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Preliminary investigation of Okhotsk Sea ice algae; taxonomic composition and photosynthetic activity
Citation
McMinn, A and Hattori, H and Hirawake, T and Iwamoto, A, Preliminary investigation of Okhotsk Sea ice algae; taxonomic composition and photosynthetic activity, Polar Biology, 31, (8) pp. 1011-1015. ISSN 0722-4060 (2008) [Refereed Article]
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Copyright Statement
The original publication is available at www.springerlink.com
Official URL: http://www.springerlink.com
DOI: doi:10.1007/s00300-008-0433-0
Abstract
Okhotsk Sea pack ice from Shiretoko in
northern Hokkaido, sampled in March 2007, contained
microalgal communities dominated by the centric diatoms
Thalassiosira nordenskioeldi and T. punctigera. Domination
by this genus is very unusual in sea ice. Communities
from nearby fast ice at Saroma-ko lagoon were dominated
by Detonula conferavea and Odontella aurita. Average
microalgal biomass of the Okhotsk Sea pack ice (surface
and bottom) was 1.59 ± 1.09 lg chla l-1 and for fast ice
(bottom only) at nearby Saroma-ko lagoon, 16.5 ± 3.2 lg
l-1 (=31.1 ± 5.0 mg chla m-2). Maximum quantum yield
of the Shiretoko pack ice algal communities was
0.618 ± 0.056 with species-specific data ranging between
0.211 and 0.653. These community values are amongst the
highest recorded for sea ice algae. Rapid light curves
(RLC) on individual cells indicated maximum relative
electron transfer rates (relETR) between 20.8 and 60.6,
photosynthetic efficiency values (a) between 0.31 and 0.93
and onset of saturation values (Ek) between 33 and
91 lmol photons m-2 s-1. These data imply that the pack
ice algal community at Shiretoko was healthy and actively
photosynthesising. Maximum quantum yield of the
Saroma-ko fast ice community was 0.401 ± 0.086, with
values for different species between 0.361 and 0.560. RLC
data from individual Saroma-ko fast ice algal cells indicated
relETR between 55.3 and 60.6, a values between
0.609 and 0.816 and Ek values between 74 and 91 lmol
photons m-2 s-1 which are consistent with measurements
in previous years.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | Okhotsk Sea ice algae Photosynthesis Saroma |
| Research Division: | Biological Sciences |
| Research Group: | Ecology |
| Research Field: | Marine and estuarine ecology (incl. marine ichthyology) |
| Objective Division: | Environmental Management |
| Objective Group: | Terrestrial systems and management |
| Objective Field: | Assessment and management of terrestrial ecosystems |
| UTAS Author: | McMinn, A (Professor Andrew McMinn) |
| ID Code: | 56020 |
| Year Published: | 2008 |
| Web of Science® Times Cited: | 23 |
| Deposited By: | IASOS |
| Deposited On: | 2009-03-20 |
| Last Modified: | 2009-06-10 |
| Downloads: | 0 |
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