European Ocean Biogeographic Information System

[ report an error in this record ] Printer-friendly version

Microphytobenthos in Panarea Island. ECO2 Project
Citation
T. Cibic, C. De Vittor (2018): Microphytobenthos in Panarea, ECO2 Project. OGS (Istituto Nazionale di Oceanografia e di Geofisica Sperimentale), Division of Oceanography. Italy. https://doi.org/10.6092/eff90de9-adef-4df3-b2b5-1f90a43a4b0a

Access data
Archived data
Availability: Creative Commons License This dataset is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Description
Microphytobenthos collected in Panarea Island in the framework of ECO2 Project. more

At all sampling stations and during all campaigns, sediment samples were collected by scuba divers with cut-off plastic syringes (2.6 cm i.d.). At each station and each sampling period, four sediment cores were sampled from which one was dedicated to the grain-size analysis and the remaining three to the microphytobenthic abundance (ABU) and community composition. Samplings were carried out during four sampling campaigns in the following periods: June and October 2012, May 2013 and May 2014. A total of five stations were sampled: three near Basiluzzo Island, characterised by different sediment colour and gas emission, and two NE of Panarea Island on a sampling site referred as “Hot-Cold” where the sediments are subjected to very different temperatures at a distance of approximately 1 m one from another. For the quantitative determination of microphytobenthos (MPB), the uppermost sediment layer obtained from three distinct sediment cores was fixed with 10 mL of 4% formaldehyde buffered solution (CaMg(CO3)2) in pre-filtered seawater (0.2 μm filter) and stored at 4 °C until processing. For each sampling, three replicates were counted for the Basiluzzo samples and two for the Hot-Cold stations as for the latter the standard deviation did not exceed 15%. After manual stirring, 125 μL aliquots of the sediment suspension were drawn off and placed in a counting chamber. To obtain an estimate of the total viable cells, only cells containing pigments and not empty frustules were counted under a Leitz inverted light microscope (Leica Microsystems AG) using a 32× objective (320× final magnification) (Utermöhl, 1958). Microphytobenthos community was divided into major taxonomic groups and within the group of diatoms more precise species identification was attempted. Diatoms frustule cleaning was performed by oxidizing subsamples with two time volume of hydrogen peroxide (35%) and ≈1 mL of sulphuric acid (95–97%) (CEN, 2003). Between single treatments, the subsamples were heated over a Bunsen burner until boiling and left under the hood for 24 h. After that, they were washed with Milli-Q water and left to settle for at least 24 h between single washings, until reaching a pH close to 7. All samples were then mounted on permanent slides in Naphrax™ (Northern Biological Supplies Ltd. Ipswich, UK) and observed under 1000× final magnification using a light microscope (LM) (Leica DM2500, Germany) equipped with a digital camera (Leica DFC490, Germany). Detailed information on: https://hdl.handle.net/10.1016/j.marenvres.2016.04.009

Scope
Themes:
Biology > Benthos, Biology > Phytoplankton
Keywords:
Marine, MED, Italy, Sicily: Aeolian I, Bacillariophyta, Chlorophyta, Dinophyta

Geographical coverage
MED, Italy, Sicily: Aeolian I

Temporal coverage
July 2011 - May 2014

Taxonomic coverage
Bacillariophyta [WoRMS]
Chlorophyta [WoRMS]
Dinophyta [WoRMS]

Parameter
Occurrence of biota

Contributors
National Institute of Oceanography and Experimental Geophysics (OGS), moredata creator

Related datasets
Published in:
EurOBIS: European Ocean Biogeographic Information System, more

Publication
Based on this dataset
Rogelja, M. et al. (2016). Microphytobenthic community composition and primary production at gas and thermal vents in the Aeolian Islands (Tyrrhenian Sea, Italy). Mar. Environ. Res. 118: 31-44. https://hdl.handle.net/10.1016/j.marenvres.2016.04.009, more


Dataset status: Completed
Data type: Data
Data origin: Monitoring: field survey
Metadatarecord created: 2017-07-10
Information last updated: 2018-04-27
All data in IMIS is subject to the VLIZ privacy policy