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Article Dans Une Revue Frontiers in Marine Science Année : 2023

Organization of planktonic Tintinnina assemblages in the Atlantic Ocean

Haibo Li
  • Fonction : Auteur
Glen Tarran
  • Fonction : Auteur
Giorgio Dall’olmo
  • Fonction : Auteur
Andrew Rees
  • Fonction : Auteur
Michel Denis
  • Fonction : Auteur
Chaofeng Wang
  • Fonction : Auteur
Gérald Grégori
Yi Dong
  • Fonction : Auteur
Yuan Zhao
  • Fonction : Auteur
Wuchang Zhang
  • Fonction : Auteur
Tian Xiao
  • Fonction : Auteur

Résumé

Marine plankton have different biogeographical distribution patterns. However, it is not clear how the entire plankton assemblage is composed of these species with distinct biogeographical patterns. Tintinnina (tintinnids) is single-celled planktonic protozoa commonly used as model organisms in planktonic studies. In this research, we investigated the organization of Tintinnina assemblages along the Atlantic Meridional Transect (AMT) spanning over 90 degrees of latitude during the 29 th AMT cruise (2019). Tintinnina with high frequency of occurrence was classified into four biogeographic distribution patterns (equatorial, gyre, frontal, and deep Chl a maximum) according to their vertical and horizontal distribution. All species falling within each distribution pattern formed a sub-assemblage. Equatorial sub-assemblage dominated in upper waters of the equatorial zone and gyre centres. Equatorial and frontal sub-assemblages co-dominated in upper waters of the frontal zones. Deep Chlorophyll a maximum Layer (DCM) sub-assemblage dominated in the DCM waters. Some Tintinnina species with high abundance could be used as indicator species of sub-assemblages. The Tintinnina assemblages in the northern and southern hemispheres exhibited asymmetry in terms of species composition. The latitudinal gradient of Tintinnina species richness was bimodal, which was shaped by the superposition of the species number of the four sub-assemblages with latitude. The result of this study contributes to the understanding of Tintinnina assemblage in the equatorial zone and subtropical gyres of the Pacific and Indian Ocean. It is also valuable for predicting the influence of global warming on changes in Tintinnina distribution and species richness.
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hal-04005554 , version 1 (02-03-2023)

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Haibo Li, Glen Tarran, Giorgio Dall’olmo, Andrew Rees, Michel Denis, et al.. Organization of planktonic Tintinnina assemblages in the Atlantic Ocean. Frontiers in Marine Science, 2023, 10, ⟨10.3389/fmars.2023.1082495⟩. ⟨hal-04005554⟩
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