Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.jaridenv.2018.03.006 |
Vegetation and seed banks of arid ephemeral gilgai wetlands subject to contrasting grazing regimes | |
Davies, Richard J. -P.1,2; Mackay, Duncan A.1; Whalen, Molly A.1; Smyth, Anita K.2,3 | |
通讯作者 | Davies, Richard J. -P. |
来源期刊 | JOURNAL OF ARID ENVIRONMENTS
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ISSN | 0140-1963 |
EISSN | 1095-922X |
出版年 | 2018 |
卷号 | 154页码:51-60 |
英文摘要 | Ephemeral gilgai wetlands of the stony-plains of arid Australia have a relatively high diversity of native plant species and are extensively utilised for livestock grazing. We sampled the standing vegetation (SV) and germinable soil seed bank (SSB) of 40 gilgais, comparing gilgais near and far from watering points, and continually stocked versus rarely stocked. Despite historically heavy stock grazing, we found no significant differences in native species richness between treatments, indicating the general resilience of gilgai vegetation. One contributing factor is the abundance of Atriplex nummularia ssp. omissa. Cover of this long-lived shrub did not differ significantly between treatments and was positively correlated with "highly palatable" species’ cover, suggesting that it may act as a nurse species. In contrast, two other long-lived species, Atriplex vesicaria and Astrebla pectinate, had significantly reduced cover or were absent near to watering points. These and other long-lived species had a poorly developed SSB and thus limited ability to regenerate from seed if killed by sustained heavy grazing. The absence of fifteen locally rare species (including 12 short-lived species) from water-near gilgais indicates the need for more intensive survey to determine whether the proliferation of watering points poses a threat to such species. |
英文关键词 | Seasonal variation Palatability Rangeland condition Facilitation Drought Grazing impact |
类型 | Article |
语种 | 英语 |
国家 | Australia |
收录类别 | SCI-E |
WOS记录号 | WOS:000432764800007 |
WOS关键词 | SOUTH-AUSTRALIA ; CHENOPOD SHRUBLANDS ; LOCAL EXTINCTION ; RANGELANDS ; SHRUBS ; LANDS ; WATER ; INDICATORS ; MANAGEMENT ; GRASSLAND |
WOS类目 | Ecology ; Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/210558 |
作者单位 | 1.Flinders Univ South Australia, Sch Biol Sci, GPO Box 2100, Adelaide, SA 5001, Australia; 2.CSIRO Sustainable Ecosyst, POB 2111, Alice Springs, NT 8701, Australia; 3.Univ Adelaide, TERN, Adelaide, SA 5005, Australia |
推荐引用方式 GB/T 7714 | Davies, Richard J. -P.,Mackay, Duncan A.,Whalen, Molly A.,et al. Vegetation and seed banks of arid ephemeral gilgai wetlands subject to contrasting grazing regimes[J],2018,154:51-60. |
APA | Davies, Richard J. -P.,Mackay, Duncan A.,Whalen, Molly A.,&Smyth, Anita K..(2018).Vegetation and seed banks of arid ephemeral gilgai wetlands subject to contrasting grazing regimes.JOURNAL OF ARID ENVIRONMENTS,154,51-60. |
MLA | Davies, Richard J. -P.,et al."Vegetation and seed banks of arid ephemeral gilgai wetlands subject to contrasting grazing regimes".JOURNAL OF ARID ENVIRONMENTS 154(2018):51-60. |
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