Biodiversity of Tintinnids (Tintinnida) in Khanh Hoa - Binh Thuan waters

Kieu, Nguyen Thi; Phan-Tan, Luom; Vinh, Nguyen Tam; Nguyen-Ngoc, Lam; Montoya, Joseph P.; Doan-Nhu, Hai

doi:10.15625/0866-7160/v39n4.11033

Cited by 1 publication

(1 citation statement)

References 5 publications

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“…Undella clevei was also found in transition zone waters such as the Tsushima Strait ( Kim et al, 2012 ), Transect 140°E, 30–35°N ( Gómez, 2007 ), and the California Current ( Dolan et al, 2013a ). However, its occurrence was also reported in the Mediterranean Sea ( Dolan, 2017 ; Njire et al, 2019 ), the western tropical Pacific ( Kieu et al, 2017 ; Li et al, 2018 ), the central equatorial Pacific ( Gómez, 2007 ), and the South Pacific ( Dolan et al, 2006 ). Therefore, although we classified U. clevei as a transition zone species, it might be a widespread warm water species.…”

Section: Discussionmentioning

confidence: 98%

Summertime Tintinnid Community in the Surface Waters Across the North Pacific Transition Zone

Xuan

Wang

et al. 2021

Front. Microbiol.

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Located from 35° to 45° latitude in both hemispheres, the transition zone is an important region with respect to the planktonic biogeography of the sea. However, to the best of our knowledge, there have been no reports on the existence of a tintinnid community in the transition zone. In this research, tintinnids along two transects across the North Pacific Transition Zone (NPTZ) were investigated in summer 2016 and 2019. Eighty-three oceanic tintinnid species were identified, 41 of which were defined as common oceanic species. The common oceanic species were further divided into five groups: boreal, warm water type I, warm water type II, transition zone, and cosmopolitan species. Undella californiensis and Undella clevei were transition zone species. Other species, such as Amphorides minor, Dadayiella ganymedes, Dictyocysta mitra, Eutintinnus pacificus, Eutintinnus tubulosus, Protorhabdonella simplex, and Steenstrupiella steenstrupii, were the most abundant in the NPTZ but spread over a much larger distribution region. Species richness showed no obvious increase in the NPTZ. Boreal, transition zone, and warm water communities were divided along the two transects. Tintinnid transition zone community mainly distributed in regions with water temperatures between 15 and 20°C. The tintinnid lorica oral diameter size classes were dominated by the 24–28 μm size class in three communities, but the dominance decreased from 66.26% in the boreal community to 48.85% in the transition zone community and then to 22.72% in the warm water community. Our research confirmed the existence of tintinnid transition zone species and community. The abrupt disappearance of warm water type I species below 15°C suggested that this group could be used as an indicator of the northern boundary of the NPTZ.

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