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Description of a new genus and species of Chrysopetalidae (Annelida: Polychaeta...
Ravara, Ascensão; Aguado, M. Teresa; Rodrigues, Clara F.; Génio, Luciana; Cunha, Marina R.Five chrysopetalid species are reported from samples collected at bathyal depths in three NE Atlantic regions: the Bay of Biscay, the Horseshoe Abyssal Plain and the Gulf of Cadiz. Arichlidon reyssi (Katzmann et al., 1974), Dysponetus caecus (Langerhans, 1880) and D. profundus Böggemann, 2009 are free-living forms found mainly on biogenic substrates (e.g., coral and sunken wood). A brief description and taxonom...
Bottom-trawling fisheries influence on standing stocks, composition, diversity ...
Ramalho, Sofia P.; Almeida, Mariana; Esquete, Patricia; Génio, Luciana; Ravara, Ascensão; Rodrigues, Clara F.; Lampadariou, Nikolaos; Vanreusel, AnnBottom-trawling fisheries operating in Portugal (West Iberian Margin) impose one of the largest footprints per unit of biomass landed in European waters at depths greater than 200 m, affecting the seafloor integrity and the associated benthic fauna. To investigate how trawling pressure is affecting the macrofaunal assemblages, we compared the standing stock (abundance and biomass), community structure and taxon...
Mammal carcasses attract a swarm of mussels in the deep Atlantic: insights into...
Génio, Luciana; Rodrigues, Clara F.; Guedes, Inês F.; Almeida, Hélio; Duperron, Sébastien; Hilário, AnaFive mammal carcasses were experimentally deployed at 1000 m depth in the Setubal Canyon (NE Atlantic) in March 2011 and the remaining bones were collected after 18 and 28 months. High numbers (1.92–6.27 individuals cm2) of small mussels were found among a diverse invertebrate assemblage colonizing surfaces, crevices and cavities in the trabecular matrix of bones. In this study we characterized the mussel popul...
Trace element fingerprinting of cockle (Cerastoderma edule) shells can reveal h...
Ricardo, Fernando; Génio, Luciana; Leal, Miguel Costa; Albuquerque, Rui; Queiroga, Henrique; Rosa, Rui; Calado, RicardoDetermining seafood geographic origin is critical for controlling its quality and safeguarding the interest of consumers. Here, we use trace element fingerprinting (TEF) of bivalve shells to discriminate the geographic origin of specimens. Barium (Ba), manganese (Mn), magnesium (Mg), strontium (Sr) and lead (Pb) were quantified in cockle shells (Cerastoderma edule) captured with two fishing methods (by hand and...
An enigmatic kilometer-scale concentration of small mytilids (Late Miocene, Gua...
Aguirre, Julio; Braga, Juan C.; Martín, José M.; Puga-Bernabéu, Ángel; Pérez-Asensio, José N.; Sánchez-Almazo, Isabel M.; Génio, LucianaUpperMiocene heterozoan carbonates crop out extensively in a NE–SW-trending belt (42 km long and 1.5–8 km wide) along the so-called El Alcor topographic high, fromCarmona to Dos Hermanas (Seville, S Spain). These carbonates formed at the southern active margin of the Guadalquivir Basin, the foreland basin of the Betic Cordillera. They change to marls basinward (NE) and to sands landward (SE and SW). Therefore, ...
Effects of sample storage and shell orientation on LA-ICPMS trace element measu...
Génio, Luciana; Simon, Klaus; Kiel, Steffen; Cunha, Marina R.Geochemical markers are being increasingly applied to fundamental questions in population and community ecology in marine habitats because they allow inferences on individuals dispersal, but vital effects, small sample size and instrumental limitation are still challenging particularly in deepsea studies. Here we use shells of the deep-sea bivalve Idas modiolaeformis to assess potential effects of sample storag...
First clues on the ecology of whale falls in the deep Atlantic Ocean: results f...
Hilário, Ana; Cunha, Marina R.; Génio, Luciana; Marçal, Ana Raquel; Ravara, Ascensão; Rodrigues, Clara F.; Wiklund, HelenaSunken whale carcasses, known as ‘whale falls’, deliver large pulses of organic material to the seafloor and serve as habitat islands for unique assemblages of deep-sea fauna that include generalist scavenging species, chemosynthetic fauna related to those from hydrothermal vents and cold seeps, and bone-specialist species. Despite the growing interest in this peculiar habitat in the last decade, all long-term ...
Trace element fingerprinting of cockle (Cerastoderma edule) shells can reveal h...
Ricardo, Fernando; Génio, Luciana; Costa Leal, Miguel; Albuquerque, Rui; Queiroga, Henrique; Rosa, Rui; Calado, RicardoDetermining seafood geographic origin is critical for controlling its quality and safeguarding the interest of consumers. Here, we use trace element fingerprinting (TEF) of bivalve shells to discriminate the geographic origin of specimens. Barium (Ba), manganese (Mn), magnesium (Mg), strontium (Sr) and lead (Pb) were quantified in cockle shells (Cerastoderma edule) captured with two fishing methods (by hand and...
The snails' tale in deep-sea habitats in the Gulf of Cadiz (NE Atlantic)
Génio, Luciana; Warén, Anders; Matos, Fábio Lopes; Cunha, Maria Marina Pais Ribeiro daBridging the Atlantic and Mediterranean continental margins, the South Iberian region has recently been the focus for geological and biological investigations. In this region, the Gulf of Cadiz (GoC) encompasses a great variety of deep-sea habitats that harbour highly diverse biological communities. In this study, we describe the composition of gastropod assemblages obtained from in situ colonization experiment...
A complex picture of associations between two host mussels and symbiotic bacter...
Rodrigues, Clara F.; Cunha, Marina R.; Génio, Luciana; Duperron, SébastienAmong chemosymbiotic metazoans found at deep-sea hydrothermal vents, cold seeps and organic falls, members of the mussel clade Bathymodiolinae (Bivalvia: Mytilidae) have evolved interactions with a higher diversity of bacterial lineages than other bivalve groups. Here, we characterized the bacteria associated with "Bathymodiolus" mauritanicus and Idas-like specimens from three sites in the Northeast Atlantic (t...