21 documents found, page 1 of 3
A dataset of acoustic measurements from soundscapes collected worldwide during ...
Challéat, Samuel; Farrugia, Nicolas; Froidevaux, Jérémy S. P.; Gasc, Amandine; Pajusco, Nicolas; Abrahams, Carlos R.; Acevedo-Charry, OrlandoPolitical responses to the COVID-19 pandemic led to changes in city soundscapes around the globe. From March to October 2020, a consortium of 261 contributors from 35 countries brought together by the Silent Cities project built a unique soundscape recordings collection to report on local acoustic changes in urban areas. We present this collection here, along with metadata including observational descriptions o...
Vulnerable marine ecosystems survey pilot missions with EVA Hybrid AUV/ROV
Almeida, Carlos; Martins, Alfredo; Soares, Eduardo; Santos, A. Miguel P.; Matias, Bruno; Silva, Pedro; Pereira, Ricardo; Sytnyk, DenysFishing for deep-sea species occurs on continental slopes, ridges, and seamounts. Fishing operations using fishing gears that contact the bottom (e.g., trawls and bottom longlines) may have significant impacts on Vulnerable Marine Ecosystems (VMEs). VMEs refer to marine ecosystems with a population or community of sensitive taxa or habitats that are likely to experience substantial alteration from short-term to...
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...
Abyssal plain faunal carbon flows remain depressed 26 years after a simulated d...
Stratmann, Tanja; Lins, Lidia; Purser, Autun; Marcon, Yann; Rodrigues, Clara F.; Ravara, Ascensão; Cunha, Marina R.; Simon-Lledó, ErikFuture deep-sea mining for polymetallic nodules in abyssal plains will negatively impact the benthic ecosystem, but it is largely unclear whether this ecosystem will be able to recover from mining disturbance and if so, to what extent and at what timescale. During the “DISturbance and reCOLonization” (DISCOL) experiment, a total of 22% of the seafloor within a 10.8 km2 circular area of the nodulerich seafloor i...
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...
Fickle or faithful: the roles of host and environmental context in determining ...
Laming, Sven R.; Szafranski, Kamil M.; Rodrigues, Clara F.; Gaudron, Sylvie M.; Cunha, Marina R.; Hilário, Ana; Le Bris, Nadine; Duperron, SébastienThe Mediterranean Sea and adjoining East Atlantic Ocean host a diverse array of small-sized mussels that predominantly live on sunken, decomposing organic remains. At least two of these, Idas modiolaeformis and Idas simpsoni, are known to engage in gill-associated symbioses; however, the composition, diversity and variability of these symbioses with changing habitat and location is poorly defined. The current s...
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 ...
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...
The smaller vesicomyid bivalves in the genus Isorropodon (Bivalvia, Vesicomyida...
Rodrigues, Clara F.; Cunha, Marina R.; Olu, Karine; Duperron, SébastienSpecies of Isorropodon are vesicomyid bivalves for which little information is available regarding host phylogeny and bacterial symbioses. In this study we investigated the symbioses in three Isorropodon species from three cold seep areas: Isorropodon bigoti (Gulf of Guinea), Isorropodon megadesmus (Gulf of Cadiz) and Isorropodon perplexum (Eastern Mediterranean). Analysis of bacterial 16S ribosomal RNA gene se...