Soil seed bank traits in an area invaded by Eupatorium adenophorum

doi:10.3724/SP.J.1003.2008.06232

Abstract

Abstract:

Soil seed banks are potential plant populations; therefore, their temporal and spatial patterns affect future plant community dynamics and stability. In the regions invaded by Eupatorium adenophorum, soil seed bank traits can play a key role in construction and function of future ecosystems. We studied the vegetation and soil seed banks in an area invaded by E. adenophorum in Panzhihua, Sichuan Province using a combination of field work and germination trails. We explored seed density and species composition in soil seed banks before and after a seed rain of E. adenophorum. The results showed that: (1) The experimental sites were so heavily damaged byE. adenophorum that the vegetation was simple; in shrub layers, mean coverage and frequency of Coriaria nepalensis, Ficus tikoua, Desmodiunm elegans, Abelia parvifolia and Pistacia weinmannifolia were higher than other shrubs. In herb layer, E. adenophorum, ranging in age between 0 and 4 years, was the most abundant as its Drude abundance was Soc and the frequency was 100%. (2) Seeds of 13 species were found in soil seed banks. The similarity index for species in the vegetation and in the soil seed bank was 0.31. The density ofE. adenophorum seeds was 1,950/m², accounting for 61.3% of total storage in the soil seed bank (3,180/m²), and there were not significantly (P>0.05) fewer seeds in upper layer than other layers. (3) Total seed storage before the seed rain ofE. adenophorum (1,950 seeds/m²) accounted for 41.2% of the storage after the seed rain (4,733 seeds/m²). After the seed rain, germination of E. adenophorum seeds from the soil showed two peaks at the 9th and 17th day, implying that seeds could periodically break dormancy. Our results indicated that E. adenophorum played a priority role in the soil seeds. The scarcity of other species in the seed banks was the main reason that E. adenophorum population regenerated and flourished continuously, and the invasion of E. adenophorum was hard to control.

Key words: Eupatorium adenophorum, soil seed banks, seed rain, local plant species

Weiguang Dang, Xianming Gao, Jinfang Wang, Aifang Li. Soil seed bank traits in an area invaded by Eupatorium adenophorum[J]. Biodiv Sci, 2008, 16(2): 126-132.

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URL: https://www.biodiversity-science.net/EN/10.3724/SP.J.1003.2008.06232

https://www.biodiversity-science.net/EN/Y2008/V16/I2/126

Figures/Tables 4

References 31

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物种 Species	平均盖度 Coverage (%)	频度 Frequency (%)	物种 Species	Drude多度 Drude abundance	频度 Frequency (%)
灌木 Shrub			草本 Herbaceous
地瓜 Ficus tikoua	18.51	84.6	紫茎泽兰 Eupatorium adenophorum	Soc	100.0
马桑 Coriaria nepalensis	16.44	100.0	荩草 Arthraxon hispidus	Cop3	96.2
雅致山蚂蝗 Desmodiunm elegans	6.92	88.5	蒿 Artemisiaspp.	Cop2	100.0
小叶六道木 Abelia parvifolia	4.24	53.8	异叶茴芹Pimpinella diversifolia	Cop2	92.3
清香木 Pistacia weinmannifolia	2.15	69.2	三籽两型豆 Amphicarpaea edgeworthii	Cop2	61.5
车桑子 Dodonaea viscosa	1.86	65.4	牛膝菊 Galinsogo parviflora	Cop2	57.7
华西小石积 Osteomeles schwerinae	1.68	84.6	截叶铁扫帚 Lespedeza cuneata	Cop1	76.9
铁仔 Myrsine africana	1.46	57.7	苜蓿 Medicagosp.	Cop1	50.0
其他 Others	<1	<50	车前 Plantago depressa	Cop1	65.4
			苣荬菜 Sonchus arvensis	Cop1	65.4
			双蝴蝶 Tripterospermum affine	Cop1	61.5
			酢浆草 Oxalis corniculata	Sp	57.7
			鬼针草 Bidens bipinnata	Sp	61.5
			其他 Others	<Sp	<50

物种 Species	平均盖度 Coverage (%)	频度 Frequency (%)	物种 Species	Drude多度 Drude abundance	频度 Frequency (%)
灌木 Shrub			草本 Herbaceous
地瓜 Ficus tikoua	18.51	84.6	紫茎泽兰 Eupatorium adenophorum	Soc	100.0
马桑 Coriaria nepalensis	16.44	100.0	荩草 Arthraxon hispidus	Cop3	96.2
雅致山蚂蝗 Desmodiunm elegans	6.92	88.5	蒿 Artemisiaspp.	Cop2	100.0
小叶六道木 Abelia parvifolia	4.24	53.8	异叶茴芹Pimpinella diversifolia	Cop2	92.3
清香木 Pistacia weinmannifolia	2.15	69.2	三籽两型豆 Amphicarpaea edgeworthii	Cop2	61.5
车桑子 Dodonaea viscosa	1.86	65.4	牛膝菊 Galinsogo parviflora	Cop2	57.7
华西小石积 Osteomeles schwerinae	1.68	84.6	截叶铁扫帚 Lespedeza cuneata	Cop1	76.9
铁仔 Myrsine africana	1.46	57.7	苜蓿 Medicagosp.	Cop1	50.0
其他 Others	<1	<50	车前 Plantago depressa	Cop1	65.4
			苣荬菜 Sonchus arvensis	Cop1	65.4
			双蝴蝶 Tripterospermum affine	Cop1	61.5
			酢浆草 Oxalis corniculata	Sp	57.7
			鬼针草 Bidens bipinnata	Sp	61.5
			其他 Others	<Sp	<50

土层 Soil layers	种子储量 Seed storage (Seeds/m²)
土层 Soil layers	总储量 Total storage	紫茎泽兰 E. adenophorum	紫茎泽兰与其他物种比例 E. adenophorum/other species
0-2 cm	780 ± 274	350 ± 182	35/43
2-5 cm	1,100 ± 383	770 ± 271	77/33
5-10 cm	1,300 ± 502	830 ± 307	83/47
合计 Total	3,180 ± 1,038	1,950 ± 760	195/123

土层 Soil layers	种子储量 Seed storage (Seeds/m²)
土层 Soil layers	总储量 Total storage	紫茎泽兰 E. adenophorum	紫茎泽兰与其他物种比例 E. adenophorum/other species
0-2 cm	780 ± 274	350 ± 182	35/43
2-5 cm	1,100 ± 383	770 ± 271	77/33
5-10 cm	1,300 ± 502	830 ± 307	83/47
合计 Total	3,180 ± 1,038	1,950 ± 760	195/123

物种 Species	储量 Storage (Seeds/m²)	比例 %
灌木 Shrub
车桑子 Dodoneae riscosa	30	0.94
戟叶酸模 Rumex haxtatus	240	7.54
马桑 Coriaria nepalensis	60	1.89
草本 Herbaceous
紫茎泽兰 Eupatorium adenophorum	1,950	61.30
孔雀草 Tagetes patula	390	12.30
黄花稔属一种 Sida sp.	50	1.26
酢浆草 Oxalis corniculata	110	3.46
菝葜属一种 Smilaxsp.	10	0.31
含羞草决明 Cassia mimosoides	90	2.83
荩草 Arthraxon hispidus	120	3.77
牛膝菊 Galinsogo parviflora	100	3.14
其他2种 Others	30	0.63