Seafloor morphology changes in the inner-shelf area of the Pozzuoli Bay, Eastern Tyrrhenian Sea

Marine geological maps of the Campania region have been constructed both to a 1:25.000 and to a 1:10.000 scale in the frame of the research projects financed by the Italian National Geological Survey, focusing, in particular, on the Gulf of Naples (Southern Tyrrhenian Sea), a complex volcanic area where volcanic and sedimentary processes strongly interacted during the Late Quaternary and on the Cilento Promontory offshore. In this paper, the examples of the geological sheets n. 464 “Isola di Ischia” and n. 502 “Agropoli” have been studied. The integration of the geological maps with the seismo-stratigraphic setting of the study areas has also been performed based on the realization of interpreted seismic profiles, providing interesting data on the geological setting of the subsurface. The coastal geological sedimentation in the Ischia and Agropoli offshore has been studied in detail. The mapped geological units are represented by: i) the rocky units of the acoustic basement (volcanic and/or sedimentary); ii) the deposits of the littoral environment, including the deposits of submerged beach and the deposits of toe of coastal cliff; iii) the deposits of the inner shelf environment, including the inner shelf deposits and the bioclastic deposits; iv) the deposits of the outer shelf environment, including the clastic deposits and the bioclastic deposits; v) the lowstand system tract; vi) the Pleistocene relict marine units; vii) different volcanic units in Pleistocene age. The seismo-stratigraphic data, coupled with the sedimentological and environmental data provided by the geological maps, provided us with new insights on the geologic evolution of this area during the Late Quaternary.

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Organochlorine pesticides residues and PCBs in benthic organisms of the inner shelf of the São Sebastião Channel, São Paulo, Brazil

Brazilian Journal of Oceanography ◽

10.1590/s1679-87592004000200006 ◽

2004 ◽

Vol 52 (2) ◽

pp. 141-151 ◽

Cited By ~ 7

Author(s):

Rosângela Gorni ◽

Rolf Roland Weber

Keyword(s):

Pesticide Residues ◽

Feeding Habits ◽

Human Consumption ◽

Shelf Area ◽

Benthic Organisms ◽

Inner Shelf ◽

Industrial Activities ◽

Pesticides Residues ◽

Marine Areas ◽

Land Runoff

Thirty seven benthic samples of the inner shelf area of São Sebastião, Brazil, were collected between April 1994 and August 1998 and analysed for seventeen chlorinated pesticide residues and PCBs congeners. Pesticide residues and PCBs congeners levels were low (ng/g) and predominantly found in the crustacean samples. DDE was the most frequently residue with a maximum of 9,7 ng/g followed by HCHs with maximum of 17,1ng/g. As for the PCBs, the heavier congeners predominate: CB 138,153,170, 180 and 183. Maximum total PCBs was 17,4 ug/g in a crab sample. Higher levels of PCBs are related to feeding habits and local inputs of raw sewage or land runoff. Although EPA and FDA (U.S.A) below the guidelines for human consumption propose these levels, they do show that even in marine areas without intense agricultural or industrial activities these compounds are present at detectable levels.

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Marine geological maps of the Campania Region (Southern Tyrrhenian sea, Italy): considerations and contributions to a different scale of geological survey

Journal of Geography and Cartography ◽

10.24294/jgc.v1i3.507 ◽

2018 ◽

Vol 1 (3) ◽

Cited By ~ 2

Author(s):

Gemma Aiello

Keyword(s):

Late Quaternary ◽

Environmental Data ◽

Geological Survey ◽

Volcanic Area ◽

Tyrrhenian Sea ◽

Inner Shelf ◽

Acoustic Basement ◽

Campania Region ◽

Geological Maps ◽

Southern Tyrrhenian Sea

Marine geological maps of the Campania region have been constructed both to 1:25.000 and to a 1:10.000 scales in the frame of research projects financed by the Italian National Geological Survey, focusing, in particular, on the Gulf of Naples (Southern Tyrrhenian sea), a complex volcanic area where volcanic and sedimentary processes strongly interacted during the Late Quaternary and on the Cilento Promontory offshore. In this paper the examples of the geological sheets n. 464 “Isola di Ischia” and n. 502 “Agropoli” have been studied. The integration of the geological maps with the seismo-stratigraphic setting of the study areas has also been performed based on the realization of interpreted seismic profiles, providing interesting data on the geological setting of the subsurface. The coastal geological sedimentation has been studied in detail in the Ischia and Agropoli offshore. The mapped geological units are represented by: i) the rocky units of the acoustic basement (volcanic and/or sedimentary), ii) the deposits of the littoral environment, including the deposits of submerged beach and the deposits of toe of coastal cliff, iii) the deposits of the inner shelf environment, including the inner shelf deposits and the bioclastic deposits, iv) the deposits of the outer shelf environment, including the clastic deposits and the bioclastic deposits, v) the Lowstand System Tract, vi) the Pleistocene relict marine units, vii) different volcanic units, Pleistocene in age. The seismo-stratigraphic data, coupled with the sedimentological and environmental data provided by the geological maps, allow to give new insights on the geologic evolution of this area during the Late Quaternary.

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Effects of anti-trawling artificial reefs on ecological indicators of inner shelf fish and invertebrate communities in the Cantabrian Sea (southern Bay of Biscay)

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315410000329 ◽

2010 ◽

Vol 91 (3) ◽

pp. 623-633 ◽

Cited By ~ 7

Author(s):

Alberto Serrano ◽

Cristina Rodríguez-Cabello ◽

Francisco Sánchez ◽

Francisco Velasco ◽

Ignacio Olaso ◽

...

Keyword(s):

Sea Urchins ◽

Recovery Period ◽

Total Biomass ◽

Shelf Area ◽

Inner Shelf ◽

Generalist Species ◽

Stock Biomass ◽

Key Factor ◽

Total Stock ◽

Zeus Faber

The analyses presented in this paper provide evidence that several community metrics and indicators of the inner shelf community in the Cantabrian Sea show response to placement of anti-trawling reefs. Total biomass, species richness, and to a lesser extent, maximum length and percentage of large fish, were sensitive to exclusion of trawling. Density, diversity and average trophic level did not show this sensitivity. The main species profiting from trawl exclusion were seabreams (Sparidae), catsharks and skates (Elasmobranchii), red mullets (Mullidae), gurnards (Triglidae) and John Dory (Zeus faber). Conversely, the main fishery target species (hake, anglerfish and megrim) showed a progressive decrease in abundance during the study period, a pattern which was also shown by their total stock biomass in the totality of the shelf area. Sea urchins, cephalopods and gastropods also increased in relative abundance with trawl exclusion. Reef age was identified as a key factor in reef development. After reef deployments, two periods were identified: (1) a recovery period, in which total biomass increased, mainly as a consequence of the increase in generalist species (e.g. catsharks); and (2) a consolidation period, during which biomass increased again, mainly as a consequence of an increase in specialized stenoic species (e.g. sparids), while biomass of generalist species remained constant or declined.

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The Depositional Environments in the Cilento Offshore (Southern Tyrrhenian Sea, Italy) Based on Marine Geological Data

Journal of Marine Science and Engineering ◽

10.3390/jmse9101083 ◽

2021 ◽

Vol 9 (10) ◽

pp. 1083

Author(s):

Gemma Aiello ◽

Mauro Caccavale

Keyword(s):

Continental Shelf ◽

Late Quaternary ◽

Depositional Environments ◽

Geological Mapping ◽

Outer Shelf ◽

Tyrrhenian Sea ◽

Outer Continental Shelf ◽

Inner Shelf ◽

Depositional Sequence ◽

System Tract

The depositional environments offshore of the Cilento Promontory have been reconstructed based on the geological studies performed in the frame of the marine geological mapping of the geological sheet n. 502 “Agropoli”. The littoral environment (toe-of-coastal cliff deposits and submerged beach deposits), the inner continental shelf environment (inner shelf deposits and bioclastic deposits), the outer continental shelf environment (outer shelf deposits and bioclastic deposits), the lowstand system tract and the Pleistocene relict marine units have been singled out. The littoral, inner shelf and outer shelf environments have been interpreted as the highstand system tract of the Late Quaternary depositional sequence. This sequence overlies the Cenozoic substratum (ssi unit), composed of Cenozoic siliciclastic rocks, genetically related with the Cilento Flysch. On the inner shelf four main seismo-stratigraphic units, overlying the undifferentiated acoustic basement have been recognized based on the geological interpretation of seismic profiles. On the outer shelf, palimpsest deposits of emerged to submerged beach and forming elongated dunes have been recognized on sub-bottom profiles and calibrated with gravity core data collected in previous papers. The sedimentological analysis of sea bottom samples has shown the occurrence of several grain sizes occurring in this portion of the Cilento offshore.

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