Novel combination coccospheres from Helicosphaera spp indicate complex relationships between species

Sturm, D, Langer, G and Wheeler, G 2022 Novel combination coccospheres from Helicosphaera spp indicate complex relationships between species. Journal of Plankton Research, fbac044.

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doi/10.1093/plankt/fbac044/6670720 - Published Version
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Coccolithophores play an important role in global biogeochemical cycling, but many aspects of their ecology remain poorly understood, including their heteromorphic haplo-diplontic life cycle. The presence of combination coccospheres in environmental samples, which represent a transition between the lightly calcified haploid (HOL) and heavily calcified diploid (HET) life phases, provides crucial evidence linking the two life cycle phases of a particular species. Here, we describe combination coccospheres from the Southern Ocean that show a novel association between Helicosphaera hyalina (HET) and Helicosphaera HOL catilliferus type. The ability of Helicosphaera HET and HOL morphospecies to form multiple different combinations indicates a substantial complexity in the relationships between life cycle phases in this group. The findings suggest recent divergence within the Helicosphaera lineage may have resulted in significant inter- and intra-specific variability, with cryptic speciation in one or both life cycle phases contributing to their ability to form multiple HET/HOL associations.

Item Type: Publication - Article
Additional Keywords: Coccolithophores, Life-cycle, Combination-coccosphere, Haplo-diplontic, Southern Ocean, Speciation, Haptophyta
Subjects: Aquaculture
Ecology and Environment
Marine Sciences
Divisions: Marine Biological Association of the UK > Ocean Biology
Depositing User: Tamar Atkinson
Date made live: 01 Sep 2022 11:06
Last Modified: 09 Feb 2024 15:49

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