干旱区生态环境知识资源中心(Arid): Conspecific leaf litter and root competition inhibits shrub emergence in the Patagonian steppe

Arid

DOI	10.1007/s11258-019-00968-3
	Conspecific leaf litter and root competition inhibits shrub emergence in the Patagonian steppe
	Victoria Campanella, M.1; Bisigato, Alejandro J.1,2
通讯作者	Victoria Campanella, M.
来源期刊	PLANT ECOLOGY
ISSN	1385-0237
EISSN	1573-5052
出版年	2019
卷号	220 期号:10 页码:985-993
英文摘要	A critical stage in the establishment of new individuals is seedling emergence and litter is a main factor affecting this stage. Recent research found that adults of Chuquiraga avellanedae are over-dispersed. Among several mechanisms, this pattern might be due to the negative influences of adults on seedlings through root competition. We performed field and glasshouse experiments to evaluate (i) the effects of C. avellanedae leaf litter and root presence on the emergence of conspecific seedlings, and (ii) the effects of leaf litter type (C. avellanedae litter, inert litter, no litter) and seed burial depth (seed at the surface or buried) on the emergence of C. avellanedae and Nassella tenuis (dominant grass) seedlings. The field experiment demonstrated root competition from adult plants on shrub seedlings, reducing seedling emergence. However, the effect of root competition did not differ between microsites (under-shrubs vs. between-shrubs). We dismiss the effect of allelopathy because inert litter (i.e., plastic leaves) had the same negative effect as C. avellanedae litter, indicating a mechanical effect. The glasshouse experiment revealed a species-specific response of seedling emergence. C. avellanedae litter limits the emergence of conspecific seedlings but was neutral with regard to the emergence of grass seedlings (N. tenuis). No differences in root competition between microsites and reduction of shrub seedlings by litter suggest that the over-dispersed pattern found for C. avellanedae is caused, at least partially, by litter effects on seedling emergence.
英文关键词	Shrub leaf litter Seedling emergence Root competition Grass-shrub steppes Over-dispersed distribution Microsite
类型	Article
语种	英语
国家	Argentina
收录类别	SCI-E
WOS记录号	WOS:000487051800007
WOS关键词	SEEDLING EMERGENCE ; PLANT LITTER ; INTERSPECIFIC COMPETITION ; NORTHEASTERN PATAGONIA ; SEMIARID RANGELANDS ; PATCH DYNAMICS ; DENUDED AREAS ; ARID LANDS ; ESTABLISHMENT ; FACILITATION
WOS类目	Plant Sciences ; Ecology ; Forestry
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218036
作者单位	1.Consejo Nacl Invest Cient & Tecn, IPEEC, Blvd Brown 2915, RA-9120 Puerto Madryn, Chubut, Argentina; 2.Univ Nacl Patagonia San Juan Bosco, Blvd Brown 3700, RA-9120 Puerto Madryn, Chubut, Argentina
推荐引用方式 GB/T 7714	Victoria Campanella, M.,Bisigato, Alejandro J.. Conspecific leaf litter and root competition inhibits shrub emergence in the Patagonian steppe[J],2019,220(10):985-993.
APA	Victoria Campanella, M.,&Bisigato, Alejandro J..(2019).Conspecific leaf litter and root competition inhibits shrub emergence in the Patagonian steppe.PLANT ECOLOGY,220(10),985-993.
MLA	Victoria Campanella, M.,et al."Conspecific leaf litter and root competition inhibits shrub emergence in the Patagonian steppe".PLANT ECOLOGY 220.10(2019):985-993.