Seasonal and areal changes in standing stocks of phytoplankton, zooplankton and micronekton in the eastern tropical pacific

Autor: M. Blackburn, B. Zeitzschel, R. M. Laurs, R. W. Owen
Rok vydání: 1970
Předmět:
Zdroj: Marine Biology. 7:14-31
ISSN: 1432-1793
0025-3162
Popis: Five standing stocks were measured together at similar latitudes and longitudes on seasonally repetitive cruises in 3 areas — western, eastern, and southern — of the eastern tropical Pacific. The stocks were chlorophyll a at 0 to 150 m depth (mg/m2), night and day zooplankton at 0 to 200 m depth (ml/1000 m3), and night crustacean micronekton and fish-pluscephalopod micronekton at 0 to 200 m depth (ml/1000 m3). The logarithms of the measurements of each stock in each area were subjected to analysis of variance with the following factors: season (2 month period), latitude, and longitude. Seasonal coverage was most comprehensive, with 7 successive periods, in the western area (approximately 16° N to 3° S latitude, 100° to 122° W longitude). Most stocks in most parts of the western area had a simple seasonal cycle of low amplitude, with a single maximum and minimum that usually differed by a factor
Databáze: OpenAIRE
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