Mots-clés
Action anthropique Afrique du Sud Analyse pollinique Datation C 14 Diatomée Géochimie Lac Littoral Niveau lacustre Paléo-environnement Paléo-écologie Petit âge glaciaire Southern Cape Sédiment lacustre Utilisation du sol Variation climatique C 14 dating Climatic variation Coastal environment Diatom Geochemistry Human impact Lacustrine sediment Lake Lake level Land use Little ice age Palaeo-ecology Palaeo-environment Pollen analysis South Africa Acción antrópica Análisis polínico Aprovechamiento del suelo Datación Carbono 14 Diatomea Geoquímica Lago Litoral Nivel lacustre Paleoambiente Paleoecología Pequeña edad glaciar Sedimento lacustre Variación climática África del SurA 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
HABERZETTL, T.
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
HELMSCHROT, J.
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
MÄUSBACHER, R.
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
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)