Consulta: creatorFacets:"Nunes, Flavia"
Registros recuperados: 12
Data/hora: 29/05/2024 07:57:57

Lipid remodelling in the reef-building honeycomb worm, Sabellaria alveolata, reflects acclimation and local adaptation to temperature
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Muir, Anna; Nunes, Flavia; Dubois, Stanislas; Pernet, Fabrice.
Acclimation and adaptation, which are key to species survival in a changing climate, can be observed in terms of membrane lipid composition. Remodelling membrane lipids, via homeoviscous adaptation (HVA), counteracts membrane dysfunction due to temperature in poikilotherms. In order to assess the potential for acclimation and adaptation in the honeycomb worm, Sabellaria alveolata, a reef-building polychaete that supports high biodiversity, we carried out common-garden experiments using individuals from along its latitudinal range. Individuals were exposed to a stepwise temperature increase from 15 °C to 25 °C and membrane lipid composition assessed. Our results suggest that S. alveolata was able to acclimate to higher temperatures, as observed by a...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00354/46551/46361.pdf

Recifes Brasileiros: o Legado de Laborel
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Laborel-deguen, Francoise; Castro, Clovis B.; Nunes, Flavia; Pires, Debora O.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00588/70007/67922.pdf

Connecting organic to mineral: How the physiological state of an ecosystem-engineer is linked to its habitat structure
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Curd, Amelia; Pernet, Fabrice; Corporeau, Charlotte; Delisle, Lizenn; Firth, Louise B.; Nunes, Flavia; Dubois, Stanislas.
The honeycomb worm Sabellaria alveolata is capable of building extensive bioconstructions, including what are currently considered Europe’s largest biogenic reefs. The size and volume of these bioconstructions, however, vary greatly, such that not all habitats engineered by S. alveolata may be easily identified as reefs. Given that European environmental legislation protects marine habitats that are classified as “reefs”, it is important to identity a clear set of definition criteria. Furthermore, quantifiable and unequivocal criteria are also needed to evaluate the ecological (health) state of these reefs, in order to best monitor and protect them. Here we propose new terminology to describe the physical appearance of these bioconstructions and attempt to...
Tipo: Text
Palavras-chave: Biochemical indicators; Health; Ecological status; Sabellaria alveolata; Biogcnic reef; Engineer species.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00464/57608/60175.pdf

Musical Chairs on Temperate Reefs: Species Turnover and Replacement Within Functional Groups Explain Regional Diversity Variation in Assemblages Associated With Honeycomb Worms
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Muller, Alexandre; Poitrimol, Camille; Nunes, Flavia; Boye, Aurelien; Curd, Amelia; Desroy, Nicolas; Firth, Louise B; Bush, Laura; Davies, Andrew J; Lima, Fernando P; Marzloff, Martin; Meneghesso, Claudia; Seabra, Rui; Dubois, Stanislas.
Reef-building species are recognized as having an important ecological role and as generally enhancing the diversity of benthic organisms in marine habitats. However, although these ecosystem engineers have a facilitating role for some species, they may exclude or compete with others. The honeycomb worm Sabellaria alveolata (Linnaeus, 1767) is an important foundation species, commonly found from northwest Ireland to northern Mauritania, whose reef structures increase the physical complexity of the marine benthos, supporting high levels of biodiversity. Local patterns and regional differences in taxonomic and functional diversity were examined in honeycomb worm reefs from 10 sites along the northeastern Atlantic to explore variation in diversity across...
Tipo: Text
Palavras-chave: Biodiversity; Taxonomic diversity; Functional diversity; Ecosystem engineer; Reef; Turnover.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00693/80506/83709.pdf

Specific niche requirements underpin multidecadal range edge stability, but may introduce barriers for climate change adaptation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Firth, Louise B; Harris, Daniel; Blaze, Julie A; Marzloff, Martin; Boye, Aurelien; Miller, Peter I; Curd, Amelia; Vasquez, Mickael; Dunn, Julia D; O'Connor, Nessa E; Power, Anne-marie; Mieszkowska, Nova; O’riordan, Ruth M; Burrows, Michael T; Bricheno, Lucy M; Knights, Anthony M; Nunes, Flavia; Bordeyne, François; Bush, Laura E; Byers, James E; David, Carmen; Davies, Andrew J; Dubois, Stanislas; Edwards, Hugh; Foggo, Andy; Grant, Lisa; Mattias Green, Ja; Gribben, Paul E; Lima, Fernado P; Mcgrath, David; Noel, Laure Mlj; Seabra, Rui; Simkanin, Christina; Hawkins, Stephen J.
Aim To investigate some of the environmental variables underpinning the past and present distribution of an ecosystem engineer near its poleward range edge. Location &gt;500 locations spanning &gt;7,400 km around Ireland. Methods We collated past and present distribution records on a known climate change indicator, the reef‐forming worm Sabellaria alveolata (Linnaeus, 1767) in a biogeographic boundary region over 182 years (1836–2018). This included repeat sampling of 60 locations in the cooler 1950s and again in the warmer 2000s and 2010s. Using species distribution modelling, we identified some of the environmental drivers that likely underpin S. alveolata distribution towards the leading edge of its biogeographical range in Ireland. Results Through...
Tipo: Text
Palavras-chave: Biogenic habitat; Biogeography; Cold event; Irish Sea; Macroecology; Tidal front.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00677/78938/81316.pdf

Seascape genomics reveals population isolation in the reef-building honeycomb worm, Sabellaria alveolata (L.)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Muir, Anna P.; Dubois, Stanislas; Ross, Rebecca E.; Firth, Louise B.; Knights, Antony M.; Lima, Fernando P.; Seabra, Rui; Corre, Erwan; Le Corguillé, Gildas; Nunes, Flavia.
ackground Under the threat of climate change populations can disperse, acclimatise or evolve in order to avoid fitness loss. In light of this, it is important to understand neutral gene flow patterns as a measure of dispersal potential, but also adaptive genetic variation as a measure of evolutionary potential. In order to assess genetic variation and how this relates to environment in the honeycomb worm (Sabellaria alveolata (L.)), a reef-building polychaete that supports high biodiversity, we carried out RAD sequencing using individuals from along its complete latitudinal range. Patterns of neutral population genetic structure were compared to larval dispersal as predicted by ocean circulation modelling, and outlier analyses and genotype-environment...
Tipo: Text
Palavras-chave: RADseq; Ocean circulation modelling; Adaptation; Marine invertebrate; Larval dispersal.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00643/75538/76445.pdf

Non-additive effects of ocean acidification in combination with warming on the larval proteome of the Pacific oyster, Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Harney, Ewan; Artigaud, Sebastien; Le Souchu, Pierrick; Miner, Philippe; Corporeau, Charlotte; Essid, Hafida; Pichereau, Vianney; Nunes, Flavia.
Increasing atmospheric carbon dioxide results in ocean acidification and warming, significantly impacting marine invertebrate larvae development. We investigated how ocean acidification in combination with warming affected D-veliger larvae of the Pacific oyster Crassostrea gigas. Larvae were reared for 40 h under either control (pH 8.1, 20 °C), acidified (pH 7.9, 20 °C), warm (pH 8.1, 22 °C) or warm acidified (pH 7.9, 20 °C) conditions. Larvae in acidified conditions were significantly smaller than in the control, but warm acidified conditions mitigated negative effects on size, and increased calcification. A proteomic approach employing two-dimensional electrophoresis (2-DE) was used to quantify proteins and relate their abundance to phenotypic traits. In...
Tipo: Text
Palavras-chave: Crassostrea gigas; Ocean acidification; Larval development; ATP synthase; GAPDH; Superoxide dismutase.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00299/40985/40076.pdf

Contemporary and historical oceanographic processes explain genetic connectivity in a Southwestern Atlantic coral
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Peluso, L.; Tascheri, V.; Nunes, Flavia; Castro, C. B.; Pires, D. O.; Zilberberg, Carla.
Understanding connectivity patterns has implications for evolutionary and ecological processes, as well as for proper conservation strategies. This study examined population genetic structure and migration patterns of the coral Mussismilia hispida, one of the main reef builders in the Southwestern Atlantic Ocean. For this, 15 sites were sampled along its entire distributional range employing 10 microsatellite loci. M. hispida was divided into five genetically differentiated populations by Structure analysis. Population structure and migration estimates are consistent with present-day oceanographic current patterns, zones of upwelling and historical sea-level changes. The Central Region and Oceanic Islands populations had the highest genetic diversity, were...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00426/53725/54599.pdf

Immune priming and portal of entry effectors improve response to vibrio infection in a resistant population of the European abalone
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dubief, Bruno; Nunes, Flavia; Basuyaux, Olivier; Paillard, Christine.
Since 1997, populations of the European abalone Haliotis tuberculata suffer mass mortalities attributed to the bacterium Vibrio harveyi. These mortalities occur at the spawning season, when the abalone immune system is depressed, and when temperatures exceed 17 °C, leading to favorable conditions for V. harveyi proliferation. In order to identify mechanisms of disease resistance, experimental successive infections were carried out on two geographically distinct populations: one that has suffered recurrent mortalities (Saint-Malo) and one that has not been impacted by the disease (Molène). Furthermore, abalone surviving these two successive bacterial challenges and uninfected abalone were used for several post-infection analyses. The Saint-Malo population...
Tipo: Text
Palavras-chave: Immunity; Hemocyte; Abalone; Disease; Extracellular products; Immune priming; Vibrio harveyi; Flow cytometry; Resistance; Phagocytosis; Bacterial growth; QPCR; Gill.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00357/46800/46667.pdf

De novo assembly and annotation of the European abalone Haliotis tuberculata transcriptome
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Harney, Ewan; Dubief, Bruno; Boudry, Pierre; Basuyaux, Olivier; Schilhabel, Markus B.; Huchette, Sylvain; Paillard, Christine; Nunes, Flavia.
The European abalone Haliotis tuberculata is a delicacy and consequently a commercially valuable gastropod species. Aquaculture production and wild populations are subjected to multiple climate-associated stressors and anthropogenic pressures, including rising sea-surface temperatures, ocean acidification and an emerging pathogenic Vibrio infection. Transcript expression data provides a valuable resource for understanding abalone responses to variation in the biotic and abiotic environment. To generate an extensive transcriptome, we performed next-generation sequencing of RNA on larvae exposed to temperature and pH variation and on haemolymph of adults from two wild populations after experimental infection with Vibrio harveyi. We obtained more than 1.5...
Tipo: Text
Palavras-chave: RNA-Seq; Mollusca; Gastropoda; Development; Vibrio harveyi; Climate change.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00318/42940/45103.pdf

Phylogeography of the reef-building polychaetes of the genus     Phragmatopoma     in the western Atlantic Region
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nunes, Flavia; Van Wormhoudt, Alain; Faroni-perez, Larisse; Fournier, Jerome.
Aim  To verify the synonymy of the reef-building polychaete Phragmatopoma caudata (described for the Caribbean) and Phragmatopoma lapidosa (described for Brazil) using molecular data. To evaluate the patterns of genetic diversity and connectivity among populations from Florida to South Brazil. Location  Intertidal zone in the western Atlantic biogeographical Region: Brazil, eastern Caribbean and Florida (USA). Methods  DNA sequence data from one mitochondrial (cox-1) and one nuclear ribosomal (ITS-1) loci were obtained from 11 populations of P. caudata spanning the coasts of Brazil, eastern Caribbean and Florida. Phylogenetic relationships among populations of P. caudata and other members of the genus were inferred by Bayesian methods. Population...
Tipo: Text
Palavras-chave: Biogeographical barrier; Brazilian Province; Caribbean Province; Connectivity; Larval dispersal; Phragmatopoma caudata; Phylogenetics; Phylogeography; Polychaete reef; Western Atlantic Region.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00363/47376/47710.pdf

Biogeography of the endosymbiotic dinoflagellates (Symbiodiniaceae) community associated with the brooding coral Favia gravida in the Atlantic Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Teschima, Mariana M.; Garrido, Amana; Paris, Alexandra; Nunes, Flavia; Zilberberg, Carla.
Zooxanthellate corals live in symbiosis with phototrophic dinoflagellates of the family Symbiodiniaceae, enabling the host coral to dwell in shallow, nutrient-poor marine waters. The South Atlantic Ocean is characterized by low coral diversity with high levels of endemism. However, little is known about coral–dinoflagellate associations in the region. This study examined the diversity of Symbiodiniaceae associated with the scleractinian coral Favia gravida across its distributional range using the ITS-2 marker. This brooding coral endemic to the South Atlantic can be found across a wide range of latitudes and longitudes, including the Mid-Atlantic islands. Even though it occurs primarily in shallower environments, F. gravida is among the few coral species...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00484/59602/62612.pdf