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Zoobenthos of the CINECA area and other upwelling regions
Thiel, H. (1982). Zoobenthos of the CINECA area and other upwelling regions. Rapp. et Proc.-Verb. Cons. Int. Explor. Mer 180: 323-334
In: Rapports et Procès-Verbaux des Réunions du Conseil Permanent International pour l'Exploration de la Mer. Conseil Permanent International pour l'Exploration de la Mer: Copenhague. ISSN 0074-4336, more

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Keywords
    Organic matter; Population number; Upwelling; Zoobenthos; Atlantic South East [Marine Regions]; Marine

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  • Thiel, H.

Abstract
    This paper contains some original data and summarizes what is known on the benthos of upwelling areas. The present results originate from Meteor cruises 26, 36, and 44. A high standing stock of benthic animals is to be expected in upwelling regions. Off Cape Blanc a low faunal density and a low content of organic matter are encountered on the upper slope, while high values characterize the lower slope area. These deviations from an expected decrease with water depth are related to downwelling processes, accelerating the transport of energy-rich food particles into deeper water layers. The sedimentary environment of the organisms is largely determined by its organic matter content. Off Chile, Peru, and Southwest Africa, negative redox potential at the sediment surface are present in some regions and sulfide biomes are developed with intense microbial populations, but a reduction in macrofaunal elements. Those cases seem to be absent or rare off Northwest Africa.

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