干旱区生态环境知识资源中心(Arid): Characterizing the Meghalayan Stage in southern Africa: A multiproxy record of paleoenvironmental change at the southern margin of the Kalahari

Arid

DOI	10.1016/j.quaint.2021.03.013
	Characterizing the Meghalayan Stage in southern Africa: A multiproxy record of paleoenvironmental change at the southern margin of the Kalahari
	Sobol, Magdalena K.; Chazan, Michael; Scott, Louis; Finkelstein, Sarah A.
通讯作者	Finkelstein, SA (corresponding author)，Univ Toronto, Dept Earth Sci, 22 Ursula Franklin St, Toronto, ON M5S 3B1, Canada.
来源期刊	QUATERNARY INTERNATIONAL
ISSN	1040-6182
EISSN	1873-4553
出版年	2022
卷号	614
英文摘要	In this study we investigate the timing and nature of moisture availability in the Late Holocene by examining a multiproxy paleoenvironmental record from Kathu Pan at the southern edge of the Kalahari. In a region where organic proxy records are scarce, Kathu Pan provides a unique record of changes in past environmental conditions. Pollen, spore, charcoal, and stable isotope records were obtained from organic deposits at Kathu Pan and examined within a radiocarbon-constrained chronological framework. The Kathu Pan record registers a relatively moist phase occurring between 4.8 ka and 2.5 ka cal BP. Local environmental conditions at Kathu Pan shift gradually beginning around the terminal Northgrippian similar to 4.8 ka cal BP. Kathu Pan reaches maximum moisture availability with marsh-like conditions signaled by increased organic content, dominance of Cyperaceae pollen, presence of freshwater fungi, and delta C-13 values consistent with local C-3 vegetation, around the inception of the Meghalayan Stage, although due to uncertainties in the age-depth model these changes may have taken place 1-2 centuries on either side of the formal date for the onset of the Meghalayan at 4.2 ka cal BP. This interval also corresponds with the highest charcoal concentrations, indicating the importance of adequate moisture conditions to support the growth of biomass which eventually becomes a fuel source. The moist phase lasts ca. 2000 years until a hypothesized shift to arid conditions occurs c. 2.5 ka cal BP leading to a change in local hydroclimate that may have terminated the accumulation of organic-bearing sediments.
英文关键词	Paleoecology Paleo-fire Charcoal Pollen Savanna biome Holocene
类型	Article
语种	英语
收录类别	SCI-E ; SSCI
WOS记录号	WOS:000740432900002
WOS关键词	NORTHERN CAPE PROVINCE ; WONDERWERK CAVE ; CLIMATE-CHANGE ; AKKADIAN EMPIRE ; HIGH-RESOLUTION ; SOURCE AREA ; FREE STATE ; POLLEN ; STRATIGRAPHY ; DYNAMICS
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376848
作者单位	[Sobol, Magdalena K.; Finkelstein, Sarah A.] Univ Toronto, Dept Earth Sci, 22 Ursula Franklin St, Toronto, ON M5S 3B1, Canada; [Chazan, Michael] Univ Toronto, Dept Anthropol, Toronto, ON M5S 2S2, Canada; [Chazan, Michael] Univ Witwatersrand, Evolutionary Studies Inst, 1 Jan Smuts Ave, ZA-2000 Johannesburg, South Africa; [Scott, Louis] Univ Free State, Dept Plant Sci, POB 339, ZA-9300 Bloemfontein, South Africa
推荐引用方式 GB/T 7714	Sobol, Magdalena K.,Chazan, Michael,Scott, Louis,et al. Characterizing the Meghalayan Stage in southern Africa: A multiproxy record of paleoenvironmental change at the southern margin of the Kalahari[J],2022,614.
APA	Sobol, Magdalena K.,Chazan, Michael,Scott, Louis,&Finkelstein, Sarah A..(2022).Characterizing the Meghalayan Stage in southern Africa: A multiproxy record of paleoenvironmental change at the southern margin of the Kalahari.QUATERNARY INTERNATIONAL,614.
MLA	Sobol, Magdalena K.,et al."Characterizing the Meghalayan Stage in southern Africa: A multiproxy record of paleoenvironmental change at the southern margin of the Kalahari".QUATERNARY INTERNATIONAL 614(2022).