气候变化领域集成服务门户(CCPortal): Distinct phases of natural landscape dynamics and intensifying human activity in the central Kenya Rift Valley during the past 1300 years

CCPortal

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 G.W.; De Cort G.; Petek-Sargeant N.; Wuytack T.; Colombaroli D.; Lane P.J.; Verschuren D.
发表日期	2019
ISSN	0277-3791
起始页码	91
结束页码	106
卷号	218
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. © 2019 Elsevier Ltd
英文关键词	Anthropocene; Climate-human interaction; Disturbance ecology; East Africa; Kenya Rift Valley; Lake Bogoria; Landscape ecology; Paleoecology; Vegetation dynamics
语种	英语
scopus关键词	Animals; Catchments; Charcoal; Ecosystems; Forestry; Geologic models; Lakes; Land use; Landforms; Runoff; Soils; Vegetation; Anthropocene; Disturbance ecology; East Africa; Human interactions; Kenya rift valleys; Landscape ecology; Paleoecology; Vegetation dynamics; Dynamics; animal husbandry; Anthropocene; biomass burning; catchment; clastic sediment; disturbance; drought; ecosystem dynamics; ecotone; environmental factor; human activity; landscape change; nineteenth century; paleoenvironment; semiarid region; vegetation dynamics; Baringo; East Africa; East African Rift; Kenya; Kenya Rift; Lake Bogoria; Animalia; Bogoria
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/151856
作者单位	Limnology Unit, Department of Biology, Ghent University, K.L. Ledeganckstraat 35, Gent, B-9000, Belgium; Department of Earth Sciences, Royal Museum for Central Africa, B-3080 Tervuren, Belgium; Department of Africa, Oceania and the Americas, The British Museum, Great Russell Street, London, WC1B 3DG, United Kingdom; Department of Archaeology, University of Cambridge, Downing Street, Cambridge, CB2 3DZ, United Kingdom; Department of Archaeology & Ancient History, Uppsala University, Uppsala, S-752 36, Sweden
推荐引用方式 GB/T 7714	van der Plas G.W.,De Cort G.,Petek-Sargeant N.,et al. Distinct phases of natural landscape dynamics and intensifying human activity in the central Kenya Rift Valley during the past 1300 years[J],2019,218.
APA	van der Plas G.W..,De Cort G..,Petek-Sargeant N..,Wuytack T..,Colombaroli D..,...&Verschuren D..(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.
MLA	van der Plas G.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).