Enzymatic activities and prokaryotic abundance in relation to organic matter along a West-East Mediterranean transect (TRANSMED cruise).

Microbial Ecology
R ZacconeM Turchetto

Abstract

The distribution of extracellular enzymatic activities (EEA) [leucine aminopeptidase (LAP), ß-glucosidase (GLU), alkaline phosphatase (AP)], as well as that of prokaryotic abundance (PA) and biomass (PB), dissolved organic carbon (DOC), particulate organic carbon and particulate total nitrogen (POC, PTN), was determined in the epi-, meso-, and bathypelagic waters of the Mediterranean Sea along a West-East transect and at one Atlantic station located outside the Strait of Gibraltar. This study represents a synoptical evaluation of the microbial metabolism during early summer. Decreasing trends with depth were observed for most of the parameters (PA, PB, AP, DOC, POC, PTN). Significant differences between the western and eastern basins of the Mediterranean Sea were found, displaying higher rates of LAP and GLU and lower C/N ratios more in the eastern than in the western areas. Conversely, in the epipelagic layer, PA and PB were found to be higher in the western than in the eastern basins. PB was significantly related to DOC concentration (all data, n = 145, r = 0.53, P < 0.01), while significant correlations of EEA with POC and PTN were found in the epipelagic layer, indicating an active response of microbial metabolism to organi...Continue Reading

References

Nov 1, 1993·Applied and Environmental Microbiology·J Martinez, F Azam
Aug 21, 2009·The ISME Journal·Roi FeingerschOded Béjà

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Citations

Aug 2, 2015·Marine Environmental Research·R ZacconeR La Ferla
Mar 23, 2017·The ISME Journal·Greta ReintjesRudolf Amann
Oct 31, 2019·AIMS Microbiology·Renata Zaccone, Gabriella Caruso

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