Excel · collection · 1992
Sub-ice algal assemblages of the Barents Sea: Species compostion, chemical composition, and growth rates 1986 - 1988
Listed in NASA Earthdata CMR
This dataset describes ice algae (10 species; 38 rows) of the Barents Sea studied from 1986 to 1988.
Description
With a few exceptions, the ice algal assemblages were dominated by pennate diatoms. From March to early June there was a transition from a mixed population of both centric and pennate diatoms at the start into a well developed Nitzschia frigida assemblage.
Nutrients in ice-covered regions were high in spring, and high N/C and protein/carbohydrate ratios indicated no nutrient deficiency in the ice algae. The N/P ratios were lower than 15, but comparable to ratios of three ice algae species grown in culture at -0.5 C and various light conditions. The Si/N ratios were lower than corresponding ratios from the Canadian Arctic and the Anarctic.
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The chemical composition revealed that silicate limited growth cannot be excluded. The cells were heavily shade-adapted the entire spring season, with high Chl/C ratios (0.045-0.084), comparable to the cultures growing at low irradiances. The growth rates in the cultures peaked at 50 μmol m-2 s-1 with maximum rates of 0.6-0.8 div. day-1, both for 12 and 24 h day lengths.
The low growth rates for the May assemblages (max 0.20 div. day-1) indicated strong light limitation by self-shading. Adaptation experiments showed that some ice algae are highly adaptable, while others are not able to adjust by high irradiances, and this may affect the distribution in the field.
Links
Get the data
- GET DATA ak.aoos.org/data/archive/2009/0000007 ↗
download · from NASA CMR
Documentation and papers
- VIEW RELATED INFORMATION ak.aoos.org/rest/metadata/ArcOD/2008I4 ↗
documentation · from NASA CMR
- VIEW RELATED INFORMATION arcodiv.org ↗
documentation · from NASA CMR
Catalogue records · 2
- CMR record cmr.earthdata.nasa.gov/search/concepts/C1214595030-SCIOPS.html ↗
catalogue entry · from NASA CMR
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C1214595030-SCIOPS.umm_json ↗
metadata API · from NASA CMR
Topics
- Stated by source
- CORING DEVICES · Diatoms · Macroalgae (Seaweeds) · PLANKTON NETS · SHIPS
Provenance · 1 source records, 13 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C1214595030-SCIOPS | 14 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[instrument].gcmd_instrument:coring-devices | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[instrument].gcmd_instrument:plankton-nets | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/biological-classification/plants/macroalgae-seaweeds | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/biological-classification/plants/microalgae/diatoms | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[platform].gcmd_platform:ships | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| description | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/Abstract |
| license_text | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| publication_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| spatial | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/SpatialExtent |
| temporal | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/TemporalExtents |
| title | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/EntryTitle |
| version_label | source · NASA CMR | connector:nasa_cmr@1.0.0 |