Pollen transport and deposition in riverine and marine environments within the humid tropics of northeastern Australia

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Abstract

Mechanisms of pollen transport in the humid tropics region of northeastern Australia were investigated to support the interpretation of a long Quaternary pollen record from ODP Site 820 located on the adjacent continental slope. Pollen analysis of surface sediment samples from the channels of two major river catchments demonstrated internal consistency in pollen spectra and little fluvial pollen sorting in relation to sediment variation. Differences in modern pollen spectra between catchments reflect existing variation in vegetation cover that, in turn, reflects climatic differences between catchments. Recent pollen spectra from top samples of the ODP core have sufficient in common with the riverine samples to suggest that the rivers are contributing a major pollen component to the offshore sediments, but these have been size sorted by marine action. Recent pollen samples from core tops taken from the Grafton Passage on the continental shelf that was thought to be the major passage for pollen transport to ODP Site 820 show significant differences to both riverine and ODP samples and suggest that pollen are dispersed across the continental shelf and through the outer Great Barrier Reef system in a more complex way than anticipated. © 2004 Elsevier B.V. All rights reserved.

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Moss, P. T., Kershaw, A. P., & Grindrod, J. (2005). Pollen transport and deposition in riverine and marine environments within the humid tropics of northeastern Australia. Review of Palaeobotany and Palynology, 134(1–2), 55–69. https://doi.org/10.1016/j.revpalbo.2004.11.003

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