82 research outputs found
Compilation of the scientific primary data of the CINCS project from the Eastern Mediterranean
No full textThe coordination of the project was undertaken by the Institute of Marine Biology of Crete and involved collaboration with 40 scientists from seven other laboratories (Netherlands Institute for Sea Research, National Centre of Marine Research in Athens, University of Genova, University of Tromso, Southampton Oceanography Centre, University of Crete and the Laboratory of Marine Microbiology in Marseille) representing six of the European Union countries. The study area was a 30 x 40 nm area in the south Cretan Sea contiguous to the northern coast of the island of Crete and cover a bathymetric depth range of 40–1570 m. Sampling was conducted at a grid of stations which were intensively sampled on eight bimonthly oceanographic cruises between May 1994 and September 1995. Two research vessels (R/V Aegaeo, Philia) were used simultaneously to cope with the intensive sampling schedule and a number of technologically advanced sampling gears (including benthic landers, time lapse cameras and a submersible) were used for the first time in the Eastern Mediterranean. CINCS has made a substantial contribution to our knowledge of how this extremely oligotrophic ecosystem functions and its underlying seasonal and interannual dynamics. It was the first time that many of the measurements made had been undertaken in the Eastern Mediterranean Sea and so the information they have provided will continue to be useful as a baseline data set for future research projects
(Table 6) Total biomass in surface sediments of the Cretan Sea
No full textUndisturbed sediment samples were collected using a multicorer (Barnett, Watson and Connelly (1984): 8 cores, i.d. 9.5 cm), penetrating 20–30 cm deep into the sediments. Upon recovery all cores were vertically divided into 5 layers: 0-1, 1-2, 2-4, 4-6, 6-10 cm depth
(Table 3) Meiofauna density in surface sediments of the Cretan Sea
No full textUndisturbed sediment samples were collected using a multicorer (Barnett, Watson and Connelly (1984): 8 cores, i.d. 9.5 cm), penetrating 20–30 cm deep into the sediments. Upon recovery all cores were vertically divided into 5 layers: 0-1, 1-2, 2-4, 4-6, 6-10 cm depth
(Table 2) Bacterial densities and biomass in surface sediments of the Cretan Sea
No full textUndisturbed sediment samples were collected using a multicorer (Barnett, Watson and Connelly (1984): 8 cores, i.d. 9.5 cm), penetrating 20-30 cm deep into the sediments. Upon recovery all cores were vertically divided into 5 layers: 0-1, 1-2, 2-4, 4-6, 6-10 cm depth
(Table 1) Chlorophyll and phaeopigment concentrations in surface sediments of the Cretan Sea
No full textUndisturbed sediment samples were collected using a multicorer (Barnett, Watson and Connelly (1984): 8 cores, i.d. 9.5 cm), penetrating 20-30 cm deep into the sediments. Upon recovery all cores were vertically divided into 5 layers: 0-1, 1-2, 2-4, 4-6, 6-10 cm depth. For carbohydrate, lipid and protein datas see dataset: doi:10.1594/PANGAEA.759831
(Table 4) Meiofauna biomass in surface sediments of the Cretan Sea
No full textUndisturbed sediment samples were collected using a multicorer (Barnett, Watson and Connelly (1984): 8 cores, i.d. 9.5 cm), penetrating 20–30 cm deep into the sediments. Upon recovery all cores were vertically divided into 5 layers: 0-1, 1-2, 2-4, 4-6, 6-10 cm depth
(Table 5) Meiofauna individual biomass in surface sediments of the Cretan Sea
No full textUndisturbed sediment samples were collected using a multicorer (Barnett, Watson and Connelly (1984): 8 cores, i.d. 9.5 cm), penetrating 20‚Äì30 cm deep into the sediments. Upon recovery all cores were vertically divided into 5 layers: 0-1, 1-2, 2-4, 4-6, 6-10 cm depth. Biomass in µg dry weight
Meiofauna of surface sediments in the Cretan Sea
No full textQuantitative information on metazoan meiofaunal abundance and biomass was obtained from three continental shelf (at 40, 100 and 200 m depth) and four deep-sea stations (at 540, 700, 940 and 1540 m depth) in the Cretan Sea (South Aegean Sea, NE Mediterranean). Samples were collected on a seasonal basis (from August 1994 to September 1995) with the use of a multiple corer. Meiofaunal abundance and biomass on the continental shelf of the Cretan Sea were high, in contrast to the extremely low values reported for the bathyal sediments that showed values comparable to those reported for abyssal and hadal environments. In order to explain the spatial and seasonal changes in metazoan meiofauna these data were compared with: (1) the concentrations of 'food indicators' (such as proteins, lipids, soluble carbohydrates and CPE) (2) the bacterial biomass (3) the flux of labile organic compounds to the sea floor at a fixed station (D7, 1540 m depth). Highly significant relationships between meiofaunal parameters and CPE, protein and lipid concentrations and bacterial biomass were found. Most of the indicators of food quality and quantity (such as CPE, proteins and carbohydrates) showed a clear seasonality with highest values in February and lowest in September. Such changes were more evident on the continental shelf rather than at deeper depths. On the continental shelf, significant seasonal changes in meiofaunal density were related to changes in the input of labile organic carbon whereas meiofaunal assemblages on the deep-sea stations showed time-lagged changes in response to the food input recorded in February 95. At all deep-sea stations meiofaunal density increased with a time lag of 2 months. Indications for a time-lagged meiofaunal response to the food inputs were also provided by the increase in nauplii densities during May 95 and the increase in individual biomass of nematodes, copepods and polychaetes between February and May 1995. The lack of strong seasonal changes in deep sea meiofaunal density suggests that the supply of organic matter below 500 m is not strong enough to support a significant meiofaunal development. Below 700 m depth >92% of the total biomass in the sediment was represented by bacteria. The ratio of bacterial to meiofaunal biomass increased with increasing water depth indicating that bacteria are probably more effective than meiofauna in exploiting refractory organic compounds. These data lead us to hypothesise that the deep-sea sediments of the Cretan Sea are largely dependent upon a benthic microbial loop
Microplankton abundance in the euphotic zone of the Cretan Sea at Station NOVEMBER-1994-D2
No full textMicroplankton species composition analysis was performed according to the inverted microscope method of Utermoehl. Samples for identification and enumeration of larger phytoplankton cells (>5 µm) were preserved in alkaline Lugol solution. Utermoehl, H., 1958. Zur Vervollkommung der quantitativen Phytoplankton-Methodik. Mitt. Int. Ver. Theor. Angew. Limnol., 9:1-38
Microplankton abundance in the euphotic zone of the Cretan Sea at Station MAY-1995-D4
No full textMicroplankton species composition analysis was performed according to the inverted microscope method of Utermoehl. Samples for identification and enumeration of larger phytoplankton cells (>5 µm) were preserved in alkaline Lugol solution. Utermoehl, H., 1958. Zur Vervollkommung der quantitativen Phytoplankton-Methodik. Mitt. Int. Ver. Theor. Angew. Limnol., 9:1-38
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