Arid
DOI10.1007/s10530-016-1303-2
Effects of exotic annual grass litter and local environmental gradients on annual plant community structure
Wainwright, Claire E.1; Dwyer, John M.1,2; Mayfield, Margaret M.1
通讯作者Wainwright, Claire E.
来源期刊BIOLOGICAL INVASIONS
ISSN1387-3547
EISSN1573-1464
出版年2017
卷号19期号:2页码:479-491
英文摘要

Exotic annual grasses have been introduced into many semi-arid ecosystems worldwide, often to the detriment of native plant communities. The accumulation of litter from these grasses (i.e. residual dry biomass) has been demonstrated to negatively impact native plant communities and promote positive feedbacks to exotic grass persistence. More targeted experiments are needed, however, to determine the relative impact of exotic grass litter on plant community structure across local environmental gradients. We experimentally added exotic grass litter to annual forb-dominated open woodland communities positioned along natural canopy cover gradients in southwest Western Australia. These communities are an important component of this region’s plant biodiversity hotspot and are documented to be under threat from exotic annual grasses. After a one-year treatment period, we measured the effects of exotic grass litter, soil properties, and canopy cover on native and exotic species richness and abundance, as well as common species’ biomass and abundances. Plant community structure was more strongly influenced by soil properties and canopy cover than by grass litter. Total plant abundances per plot, however, were significantly lower in litter addition plots than control plots, a trend driven by native species. Exotic grass litter was also associated with lower abundances of one very common native species: Waitzia acuminata. Our results suggest that exotic grass litter limits the establishment of some native species in this system. Over multiple years, these subtle impacts may contribute substantially to the successful advancement of exotic species into this system, particularly in certain microenvironments.


英文关键词Annual plants Community structure Exotic grass Invasion Litter Semi-arid ecosystem
类型Article
语种英语
国家Australia
收录类别SCI-E
WOS记录号WOS:000394152300004
WOS关键词NATIVE PERENNIAL GRASSES ; RESOURCE AVAILABILITY ; WESTERN-AUSTRALIA ; SOIL NUTRIENTS ; WOODLANDS ; ESTABLISHMENT ; RESTORATION ; VEGETATION ; GERMINATION ; INVASION
WOS类目Biodiversity Conservation ; Ecology
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
来源机构Commonwealth Scientific and Industrial Research Organisation
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/197839
作者单位1.Univ Queensland, Ctr Ecol, Sch Biol Sci, Bldg 8, St Lucia, Qld 4072, Australia;
2.CSIRO, Land & Water, EcoSci Precinct, Dutton Pk, Qld 4102, Australia
推荐引用方式
GB/T 7714
Wainwright, Claire E.,Dwyer, John M.,Mayfield, Margaret M.. Effects of exotic annual grass litter and local environmental gradients on annual plant community structure[J]. Commonwealth Scientific and Industrial Research Organisation,2017,19(2):479-491.
APA Wainwright, Claire E.,Dwyer, John M.,&Mayfield, Margaret M..(2017).Effects of exotic annual grass litter and local environmental gradients on annual plant community structure.BIOLOGICAL INVASIONS,19(2),479-491.
MLA Wainwright, Claire E.,et al."Effects of exotic annual grass litter and local environmental gradients on annual plant community structure".BIOLOGICAL INVASIONS 19.2(2017):479-491.
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