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dc.contributor.author Verschuren, D.
dc.contributor.author Lamb, Henry F.
dc.contributor.author Darbyshire, I.
dc.date.accessioned 2008-12-16T12:48:47Z
dc.date.available 2008-12-16T12:48:47Z
dc.date.issued 2003
dc.identifier.citation Verschuren , D , Lamb , H F & Darbyshire , I 2003 , ' Vegetation response to rainfall variation and human impact in central Kenya during the past 1100 years ' The Holocene , vol 13 , no. 2 , pp. 285-292 . , 10.1191/0959683603hl618rr en
dc.identifier.issn 0959-6836
dc.identifier.other PURE: 95000
dc.identifier.other dspace: 2160/1690
dc.identifier.uri http://hdl.handle.net/2160/1690
dc.identifier.uri http://hol.sagepub.com/cgi/content/abstract/13/2/285 en
dc.description Lamb, Henry, Darbyshire, I., Verschuren, D., (2003) 'Vegetation response to rainfall variation and human impact in central Kenya during the past 1100 years', The Holocene 13(2) pp.285-292 RAE2008 en
dc.description.abstract Pollen data from a 625 cm sediment core from Crescent Island Crater, a subbasin of Lake Naivasha, Kenya, provide an 1100-year record of vegetation change at a mean time resolution of 15 years. Earlier data from the same core show a record of lake depth (and thus inferred rainfall variation) in the form of changing sedimentary facies, supported by salinity inferences based on diatom and chironomid assemblages. Stratigraphic variation in the abundances of aquatic and semi-aquatic plants and chlorophyte algae generally supports the reconstructed lake depths. Woody Afromontane and woodland plant taxa decreased relative to Poaceae (grasses) during low rainfall periods, and increased during high rainfall periods. A decrease in the extent of lower montane forest coincident with favourable climatic conditions after about ad 1700 was probably caused byKikuyu immigration and population expansion around that time, as indicated by simultaneous appearance of the food crop Zea mays (maize). Increases in ruderal herbaceous and exotic tree pollen during the twentieth century indicate increased local landscape disturbance during the colonial period. There is little direct pollen evidence for accelerating clearance of the montane forest during recent decades. en
dc.format.extent 8 en
dc.language.iso eng
dc.relation.ispartof The Holocene en
dc.title Vegetation response to rainfall variation and human impact in central Kenya during the past 1100 years en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1191/0959683603hl618rr
dc.contributor.institution Institute of Geography & Earth Sciences en
dc.contributor.institution Quaternary Environmental Change Group en
dc.description.status Peer reviewed en


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