Data Description

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Citation:
Fernández-Méndez, Mar; Wenzhöfer, Frank; Peeken, Ilka; Sørensen, Heidi L; Glud, Ronnie N; Hendricks, Stefan; Nicolaus, Marcel; Katlein, Christian; Nöthig, Eva-Maria; Bakker, Karel; Boetius, Antje (2014): Biogeochemical characterization of pennate diatom and Melosira arctica ice algal aggregates in the Central Arctic Ocean collected in summer 2011 and 2012. doi:10.1594/PANGAEA.832345,
Supplement to: Fernández-Méndez, Mar; Wenzhöfer, Frank; Peeken, Ilka; Sørensen, Heidi L; Glud, Ronnie N; Boetius, Antje; Vopel, Kay (2014): Composition, Buoyancy Regulation and Fate of Ice Algal Aggregates in the Central Arctic Ocean. PLoS ONE, 9(9), e107452, doi:10.1371/journal.pone.0107452
Abstract:
Sea-ice diatoms are known to accumulate in large aggregates in and under the sea ice including melt ponds. In the Arctic, they can contribute substantially to particle export when sinking from the ice. The role and regulation of microbial aggregation in the highly seasonal, nutrient- and light-limited Arctic sea-ice ecosystem is not yet well understood, and may vary in relation to the fate of the Arctic sea-ice cover. To elucidate the mechanism controlling the formation and export of algal aggregates from sea ice, we investigated samples taken in late summer 2011 and 2012, during two cruises to the Eurasian Basin of the Central Arctic Ocean. Dense, spherical aggregates composed mainly of pennate diatoms, and filamentous aggregates formed by Melosira arctica were found in different degradation stages, with carbon to Chlorophyll a ratios ranging from 110 to 66700, and carbon to nitrogen molar ratios of 8-35 and 9-40, respectively. Fresh sub-ice algal aggregate densities ranged between 1 and 17 aggregates/m**2, corresponding to a net primary production of 0.4-40 mg C/m**2/d, contributing 3-80% of total biomass and up to 94% of total production at a local scale. A key factor controlling buoyancy of the aggregates was light intensity, regulating photosynthetic oxygen production and flotation by gas bubbles trapped within the mucous matrix, even at low ambient nutrient concentrations. Our data was used to evaluate the factors regulating the distribution and importance of the Arctic algal aggregates as carbon source for pelagic and benthic communities.
Source data set:
Hendricks, Stefan; Nicolaus, Marcel; Schwegmann, Sandra (2012): Sea ice conditions during POLARSTERN cruise ARK-XXVII/3 (IceArc). Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research, Bremerhaven, doi:10.1594/PANGAEA.803221
Nicolaus, Marcel; Katlein, Christian; Maslanik, James A; Hendricks, Stefan (2012): Sea ice conditions during the POLARSTERN cruise ARK-XXVI/3 (TransArc) in 2011. Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research, Bremerhaven, doi:10.1594/PANGAEA.803312
Project(s):
Coverage:
Median Latitude: 84.804680 * Median Longitude: 76.731705 * South-bound Latitude: 81.884670 * West-bound Longitude: 31.109500 * North-bound Latitude: 88.021670 * East-bound Longitude: 131.128670
Date/Time Start: 2011-08-14T20:40:00 * Date/Time End: 2012-09-19T14:20:00
Minimum Elevation: -4621.1 m * Maximum Elevation: -3424.6 m
Event(s):
PS78/203-1 (Ice station #2) * * Latitude: 85.971000 * Longitude: 59.348500 * Date/Time: 2011-08-14T20:40:00 * Elevation: -3777.9 m * Location: Arctic Ocean * * Campaign: ARK-XXVI/3 (PS78 TransArc) * * Basis: Polarstern * * Device: Ice station (ICE) *
PS78/209-1 (Ice station #3) * * Latitude: 86.982500 * Longitude: 59.003330 * Date/Time: 2011-08-17T19:46:00 * Elevation: -4621.1 m * Location: Arctic Ocean * * Campaign: ARK-XXVI/3 (PS78 TransArc) * * Basis: Polarstern * * Device: Ice station (ICE) *
PS78/212-1 (Ice station #4) * * Latitude: 88.021670 * Longitude: 59.452500 * Date/Time: 2011-08-19T20:55:00 * Elevation: -4259.6 m * Location: Arctic Ocean * * Campaign: ARK-XXVI/3 (PS78 TransArc) * * Basis: Polarstern * * Device: Ice station (ICE) *
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Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event label *Event
2Optional event label *Event 2
3Gear *Gear
4Date/Time of event *Date/Time
5Latitude of event *Latitude
6Longitude of event *Longitude
7Habitat *HabitatFernández-Méndez, Mar *
8Melt pond depth *Melt pond depthmHendricks, Stefan *source data sets: Hendricks et al., 2012; Nicolaus et al., 2012
9Melt pond coverage on sea ice *Melt pond cov%Hendricks, Stefan *source data sets: Hendricks et al., 2012; Nicolaus et al., 2012
10Comment *CommentFernández-Méndez, Mar *about melt pond
11Type *TypeFernández-Méndez, Mar *of algae aggregates
12Sample ID *Sample IDFernández-Méndez, Mar *of algae aggregates
13Description *DescriptionFernández-Méndez, Mar *of algae aggregates floating behavier
14Color description *Color descFernández-Méndez, Mar *of algae aggregates
15Algae aggregate, size *Algae agg sizemmFernández-Méndez, Mar *
16Standard deviation *Std dev±Fernández-Méndez, Mar *of algae aggregates, size
17Salinity *SalFernández-Méndez, Mar *of water, minimum
18Salinity *SalFernández-Méndez, Mar *of water, maximum
19Salinity *SalFernández-Méndez, Mar *of aggregates
20Temperature, water *Temp°CFernández-Méndez, Mar *
21Irradiance *EµE/m2/sFernández-Méndez, Mar *
22Taxon/taxa *TaxaFernández-Méndez, Mar *diatoms
23Life stage *Life stageFernández-Méndez, Mar *of diatoms
24Taxon/taxa *TaxaFernández-Méndez, Mar *of observed grazer
25Carbon, organic, particulate *POCmg/lNöthig, Eva-Maria *of homogene algal slurry
26Partical organic nitrogen normalized to particulate organic carbon *PON-POCµmol/mgNöthig, Eva-Maria *Normalized to particulate organic carbon *of homogene algal slurry
27Carbon/Nitrogen ratio *C/NFernández-Méndez, Mar *of homogene algal slurry
28Chlorophyll a normalized to particulate organic carbon *Chl a-POCµg/mgPeeken, Ilka *Normalized to particulate organic carbon *of homogene algal slurry
29Carbon/Chlorophyll a ratio *C/Chl aPeeken, Ilka *of homogene algal slurry
30Chlorophyll a/chloroplastic pigment equivalents ratio *Chl a/CPE%Peeken, Ilka *of homogene algal slurry
31Carbon, organic, dissolved normalized to particulate organic carbon *DOC-POCµmol/mgFernández-Méndez, Mar *Normalized to particulate organic carbon *of homogene algal slurry
32Transparent exopolymer particles normalized to particulate organic carbon *TEP-POCµg/mgFernández-Méndez, Mar *Normalized to particulate organic carbon *of TEP C, of homogene algal slurry
33Standard deviation *Std dev±Fernández-Méndez, Mar *of TEP C, of homogene algal slurry
34Replicates *Repl#Fernández-Méndez, Mar *of homogene algal slurry
35Transparent exopolymer particles/particulate organic carbon ratio *TEP/POCFernández-Méndez, Mar *of homogene algal slurry
36Standard deviation *Std dev±Fernández-Méndez, Mar *of TEP/POC, of homogene algal slurry
37Number of measurements *n#Fernández-Méndez, Mar *of TEP/POC, of homogene algal slurry
38Net primary production of carbon normalized to particulate organic carbon *NPP C-POCmg/mg/dayFernández-Méndez, Mar *Normalized to particulate organic carbon *of homogene algal slurry
39Method comment *MethodFernández-Méndez, Mar *of homogene algal slurry
40Prokaryotes, abundance as single cells normalized to particulate organic carbon *Prok cell ab-POC109#/mgFernández-Méndez, Mar *Normalized to particulate organic carbon *of homogene algal slurry
41Bacterial organic carbon normalized to particulate organic carbon *BOC-POC%Fernández-Méndez, Mar *Normalized to particulate organic carbon *of homogene algal slurry
42Nitrate *NO3µmol/lBakker, Karel *in the water surrounding the aggregates
43Phosphate *PO4µmol/lBakker, Karel *in the water surrounding the aggregates
44Silicate *Si(OH)4µmol/lBakker, Karel *in the water surrounding the aggregates
License:
Size:
388 data points

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