干旱区生态环境知识资源中心(Arid): Palaeovegetation changes recorded in Palaeolake Olduvai OGCP Core 2A (2.09-2.12 Ma) Naibor Soit Formation Olduvai Gorge, Tanzania

Arid

DOI	10.1016/j.palaeo.2020.109928
	Palaeovegetation changes recorded in Palaeolake Olduvai OGCP Core 2A (2.09-2.12 Ma) Naibor Soit Formation Olduvai Gorge, Tanzania
	Rodriguez-Cintas, A.; Albert, R. M.; Bamford, M. K.; Stanistreet, I. G.; Stollhofen, H.; Stone, J. R.; Rivera-Rondon, C.; Pronzato, R.; Njau, J. K.; Schick, K.; Toth, N.
通讯作者	Albert, RM
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
EISSN	1872-616X
出版年	2020
卷号	557
英文摘要	For five decades Olduvai Gorge has been a key site to reconstruct and understand the relationship between environmental and landscape conditions and use of affordances by early African hominin populations. Following the first Olduvai Gorge Coring project (OGCP) during 2014, a multiproxy microbiological analysis, which includes phytoliths, pollen, diatoms, sponge spicules and chrysophyte cysts, was undertaken on samples collected from various borehole cores. The aim of the study is to better understand palaeoenvironmental and palaeovegetation conditions and changes through time and their relationship to hominin presence and evolution. This study details the first palaeobotanical and palaeoenvironmental study of Borehole 2A at Olduvai Gorge. It represents the as yet oldest known sedimentary sequence in the Olduvai Basin for a portion of the pre-Bed I Naibor Soit Formation; this is a unit that is not accessible in any natural exposures in Olduvai Gorge, and has only recently been encountered by drilling. Here we present the results from a particularly phytolith-prone portion between similar to 2.09 Ma and 2.12 Ma. Phytolith results indicate a savannah environment dominated by grasses, where Poaceae were a key component and where the C-3 Pooideae grasses were mostly dominant, alternating with C-4 grasses. Oscillations between grass subfamilies, C-3 Pooideae, C-4 Chloridoideae, and C-4 Panicoideae to lesser degrees, indicate five substantial climatic shifts, varying between more humid and arid conditions. Associated with phytoliths, freshwater indicators such as diatoms, sponge spicules and chrysophyte cysts were also identified, suggesting the presence of wetlands in the lake catchment area. Pollen is extremely rare in the sediments but when present, comprises fungal spores and Poaceae pollen, thus supporting the wetland and grassland reconstructions, respectively. These results offer for the first time, a whole picture of the palaeovegetation and associated palaeoenvironments for this pre-Bed I period. Together with previous results from other areas and chronological periods, they improve our understanding of the evolution and adaptation of early hominins and their close relationship to the surrounding landscape.
英文关键词	East Africa Pleistocene Palaeoenvironmental reconstruction Phytoliths Diatoms Sponge spicules
类型	Article
语种	英语
收录类别	SCI-E ; SSCI
WOS记录号	WOS:000565723200010
WOS关键词	MODERN PHYTOLITH ASSEMBLAGES ; LOWERMOST-BED-II ; EAST-AFRICA ; PALEOECOLOGICAL SIGNIFICANCE ; RESTIONACEAE PHYTOLITHS ; ARCHAEOLOGICAL RECORD ; FAULT COMPARTMENTS ; LAETOLIL BEDS ; SOUTH COAST ; FLK NORTH
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/2XILL650/326020
作者单位	[Rodriguez-Cintas, A.; Albert, R. M.; Rivera-Rondon, C.] Univ Barcelona, Fac Geog & Hist, Dept Hist & Arqueol, ERAAUB, C Montalegre 6-8, Barcelona 08001, Spain; [Albert, R. M.] ICREA, Pg Lluis Co 23, Barcelona, Spain; [Albert, R. M.; Bamford, M. K.] Univ Witwatersrand, Evolutionary Studies Inst, Johannesburg, South Africa; [Stanistreet, I. G.] Univ Liverpool, Dept Earth Ocean & Ecol Sci, Brownlow St,POB 147, Liverpool L69 3GP, Merseyside, England; [Stanistreet, I. G.; Njau, J. K.; Schick, K.; Toth, N.] Stone Age Inst, Bloomington, IN 47407 USA; [Stollhofen, H.] Friedrich Alexander Univ FAU Erlangen Nurnberg, GeoZentrum Nordbayern, Schlossgarten 5, D-91054 Erlangen, Germany; [Stone, J. R.] Indiana State Univ, Dept Earth & Environm Syst, 600 Chestnut St, Terre Haute, IN 47809 USA; [Rivera-Rondon, C.] Pontificia Univ Javeriana, Dept Biol, Unidad Ecol & Sistemat, Cra 7 40-82, Bogota 110231, Colombia; [Pronzato, R.] Univ Genoa, Dipartimento Sci Terra Ambiente & Vita DISTAV, Corso Europa 26, I-16132 Genoa, Ital...
推荐引用方式 GB/T 7714	Rodriguez-Cintas, A.,Albert, R. M.,Bamford, M. K.,et al. Palaeovegetation changes recorded in Palaeolake Olduvai OGCP Core 2A (2.09-2.12 Ma) Naibor Soit Formation Olduvai Gorge, Tanzania[J],2020,557.
APA	Rodriguez-Cintas, A..,Albert, R. M..,Bamford, M. K..,Stanistreet, I. G..,Stollhofen, H..,...&Toth, N..(2020).Palaeovegetation changes recorded in Palaeolake Olduvai OGCP Core 2A (2.09-2.12 Ma) Naibor Soit Formation Olduvai Gorge, Tanzania.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,557.
MLA	Rodriguez-Cintas, A.,et al."Palaeovegetation changes recorded in Palaeolake Olduvai OGCP Core 2A (2.09-2.12 Ma) Naibor Soit Formation Olduvai Gorge, Tanzania".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 557(2020).