Heme b concentrations determined in particulate material collected from 10 mesocosm (M1-10) situated in Gllmar Fjord in 2013 and from a control site in the Fjord waters (Fjord) ...

• Main Authors: Bellworthy, Jessica, Gledhill, Martha, Esposito, Mario, Achterberg, Eric Pieter
• Format: Dataset
• Language: English
• Published: PANGAEA 2017
• Subjects: Event label; DATE/TIME; Mesocosm label; Heme b; Mesocosm experiment; KOSMOS 2013; Biological Impacts of Ocean Acidification BIOACID; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.884277; https://doi.pangaea.de/10.1594/PANGAEA.884277

Concentrations of heme b were determined in a mesocosm experiment situated in Gullmar Fjord off Sweden. The mesocosm experiment lasted for ca. one hundred days and was characterised by the growth of a primary nutrient replete and a secondary nutrient deplete phytoplankton bloom. Heme b varied between 40 ± 10 pmol/l in the prebloom period up to a maximum of 700 ± 400 pmol/l just prior to the time of the primary chlorophyll a maximum. Thereafter, heme b concentrations decreased again to an average of 120 ± 60 pmol/l. When normalised to total particulate carbon, heme b was most abundant during the initiation of the nutrient replete spring bloom, when ratios reached 52 ± 24 µmol/mol; ten times higher than values observed both pre and post the primary bloom. Concentrations of heme b correlated with those of chlorophyll a. Nevertheless, differences were observed in the relative concentrations of the two parameters, with heme b concentrations increasing relative to chlorophyll a during the growth of the primary ... : Heme b (nmol L-1 seawater) determined in particles >0.7 µm size. Detection limt 0.009 ± 0.008 nmol L-1 seawater.Samples were collected using an integrated 5l Water Sampler (IWS; Hydro-Bios, Kiel, Germany), which enabled collection of integrated water sample for 0-18 meters depth. ...