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Intra- and infra-specific morphological variation in selected coccolithophore species in the equatorial and subequatorial Pacific Ocean

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Title: Intra- and infra-specific morphological variation in selected coccolithophore species in the equatorial and subequatorial Pacific Ocean
Authors: Hagino, Kyoko1 Browse this author →KAKEN DB
Okada, Hisatake Browse this author →KAKEN DB
Authors(alt): 萩野, 恭子1
Keywords: Coccolithophore
Extant
Morphological variation
Biogeography
Emiliania huxleyi
Calcidiscus leptoporus
Umbilicosphaera
Umbellosphaera
Issue Date: 30-Jan-2006
Publisher: Elsevier B.V.
Journal Title: Marine Micropaleontology
Volume: 58
Issue: 3
Start Page: 184
End Page: 206
Publisher DOI: 10.1016/j.marmicro.2005.11.001
Abstract: The ecological preferences of morphological groups within major coccolithophore taxa were studied in surface water samples from the equatorial and subequatorial Pacific Ocean. Emiliania huxleyi was subdivided into three morphological groups: Type A, Type C, and variety corona. The most probable factors limiting the occurrence of E. huxleyi Types A and C were high temperatures and low nutrient concentrations, respectively. E. huxleyi var. corona had an affinity for oligotrophic conditions. Calcidiscus leptoporus ssp. small was adapted to fertile waters. Umbilicosphaera foliosa and Umbilicosphaera sibogae preferred mesotrophic upwelling waters and stratified marginal waters surrounding the upwelling front, respectively. Among the three Umbellosphaera tenuis morphotypes observed in this study (Types I, III, and IV), only Type I was found in very warm tropical surface. Both Types III and IV were found in subtropical waters, and Type III differed from Type IV in that its distribution was constrained to hemi-pelagic waters. Habitat segregation among the morphotypes of major taxa indicates that the observed global distributions of these major taxa are, in fact, combinations of discrete morphological groups.
Relation: http://www.sciencedirect.com/science/journal/03778398
Type: article (author version)
URI: http://hdl.handle.net/2115/5820
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 萩野 恭子

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