In the framework of the researches aimed at evaluating the functional role of the different typologies of primary producers in the Lagoon of Venice (CORILA Research Programme 2004-2006, Line 312), the size distribution of the phytoplankton community has been analyzed, on a seasonally base. Emphasis has been paid on the spatial and temporal variations of autotrophic picoplankton (0.2 - 2 µm) and on its contribution to total phytoplankton biomass. Autotrophic picoplankton was mainly made up by cyanobacteria of the Synechococcus type and by small eucariotes, the larger fraction (> 3 µm) by diatoms and nanoflagellates. Picoplankton abundance (average: 15 x 106 cells dm-3) and biomass (average: 2.3 µC dm-3) indicate that this fraction represents a significant and persistent component of the phytoplankton in the Lagoon of Venice.
Picophytoplankton contribution to phytoplankton community in the Venice Lagoon
Bernardi Aubry F;Acri F;Pugnetti A
2007
Abstract
In the framework of the researches aimed at evaluating the functional role of the different typologies of primary producers in the Lagoon of Venice (CORILA Research Programme 2004-2006, Line 312), the size distribution of the phytoplankton community has been analyzed, on a seasonally base. Emphasis has been paid on the spatial and temporal variations of autotrophic picoplankton (0.2 - 2 µm) and on its contribution to total phytoplankton biomass. Autotrophic picoplankton was mainly made up by cyanobacteria of the Synechococcus type and by small eucariotes, the larger fraction (> 3 µm) by diatoms and nanoflagellates. Picoplankton abundance (average: 15 x 106 cells dm-3) and biomass (average: 2.3 µC dm-3) indicate that this fraction represents a significant and persistent component of the phytoplankton in the Lagoon of Venice.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
