Mots-clés
Domaine semi-aride ; Ecosystème ; Ecosystème aquatique ; Lac ; Mexique ; Phytoplancton ; Poussière ; Puebla ; Sédimentation lacustre ; Zone intertropicaleAquatic ecosystem ; Dust ; Ecosystem ; Lacustrine sedimentation ; Lake ; Mexico ; Phytoplankton ; Puebla ; Semi-arid area ; Tropical zoneCampo semiárido ; Ecosistema ; Ecosistema acuático ; Fitoplancton ; Lago ; México ; Polvo ; Sedimentación lacustre ; Zona intertropicalRelative importance of dust inputs and aquatic biological production as sources of lake sediments in an oligotrophic lake in a semi-arid area
Auteur(s) et Affiliation(s)
OSEGUERA, L.A.
Proyecto de Investigación en Limnología Tropical, FES Iztacala, UNAM, Tlalnepantla, Mexique
Programa de Posgrado en Ciencias del Mar y Limnología, UNAM, Tlalnepantla, Mexique
ALCOCER, J.
Proyecto de Investigación en Limnología Tropical, FES Iztacala, UNAM, Tlalnepantla, Mexique
VILACLARA, G.
Proyecto de Investigación en Limnología Tropical, FES Iztacala, UNAM, Tlalnepantla, Mexique
Description :
The dustfall (DF) and mass sedimentation rate (MSR) in Lake Alchichica, Central Mexico, were studied from June 2006 to June 2008. As expected, the DF in Alchichica was high and similar to that found in other arid and semi-arid areas. However, the MSR was higher than that reported for other oligotrophic lakes. In spite of the oligotrophic status of Lake Alchichica, the large size of the settled phytoplankton (autochthonous, waterborne) is what leads to the high MSR, which surpasses the DF (allochthonous, airborne) derived from whirlwinds originating in easily eroded terrains that are characteristic of arid/semi-arid areas. The results indicate that caution must be taken in considering that the DF amount measured through DF collectors located at the lake shore does actually represent the DF entering into the lake.
Type de document :
Article de périodique
Source :
Earth surface processes and landforms, issn : 0197-9337, 2011, vol. 36, n°. 3, p. 419-426, nombre de pages : 8, Références bibliographiques : 1 p.
Date :
2011
Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley
Langue :
Anglais
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)