Unknown
PANGAEA
In:
Supplement to: Mundy, Christopher John; Gosselin, Michel; Ehn, Jens K; Belzile, Claude; Poulin, Michel; Alou, Eva; Roy, Suzanne; Hop, Haakon; Lessard, Sylvie; Papakyriakou, Tim N; Barber, David G; Stewart, Jeremy (2011): Characteristics of two distinct high-light acclimated algal communities during advanced stages of sea ice melt. Polar Biology, 34(12), 1869-1886, https://doi.org/10.1007/s00300-011-0998-x
Publication Date:
2023-12-13
Description:
Influence of methanogenic populations in Holocene lacustrine sediments revealed by clone libraries and fatty acid biogeochemistry.Biological characteristics of ice-associated algal communities were studied in Darnley Bay (western Canadian Arctic) during a 2-week period in July 2008 when the landfast ice cover had reached an advanced stage of melt. We found two distinct and separate algal communities: (1) an interior ice community confined to brine channel networks beneath white ice covers; and (2) an ice melt water community in the brackish waters of both surface melt ponds and the layer immediately below the ice cover. Both communities reached maximum chlorophyll a concentrations of about 2.5 mg/m**3, but with diatoms dominating the interior ice while flagellates dominated the melt water community. The microflora of each community was diverse, containing both unique and shared algal species, the latter suggesting an initial seeding of the ice melt water by the bottom ice community. Absorption characteristics of the algae indicated the presence of mycosporine-like amino acids (MAAs) and carotenoid pigments as a photoprotective strategy against being confined to high-light near-surface layers. Although likely not contributing substantially to total annual primary production, these ice-associated communities may play an important ecological role in the Arctic marine ecosystem, supplying an accessible and stable food source to higher trophic levels during the period of ice melt.
Keywords:
Amphidinium spp.; Amundsen_Gulf08; Amundsen Gulf, Canada; Arcocellulus cornucervis; Attheya cf. septentrionalis; Attheya septentrionalis; Bicosta spp.; Bodo cf. curvifilus; Bodo spp.; Calliacantha longicaudata; Calliacantha natans; Chaetoceros cf. convolutus; Chaetoceros cf. minimus; Chaetoceros neogracile; Chaetoceros similis; Chaetoceros simplex; Chaetoceros socialis; Chaetoceros sp.; Chaetoceros spp.; Chaetoceros tenuissimus; Chaetoceros vistulae; Chaetoceros wighamii; Chattonella spp.; Chlorophyceae; Chlorophyceae indeterminata; Choanoflagellatea indeterminata; Choanoflagellida; Chrysochromulina spp.; Chrysophyceae; Chrysophyceae cysts; Chrysophyceae indeterminata; Ciliates; Ciliates indeterminata; Cryptophyceae; Cryptophyceae indeterminata; Cylindrotheca closterium; DATE/TIME; Diatoms; Diatoms, pennales indeterminata; Dicrateria spp.; Dictyochophyceae; Dinobryon balticum; Dinobryon faculiferum; Dinobryon spp.; Dinoflagellate indeterminata; Dinoflagellates; Dolichomastix nummulifera; Ephemera planamembranacea; Eucampia groenlandica; Euglenophyceae; Euglenophyceae indeterminata; Flagellates, heterotrophic; Flagellates indeterminata; Fragilariopsis cylindrus; Fragilariopsis oceanica; Fragilariopsis spp.; Gymnodinium sp.; Gymnodinium spp.; Gyrodinium cf. resplendens; Gyrosigma concilians; Heterocapsa arctica; Heterocapsa cf. niei; Heterocapsa sp.; Indeterminable: unknown; International Polar Year (2007-2008); IPY; Leucocryptos marina; Location; Lohmanniella oviformis; Monosiga sp.; Navicula gelida; Navicula gelida var. radissonii; Navicula pagophila var. manitounukensis; Navicula pelagica; Navicula spp.; Navicula transitans; Navicula transitans var. derasa; Nitzschia frigida; Nitzschia promare; Nitzschia spp.; Notosolenus sp.; Number of species; Number of taxa; Parvicorbicula socialis; Pinnularia quadratarea var. minor; Plagioselmis prolonga var. nordica; Polarella glacialis; Polytoma spp.; Prasinophyceae; Prasinophyceae indeterminata; Protoperidinium bipes; Prymnesiophyceae; Prymnesiophyceae indeterminata; Pseudogomphonema arcticum; Pseudo-nitzschia cf. pseudodelicatissima; Pseudopedinella spp.; Pyramimonas disomata; Pyramimonas sp.; Pyramimonas spp.; Quadricilia rotundata; Raphidophyceae; Raphidophyceae indeterminata; Rhynchomonas nasuta; Sample comment; SEAICEC; Sea ice corer; Stauroneis radissonii; Strombidium spp.; Synedropsis hyperborea; Telonema sp.; Telonema subtile; Thalassiosira nordenskioeldii; Thalassiosira sp.; Thalassiosira spp.; Vanella cf. simplex
Type:
Dataset
Format:
text/tab-separated-values, 818 data points
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