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  • 1
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    Mussel beds are biological power stations on intertidal flats (2017)
    Elsevier
    In:  Estuarine, Coastal and Shelf Science, 191 . pp. 21-27.
    Details
    Publication Date: 2020-02-06
    Description: Highlights: • Mussel beds increase benthic microalgae biomass and productivity on intertidal flats. • Ecosystem engineers facilitate coastal production. • Biological control is important for the functioning of sedimentary systems. Abstract: Intertidal flats are highly productive areas that support large numbers of invertebrates, fish, and birds. Benthic diatoms are essential for the function of tidal flats. They fuel the benthic food web by forming a thin photosynthesizing compartment in the top-layer of the sediment that stretches over the vast sediment flats during low tide. However, the abundance and function of the diatom film is not homogenously distributed. Recently, we have realized the importance of bivalve reefs for structuring intertidal ecosystems; by creating structures on the intertidal flats they provide habitat, reduce hydrodynamic stress and modify the surrounding sediment conditions, which promote the abundance of associated organisms. Accordingly, field studies show that high chlorophyll a concentration in the sediment co-vary with the presence of mussel beds. Here we present conclusive evidence by a manipulative experiment that mussels increase the local biomass of benthic microalgae; and relate this to increasing biomass of microalgae as well as productivity of the biofilm across a nearby mussel bed. Our results show that the ecosystem engineering properties of mussel beds transform them into hot spots for primary production on tidal flats, highlighting the importance of biological control of sedimentary systems.
    Type: Article , PeerReviewed
    Format: text
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    DOI: 10.1016/j.ecss.2017.04.003
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 2
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    Global distributions of Phaeocystis sp. abundance and biomass - Gridded data product (NetCDF) - Contribution to the MAREDAT World Ocean Atlas of Plankton Functional Types (2012)
    PANGAEA
    Details
    Publication Date: 2023-03-27
    Description: The planktonic haptophyte Phaeocystis has been suggested to play a fundamental role in the global biogeochemical cycling of carbon and sulphur, but little is known about its global biomass distribution. We have collected global microscopy data of the genus Phaeocystis and converted abundance data to carbon biomass using species-specific carbon conversion factors. Microscopic counts of single-celled and colonial Phaeocystis were obtained both through the mining of online databases and by accepting direct submissions (both published and unpublished) from Phaeocystis specialists. We recorded abundance data from a total of 1595 depth-resolved stations sampled between 1955-2009. The quality-controlled dataset includes 5057 counts of individual Phaeocystis cells resolved to species level and information regarding life-stages from 3526 samples. 83% of stations were located in the Northern Hemisphere while 17% were located in the Southern Hemisphere. Most data were located in the latitude range of 50-70° N. While the seasonal distribution of Northern Hemisphere data was well-balanced, Southern Hemisphere data was biased towards summer months. Mean species- and form-specific cell diameters were determined from previously published studies. Cell diameters were used to calculate the cellular biovolume of Phaeocystis cells, assuming spherical geometry. Cell biomass was calculated using a carbon conversion factor for Prymnesiophytes (Menden-Deuer and Lessard, 2000). For colonies, the number of cells per colony was derived from the colony volume. Cell numbers were then converted to carbon concentrations. An estimation of colonial mucus carbon was included a posteriori, assuming a mean colony size for each species. Carbon content per cell ranged from 9 pg (single-celled Phaeocystis antarctica) to 29 pg (colonial Phaeocystis globosa). Non-zero Phaeocystis cell biomasses (without mucus carbon) range from 2.9 - 10?5 µg l-1 to 5.4 - 103 µg l-1, with a mean of 45.7 µg l-1 and a median of 3.0 µg l-1. Highest biomasses occur in the Southern Ocean below 70° S (up to 783.9 µg l-1), and in the North Atlantic around 50° N (up to 5.4 - 103 µg l-1).
    Keywords: MAREMIP; MARine Ecosystem Model Intercomparison Project
    Type: Dataset
    Format: application/zip, 3.6 MBytes
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    DATA PANGAEA
  • 3
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    Global distributions of diatoms abundance, biovolume and biomass - Gridded data product (NetCDF) - Contribution to the MAREDAT World Ocean Atlas of Plankton Functional Types (2012)
    PANGAEA
    Details
    Publication Date: 2023-07-05
    Description: This study is a first effort to compile the largest possible body of data available from different plankton databases as well as from individual published or unpublished datasets regarding diatom distribution in the world ocean. The data obtained originate from time series studies as well as spatial studies. This effort is supported by the Marine Ecosystem Data (MAREDAT) project, which aims at building consistent data sets for the main PFTs (Plankton Functional Types) in order to help validate biogeochemical ocean models by using converted C biomass from abundance data. Diatom abundance data were obtained from various research programs with the associated geolocation and date of collection, as well as with a taxonomic information ranging from group down to species. Minimum, maximum and average cell size information were mined from the literature for each taxonomic entry, and all abundance data were subsequently converted to biovolume and C biomass using the same methodology.
    Keywords: MAREMIP; MARine Ecosystem Model Intercomparison Project
    Type: Dataset
    Format: application/zip, 30.6 MBytes
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    DATA PANGAEA
  • 4
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    Algal pigment concentrations in meltponds and leads during the Arctic MOSAiC-expedition (Leg 4 and 5) (2023)
    PANGAEA
    Details
    Publication Date: 2023-11-15
    Description: Algal pigment concentrations were retrieved from meltponds and leads, during Leg 4 and 5 of the MOSAiC expedition (Multidisciplinary drifting Observatory for the Study of Arctic Climate) in 2020. The summer increase in meltpond area and open lead water in the Arctic associated with increased light availability is of specific significance for biological production within the Arctic system (Smith et al. 2023). Over a period of 3.5 months, 46 samples have been collected and analysed. After extraction in 90 % acetone, samples were analysed using high-performance liquid chromatography (HPLC) on a Waters system. Algal pigments contain a multiple set of information. Firstly, pigment concentrations can show the presence of algal biomass in the various water masses sampled. Secondly, marker pigments can reveal seasonal and temporal dynamics in algal community structure, by discerning specific algal classes like diatoms, cryptophytes, haptophytes and chlorophytes that have specific roles in biogeochemical cycles. Thirdly, certain pigments are indicative of the (photo)-physiological state of micro-algae and fourth, degradation products of the main chlorophyll a pigment further give an indication about senescence and grazing in the various habitats.
    Keywords: 19'-Hexanoyloxy-4-ketofucoxanthin; 19-Butanoyloxyfucoxanthin; 19-Hexanoyloxyfucoxanthin; Alloxanthin; alpha-Carotene; Arctic; Arctic Ocean; beta-Carotene; BUCKET; Bucket water sampling; Chlorophyll a, total; Chlorophyll b; Chlorophyll c1+c2; Chlorophyll c3; Comment; community composition; DATE/TIME; DEPTH, water; Diadinoxanthin; Diatoxanthin; Dinoxanthin; Echinenone; Event label; Fucoxanthin; Gear; Gyroxanthin diester; Hand pump; High Performance Liquid Chromatography (HPLC); HP; LATITUDE; leads; LONGITUDE; Lutein; Lycopene; Microalgae; Mosaic; MOSAiC; MOSAiC20192020; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Neoxanthin; Peridinin; Pheophorbides; pigments; Polarstern; ponds; Prasinoxanthin; PS122/4; PS122/4_44-118; PS122/4_47-144; PS122/5; PS122/5_59-200; PS122/5_59-202; PS122/5_59-203; PS122/5_59-207; PS122/5_59-208; PS122/5_59-209; PS122/5_59-210; PS122/5_59-211; PS122/5_59-212; PS122/5_59-213; PS122/5_59-291; PS122/5_59-343; PS122/5_59-344; PS122/5_59-391; PS122/5_59-393; PS122/5_60-130; PS122/5_60-202; PS122/5_60-280; PS122/5_60-64; PS122/5_61-205; PS122/5_61-273; PS122/5_61-278; PS122/5_62-117; PS122/5_62-33; PS122/5_62-40; PS122/5_62-92; PS122/5_63-82; PS122/5_63-84; Sample code/label; Violaxanthin; Water sample; WS; Zeaxanthin
    Type: Dataset
    Format: text/tab-separated-values, 1242 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Algal pigment concentrations in the ocean during the Arctic MOSAiC-expedition (2023)
    PANGAEA
    Details
    Publication Date: 2024-03-02
    Description: Algal pigment concentrations were retrieved from ocean samples, during the whole MOSAiC expedition (Multidisciplinary drifting Observatory for the Study of Arctic Climate) in 2019 to 2020. During MOSAiC, RV Polarstern anchored into an ice floe to gain new insights into Arctic climate over a full annual cycle. Ocean data were collected starting with the onset of the study, at 85 degrees north and 137 degrees east, following the drift towards the Fram Strait, and returning to the North Pole in the last leg of the expedition. Ocean samples were collected with a CTD, either from the ship, or from the ice floe in Ocean City (Rabe et al. 2022). Altogether 216 samples have been collected and analysed. After extraction in 90 % acetone, samples were analysed using high-performance liquid chromatography (HPLC) on a Waters system. Algal pigments contain a multiple set of information. Firstly, pigment concentrations can show the presence of algal biomass in the various water masses sampled. Secondly, marker pigments can reveal seasonal and temporal dynamics in algal community structure, by discerning specific algal classes like diatoms, cryptophytes, haptophytes and chlorophytes that have specific roles in biogeochemical cycles. Thirdly, certain pigments are indicative of the (photo)-physiological state of micro-algae and fourth, degradation products of the main chlorophyll a pigment further give an indication about senescence and grazing in the various habitats.
    Keywords: 19'-Hexanoyloxy-4-ketofucoxanthin; 19-Butanoyloxyfucoxanthin; 19-Hexanoyloxyfucoxanthin; Alloxanthin; alpha-Carotene; Arctic Ocean; beta-Carotene; Chlorophyll a, total; Chlorophyll b; Chlorophyll c1+c2; Chlorophyll c3; Comment; CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; Diadinoxanthin; Diatoxanthin; Dinoxanthin; Echinenone; Event label; Fucoxanthin; Gear; Gyroxanthin diester; High Performance Liquid Chromatography (HPLC); LATITUDE; LONGITUDE; Lutein; Lycopene; MOSAiC; MOSAiC20192020; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Neoxanthin; Peridinin; Pheophorbides; Polarstern; Prasinoxanthin; PS122/1; PS122/1_10-44; PS122/1_6-58; PS122/1_7-49; PS122/1_8-46; PS122/1_9-50; PS122/2; PS122/2_17-41; PS122/2_18-34; PS122/2_19-56; PS122/2_20-46; PS122/2_21-65; PS122/2_22-47; PS122/2_23-63; PS122/2_25-54; PS122/3; PS122/3_30-40; PS122/3_30-53; PS122/3_31-39; PS122/3_31-59; PS122/3_32-75; PS122/3_33-69; PS122/3_34-77; PS122/3_34-97; PS122/3_35-63; PS122/3_36-81; PS122/3_37-45; PS122/3_38-54; PS122/3_39-51; PS122/3_40-36; PS122/4; PS122/4_44-184; PS122/4_44-67; PS122/4_45-31; PS122/4_46-60; PS122/4_47-60; PS122/4_48-62; PS122/4_49-10; PS122/4_49-25; PS122/4_50-21; PS122/5; PS122/5_59-274; PS122/5_59-306; PS122/5_59-62; PS122/5_59-72; PS122/5_60-69; PS122/5_61-161; PS122/5_63-53; PUMP; Sample code/label; Violaxanthin; Water pump; Zeaxanthin
    Type: Dataset
    Format: text/tab-separated-values, 5633 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Annual patterns in algal pigment distribution in Arctic second year ice during the MOSAiC expedition 2019/2020 (2023)
    PANGAEA
    Details
    Publication Date: 2024-04-26
    Description: Algal pigment concentrations were retrieved from samples from second-year (SYI) ice, during the whole MOSAiC expedition (Multidisciplinary drifting Observatory for the Study of Arctic Climate) in 2019 to 2020. During MOSAiC, RV Polarstern anchored into an ice floe to gain new insights into Arctic climate over a full annual cycle. Sea ice data were collected starting with the onset of the study, at 85 degrees north and 137 degrees east, following the drift towards the Fram Strait, and returning into the marginal ice zone during the 4th leg of the expedition. Ice cores were collected at the various coring sites together with teams ICE and BGC (Nicolaus et al. 2022), to study the development of pigment patterns over time, on 3 specific ice-locations. Altogether, 277 samples have been collected and analysed. Ice cores were sliced in sections of 5-10 cm before analyses. Each of the sections was melted at room temperature after additions of filtered ambient seawater, under dark conditions. After extraction in 90 % acetone, samples were analysed using high-performance liquid chromatography (HPLC) on a Waters system (AWI). Algal pigments contain a multiple set of information. Firstly, pigment concentrations can show the presence of algal biomass in the various domains sampled. Secondly, marker pigments can reveal seasonal and temporal dynamics in algal community structure, by discerning specific algal classes like diatoms, cryptophytes, haptophytes and chlorophytes that have specific roles in biogeochemical cycles. Thirdly, certain pigments are indicative of the (photo)-physiological state of micro-algae and fourth, degradation products of the main chlorophyll a pigment further give an indication about senescence and grazing in the various habitats.
    Keywords: 19'-Hexanoyloxy-4-ketofucoxanthin; 19-Butanoyloxyfucoxanthin; 19-Hexanoyloxyfucoxanthin; Alloxanthin; alpha-Carotene; Arctic Ocean; Astaxanthin; beta-Carotene; Chlorophyll a, total; Chlorophyll b; Chlorophyll c1+c2; Chlorophyll c3; Comment; DATE/TIME; Depth, description; DEPTH, ice/snow; Diadinoxanthin; Diatoxanthin; Dinoxanthin; Echinenone; Event label; Fucoxanthin; Gyroxanthin diester; High Performance Liquid Chromatography (HPLC); IC; Ice corer; LATITUDE; LONGITUDE; Lutein; Lycopene; MOSAiC; MOSAiC20192020; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Neoxanthin; Peridinin; Pheophorbides; Pheophytin a; Polarstern; Prasinoxanthin; PS122/1; PS122/1_10-16; PS122/1_5-78; PS122/1_6-36; PS122/1_7-9; PS122/1_9-11; PS122/2; PS122/2_20-5; PS122/2_22-7; PS122/2_24-34; PS122/2_25-15; PS122/3; PS122/3_33-18; PS122/3_36-4; PS122/3_38-16; PS122/3_39-18; PS122/4; PS122/4_45-29; PS122/4_46-20; PS122/4_47-18; PS122/4_48-25; Sample code/label; Violaxanthin; Zeaxanthin
    Type: Dataset
    Format: text/tab-separated-values, 7755 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Annual patterns in algal pigment distribution in Arctic first year ice during the MOSAiC expedition 2019/2020 (2024)
    PANGAEA
    Details
    Publication Date: 2024-04-26
    Description: Algal pigment concentrations were retrieved from samples from first-year (FYI) ice, during the whole MOSAiC expedition (Multidisciplinary drifting Observatory for the Study of Arctic Climate) in 2019 to 2020. During MOSAiC, RV Polarstern anchored into an ice floe to gain new insights into Arctic climate over a full annual cycle. Sea ice data were collected starting with the onset of the study, at 85 degrees north and 137 degrees east, following the drift towards the Fram Strait, and returning to the North Pole in the last leg of the expedition. Ice cores were collected at the various coring sites together with teams ICE and BGC (Nicolaus et al. 2022), to study the development of pigment patterns over time, on 3 specific ice-locations. Altogether, 292 samples have been collected and analysed. Ice cores were sliced in sections of 5-10 cm before analyses. Each of the sections was melted at room temperature after additions of filtered ambient seawater, under dark conditions. After extraction in 90 % acetone, samples were analysed using high-performance liquid chromatography (HPLC) on a Waters system (AWI). Algal pigments contain a multiple set of information. Firstly, pigment concentrations can show the presence of algal biomass in the various domains sampled. Secondly, marker pigments can reveal seasonal and temporal dynamics in algal community structure, by discerning specific algal classes like diatoms, cryptophytes, haptophytes and chlorophytes that have specific roles in biogeochemical cycles. Thirdly, certain pigments are indicative of the (photo)-physiological state of micro-algae and fourth, degradation products of the main chlorophyll a pigment further give an indication about senescence and grazing in the various habitats.
    Keywords: 19'-Hexanoyloxy-4-ketofucoxanthin; 19-Butanoyloxyfucoxanthin; 19-Hexanoyloxyfucoxanthin; Alloxanthin; alpha-Carotene; Arctic Ocean; Astaxanthin; beta-Carotene; Chlorophyll a, total; Chlorophyll b; Chlorophyll c1+c2; Chlorophyll c3; DATE/TIME; Depth, description; DEPTH, ice/snow; Diadinoxanthin; Diatoxanthin; Dinoxanthin; Echinenone; Event label; Fucoxanthin; Gyroxanthin diester; High Performance Liquid Chromatography (HPLC); IC; Ice corer; LATITUDE; LONGITUDE; Lutein; Lycopene; MOSAiC; MOSAiC20192020; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Neoxanthin; Peridinin; Pheophorbides; Pheophytin a; Polarstern; Prasinoxanthin; PS122/1; PS122/1_10-16; PS122/1_5-3; PS122/1_6-34; PS122/1_7-6; PS122/1_8-2; PS122/1_9-6; PS122/2; PS122/2_17-3; PS122/2_19-7; PS122/2_21-13; PS122/2_23-3; PS122/2_24-8; PS122/3; PS122/3_35-11; PS122/3_36-21; PS122/3_38-24; PS122/3_39-7; PS122/4; PS122/4_44-134; PS122/4_44-42; PS122/4_46-18; PS122/4_47-16; PS122/4_48-23; PS122/4_49-34; PS122/5; PS122/5_60-3; PS122/5_61-6; Sample code/label; Violaxanthin; Zeaxanthin
    Type: Dataset
    Format: text/tab-separated-values, 8035 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
    facet.materialart.
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    Annual patterns in algal pigment distribution in Arctic second year ice during the MOSAiC expedition 2019/2020 (2024)
    PANGAEA
    Details
    Publication Date: 2024-04-26
    Description: Algal pigment concentrations were retrieved from samples from second-year (SYI) ice, during the whole MOSAiC expedition (Multidisciplinary drifting Observatory for the Study of Arctic Climate) in 2019 to 2020. During MOSAiC, RV Polarstern anchored into an ice floe to gain new insights into Arctic climate over a full annual cycle. Sea ice data were collected starting with the onset of the study, at 85 degrees north and 137 degrees east, following the drift towards the Fram Strait, and returning into the marginal ice zone during the 4th leg of the expedition. Ice cores were collected at the various coring sites together with teams ICE and BGC (Nicolaus et al. 2022), to study the development of pigment patterns over time, on 3 specific ice-locations. Altogether, 277 samples have been collected and analysed. Ice cores were sliced in sections of 5-10 cm before analyses. Each of the sections was melted at room temperature after additions of filtered ambient seawater, under dark conditions. After extraction in 90 % acetone, samples were analysed using high-performance liquid chromatography (HPLC) on a Waters system (AWI). Algal pigments contain a multiple set of information. Firstly, pigment concentrations can show the presence of algal biomass in the various domains sampled. Secondly, marker pigments can reveal seasonal and temporal dynamics in algal community structure, by discerning specific algal classes like diatoms, cryptophytes, haptophytes and chlorophytes that have specific roles in biogeochemical cycles. Thirdly, certain pigments are indicative of the (photo)-physiological state of micro-algae and fourth, degradation products of the main chlorophyll a pigment further give an indication about senescence and grazing in the various habitats.
    Keywords: 19'-Hexanoyloxy-4-ketofucoxanthin; 19-Butanoyloxyfucoxanthin; 19-Hexanoyloxyfucoxanthin; Alloxanthin; alpha-Carotene; Arctic Ocean; Astaxanthin; beta-Carotene; Chlorophyll a, total; Chlorophyll b; Chlorophyll c1+c2; Chlorophyll c3; Comment; DATE/TIME; Depth, description; DEPTH, ice/snow; Diadinoxanthin; Diatoxanthin; Dinoxanthin; Echinenone; Event label; Fucoxanthin; Gyroxanthin diester; High Performance Liquid Chromatography (HPLC); IC; Ice corer; LATITUDE; LONGITUDE; Lutein; Lycopene; MOSAiC; MOSAiC20192020; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Neoxanthin; Peridinin; Pheophorbides; Pheophytin a; Polarstern; Prasinoxanthin; PS122/1; PS122/1_10-19; PS122/1_5-78; PS122/1_6-36; PS122/1_7-9; PS122/1_9-11; PS122/2; PS122/2_20-5; PS122/2_22-7; PS122/2_24-34; PS122/2_25-15; PS122/3; PS122/3_33-18; PS122/3_36-4; PS122/3_38-16; PS122/3_39-18; PS122/4; PS122/4_45-29; PS122/4_46-20; PS122/4_47-18; PS122/4_48-25; Sample code/label; Violaxanthin; Zeaxanthin
    Type: Dataset
    Format: text/tab-separated-values, 7811 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
    facet.materialart.
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    Annual patterns in algal pigment distribution in Arctic first year ice during the MOSAiC expedition 2019/2020 (2023)
    PANGAEA
    Details
    Publication Date: 2024-04-26
    Description: Algal pigment concentrations were retrieved from samples from first-year (FYI) ice, during the whole MOSAiC expedition (Multidisciplinary drifting Observatory for the Study of Arctic Climate) in 2019 to 2020. During MOSAiC, RV Polarstern anchored into an ice floe to gain new insights into Arctic climate over a full annual cycle. Sea ice data were collected starting with the onset of the study, at 85 degrees north and 137 degrees east, following the drift towards the Fram Strait, and returning to the North Pole in the last leg of the expedition. Ice cores were collected at the various coring sites together with teams ICE and BGC (Nicolaus et al. 2022), to study the development of pigment patterns over time, on 3 specific ice-locations. Altogether, 292 samples have been collected and analysed. Ice cores were sliced in sections of 5-10 cm before analyses. Each of the sections was melted at room temperature after additions of filtered ambient seawater, under dark conditions. After extraction in 90 % acetone, samples were analysed using high-performance liquid chromatography (HPLC) on a Waters system (AWI). Algal pigments contain a multiple set of information. Firstly, pigment concentrations can show the presence of algal biomass in the various domains sampled. Secondly, marker pigments can reveal seasonal and temporal dynamics in algal community structure, by discerning specific algal classes like diatoms, cryptophytes, haptophytes and chlorophytes that have specific roles in biogeochemical cycles. Thirdly, certain pigments are indicative of the (photo)-physiological state of micro-algae and fourth, degradation products of the main chlorophyll a pigment further give an indication about senescence and grazing in the various habitats.
    Keywords: 19'-Hexanoyloxy-4-ketofucoxanthin; 19-Butanoyloxyfucoxanthin; 19-Hexanoyloxyfucoxanthin; Alloxanthin; alpha-Carotene; Arctic Ocean; Astaxanthin; beta-Carotene; Chlorophyll a, total; Chlorophyll b; Chlorophyll c1+c2; Chlorophyll c3; DATE/TIME; Depth, description; DEPTH, ice/snow; Diadinoxanthin; Diatoxanthin; Dinoxanthin; Echinenone; Event label; Fucoxanthin; Gyroxanthin diester; High Performance Liquid Chromatography (HPLC); IC; Ice corer; LATITUDE; LONGITUDE; Lutein; Lycopene; MOSAiC; MOSAiC20192020; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Neoxanthin; Peridinin; Pheophorbides; Pheophytin a; Polarstern; Prasinoxanthin; PS122/1; PS122/1_10-19; PS122/1_5-3; PS122/1_6-34; PS122/1_7-6; PS122/1_8-2; PS122/1_9-6; PS122/2; PS122/2_17-3; PS122/2_19-7; PS122/2_21-13; PS122/2_23-3; PS122/2_24-8; PS122/3; PS122/3_35-11; PS122/3_36-21; PS122/3_38-24; PS122/3_39-7; PS122/4; PS122/4_44-134; PS122/4_44-42; PS122/4_46-18; PS122/4_47-16; PS122/4_48-23; PS122/4_49-34; PS122/5; PS122/5_60-3; PS122/5_61-6; Sample code/label; Violaxanthin; Zeaxanthin
    Type: Dataset
    Format: text/tab-separated-values, 8175 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    Phytoplankton and pigment patterns across frontal zones in the Atlantic sector of the Southern Ocean (2015)
    ELSEVIER SCIENCE BV
    In:  EPIC3Marine Chemistry, ELSEVIER SCIENCE BV, 177, pp. 510-517, ISSN: 0304-4203
    Details
    Publication Date: 2016-06-09
    Description: Phytoplankton distribution and concentrations of macronutrients and iron were studied in the Polar Frontal Zone (PFZ) and the eastern Weddell Gyre of the Southern Ocean, during austral autumn. HPLC analysis of algal pigments was combined with microscopy observations to assess algal distribution. Patterns of algal distribution were dictated by the frontal systems. Travelling from north to south, four distinctively different algal communities were observed, the composition of which could be explained by variations in nutrients, light climate and grazing pressure. North of the PFZ, low silicate levels (〈3 μM) were limiting diatom growth, and the algal community was dominated by prasinophytes. Silicate concentrations increased over the PFZ, which coincided with the dominance of diatoms. South of the PFZ, the open waters of the Weddell Gyre are characterised as a high nutrient low-chlorophyll area. Low iron concentrations (〈0.4 nM on average) supported an algal community that was dominated by smaller size algae (〈20 μm). Deep wind-mixed layers (〉100 m depth) together with low incident irradiance in autumn were likely limiting algal growth. At the Marginal Ice Zone (MIZ), the phytoplankton community consisted mainly of low numbers of flagellates (Chlorophyceae and haptophytes) and high numbers of microzooplankton, indicating phytoplankton control by grazing. The phytoplankton distribution patterns presented here and the relation with potential growth-controlling factors provides more insight in the mechanisms that control carbon fluxes from the atmosphere into the ocean interior.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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