Spatial and temporal variations in variable fluoresence in the Ross Sea (Antarctica): Oceanographic correlates and bloom dynamics

Autor:	Robert B. Dunbar, Zbigniew Kolber, Walker O. Smith, Peter N. Sedwick, Giacomo R. DiTullio, Jill A. Peloquin, David A. Hutchins, Sasha Tozzi, Matthew C. Long
Rok vydání:	2013
Předmět:	Water mass Chlorophyll a fungi Aquatic Science Spring bloom Biogenic silica Oceanography Photosynthetic capacity chemistry.chemical_compound Geography chemistry Phytoplankton Dominance (ecology) Photic zone
Zdroj:	Deep Sea Research Part I: Oceanographic Research Papers. 79:141-155
ISSN:	0967-0637
Popis:	During two cruises to the Ross Sea, Antarctica in austral spring and summer, fast repetition rate fluorometry was used to investigate the relationship between phytoplankton photophysiology and water mass characteristics, micronutrient availability, and composition. Particulate organic matter proxies for phytoplankton biomass (chlorophyll a, particulate organic carbon and nitrogen, and biogenic silica) were all elevated in the photic zone during spring and summer. Biogenic silica concentrations were an order of magnitude higher in summer relative to spring, reflecting a shift in composition from Phaoecystis antarctica to diatoms. Quantum yields of PS II (Fv/Fm) were generally higher in spring relative to summer, coincident with weaker vertical and horizontal gradients in hydrographic properties. Reduced Fv/Fm values (
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::eb7d8bf75012a437e58ac153d318606f https://doi.org/10.1016/j.dsr.2013.05.002 Zobrazit plný text záznamu Full Text from ScienceDirect