New observations of Papulifères, putative ciliate cysts, from the plankton of the Chukchi Sea (Western Arctic Ocean) in August of 2023

• Published in: Acta Protozoologica
• Main Authors: Dolan, John, R, Yang, Eun, Jin, Moon, Jong-Kuk
• Other Authors: Laboratoire d'océanographie de Villefranche (LOV), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Korea Polar Research Institute (KOPRI)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2024
• Subjects: Aquatic ecosystems; eukaryotic microbial communities; climate effects; microbial heterotrophic food webs; microbial productivity Fusopsis; Piropsis; Sphaeropsis; microzooplankton; tintinnids; oligotrichs; [SDV.BID]Life Sciences [q-bio]/Biodiversity; [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography; [SDV.MP.PRO]Life Sciences [q-bio]/Microbiology and Parasitology/Protistology; Arctic; Arctic Ocean; Chukchi Sea; Chukchi
• Online Access: https://hal.science/hal-04547960; https://hal.science/hal-04547960/document; https://hal.science/hal-04547960/file/AP_2020_Dolan21.pdf; https://doi.org/10.4467/16890027AP.24.001.19426

International audience We recently documented the existence of 26 different forms of Papulifères, presumptive ciliate cysts, from plankton net tow material of the Chukchi Sea gathered in 2015, 2021, and 2022. The forms appeared to be rare, found in only 7 of the 308 samples taken in annual August surveys from 2010 to 2022. Thus, we were surprised to find them relatively common and widespread in samples gathered in August of 2023. We found 18 different Papulifére forms, 8 of which appear to be new forms, in samples from 19 of the 36 stations sampled. They were found in localities ranging from 70.5°N to 80°N. Here we report on these Papulifére forms found in 2023, providing information on morphologies and geographical distributions. With this report we have expanded the catalogue of observed Papulifére, and photographed, forms of the Chukchi Sea to a grand total of 34 of morphologically distinct forms. However, we continue to urge caution in assigning a ciliate identity to any given Papulifére form in the absence of corroborating data.