On the phenology and seeding potential of sea-ice microalgal species
نویسندگان
چکیده
Sea ice is an important habitat for a wide variety of microalgal species. Depending on the species composition, sea can be seeding source pelagic phytoplankton blooms after melt in spring. Sea-ice algal communities were studied over 2 full winter seasons 2014 and 2016 at Rothera Research Station, situated Western Antarctic Peninsula (WAP). Algal pigment patterns microscopic observations combined with photophysiological studies based fluorescence analyses to monitor explain phenology ice-algal Clear succession identified. Young contained mixture including dinoflagellates, cryptophytes diatoms like Chaetoceros spp. Fragillariopsis In winter, severe environmental conditions resulted decline diversity selection towards heterotrophy. Pennate Amphiprora kufferathii Berkeleya adeliensis first dominate nutrient-enriched bottom-ice layers early The bottom exhibited remarkably stable value photoadaptation parameter, Ek, circa 25 µmol photons m–2 s–1. Whereas pennate most abundant spring ice, initial event linked was associated flagellate Haptophyte Phaeocystis antarctica prymnesiophytes Pyramimonas best sustained transition from seawater. Comparison previous shows that observed Ryder Bay characteristic wider sea-ice domain, Arctic Antarctic. Over course this century, WAP predicted experience continuing thinning cover. For near future, we expect especially haptophytes chlorophytes will benefit changes, yet unknown implications carbon fluxes higher trophic levels.
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ژورنال
عنوان ژورنال: Elementa
سال: 2022
ISSN: ['2325-1026']
DOI: https://doi.org/10.1525/elementa.2021.00029