干旱区生态环境知识资源中心(Arid): The effect of plant invasion on soil microbial carbon-use efficiency in semi-arid grasslands of the Rocky Mountain West

Arid

DOI	10.1111/1365-2745.13815
	The effect of plant invasion on soil microbial carbon-use efficiency in semi-arid grasslands of the Rocky Mountain West
	Nasto, Megan K.; McLeod, Morgan Luce; Bullington, Lorinda; Lekberg, Ylva; Stark, John M.
通讯作者	Nasto, MK (corresponding author), Utah State Univ, Dept Biol, Logan, UT 84322 USA. ; Nasto, MK (corresponding author), Utah State Univ, Ecol Ctr, Logan, UT 84322 USA. ; Nasto, MK (corresponding author), Working Lands Conservat, San Francisco, CA 94104 USA.
来源期刊	JOURNAL OF ECOLOGY
ISSN	0022-0477
EISSN	1365-2745
出版年	2021-12
英文摘要	Grassland ecosystems invaded by exotic plant species often exhibit substantially higher above-ground productivity and soil nitrogen (N) than the native communities they replace. These shifts are likely associated with altered microbial carbon (C) and N cycling, but we know surprisingly little about how these processes change with plant invasion. Targeting four invasive plant species common in the Rocky Mountain West, we collected soils from invaded and adjacent uninvaded grassland field plots, as well as from an experimental garden. We used a laboratory incubation of soils with C-13- and N-15-labelled substrates to examine how microbial C respiration, C assimilation and N cycling differed among plant communities. To assess how these rates corresponded with plant productivity and microbial communities, we measured above-ground plant biomass and characterized bacterial and fungal communities using Illumina sequencing. In the paired observational plots, soil microbial communities associated with invaders generally had higher respiration rates and lower growth rates than those associated with the native plant communities, leading to a lower microbial carbon-use efficiency (CUE). Overall, soil substrate with a lower C:N was related to decreased CUE, and lower CUE was related to increased gross and net N mineralization. In turn, faster gross N mineralization was related to greater above-ground biomass. These patterns coincided with significant differences in fungal communities, whereas bacterial communities varied by site. Invasive plants also altered microbial communities in the experimental plots, but this was not associated with shifts in microbial CUE, which was low overall. Synthesis. Our results provide evidence that invasive plants alter bacterial and fungal communities. These shifts were not associated with changes in microbial CUE and, thus, the often-assumed link between compositional and functional shifts was not apparent in this study. However, lower CUE was associated with elevated rates of N cycling and productivity, which, in low-productivity systems, could help explain the increased growth and success of exotic plant invaders.
英文关键词	Bromus tectorum carbon-use efficiency Centaurea stoebe Euphorbia esula nitrogen cycling plant invasion Potentilla recta stable isotopes
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000726782300001
WOS关键词	NITROGEN AVAILABILITY ; COMMUNITIES ; INCREASES ; DECOMPOSITION ; ABUNDANCE ; REGION ; SHIFTS
WOS类目	Plant Sciences ; Ecology
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/374691
作者单位	[Nasto, Megan K.; Stark, John M.] Utah State Univ, Dept Biol, Logan, UT 84322 USA; [Nasto, Megan K.; Stark, John M.] Utah State Univ, Ecol Ctr, Logan, UT 84322 USA; [McLeod, Morgan Luce; Bullington, Lorinda; Lekberg, Ylva] MPG Ranch, Missoula, MT USA; [Bullington, Lorinda; Lekberg, Ylva] Univ Montana, Dept Ecosyst & Conservat Sci, Missoula, MT 59812 USA; [Nasto, Megan K.] Working Lands Conservat, San Francisco, CA 94104 USA
推荐引用方式 GB/T 7714	Nasto, Megan K.,McLeod, Morgan Luce,Bullington, Lorinda,et al. The effect of plant invasion on soil microbial carbon-use efficiency in semi-arid grasslands of the Rocky Mountain West[J],2021.
APA	Nasto, Megan K.,McLeod, Morgan Luce,Bullington, Lorinda,Lekberg, Ylva,&Stark, John M..(2021).The effect of plant invasion on soil microbial carbon-use efficiency in semi-arid grasslands of the Rocky Mountain West.JOURNAL OF ECOLOGY.
MLA	Nasto, Megan K.,et al."The effect of plant invasion on soil microbial carbon-use efficiency in semi-arid grasslands of the Rocky Mountain West".JOURNAL OF ECOLOGY (2021).