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Group 2i Isochrysidales thrive in marine and lacustrine systems with ice cover
Wang, K.J.; Huang, Y.; Kartzinel, T.R.; Majaneva, M.; Richter, N.; Liao, S.; Andresen, C.S.; Vermassen, F. (2024). Group 2i Isochrysidales thrive in marine and lacustrine systems with ice cover. NPG Scientific Reports 14(1): 11449. https://dx.doi.org/10.1038/s41598-024-62162-4
In: Scientific Reports (Nature Publishing Group). Nature Publishing Group: London. ISSN 2045-2322; e-ISSN 2045-2322, meer
Peer reviewed article  
Beschikbaar in  Auteurs 
Author keywords
    Paleoclimate; Sea ice; Biomarker proxy; Alkenones; Isochrysidales
Auteurs  Top 
  • Wang, K.J.
  • Huang, Y.
  • Kartzinel, T.R.
  • Majaneva, M.
  • Richter, N., meer
  • Liao, S.
  • Andresen, C.S.
  • Vermassen, F., meer
Abstract
    Global warming is causing rapid changes to the cryosphere. Predicting the future trajectory of the cryosphere requires quantitative reconstruction of its past variations. A recently identified sea-ice-associated haptophyte, known as Group 2i Isochrysidales, has given rise to a new sea-ice proxy with its characteristic alkenone distributions. However, apart from the occurrence of Group 2i Isochrysidales in regions with sea ice, and the empirical relationship between C37:4 alkenone abundance and sea-ice concentration, little is known about the ecology of these haptophyte species. Here, we systematically mapped the spatial and temporal occurrence of known Group 2i Isochrysidales based on environmental DNA in both marine and lacustrine environments. Our results indicate Group 2i is widely distributed in icy marine and lacustrine environments in both Northern and Southern Hemisphere, but is absent in warm environments. Temporally, Group 2i is part of the sea-ice algae bloom during the cold seasons, in contrast to other Isochrysidales that bloom in open waters during warm seasons. Our results indicate that ice is a prerequisite for the occurrence of the psychrophilic Group 2i haptophytes in marine and lacustrine ecosystems and further affirms its value for past ice reconstructions.
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