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3. New high-tech flexible networks for the monitoring of deep-sea ecosystems

Author

Aguzzi, J., Chatzievangelou, D., Marini, S., Fanelli, E., Danovaro, R., Flogel, S., Juanes, F., De Leo, F., Del Rio, J., Laurenz, T., Costa, C., Riccobene, G., Tamburini, C., Lefevre, D., Gojak, C., Poulain, P-M., Favali, P., Griffa, A., Purser, A., Cline, D., Edgington, D., Navarro, J., Stefanini, S., Hondt, S. D, Priede, I. G., Rountree, R., and Company, J. B.

Subjects
Physics - Instrumentation and Detectors, Quantitative Biology - Populations and Evolution
Abstract

Increasing interest in the acquisition of biotic and abiotic resources from within the deep sea (e.g. fisheries, oil-gas extraction, and mining) urgently imposes the development of novel monitoring technologies, beyond the traditional vessel-assisted, time-consuming, high-cost sampling surveys. The implementation of permanent networks of seabed and water-column cabled (fixed) and docked mobile platforms is presently enforced, to cooperatively measure biological features and environmental (physico-chemical) parameters. Video and acoustic (i.e. optoacoustic) imaging are becoming central approaches for studying benthic fauna (e.g. quantifying species presence, behaviour, and trophic interactions) in a remote, continuous, and prolonged fashion. Imaging is also being complemented by in situ environmental-DNA sequencing technologies, allowing the traceability of a wide range of organisms (including prokaryotes) beyond the reach of optoacoustic tools. Here, we describe the different fixed and mobile platforms of those benthic and pelagic monitoring networks, proposing at the same time an innovative roadmap for the automated computing of hierarchical ecological information of deep-sea ecosystems (i.e. from single species abundance and life traits, to community composition, and overall biodiversity), Comment: 56 pages, 4 figures This document is the unedited Author's version of a Submitted Work that was subsequently accepted for publication in Environmental Science and Technology, copyright American Chemical Society after peer review. To access the final edited and published work see Journal Reference

Published
2022
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15. An ecosystem-based deep-ocean strategy

Author

Danovaro, R., Aguzzi, J., Fanelli, E., Billett, D., Gjerde, K., Jamieson, A., Ramirez-Llodra, E., Smith, C. R., Snelgrove, P. V. R., Thomsen, L., and Van Dover, C. L.

Published
2017

33. Megafaunal assemblages in deep-sea ecosystems of the Gulf of Cadiz, northeast Atlantic ocean

Author

Grinyó, J., Francescangeli, M., Santin, A., Ercilla, G., Estrada, F., Mechó, A., Fanelli, E., Costa, C., Danovaro, R., Company, J.B., Sobrino, I., Valencia, J., Aguzzi, J., Grinyó, J., Francescangeli, M., Santin, A., Ercilla, G., Estrada, F., Mechó, A., Fanelli, E., Costa, C., Danovaro, R., Company, J.B., Sobrino, I., Valencia, J., and Aguzzi, J.

Abstract

Deep-sea ecosystems of the Iberian margin have been widely impacted over the past decades, but the limited knowledge on their biodiversity and functioning limits our ability to contribute to their conservation. So far, in the Gulf of Cadiz, research has mostly been focused on megabenthic assemblages associated to mud volcanoes . However, several other geomorphological structures have remained widely unexplored. Here, by means of a quantitative analysis of 17 video transects conducted between 220 and 980 m depth, we investigated megabenthic assemblages associated to canyons, contouritic channels, contouritic furrows and open slopes. We report the presence of 8 different assemblages, segregated as a result of the different substrates and geomorphologic features. Megabenthic assemblages on hard substrates were characterized by mono or multispecific sponge assemblages. Soft bottoms hosted crinoid beds,pennatulacean meadows and fields of the gorgonian Radicipes gracilis. These results highlight the high diversity of megabenthic assemblages in deep-sea ecosystems of the Gulf of Cadiz and suggest that most of the geomorphological features that remained so far unexplored represent vulnerable marine ecosystems deser

Published
2022

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