Campaign: INDEMARES/CHICA 0211
Description
The main goal of the INDEMARES CHICA 0211 oceanographic cruise was to study the associated habitats and the environmental conditions related to areas of the gas seepages in the Gulf of Cadiz. For this, the sampling in different mud volcanos was planned using a various methodology: fishing trawl, beam trawl, box corer, gravity corer, benthic trawling dredge, ADCP, and oceanographic sampling carousel (CTD, ADCP, oximeter, turbidity sensor, fluorimeter).The survey was carried out between the 10th February 2011 and the 7th March 2011 having Cadiz as a base port. The fair-weather remained during the campaign except on the 16th February because of the storm conditions.Mud volcanoes (Albolote, Gazul, Anastasya, Tarsis, Pipoca, Chica, Aveiro, Hesperides and Almazan) were sampled on the top, on the slope and on the adjacent areas of each one with the methodologies before mentioned. So, it was collected the following samplings: 47 benthic trawling dredges, 31 beam trawl, 12 fishing trawl, 40 box corers, 10 gravity corers, 132 CTDs and 84 oceanographic sampling carousel.The preliminary results have confirmed the existence of habitats associated with the gas seepages, and other habitats that are included in the Directive Habitats 2000 and OSPAR, as gorgonian reefs over carbonated hard substrate, coral bamboo fields, Isidella, in muddy seafloor, deep sponge aggregations,and communities of the Pennatulacea and of the burrowing megafauna on soft bottoms.
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