Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1111/jvs.13148 |
Does above-average rainfall stimulate a recruitment pulse in semi-arid woodlands of southeastern Australia? | |
Kenny, Sally A.; Moxham, Claire | |
通讯作者 | Kenny, SA |
来源期刊 | JOURNAL OF VEGETATION SCIENCE
![]() |
ISSN | 1100-9233 |
EISSN | 1654-1103 |
出版年 | 2022 |
卷号 | 33期号:5 |
英文摘要 | Questions Regeneration success of semi-arid and arid regions worldwide is episodic and often linked to large rainfall events in consecutive years. It is also influenced by past and current land use, seed availability and herbivore grazing. This is particularly true for four dominant canopy trees - Allocasuarina luehmannii (Buloke), Casuarina pauper (Belah), Callitris gracilis (Slender Cypress Pine) and Myoporum platycarpum (Sugarwood) - within southeastern Australia semi-arid woodlands. These species also apply hedge-betting when responding to resource pulses with mass germination while low-level background recruitment continues. We asked if drought-breaking rainfall stimulated a germination pulse of these species and if it did, how did other external factors (grazing pressure from rabbits/hares, seed source, suitable seedbed) influence seedling abundance. We also asked if evidence of continuous recruitment had occurred during 14 years of drought by exploring trends in juvenile abundance. Location Victorian Mallee semi-arid woodlands, southeastern Australia. Methods We recorded seedling and juvenile abundance of the four dominant canopy species at 310 1-ha sites within semi-arid woodlands. Seedling presence was explored in relation to rainfall, tree density, ground cover and herbivory. Juvenile presence was explored in relation to rainfall, seedling and tree density, total plant cover and herbivory. Results Seedling and juvenile abundance were positively correlated with more mature trees, higher rainfall and no herbivory. Juvenile abundance was also positively correlated with more seedlings. There were more seedlings and juveniles at sites where rabbits/hares were present. Conclusions Above-average rainfall was positively correlated with initiation of recruitment; however, there was limited net recruitment of the four dominant canopy species indicating other factors are influencing germination (e.g. seed viability) or that seedlings are not surviving. The long-term survival of these semi-arid woodlands is in jeopardy without a concerted effort to maintain and improve their condition through revegetation works, weed removal and herbivore management. |
英文关键词 | Allocasuarina luehmannii Callitris gracilis canopy trees Casuarina pauper grazing pressure Myoporum platycarpum rainfall recruitment semi-arid |
类型 | Article |
语种 | 英语 |
收录类别 | SCI-E |
WOS记录号 | WOS:000855190200001 |
WOS关键词 | ARID-ZONE ; RECOVERY PROCESSES ; SOIL SEEDBANK ; GRAZING LANDS ; SHRUBS ; REGENERATION ; RABBITS ; RANGELAND ; DYNAMICS ; SHEEP |
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/2XILL650/393630 |
推荐引用方式 GB/T 7714 | Kenny, Sally A.,Moxham, Claire. Does above-average rainfall stimulate a recruitment pulse in semi-arid woodlands of southeastern Australia?[J],2022,33(5). |
APA | Kenny, Sally A.,&Moxham, Claire.(2022).Does above-average rainfall stimulate a recruitment pulse in semi-arid woodlands of southeastern Australia?.JOURNAL OF VEGETATION SCIENCE,33(5). |
MLA | Kenny, Sally A.,et al."Does above-average rainfall stimulate a recruitment pulse in semi-arid woodlands of southeastern Australia?".JOURNAL OF VEGETATION SCIENCE 33.5(2022). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。