26	74.06±20.68	0.93	3.00
2	木麻黄Casuarina equisetifolia	51.87	0	10.07±13.63	0.30	1.95
3	朴树Celtis sinensis	23.44	0	2.47±4.52	0.13	1.07
4	银合欢Leucaena leucocephala	29.06	0	2.07±7.27	0.09	0.64
5	海桐Pittosporum tobira	18.16	0	1.41±3.40	0.09	0.67
6	楝Melia azedarach	12.46	0	1.06±1.30	0.09	0.69
7	天仙果Ficus erecta var. beecheyana	13.11	0	1.01±2.54	0.09	0.66
8	滨柃Eurya emarginata	10.95	0	0.95±0.94	0.09	0.69

编号 No.	种名Species	重要值Importance value/%			生态位宽度Niche breadth
编号 No.	种名Species	最大值Maximum	最小值Minimum	平均值±标准差Mean±SD	B_i	B_sw
1	台湾相思Acacia confusa	85.33	0	27.09±21.79	0.59	2.70
2	雀梅藤Sageretia thea	30.89	0	7.50±7.20	0.49	2.50
3	滨柃Eurya emarginata	41.81	0	6.01±12.60	0.24	1.87
4	车桑子Dodonaea viscosa	37.88	0	5.63±12.64	0.20	1.57
5	木麻黄Casuarina equisetifolia	49.60	0	5.23±16.09	0.16	1.40
6	福建胡颓子Elaeagnus oldhami	15.36	0	4.03±5.44	0.34	2.08
7	茅莓Rubus parvifolius	27.46	0	3.83±6.77	0.28	2.05
8	九里香Murraya exotica	26.50	0	3.55±7.96	0.21	1.66
9	算盘子Glochidion puberum	26.63	0	3.31±6.78	0.24	2.00
10	栀子Gardenia jasminoides	31.98	0	2.98±9.01	0.16	1.63
11	铁包金Berchemia lineata	12.74	0	2.13±3.27	0.30	2.00
12	球花脚骨脆Casearia glomerata	23.19	0	2.13±7.19	0.14	1.35
13	构棘Maclura cochinchinensis	25.44	0	1.96±8.76	0.11	1.15
14	海桐Pittosporum tobira	17.16	0	1.95±4.96	0.20	1.73
15	黑面神Breynia fruticose	7.54	0	1.81±1.72	0.34	2.01