干旱区生态环境知识资源中心(Arid): Distinct phases of natural landscape dynamics and intensifying human activity in the central Kenya Rift Valley during the past 1300 years

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DOI	10.1016/j.quascirev.2019.06.009
	Distinct phases of natural landscape dynamics and intensifying human activity in the central Kenya Rift Valley during the past 1300 years
	van der Plas, Geert W.1; De Cort, Gijs 1,2; Petek-Sargeant, Nik 3; Wuytack, Tabitha 1; Colombaroli, Daniele 1,6; Lane, Paul J.4,5; Verschuren, Dirk 1
通讯作者	van der Plas, Geert W. ; Verschuren, Dirk
来源期刊	QUATERNARY SCIENCE REVIEWS
ISSN	0277-3791
EISSN	1873-457X
出版年	2019
卷号	218 页码:91-106
英文摘要	Socio-ecological stresses currently affecting the semi-arid regions of equatorial East Africa are driving environmental changes that need to be placed in a proper context of long-term human-climate-landscape interaction. Here we present a detailed reconstruction of past human influences on the landscape of the central Kenya Rift Valley, against the backdrop of natural climate-driven ecosystem dynamics over the past 1300 years. Proxy records of vegetation dynamics (pollen), animal husbandry (fungal spores), biomass burning (charcoal) and soil mobilization (clastic mineral influx) extracted from the continuous depositional archive of Lake Bogoria reveal six distinct phases of human activity. From ca 700 to 1430 CE, strong primary response of savanna woodland ecotonal vegetation to climatic moisture-balance variation suggests that anthropogenic influence on regional ecosystem dynamics was limited. The first unambiguous ecological signature of human activities involves a mid-15th century reduction of woodland/forest trees followed by the appearance of cereal pollen, both evidence for mixed farming. From the mid-17th century, animal husbandry became a significant ecological factor and reached near-modern levels by the mid-19th century, after severe early-19th century drought had substantially changed human-landscape interaction. A short-lived peak in biomass burning and evidence for soil mobilization in low-lying areas of the Bogoria catchment likely reflects the known 19th-century establishment of irrigation agriculture, while renewed expansion of forest and woodland trees reflect the return of a wetter climate and abandonment of other farmland. Since the mid-20th century, the principal signature of human activity within the Lake Bogoria catchment is the unprecedented increase in clastic sediment flux, reflecting widespread soil erosion associated with rapidly intensifying land use. (C) 2019 Elsevier Ltd. All rights reserved.
英文关键词	Anthropocene Climate-human interaction Disturbance ecology East Africa Kenya Rift Valley Lake Bogoria Landscape ecology Paleoecology Vegetation dynamics
类型	Article
语种	英语
国家	Belgium ; England ; Sweden
收录类别	SCI-E ; SSCI
WOS记录号	WOS:000480378000007
WOS关键词	HUMAN-ENVIRONMENT INTERACTIONS ; LATE-HOLOCENE ; VEGETATION DYNAMICS ; TROPICAL AFRICA ; POLLEN RECORDS ; LAKE BOGORIA ; EAST-AFRICA ; LAND-COVER ; CLIMATE ; VARIABILITY
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
来源机构	University of London
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218277
作者单位	1.Univ Ghent, Dept Biol, Limnol Unit, KL Ledeganckstr 35, B-9000 Ghent, Belgium; 2.Royal Museum Cent Africa, Dept Earth Sci, B-3080 Tervuren, Belgium; 3.British Museum, Dept Africa Oceania & Amer, Great Russell St, London WC1B 3DG, England; 4.Univ Cambridge, Dept Archaeol, Downing St, Cambridge CB2 3DZ, England; 5.Uppsala Univ, Dept Archaeol & Ancient Hist, S-75236 Uppsala, Sweden; 6.Royal Holloway Univ London, Ctr Quaternary Res, Dept Geog, Egham TW20 0EX, Surrey, England
推荐引用方式 GB/T 7714	van der Plas, Geert W.,De Cort, Gijs,Petek-Sargeant, Nik,et al. Distinct phases of natural landscape dynamics and intensifying human activity in the central Kenya Rift Valley during the past 1300 years[J]. University of London,2019,218:91-106.
APA	van der Plas, Geert W..,De Cort, Gijs.,Petek-Sargeant, Nik.,Wuytack, Tabitha.,Colombaroli, Daniele.,...&Verschuren, Dirk.(2019).Distinct phases of natural landscape dynamics and intensifying human activity in the central Kenya Rift Valley during the past 1300 years.QUATERNARY SCIENCE REVIEWS,218,91-106.
MLA	van der Plas, Geert W.,et al."Distinct phases of natural landscape dynamics and intensifying human activity in the central Kenya Rift Valley during the past 1300 years".QUATERNARY SCIENCE REVIEWS 218(2019):91-106.