Biogeochemical measurements at the Antarctic Peninsula ...

• Main Authors: Serret, Pablo, Fernández, Emilio, Anadón, Ricardo, Varela, Manuel
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2001
• Subjects: CTD/Rosette; Fruela95; Hespérides; Joint Global Ocean Flux Study JGOFS; Antarc*; Antarctic; Antarctic Peninsula; Antarctica; Bransfield Strait
• Online Access: https://dx.doi.org/10.1594/pangaea.758047; https://doi.pangaea.de/10.1594/PANGAEA.758047

Size-fractionated chlorophyll a and photosynthetic carbon incorporation, microbial oxygen production and respiration and particulate vertical flux were measured in January 1996 at three regions, characterized by distinct hydrographic fields and planktonic communities, of the Antarctic Peninsula: (1) a diatom-Phaeocystis sp., dominated community associated with the relatively stratified waters of the Gerlache Strait, (2) a nanoplankton-Cryptomonas sp. dominated assemblage at the Gerlache-Bransfield confluence; and (3) a nano- and picoplankton community in mixed waters of the Bransfield Strait. Despite the marked differences in both community structure and total phytoplankton biomass and primary production, and against predictions from models about trophic control of C export, the lowest respiration rates were measured at Bransfield (pico- and nanoplankton), and no difference was observed between the Gerlache (large diatoms) and Bransfield stations in relative vertical particle flux (6.4 vs. 5.1 % of suspended ... : Supplement to: Serret, Pablo; Fernández, Emilio; Anadón, Ricardo; Varela, Manuel (2001): Trophic control of biogenic carbon export in Bransfield and Gerlache Straits, Antarctica. Journal of Plankton Research, 23(12), 1345-1360 ...