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PORTAIL D'INFORMATION GÉOGRAPHIQUE

A 700-year record on the effects of climate and human impact on the southern Cape coast inferred from lake sediments of Eilandvlei, Wilderness Embayment, South Africa

Southern African geomorphology : looking back, moving forward

Auteur(s) et Affiliation(s)

REINWARTH, B.
Physische Geographie, Inst. für Geographie, Friedrich Schiller Univ., Jena, Allemagne
FRANZ, S.
Physische Geographie, Inst. für Geographie, Friedrich Schiller Univ., Jena, Allemagne
BAADE, J.
Physische Geographie, Inst. für Geographie, Friedrich Schiller Univ., Jena, Allemagne
Physische Geographie, Inst. für Geographie, Friedrich Schiller Univ., Jena, Allemagne
KASPER, T.
Physische Geographie, Inst. für Geographie, Friedrich Schiller Univ., Jena, Allemagne
DAUT, G.
Physische Geographie, Inst. für Geographie, Friedrich Schiller Univ., Jena, Allemagne
Biozentrum Klein Flottbek and Botanischer Garten, Univ., Hamburg, Allemagne
KIRSTEN, K.L.
Dept. of Environmental and Geographical Science, Univ., Cape Town, Afrique du Sud
QUICK, L.J.
Dept. of Environmental and Geographical Science, Univ., Cape Town, Afrique du Sud
MEADOWS, M.E.
Dept. of Environmental and Geographical Science, Univ., Cape Town, Afrique du Sud
Physische Geographie, Inst. für Geographie, Friedrich Schiller Univ., Jena, Allemagne
SUMNER, P.D.
Dept. of Geography, Geoinformatics and Meteorology, Univ., Pretoria, Afrique du Sud
NEL, W.
Dept. of Geography and Environmental Science, Univ. of Fort Hare, Alice, Afrique du Sud
HOLMES, P.J.
Dept. of Geography, Univ. of the Free State, Bloemfontein, Afrique du Sud


Description :
The AA. present a lake sediment record spanning the last 670 years from Eilandvlei, a brackish coastal lake situated mid-way between Cape Town and Port Elizabeth. The results from geochemical and sedimentological analyses point to an increase in minerogenic sediment input from the catchment starting around AD 1400. Changes in the seasonal distribution of rainfall during the Little Ice Age may have altered river discharge and increased erosion rates and fluvial sediment transport in pre-colonial times. A rising mean lake level, possibly associated with an altered water balance or relative sea-level rise, may offer an explanation for the deposition of finer sediments. After AD 1450, reduced burial flux of elements associated with autochthonous sediment formation may have resulted from ecological changes in Eilandvlei. Then, increasing sediment and nutrient flux into Eilandvlei is highlighted following the arrival of European colonists and land use change.


Type de document :
Article de monographie

Source :
Geografiska annaler. Series A. Physical geography, issn : 0435-3676, 2013, vol. 95, n°. 4, p. 345-360, nombre de pages : 16, Références bibliographiques : 2 p.

Date :
2013

Editeur :
Pays édition : Suede, Stockholm, Svenska sällskapet för antropologi och geografi

Langue :
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)