Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1111/jvs.12426 |
Vegetation resilience to mega-drought along a typical floodplain gradient of the southern Murray-Darling Basin, Australia | |
Capon, Samantha J.1; Reid, Michael A.2 | |
通讯作者 | Capon, Samantha J. |
来源期刊 | JOURNAL OF VEGETATION SCIENCE
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ISSN | 1100-9233 |
EISSN | 1654-1103 |
出版年 | 2016 |
卷号 | 27期号:5页码:926-937 |
英文摘要 | Questions: How diverse and resilient is vegetation following a decade of extreme drought along a typical floodplain gradient of semi-arid south-eastern Australia? How do mechanisms of resilience (i.e. persistence and soil seed banks) vary between major plant groups and spatially with respect to habitat type and position along a flood frequency gradient? Location: Southern Murray-Darling Basin, Australia. Methods: We surveyed understorey vegetation and conducted germination trials to examine responses to re-wetting from soil seed banks of seven major habitat types along a typical floodplain gradient of the southern Murray-Darling Basin. We assessed abundance, species richness, functional diversity and composition, including exotic species, within and between extant and germinating assemblages. Results: Understorey vegetation was surprisingly diverse, although low in cover, following a decade of extreme drought, with considerable numbers of plant species (61) and functional plant groups represented. Historically drier habitats, towards floodplain margins, had higher species richness and cover overall and for exotic species. Plant assemblages exhibited high heterogeneity between habitats. Soil seed banks were very dissimilar from extant vegetation, comprising mainly amphibious and damp taxa as well as some terrestrial herbs, mostly annuals. Seed banks were most abundant and diverse in intermediate floodplain habitats, and their composition was very distinct between habitat types. Conclusions: Semi floodplain v likely to he highly resilient to prolonged drought. Plants persisting under dry conditions do not appear to rely on local soil seed banks for regeneration and may either tolerate drying in situ or arrive from neighbouring ecosystems. Soil seed banks allow understorey vegetation to respond to re-wetting, especially in intermediate floodplain habitats. Lake bed assemblages and aquatic/amphibious species lacking soil seed banks appear most vulnerable to drought. Vegetation resilience is promoted by landscape heterogeneity. |
英文关键词 | Climate change Flow regime Germination Regeneration Soil seed banks Species richness Vegetation dynamics Wetland Zonation |
类型 | Article |
语种 | 英语 |
国家 | Australia |
收录类别 | SCI-E |
WOS记录号 | WOS:000388439400007 |
WOS关键词 | SOIL SEED BANK ; MURRUMBIDGEE RIVER ; UNDERSTOREY VEGETATION ; RIPARIAN ECOSYSTEMS ; DESERT FLOODPLAIN ; CLIMATE-CHANGE ; NORTH-AMERICA ; WATER ; VARIABILITY ; FREQUENCY |
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/2XILL650/194871 |
作者单位 | 1.Griffith Univ, Australian Rivers Inst, Nathan, Qld 4111, Australia; 2.Univ New England, Armidale, NSW 2351, Australia |
推荐引用方式 GB/T 7714 | Capon, Samantha J.,Reid, Michael A.. Vegetation resilience to mega-drought along a typical floodplain gradient of the southern Murray-Darling Basin, Australia[J],2016,27(5):926-937. |
APA | Capon, Samantha J.,&Reid, Michael A..(2016).Vegetation resilience to mega-drought along a typical floodplain gradient of the southern Murray-Darling Basin, Australia.JOURNAL OF VEGETATION SCIENCE,27(5),926-937. |
MLA | Capon, Samantha J.,et al."Vegetation resilience to mega-drought along a typical floodplain gradient of the southern Murray-Darling Basin, Australia".JOURNAL OF VEGETATION SCIENCE 27.5(2016):926-937. |
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