Unknown
PANGAEA
In:
Supplement to: Sukhanova, Irina N; Flint, Mikhail V; Whitledge, Terry E; Stockwell, Dean A; Rho, T K (2006): Mass development of the planktonic diatom Proboscia alata over the Bering Sea shelf in the summer season. Translated from Okeanologiya, 2006, 46(2), 220-237, Oceanology, 46(2), 200-216, https://doi.org/10.1134/S000143700602007X
Publication Date:
2023-05-12
Description:
During most of the vegetation season from late May to early September large-sized diatom alga Proboscia alata forms local patches with high abundances and biomasses in different oceanographic domains of the eastern Bering Sea shelf. For 0-25 m layer average abundance and biomass of species in these patches are 700000 cells/l and 5 g/m**3 (wet weight), while corresponding estimates for the layer of maximal species concentrations are 40000000 cells/l and 38 g/m**3 (wet weight) or 1.6 g C/m**3. These levels of abundance and biomass are typical for the spring diatom bloom in the region. Outbursts of P. alata mass development are important for the carbon cycle in the pelagic zone of the shelf area in the summer season. The paradox of P. alata summertime blooms over the middle shelf lies in their occurrences against the background of the sharp seasonal pycnocline and deficiency in nutrients in the upper mixed layer. Duration of the outbursts in P. alata development is about two weeks and size of patches with high abundances can be as large as 200 km across. Degradation of the P. alata summertime outbursts may occur during 4-5 days. Rapid sinking of cells through the seasonal pycnocline results in intense transport of organic matter to bottom sediments. One of possible factors responsible for rapid degradation of the blooms is affect on the population by ectoparasitic flagellates. At terminal stages of the P. alata blooms percentage of infected cells can reach 70-99%.
Keywords:
AH-2001-B2; AH-2001-B3; AH-2001-B3A; AH-2001-B4; AH-2001-B5; Archive of Ocean Data; ARCOD; Bottle, Niskin; East Bering Sea; NIS
Type:
Dataset
Format:
application/zip, 3 datasets
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