Biomasa y distribución espacial del bacterioplancton en el sector norte de la plataforma continental argentina (34º S-41º S)

The northern sector of the Argentine continental shelf (34º S-41º S) is a highly productive area that sustains important fishery resources like Argentine anchovy (Engraulis anchoita) and is characterized by the presence of frontal zones with retention of detritus and plankton. In marine environments the bacterioplankton represents one of the main components of the trophic nets and plays a key role in biogeochemical cycles. In this ecosystem biomass and bacterioplankton distribution as well as their relation to environmental variables were analyzed. The highest chlorophyll a values, not significantly related to bacterioplankton (p > 0.05), were found in frontal and coastal areas. Abundance, bacterial biomass and cell volume values ranged 0.48-5.42 x 106 cells ml-1, 2-120.5 mg C l-1 and 0.004-0.156 um³. The General Linear Model applied showed the influence environmental parameters have on total bacteria. The maximum concentrations were found in frontal regions where high densities of Argentine anchovy eggs and larvae were reported in Spring, which demonstrates the importance bacterioplankton has in that productive area.

Bibliographic Details

Main Authors:	Hozbor, M.C., Hernández, D.R., Cucchi Colleoni, A.D., Costagliola, M.C., Peressutti, S.R.
Format:	Journal Contribution biblioteca
Language:	Spanish / Castilian
Published:	2013
Subjects:	Picoplankton, Bacteria, Biomass, Fronts, Coastal zone, Abundance, Environmental factors, Geographical distribution,
Online Access:	http://hdl.handle.net/1834/5498
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