Plattform Platform	Reise-Nr. Cruise-No.	Zeitraum Period	Projekt Project	Arbeitsgebiet Working area
Poseidon	POS514	27.05.2017 - 16.06.2017		Adriatic Sea

Fahrtleiter Chief Scientist	Institut Institute	Auslaufhafen Port of departure	Einlaufhafen Port of return	Stationskarte Station map	Schiffsroute Trackchart
Schulz Hartmut	Geologisch-Palaeontologisches Institut der Universitat Tubingen	Heraklion	Dubrovnik

Ziel der Reise / Objectives of Cruise:

As a German-Croatian-Italian-Austrian consortium of Tubingen, Zagreb, Trieste and Vienna research institutions, we proposed a marine (micro)paleontological/geological expedition with RV POSEIDON to the northern and eastern Adriatic Sea for 21 days (8.9 days of steaming and profiling, 4.1 days of station work, and 4.2 days of transit, 3.8 days reserve). At 34 stations we planned to perform hydrographic water (flourescence probe, CTD-rosette, ?en route/on station" pumping, multinet) sampling and geological (multi-, Grab/box/Frahm-, gravity corer) sedimentary sampling, and specific probing of the stiff littoral sands by hammer coring by the Vienna University group. On this cruise, starting on the eastern side of Otranto Strait and set opposite to the direction of the cyclonic surface circulation in the Adriatic Basin, we (1) focused on the increasingly marine characteristics of the water column to determine the distribution of calcareous plankton (planktic foraminifera, coccolithophores, calcareous dinoflagellates) within the Adriatic basin, and (2) used shallow sediment sampling to recover, among other groups, the dead and life fauna of benthic foraminifera, including ex-situ feeding experiments on board. (3) Together with our Vienna colleagues, from these sediments we will also study the immigration patterns and taphonomic preservation of the particular warm-temperate marine micro- and macrofauna off Istria and along the eastern margin of the Adriatic Sea. (4) We planned to sample the Late Holocene to Pleistocene sedimentation of the central Adriatic Sea, and off Istria and Croatia, where we expected by the participation of our Croatian colleagues to recover sediment sections by robust short gravity-or hammer coring, documenting the Early Holocene/Latest Pleistocene marine transgression and early immigration patterns of marine biota during and after the deglacial sea-level rise. The stations along the cruise track allow for comparisons between the eastern and western sides of the Adriatic Sea basin and to study the faunal changes along environmental gradients (east - surface water marine inflow; west – Adriatic water outflow). The coverage of the north-eastern and eastern sides of the basin may allow to better define the marine elements in the epicontinental Adriatic Sea waters and sediments, and may be used for a better (historical) reconstruction of the faunal and floral migrations from the open Ionian Sea into the Adriatic Basin. Table 1.Summary of all 363 casts of instruments during cruise POS514, grouped to six ranges of water depths. CTD casts were taken from every new station. Van Veen grabs GRAB-, Frahm corer FC-, and box cores BC ware mostly used at shallow water depths of <500m, gravity cores GC and a multiple opening-closing plankton net MSN were preferred at deeper stations. Note GCs (6) from <30 water depth W.D that were not successful, due to sandy ground. W.D. (m) CTD MSN MUC FC BC GRAB GC Sum > 1000m 5 15 4 - 5 - 2 31 500 - 1000m 8 19 8 4 - 10 6 55 100 - 500m 9 21 8 20 10 48 10 126 50 - 100m 2 5 - 9 2 10 2 30 30 - 50m 4 - 1 6 6 27 3 47 < 30m 5 - - 7 20 36 6 74 Sum 33 60 21 46 43 131 29 363

Messungen / Measurements