干旱区生态环境知识资源中心(Arid): Biological soil crust and vascular plant interactions in Western Myall (Acacia papyrocarpa) open woodland in South Australia

Arid

DOI	10.1111/jvs.12764
	Biological soil crust and vascular plant interactions in Western Myall (Acacia papyrocarpa) open woodland in South Australia
	Steggles, Emma K.1,2; Facelli, Jose M.1; Ainsley, Phillip J.1,2; Pound, Leanne M.1,2
通讯作者	Steggles, Emma K.
来源期刊	JOURNAL OF VEGETATION SCIENCE
ISSN	1100-9233
EISSN	1654-1103
出版年	2019
卷号	30 期号:4 页码:756-764
英文摘要	Aim Biological soil crust (BSC) is a key component of arid environments and plays a major role in determining ecological structure and function. Our research aim was to examine several mechanisms that contribute to BSC-plant interactions at species and community levels, to increase our understanding of plant community dynamics. Location Yellabinna Regional Reserve, South Australia (30 degrees 50 ' 17.99 '' S, 132 degrees 12 ' 10.37 '' E). Methods We used seed extraction techniques to examine soil seed banks beneath patches with and without BSC, and field and glasshouse experiments to study the effects of crust presence and disturbance on seedling emergence and survival. We also explored the influence of chemical leachates from BSC on seed germination. Results Biological soil crust plays a pivotal role in influencing spatial patterns in soil seed bank composition. Our results showed less propagules accumulate in soils beneath crust when compared with patches without crust, and that propagule size is a contributing factor to determining their distribution between patch types. We found that late-stage BSC physically inhibited seedling emergence, which increased when the BSC was disturbed in field experiments. Low seedling survivorship in both patch types suggests that although BSC may suppress recruitment in favourable years, it is low precipitation levels that have the over-riding impact on recruitment success. Finally, leachates from late-stage BSC were found to inhibit germination in three annual plant species, whilst early-stage BSC accelerated germination in one annual plant. This clearly shows that leachate effects on seed germination vary according to plant species and crust successional stage. Conclusion Overall, we identified several mechanisms through which BSC has complex effects on the annual and short-lived perennial plant guilds of arid lands. These mechanisms contribute to species diversity through the creation of spatial heterogeneity in soil seed bank structure and emergence opportunities.
英文关键词	allelopathy arid ecology biological soil crust chemical leachates chenopod shrubland microphytic crust plant community structure seed germination seedling emergence soil seed banks
类型	Article
语种	英语
国家	Australia
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000474629200016
WOS关键词	SEEDLING EMERGENCE ; ARID LANDS ; GERMINATION ; ESTABLISHMENT ; DESERT ; SURVIVAL ; LICHENS ; GROWTH ; NEGEV
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/2XILL650/217404
作者单位	1.Univ Adelaide, Sch Biol Sci, Adelaide, SA 5005, Australia; 2.Bot Gardens Adelaide, Dept Environm & Energy, Adelaide, SA, Australia
推荐引用方式 GB/T 7714	Steggles, Emma K.,Facelli, Jose M.,Ainsley, Phillip J.,et al. Biological soil crust and vascular plant interactions in Western Myall (Acacia papyrocarpa) open woodland in South Australia[J],2019,30(4):756-764.
APA	Steggles, Emma K.,Facelli, Jose M.,Ainsley, Phillip J.,&Pound, Leanne M..(2019).Biological soil crust and vascular plant interactions in Western Myall (Acacia papyrocarpa) open woodland in South Australia.JOURNAL OF VEGETATION SCIENCE,30(4),756-764.
MLA	Steggles, Emma K.,et al."Biological soil crust and vascular plant interactions in Western Myall (Acacia papyrocarpa) open woodland in South Australia".JOURNAL OF VEGETATION SCIENCE 30.4(2019):756-764.