干旱区生态环境知识资源中心(Arid): Inferring trait-based mechanisms and variance consequences of abiotic secondary dispersal from the spatio-temporal distribution of a desert soil seed bank

Arid

DOI	10.1111/jvs.12979
	Inferring trait-based mechanisms and variance consequences of abiotic secondary dispersal from the spatio-temporal distribution of a desert soil seed bank
	Rolhauser, Andres G.; Pucheta, Eduardo
通讯作者	Rolhauser, AG (corresponding author), Univ Nacl San Juan, Fac Ciencias Exactas Fis & Nat, Dept Biol, Av Ignacio Roza Oeste 590,J5402DCS, San Juan, Argentina. ; Rolhauser, AG (corresponding author), Univ N Carolina, Dept Biol, Chapel Hill, NC 27515 USA.
来源期刊	JOURNAL OF VEGETATION SCIENCE
ISSN	1100-9233
EISSN	1654-1103
出版年	2021
卷号	32 期号:1
英文摘要	Questions Quantifying the combined effects of seed traits, microsite types, and abiotic dispersal agents on the mean and variance of seed bank density and composition will help understand vegetation dynamics in deserts. In a site with NE slope and mainly southerly winds, we asked whether large and oblong seeds were more likely to be transported and deposited in water obstructions and underneath the northern part of shrub understories. We also asked whether seed standing crop was less variable in water obstructions than in other microsites less affected by seed deposition. Location A sand field in San Juan province, Argentina. Methods We sampled the soil seed banks of four microsite types: water obstructions where debris/litter accumulates, southern and northern shrub understories, and open spaces among shrubs. Sampling was carried out in 11 plots and replicated at six moments between 2010 and 2012. Results Debris microsites showed the highest levels of seed density, species richness and standing crop; seed density and standing crop were also least variable in these microsites. Debris microsites also contained high seed abundance of stress-intolerant, shrub-dependent species. Seed density, species richness, seed standing crop, and the proportions of both large and oblong seeds were all higher in northern than in southern understories. The relationship between seed mass and the proportion of seeds that were apparently retained (i.e., not washed away and deposited in water obstructions) was more strongly negative in southern than in northern understories. Conclusions Northern and southern understories appeared to act as water run-on (i.e., seed recipients) and run-off zones (i.e., seed donors), respectively. Seed accumulation under the shelter provided by shrubs may promote seed predation in these microsites. Abiotic dispersal would therefore contribute to the maintenance of vegetation patches when seed arrival underneath shrub canopies saturates granivore consumption.
英文关键词	facilitation generalized linear models seed mass seed redistribution seed shape trait– trait interaction variability vegetation patch water dispersal
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000624605000061
WOS关键词	MONTE DESERT ; FUNCTIONAL TRAITS ; PLANT-COMMUNITIES ; SPATIAL-PATTERN ; SHRUB ; FACILITATION ; DYNAMICS ; SIZE ; COMPETITION ; CONSTRAINS
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/2XILL650/351032
作者单位	[Rolhauser, Andres G.; Pucheta, Eduardo] Univ Nacl San Juan, Fac Ciencias Exactas Fis & Nat, Dept Biol, Av Ignacio Roza Oeste 590,J5402DCS, San Juan, Argentina; [Rolhauser, Andres G.] Univ Buenos Aires, Fac Agron, Dept Metodos Cuantitat & Sistemas Informac, Buenos Aires, DF, Argentina; [Rolhauser, Andres G.] Univ Buenos Aires, CONICET, IFEVA, Fac Agron, Buenos Aires, DF, Argentina; [Rolhauser, Andres G.] Univ N Carolina, Dept Biol, Chapel Hill, NC 27515 USA
推荐引用方式 GB/T 7714	Rolhauser, Andres G.,Pucheta, Eduardo. Inferring trait-based mechanisms and variance consequences of abiotic secondary dispersal from the spatio-temporal distribution of a desert soil seed bank[J],2021,32(1).
APA	Rolhauser, Andres G.,&Pucheta, Eduardo.(2021).Inferring trait-based mechanisms and variance consequences of abiotic secondary dispersal from the spatio-temporal distribution of a desert soil seed bank.JOURNAL OF VEGETATION SCIENCE,32(1).
MLA	Rolhauser, Andres G.,et al."Inferring trait-based mechanisms and variance consequences of abiotic secondary dispersal from the spatio-temporal distribution of a desert soil seed bank".JOURNAL OF VEGETATION SCIENCE 32.1(2021).