Description
The water mass designated as the Southern or Antarctic Ocean is among the most productive areas of the world. In spite of the recent emphasis on biological oceanographic research, the species composition and distribution of the primary producers, mostly diatoms, has not been thoroughly examined in many areas. Knowledge of the organisms involved in primary production is of special interest as man considers use of marine resources to meet the needs of expanding world population. Phytoplankton diatoms in the Antarctic are the major food source for the tremendous krill (Euphausiacea) populations, which in turn are the food source for many of the large whale, seal, fish, and bird populations in this area. It is necessary to understand the species composition and ecology of the Antarctic primary producers and their relationship to the consumer levels in the food web before adequate use of the abundant marine resources of the Antarctic Ocean can proceed. This work is concerned with the most basic problem involved, the species composition of the phytoplankton diatoms and their distribution.
Enregistrements de données
Les données de cette ressource occurrence ont été publiées sous forme d'une Archive Darwin Core (Darwin Core Archive ou DwC-A), le format standard pour partager des données de biodiversité en tant qu'ensemble d'un ou plusieurs tableurs de données. Le tableur de données du cœur de standard (core) contient 1 434 enregistrements.
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Versions
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Comment citer
Les chercheurs doivent citer cette ressource comme suit:
Hargraves P E (2023): Species composition and distribution of net plankton diatoms in the Pacific sector of the Antarctic Ocean 1963-4. v1.0. Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node. Dataset/Occurrence. https://nzobisipt.niwa.co.nz/resource?r=diatom_antarctica_1964&v=1.0
Droits
Les chercheurs doivent respecter la déclaration de droits suivante:
L’éditeur et détenteur des droits de cette ressource est Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node. Ce travail est sous licence Creative Commons Attribution (CC-BY) 4.0.
Enregistrement GBIF
Cette ressource n'a pas été enregistrée sur le portail GBIF
Mots-clé
Occurrence; Observation
Contacts
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Couverture géographique
Pacific sector of the Antarctic Ocean
| Enveloppe géographique | Sud Ouest [-66,25, -176,633], Nord Est [-41,15, -76,267] |
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Couverture temporelle
| Date de début / Date de fin | 1963-10-13 / 1964-11-19 |
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Méthodes d'échantillonnage
The phytoplahkton samples used in this study were obtained in 1963-64 by various personnel of the Lamont Geological Observatory of Columbia University, aboard the USNS Eltanin, on cruise 10-15. Samples were obtained by making vertical hauls with a 0 .3m diameter net, #20 mesh, from about 50m depth to the surface, and by use of an electric water pump and plastic line, with the water intake located on the ship’s hull about 4m below the surface. The strained samples were adjusted to a small standard volume and preserved with 5% buffered sea water formalin; upon shipment to the Lamont laboratories, they were stored in the dark until examined.
| Etendue de l'étude | Pacific sector if the Antarctic (Southern) Ocean |
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Description des étapes de la méthode:
- For light microscopical observations, portions of the samples were washed free of preservative with glass-distilled water and mounted in Hyrax (refractive index=1.65), some with and some without preliminary oxidation of organic material in mineral acid. Duplicate slides were prepared of the samples, one set in the author's collection and one set to the Diatom Herbarium at the Philadelphia Academy of Natural Sciences. The liquid-preserved samples remain on file at Lamont Geological Observatory. Hyrax slides of material from selected stations have been deposited in the phytoplankton collection of the Virginia Institute of Marine Science. All species observed were listed for each station and photographed with a Wild M-20 microscope using Panatomic-X film.
- Further observations on the flora in some samples were made with the Philips EM-200 electron microscope. Both direct mounts of the material and carbon replicas were made, but since the silica frustule of diatoms is opaque to the electron beam, most observations were made with carbon replicas.
Citations bibliographiques
- Hargraves, Paul Eric, "Species composition and distribution of net plankton diatoms in the Pacific sector of the Antarctic Ocean" (1968). Dissertations, Theses, and Masters Projects. William & Mary. Paper 1539616686. https://dx.doi.org/doi:10.25773/v5-phv7-8y69 doi:10.25773/v5-phv7-8y69
Métadonnées additionnelles
marine, harvested by iOBIS
| Identifiants alternatifs | https://nzobisipt.niwa.co.nz/resource?r=diatom_antarctica_1964 |
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