Exploring the source-to-sink residence time of terrestrial pollen deposited offshore Westland, New Zealand

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dc.contributor.authorRyan, MTen_AU
dc.contributor.authorNewnham, RMen_AU
dc.contributor.authorDunbar, GBen_AU
dc.contributor.authorVandergoes, MJen_AU
dc.contributor.authorRees, ABHen_AU
dc.contributor.authorNeil, Hen_AU
dc.contributor.authorCallard, SLen_AU
dc.contributor.authorAlloway, BVen_AU
dc.contributor.authorBostock, HCen_AU
dc.contributor.authorHua, Qen_AU
dc.contributor.authorAnderson, BMen_AU
dc.date.accessioned2016-05-20T05:00:55Zen_AU
dc.date.available2016-05-20T05:00:55Zen_AU
dc.date.issued2016-07-01en_AU
dc.date.statistics2016-05-20en_AU
dc.description.abstractThe occurrence of terrestrial palynomorphs in Quaternary marine sedimentary sequences allows for direct land–sea correlations and provides a means for transferring Marine Isotope Stage chronologies to terrestrial records that extend beyond the range of radiocarbon dating. Both of these important applications require an implicit assumption that the lag between pollen release and final deposition on the seafloor – here referred to as source-to-sink residence time – is negligible in relation to the chronological resolution of the sedimentary sequence. Most studies implicitly assume zero lag, and where studies do take palynomorph residence time into account, its magnitude is rarely quantified. In Westland, New Zealand, fluvial transport is the main source of delivery of terrestrial pollen offshore to the adjacent East Tasman Sea. We radiocarbon-dated organic matter carried and deposited by contemporary Westland rivers that drain catchments with varying degrees of disturbance. The ages obtained ranged widely from essentially modern (i.e., − 57 ± 22 cal yr BP) to 3583 ± 188 cal yr BP, suggesting that precisely constraining the residence time in this region is unlikely to be achieved. We also compared the timing of four palynomorph events characterising Westland's late Pleistocene, along with the well-dated Kawakawa/Oruanui Tephra (KOT), between marine core MD06-2991 and four terrestrial records from Westland. Critically, all palynomorph events and the KOT are chronologically indistinguishable with respect to the independently dated marine and terrestrial records, supporting the general principle of transferring the marine chronology onto the terrestrial records in this setting. In other regions, particularly those lacking the high soil production and erosion rates that characterise Westland, we suggest that similar tests of marine residence time should be conducted before assumptions of zero or negligible lag are invoked.© 2016, Elsevier B.V.en_AU
dc.identifier.citationRyan, M. T., Newnham, R. M., Dunbar, Gavin B., Vandergoes, M. J., Rees, A.B. H., Neil, H., Callard, S. L., Alloway, B. V., Hua, Q., & Anderson, B. M. (2016). Exploring the source-to-sink residence time of terrestrial pollen deposited offshore Westland, New Zealand. Review of Palaeobotany and Palynology, 230, 37-46. doi:10.1016/j.revpalbo.2016.03.005en_AU
dc.identifier.govdoc6619en_AU
dc.identifier.issn0034-6667en_AU
dc.identifier.journaltitleReview of Palaeobotany and Palynologyen_AU
dc.identifier.pagination37-46en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.revpalbo.2016.03.005en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/6839en_AU
dc.identifier.volume230en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectPollenen_AU
dc.subjectOffshore sitesen_AU
dc.subjectSinksen_AU
dc.subjectHousesen_AU
dc.subjectTerrestrial ecosystemsen_AU
dc.subjectNew Zealanden_AU
dc.titleExploring the source-to-sink residence time of terrestrial pollen deposited offshore Westland, New Zealanden_AU
dc.typeJournal Articleen_AU
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