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Abundance of plankton animals in relation to the age of ecosystem

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Title Abundance of plankton animals in relation to the age of ecosystem
 
Creator Vannucci, M.
Santhakumar, V.
 
Description 119-124
Analysis of relative abundance of Chaetognatha and Medusae (carnivores) to Copelata (nannoplankton feeders) and of each one of them to the total biomass and total number of animals in the samples shows that the relative numbers of Copelata decrease in the older ecosystems, while they are at their maximum in upwelling waters, an ecosystem at its inception. The number of Chaetognatha increases in maturing ecosystems and again decreases as the system becomes older by drifting away from upwelling areas or where there is a pronounced stratification. The relative abundance of plankton animals belonging to these groups is different in each of the water masses studied and also varies in different seasons. Thus the Somali coast upwelling waters have a percentage composition of the plankton categories studied different from that of the upwelling waters off Arabia, although they are both young ecosystems; the northern, central and southern Bay of Bengal also differ between them, although they belong to a main single category and finally the structure of the association at the end of summer and at the end of winter in the southern Gyral waters appears to be somewhat different. The other water masses studied also show structural peculiarities.
 
Date 2017-01-04T04:29:03Z
2017-01-04T04:29:03Z
1972-12
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://nopr.niscair.res.in/handle/123456789/39617
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.01(2) [December 1972]