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Temporal Variations of Zooplankton Biomass in the Ligurian Sea Inferred from Long Time Series of Adcp Data : Volume 10, Issue 4 (16/08/2013)

By Bozzano, R.

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Book Id: WPLBN0004020710
Format Type: PDF Article :
File Size: Pages 38
Reproduction Date: 2015

Title: Temporal Variations of Zooplankton Biomass in the Ligurian Sea Inferred from Long Time Series of Adcp Data : Volume 10, Issue 4 (16/08/2013)  
Author: Bozzano, R.
Volume: Vol. 10, Issue 4
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2013
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Pensieri, S., Picco, P., Fanelli, E., Bozzano, R., & Schiano, M. E. (2013). Temporal Variations of Zooplankton Biomass in the Ligurian Sea Inferred from Long Time Series of Adcp Data : Volume 10, Issue 4 (16/08/2013). Retrieved from http://worldlibrary.net/


Description
Description: National Research Council of Italy (CNR-ISSIA) – Via de Marini 6, 16149, Genova, Italy. Three years of 300 kHz ADCP data collected in the central Ligurian Sea are analyzed to investigate the variability of the zooplankton biomass and the Diel Vertical Migrations (DVM) in the upper thermocline. After a pre-processing aimed at avoiding the slant range attenuation, hourly volume backscattering strength time series are obtained. Despite the lack of concurrent net samples collection, different migration patterns are identified and their temporal variability examined by means of time-frequency analysis. The effect of changes in the environmental condition is also investigated. Highest zooplankton biomasses are observed in April–May just after the peak of surface primary production in March–April. The main migration pattern points to a nocturnal migration with zooplankton organisms occurring deeper in the water column during the day and shallower at night. Also twilight migration is highlighted during this study. The largest migrations are recorded in November–December, corresponding to lowest backscattering strength values and are likely attributable to larger and more active organisms (i.e. euphausiids and mesopelagic fish). The results suggest further applications of the historical ADCP time series available.

Summary
Temporal variations of zooplankton biomass in the Ligurian Sea inferred from long time series of ADCP data

Excerpt
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