气候变化领域集成服务门户(CCPortal): A fiery past: A comparison of glacial and contemporary fire regimes on the Palaeo-Agulhas Plain; Cape Floristic Region

CCPortal

DOI	10.1016/j.quascirev.2019.106059
	A fiery past: A comparison of glacial and contemporary fire regimes on the Palaeo-Agulhas Plain; Cape Floristic Region
	Kraaij T.; Engelbrecht F.; Franklin J.; Cowling R.M.
发表日期	2020
ISSN	0277-3791
卷号	235
英文摘要	Landscape-level fire governs vegetation structure and composition in the contemporary Cape Floristic Region (CFR) and was key to the existence of Middle Stone-Age hunter gatherers on the Palaeo-Agulhas Plain (PAP). However, virtually nothing is known about Pleistocene fire regimes of the CFR. We characterized the fire danger climate of the PAP during the Last Glacial Maximum (LGM; 19–26 ka BP) based on palaeo-climate simulations and explored the severity and seasonality of fire danger weather along west-east and coastal-inland gradients across the PAP. We used knowledge of relationships between contemporary fire climate and contemporary CFR fire regimes to propose LGM fire regimes in relation to simulated LGM fire climate. We found that the severity of fire weather during the LGM across the PAP was significantly higher than present; mean fire danger index scores and the incidence of high fire danger days were greater, while the seasonality of fire weather was more pronounced, exhibiting summer-autumn fire regimes across the PAP. Although a more severe fire climate suggests potentially more frequent fires than present, slower fuel accumulation due to colder temperatures, reduced solar radiation and lower atmospheric CO2 may have partly countered this effect. Our proposed LGM fire regimes predict the vegetation of the PAP to have been dominated by fire tolerant, largely Mediterranean-climate formations such as fynbos, renosterveld and grassland, but is unlikely to have provided a driver for mass seasonal east-west migration of large grazers on the PAP. © 2019 Elsevier Ltd
英文关键词	Data analysis; Fire danger weather severity; Fire frequency; Fire seasonality; Fynbos shrublands; McArthur forest fire danger index; Paleoclimatology; Pleistocene; Regional climate downscaling; Southern Africa
语种	英语
scopus关键词	Climatology; Data reduction; Deforestation; Glacial geology; Vegetation; Down-scaling; Fire danger; Fire frequencies; Mcarthur forest fire danger indices; Paleoclimatology; Pleistocene; Seasonality; Shrublands; Southern Africa; Fires; Cape Floristic Region; comparative study; fire; glacial environment; hunter-gatherer; landscape ecology; Last Glacial Maximum; Mesolithic; paleoclimate; paleoenvironment; Pleistocene; vegetation structure; Agulhas Plain; South Africa; Western Cape
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151509
作者单位	School of Natural Resource Management, Nelson Mandela University, Private Bag X6531, George, Western Cape 6530, South Africa; African Centre for Coastal Palaeoscience, Nelson Mandela University, PO Box 77000, Port Elizabeth, Eastern Cape 6031, South Africa; Global Change Institute, University of the Witwatersrand, Johannesburg, Gauteng 2193, South Africa; Department of Botany and Plant Sciences, University of California – Riverside, 900 University Ave, Riverside, CA 92521, United States
推荐引用方式 GB/T 7714	Kraaij T.,Engelbrecht F.,Franklin J.,et al. A fiery past: A comparison of glacial and contemporary fire regimes on the Palaeo-Agulhas Plain; Cape Floristic Region[J],2020,235.
APA	Kraaij T.,Engelbrecht F.,Franklin J.,&Cowling R.M..(2020).A fiery past: A comparison of glacial and contemporary fire regimes on the Palaeo-Agulhas Plain; Cape Floristic Region.Quaternary Science Reviews,235.
MLA	Kraaij T.,et al."A fiery past: A comparison of glacial and contemporary fire regimes on the Palaeo-Agulhas Plain; Cape Floristic Region".Quaternary Science Reviews 235(2020).