Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.3732/ajb.1700008 |
Fire after a mast year triggers mass recruitment of slender mulga (Acacia aptaneura), a desert shrub with heat-stimulated germination | |
Wright, Boyd R.1,2,3; Fensham, Roderick J.4,5 | |
通讯作者 | Wright, Boyd R. |
来源期刊 | AMERICAN JOURNAL OF BOTANY
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ISSN | 0002-9122 |
EISSN | 1537-2197 |
出版年 | 2017 |
卷号 | 104期号:10页码:1474-1483 |
英文摘要 | PREMISE OF THE STUDY: Fire typically triggers extensive regeneration of plants with heat-stimulated germination by causing short periods of intense soil heating. If plants with heat-stimulated germination are also subject to seed predation and display mast-seeding cycles, postfire recruitment may be contingent on the seedfall density of prefire masts, and on whether granivores are satiated at the time of fire. METHODS: We conducted a longitudinal seedbank study and a mensurative field experiment in central Australia to examine whether fire and the variation in seedfall density across sites in a mast year interact to influence recruitment of slender mulga (Acacia aptaneura), an iteroparous masting shrub with heat-stimulated germination. KEY RESULT: The seedbank study showed seedbank pulsing after masting, with mean seed counts in the upper 4-cm soil layer being 132.8 seeds/m(2) 12-mo after a dense seedfall, but only 3.8 seeds/m(2) following a year with no seed production. Consistent with this, recruitment increased postfire at sites where denser seedfall had occurred during the preburn mast year. Conversely, little recruitment occurred at unburnt populations, irrespective of prefire seedfall density. CONCLUSIONS: We attribute our findings to: (1) elevated soil temperatures during fires stimulating germination of heat-cued seeds; and (2) granivore satiation following masting facilitating assimilation of seeds into the soil seedbank. These results highlight the importance of rare seed-input events for regeneration in fire-prone systems dominated by masting plants, and provide the first example from an arid biome of fire interacting with masting to influence recruitment. |
英文关键词 | Aridity Bayesian statistics Fabaceae fire ecology mass flowering mast seeding predator satiation recruitment reproductive ecology seedbank |
类型 | Article |
语种 | 英语 |
国家 | Australia |
收录类别 | SCI-E |
WOS记录号 | WOS:000413976200011 |
WOS关键词 | CENTRAL AUSTRALIAN RANGELANDS ; ARID ZONE SHRUBS ; EVOLUTIONARY ECOLOGY ; WESTERN-AUSTRALIA ; PREDATOR SATIATION ; WIND POLLINATION ; FRUIT PRODUCTION ; FAGUS-CRENATA ; BURIED SEEDS ; RODENTS |
WOS类目 | Plant Sciences |
WOS研究方向 | Plant Sciences |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/197237 |
作者单位 | 1.Univ New England, Sch Environm & Rural Sci, Bot, Armidale, NSW 2350, Australia; 2.Univ Queensland, Sch Agr & Food Sci, St Lucia, Qld 4072, Australia; 3.Dept Land Resource Management, Northern Terr Herbarium, Alice Springs, NT 0871, Australia; 4.Univ Queensland, Sch Biol Sci, St Lucia, Qld 4072, Australia; 5.Queensland Herbarium, Mt Coot Tha Rd, Brisbane, Qld 4066, Australia |
推荐引用方式 GB/T 7714 | Wright, Boyd R.,Fensham, Roderick J.. Fire after a mast year triggers mass recruitment of slender mulga (Acacia aptaneura), a desert shrub with heat-stimulated germination[J],2017,104(10):1474-1483. |
APA | Wright, Boyd R.,&Fensham, Roderick J..(2017).Fire after a mast year triggers mass recruitment of slender mulga (Acacia aptaneura), a desert shrub with heat-stimulated germination.AMERICAN JOURNAL OF BOTANY,104(10),1474-1483. |
MLA | Wright, Boyd R.,et al."Fire after a mast year triggers mass recruitment of slender mulga (Acacia aptaneura), a desert shrub with heat-stimulated germination".AMERICAN JOURNAL OF BOTANY 104.10(2017):1474-1483. |
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