Spatial arrangements affect suppression of invasive Alternanthera philoxeroides by native Hemarthria compressa

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	Spatial arrangements affect suppression of invasive Alternanthera philoxeroides by native Hemarthria compressa
	Liao, Jianxiong; Tao, Min; Jiang, Mingxi
刊名	ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY
	2014
英文摘要	It has been hypothesized that differences in spatial arrangements change the relative frequency of intra- and interspecific encounters between plant species. Manipulating spatial arrangement may play a role in invasive plant suppression when native species are used as competitors against introduced species. In this study, a replacement series experiment was performed to investigate the effects of intraspecifically random and aggregated spatial arrangements on interactions between the native plant Hemarthria compressa and the invasive plant Alternanthera philoxeroides, to test the possibility and effectiveness of H. compressa in suppressing A. philoxeroides. When both species were planted in intraspecifically random spatial patterns, H. compressa had a competitive advantage over A. philoxeroides at relative densities of 2:2 and 3:1. However, aggregation increased the strength, and therefore the cost, of intraspecific competition in H. compressa, resulting in lower biomass production, which reduced its effectiveness as an interspecific competitor. As the relative density of H. compressa in mixtures decreased, plants allocated more biomass to belowground parts, but fewer interspecific encounters lowered its inhibitory effects on A. philoxeroides. The results not only confirm that the frequency of conspecific and heterospecific encounters can influence competitive outcomes, but also suggest that a reduction in the degree of spatial aggregation in H. compressa and an increase in its relative densities may be essential to increase the suppression of A. philoxeroides. (C) 2014 Elsevier Masson SAS. All rights reserved.
内容类型	期刊论文
源URL	[http://202.127.146.157/handle/2RYDP1HH/403]
专题	中国科学院武汉植物园
推荐引用方式 GB/T 7714	Liao, Jianxiong,Tao, Min,Jiang, Mingxi. Spatial arrangements affect suppression of invasive Alternanthera philoxeroides by native Hemarthria compressa[J]. ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY,2014.
APA	Liao, Jianxiong,Tao, Min,&Jiang, Mingxi.(2014).Spatial arrangements affect suppression of invasive Alternanthera philoxeroides by native Hemarthria compressa.ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY.
MLA	Liao, Jianxiong,et al."Spatial arrangements affect suppression of invasive Alternanthera philoxeroides by native Hemarthria compressa".ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY (2014).