Impacts of rapid sea‐level rise on mangrove deposit erosion: application of taraxerol and Rhizophora records |
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| Authors: | Jung-Hyun Kim Lydie Dupont Hermann Behling Gerard J M Versteegh |
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| Institution: | 1. FB5 Geowissenschaften, Universität Bremen, Klagenfurterstrasse, D-28359 Bremen, Germany;2. Koninklijk Nederlands Instituut voor Onderzoek der Zee (NIOZ), PO Box 59, 1790 AB Den Burg, The Netherlands |
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| Abstract: | We investigated a well‐dated marine sediment core from the tropical SE Atlantic covering the last 25 kyr, applying taraxerol and Rhizophora pollen as organic geochemical and palynological proxies for mangrove, respectively. Taraxerol records are positively correlated with Rhizophora pollen records, showing an enhanced supply of mangrove materials into deep‐sea environments during the last deglaciation (Termination I). Sedimentation rates peaked during Meltwater Pulses 1A and 1B, which were associated with the maxima of taraxerol and Rhizophora pollen. This study supports the view that mangrove input was dominantly controlled by erosion of mangrove‐rich shelf sediments during the transgressions. Whether reworked materials were penecontemporaneous or from much older deposits formed during previous sea‐level cycles is discussed. Copyright © 2005 John Wiley & Sons, Ltd. |
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| Keywords: | mangrove taraxerol Rhizophora pollen sea‐level change tropical West Africa |
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