Micro-phytoplankton variability at the equatorial Pacific (140W̊) during the JGOFS EQPAC Time Series Studies 1992 /
(SST = 25'C) were associated with increased abundance (range
| Main Author: | |
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1994.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | (SST = 25'C) were associated with increased abundance (range = 2xIO2 to 12xlo3 cells liter-1), and richness in rnicro- 140'W, during two JGOFS EqPac Time Series Studies, in order 3000 cells liter- 1) and carbon biomass (< 1 lAg C liter-1) abundance and species richness found in the equatorial an instability wave during March-April and October 1992, and coccolithophorids, were examined. During the abnormal and dinoffagenates were restricted to the surface and to the assemblage between March-April and October 1992, to find the average, micro-phytoplanlaon carbon ranged from 0.5 to 4.0 Ag by a colonial pennate diatom P. delicatissima. On the by low numbers of diatoms and coccolithophorids. The pennate C liter-1, where the diatom group consistently comprised the characterized the micro-phytoplankton structure, accompanied complex were important groups contributing to the total conditions in March-April 1992 exhibited lower micro- diatom, Pseudonitzschia delicatissima, and the thecate dinoflageflate, Oxytoxum variabile, were the most abundant during Time Series I. The presence of an El Niflo event and mainly due to the passage of a instability wave through the major part of the microphytoplanlaon autotrophic biomass in Micro-phytoplankton (>20 gm cell size) was sampled in the micro-phytoplankton carbon biomass. At the equator, diatoms October 1992. Also in contrast to the spring, in the autumn of three major taxonomic classes: diatoms, dinoflagellates organisms observed during the March-April 1992 Time Series Pacific at 140'W during the study periods. phytoplankton species assemblage, which was again dominated phytoplankton species richness and abundance compared with phytoplankton structure. Cell abundance and carbon biomass relate any changes in the environmental factors to micro- respectively, may explain most of the variability in silicified species of the 77zalassionemal77wlassiothrix spp. species, as well as chains of P. delicatissima, and heavily study site. During this period, the coldest temperatures study. The microphytoplankton assemblage during El Niflo the micro-phytoplankton assemblage showed large variability, the upper 60 m. Large centric diatoms, such as Rhizosolenia to determine the changes in the micro-phytoplanlcton upper 200 m of the water column at the Pacific equator, upper 60 m, respectively, during both Time Series cruises, vertical distribution of micro-phytoplankton taxa, and to warmth of El Nifto 1992 (S ST = 28 - 29'C), low abundance (< while coccolithophorid cells where concentrated at 90 m |
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| Item Description: | "Major subject: Oceanography". In title, numerals are used. Vita. |
| Physical Description: | viii, 74 leaves : illustrations, maps ; 28 cm. Also available online. |
| Bibliography: | Includes bibliographical references. |