Environmental drivers of spring primary production in Hudson Bay
| Autor: | C. J. Mundy, Jens K. Ehn, Laura A. Dalman, Sergey Kirillov, David G. Barber, Jean-Éric Tremblay, Ilka Peeken, Lisa C. Matthes, D. Babb, Simon Bélanger, J. Lee, Madison L. Harasyn |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Atmospheric Science Chlorophyll a Environmental Engineering 010504 meteorology & atmospheric sciences Oceanography 01 natural sciences Algal bloom chemistry.chemical_compound Phytoplankton Sea ice 14. Life underwater 0105 earth and related environmental sciences geography geography.geographical_feature_category Ecology biology 010604 marine biology & hydrobiology Geology Geotechnical Engineering and Engineering Geology biology.organism_classification Diatom chemistry Arctic Environmental science Bloom Bay |
| Zdroj: | EPIC3Elementa: Science of the Anthropocene, 9(1), ISSN: 2325-1026 |
| ISSN: | 2325-1026 |
| DOI: | 10.1525/elementa.2020.00160 |
| Popis: | Pertinent environmental factors influencing the microalgal bloom during sea-ice breakup in Hudson Bay were investigated in June 2018, producing the first observations of late spring primary production in the offshore waters of this vast inland sea. Phytoplankton production was found to commence at the onset of ice melt, with surface nutrient depletion leading to the formation of a subsurface chlorophyll maximum in the open waters of western Hudson Bay. Concurrently, the melting mobile ice cover in central Hudson Bay created favorable conditions for a diatom-dominated under-ice bloom, with photosynthetic characteristics and relatively high production confirming that phytoplankton cells were able to acclimate to increasing light levels. Lower mean values of phytoplankton production and total chlorophyll a (TChl a) concentration observed under the sea ice (414 mg C m–2 d–1 and 33.7 mg TChl a m–2) than those observed in open waters during the late bloom stage in the western region (460 mg C m–2 d–1 and 53.5 mg TChl a m–2) were attributed to reduced under-ice light levels and low surface concentrations of dissolved inorganic nitrogen ( |
| Databáze: | OpenAIRE |
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