干旱区生态环境知识资源中心(Arid): A 14000 year multi-proxy alluvial record of ecotone changes in a Fynbos-Succulent Karoo transition in South Africa

Arid

DOI	10.1016/j.palaeo.2021.110331
	A 14000 year multi-proxy alluvial record of ecotone changes in a Fynbos-Succulent Karoo transition in South Africa
	Scott, L.; Manzano, S.; Carr, A. S.; Cordova, C.; Ochando, J.; Bateman, M. D.; Carrion, J. S.
通讯作者	Scott, L (corresponding author), Univ Free State, Dept Plant Sci, Bloemfontein, South Africa.
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
EISSN	1872-616X
出版年	2021
卷号	569
英文摘要	To address long-standing questions concerning Southern Hemisphere climate dynamics and palaeoecological change in southern Africa, a Late Glacial-Holocene alluvial sediment sequence from the relatively dry interior year-round rainfall zone in South Africa was investigated. The study site borders the Fynbos biome and Succulent Karoo biome ecotone, and comprises a rare stratified sequence of sandy and organic-rich silt deposits, shown to span the last 14,000 years. A high resolution multi-proxy record of ecological change was derived using pollen, phytoliths and organic geochemical analyses. For the period 14-11 ka, significant valley aggradation occurred under relatively drier conditions, followed, during the early and middle Holocene, by alternating phases of humid and dry events with higher stream energy, slower accumulation or subtle seasonality changes. A transition from relatively humid to more arid conditions at 4-3 ka is identified and is consistent in timing with several interior year-round rainfall zone records. Results revealed alternations of fynbos and karroid elements and C-3/C-4 grasses throughout the last fourteen thousand years, but did not suggest large-scale biome shifts. The record joins a growing number of sites contributing to debate over the complex atmospheric-oceanic drivers of palaeoclimate in this region. These data broadly fit to the regional pattern for the southernmost interior of South Africa in showing alternating influences from the westerly winter rain systems in the early Holocene, with a greater contribution from subtropical summer rain system during the middle and later Holocene.
英文关键词	Pollen Southern Hemisphere Younger Dryas OSL Radiocarbon Seasonality
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000636767300013
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向	Physical Geography ; Geology ; Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368822
作者单位	[Scott, L.] Univ Free State, Dept Plant Sci, Bloemfontein, South Africa; [Manzano, S.] Univ Cape Town, Dept Biol Sci, Plant Conservat Unit, HW Pearson Bldg,Private Bag X3, ZA-7701 Rondebosch, South Africa; [Carr, A. S.] Univ Leicester, Sch Geog Geol & Environm, Univ Rd, Leicester LE1 7RH, Leics, England; [Cordova, C.] Oklahoma State Univ, Dept Geog, Stillwater, OK 74078 USA; [Cordova, C.] Kazan Fed Univ, Lab Archaeol, Kazan, Tatarstan, Russia; [Ochando, J.; Carrion, J. S.] Univ Murcia, Dept Plant Biol, Murcia, Spain; [Bateman, M. D.] Univ Sheffield, Dept Geog, Winter St, Sheffield S10 2TN, S Yorkshire, England
推荐引用方式 GB/T 7714	Scott, L.,Manzano, S.,Carr, A. S.,et al. A 14000 year multi-proxy alluvial record of ecotone changes in a Fynbos-Succulent Karoo transition in South Africa[J],2021,569.
APA	Scott, L..,Manzano, S..,Carr, A. S..,Cordova, C..,Ochando, J..,...&Carrion, J. S..(2021).A 14000 year multi-proxy alluvial record of ecotone changes in a Fynbos-Succulent Karoo transition in South Africa.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,569.
MLA	Scott, L.,et al."A 14000 year multi-proxy alluvial record of ecotone changes in a Fynbos-Succulent Karoo transition in South Africa".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 569(2021).