The geographical distribution and (palaeo)ecology of Selenopemphix undulata sp. nov., a new late Quaternary dinoflagellate cyst from the Pacific Ocean

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doi: 10.1016/j.marmicro.2010.10.001
Author(s): Verleye, Thomas J.; Pospelova, Vera; Mertens, Kenneth N.; Louwye, Stephen
Author Affiliation(s): Primary:
Ghent University, Research Unit Palaeontology, Ghent, Belgium
Other:
University of Victoria, Australia
Volume Title: Marine Micropaleontology
Source: Marine Micropaleontology, 78(3-4), p.65-83. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0377-8398 CODEN: MAMIDH
Note: In English. Supplemental information/data is available in the online version of this article. 132 refs.; illus., incl. 2 plates, sketch maps
Summary: Detailed palynological studies in the northeast (NE) Pacific, Strait of Georgia (BC, Canada), southeast (SE) Pacific and northwest Pacific (Dongdo Bay, South Korea) resulted in the recognition of the new dinoflagellate cyst species Selenopemphix undulata sp. nov. This species is restricted to cool temperate to sub-polar climate zones, where it is found in highest relative abundances in highly productive non- to reduced upwelling regions with an annual mean sea-surface temperature (aSST) below 16°C and an annual mean sea-surface salinity (aSSS) between 20 and 35psu. Those observations are in agreement with the late Quaternary fossil records from Santa Barbara Basin (ODP 893; 34°N) and offshore Chile (ODP 1233; 41°S), where this species thrived during the last glacial. This period was characterized by high nutrient availability and the absence of species favoring upwelling conditions. The indirect dependence of S. undulata sp. nov. abundances on nutrient availability during reduced or non-upwelling periods is expressed by the synchronous fluctuations with diatom abundances, since the distribution and growth rates of the latter are directly related with the availability of macronutrients in the surface waters. Abstract Copyright (2011) Elsevier, B.V.
Year of Publication: 2011
Research Program: ODP Ocean Drilling Program
Key Words: 09 Paleontology, Paleobotany; Asia; Biogeography; British Columbia; Canada; Cenozoic; Chile; Dinoflagellata; Dongdo Bay; East Pacific; Far East; Korea; Leg 146; Leg 202; Microfossils; Morphology; New taxa; North America; North Pacific; Northeast Pacific; ODP Site 1233; ODP Site 893; Ocean Drilling Program; Pacific Ocean; Paleoclimatology; Paleoecology; Palynomorphs; Peridiniales; Quaternary; Santa Barbara Basin; Selenopemphix undulata; South America; South Korea; South Pacific; Southeast Pacific; Strait of Georgia; Taxonomy; Upper Quaternary; Western Canada
Coordinates: N341715 N341715 W1200211 W1200212
S410000 S410000 W0742700 W0742700
Record ID: 2011101917
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands