1. Organization of planktonic Tintinnina assemblages in the Atlantic Ocean
- Author
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Li, Haibo, Tarran, Glen, Dall’olmo, Giorgio, Rees, Andrew, Denis, Michel, Wang, Chaofeng, Grégori, Gérald, Dong, Yi, Zhao, Yuan, Zhang, Wuchang, Xiao, Tian, Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), The Atlantic Meridional Transect is funded by the UK NaturalEnvironment Research Council through its National CapabilityLong-term Single Centre Science Programme, Climate-LinkedAtlantic Sector Science (CLASS) (grant number NE/R015953/1).This study contributes to the international IMBeR project and iscontribution number 382 of the AMT programme. This work wassupported by the Strategic Priority Research Program of theChinese Academy of Sciences (Grant No. XDB42000000),National Natural Science Foundation of China (Grant Numbers41706192, 42076139 and 41806178), and the InternationalCooperation Project-Dynamics and Function of MarineMicroorganisms (IRP-DYF2M): insight from physics andremote sensing, CNRS-CAS.
- Subjects
Global and Planetary Change ,[SDE]Environmental Sciences ,Ocean Engineering ,Aquatic Science ,Oceanography ,Water Science and Technology - Abstract
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 29th 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.
- Published
- 2023