@article {9068, title = {Sargassum contamination and consequences for downstream uses: a review}, journal = {Journal of Applied Phycology}, volume = {33}, year = {2021}, month = {Jan-02-2021}, pages = {567 - 602}, issn = {0921-8971}, doi = {10.1007/s10811-020-02250-w}, url = {http://link.springer.com/10.1007/s10811-020-02250-w}, author = {Devault, Damien A. and Pierre, Ronan and Marfaing, H{\'e}l{\`e}ne and Dolique, Franck and Pascal Jean Lopez} } @article {8503, title = {Sargassum Differentially Shapes the Microbiota Composition and Diversity at Coastal Tide Sites and Inland Storage Sites on Caribbean Islands}, journal = {Front Microbiol}, volume = {12}, year = {2021}, month = {2021}, pages = {701155}, abstract = {

Rafts of drifting pelagic that are circulating across the Atlantic Ocean are complex ecosystems composed of a large number of associated species. Upon massive stranding, they lead to various socio-environmental issues including the inflow of contaminants and human health concerns. In this study, we used metabarcoding approaches to examine the differences in both the eukaryotic- and prokaryotic-associated communities from present in two islands of the Lesser Antilles, namely Guadeloupe and Martinique. We detected significant differences in microbial community structure and composition between landing , the surrounding seawater, and from inland storage sites. In total we identified 22,214 prokaryotic and 17,679 eukaryotic OTUs. Among them, functional prediction analyses revealed a number of prokaryotes that might contribute to organic matter decomposition, nitrogen cycling and gas production, including sulfate-reducing bacteria at coastal landing sites, and methanogenic archaea at inland storage sites. We also found that Metazoan was the most abundant group in samples, with nematode clades that presented exclusive or specific richness and abundance patterns depending on their substrate. Together, these molecular inventories of the micro- and meiofauna communities provide baseline information for further characterization of trophic interactions, algal organic matter decomposition and nutrient transfers at coastal and inland storage sites.

}, issn = {1664-302X}, doi = {10.3389/fmicb.2021.701155}, author = {Herv{\'e}, Vincent and Josie Lambourdi{\`e}re and Ren{\'e}-Trouillefou, Malika and Devault, Damien Alain and Pascal Jean Lopez} } @article {9067, title = {Sargassum Differentially Shapes the Microbiota Composition and Diversity at Coastal Tide Sites and Inland Storage Sites on Caribbean Islands}, journal = {Frontiers in Microbiology}, volume = {12}, year = {2021}, month = {May-10-2023}, doi = {10.3389/fmicb.2021.701155}, url = {https://www.frontiersin.org/articles/10.3389/fmicb.2021.701155/full}, author = {Herv{\'e}, Vincent and Lambourdi{\`e}re, Josie and Ren{\'e}-Trouillefou, Malika and Devault, Damien Alain and Pascal Jean Lopez} } @article {7636, title = {Singular physiological behavior of the scleractinian coral Porites astreoides in the dark phase}, journal = {Coral Reefs}, volume = {doi.org/10.1007/s00338-020-02023-4}, year = {2021}, month = {12/2020}, pages = {139-150}, abstract = {Unlike most other corals that have been declining since the 1980s, the population of Porites astreoides, one of the dominant species of coral in Caribbean reefs, appears to be resilient. We investigated the physiological regulation of the electron transport chain of Symbiodiniaceae chloroplasts during the light / dark transition in P. astreoides compared to nine other common scleractinian corals. Protocols were applied to coral samples in seawater tanks and in situ. The maximum quantum yield (Fv/Fm) in the dark and the effective photochemical efficiency (Fq{\textquoteright}/Fm{\textquoteright}) in the light were measured during light-dark transitions, and alternative electron flow (AEF) mechanisms were evaluated using fluorescence variation in response to serial irradiation pulses (SIP-protocol). The variation in Fv/Fm (ΔYIImax) was calculated after 3 min or 2 h of dark acclimation (ΔYIImax(2h); ΔYIImax(3min)). The three species that belong to the genus Porites (P. astreoides, P. divaricata, P. furcata) showed plastoquinone reduction (PQ) in response to the SIP protocol, unlike all the other species tested. A marked decrease in Fv/Fm (ΔYIImax(2h) = 47.79\%) was observed in P. astreoides in the dark whereas the average ΔYIImax(2h) of the other species tested was 0.677\%. The decrease in ΔYIImax in P. astreoides was due to a significant increase in Fo (ΔFo(2h) = -108.64\% {\textpm} SD 21.48) whereas Fm remained relatively stable. The increase in Fo was attributed to reduction of the PQ pool through a chlororespiration-like mechanism known to reduce the production of reactive oxygen species (ROS). This mechanism was triggered immediately after exposure to the dark, while a brief and moderate light exposure reversed it. Given the ecological success of P. astreoides, we suggest that the high antioxidant capability of this species in the dark phase could be one of the factors favoring its survival in the face of various environmental and anthropogenic threats.
\ }, keywords = {Caribbean reef corals, chlororespiration-like, PAM, resilience}, url = {https://link.springer.com/article/10.1007/s00338-020-02023-4}, author = {Pascal Claquin and Ren{\'e}-Trouillefou, Malika and Pascal Jean Lopez and Japaud, Aur{\'e}lien and Yolande Bouchon-Navaro and S{\'e}bastien Cordonnier and Claude Bouchon} } @article {5927, title = {Selectivity on epilithic diatom consumption for two tropical sympatric gobies: Sicydium punctatum (Perugia 1986) and Sicydium plumieri (Bloch 1786)}, journal = {Cybium }, volume = {42 }, year = {2018}, pages = {365-373}, abstract = {

\ Rivers of the Caribbean islands harbour a freshwater fauna mainly constituted of migrant diadromous species. In these hyperturbulent ecosystems, the primary producers are mostly represented by a thin epilithic biofilm, mainly composed of diatoms. Comparison of the diatoms available from the environment with the ones consumed and located in the digestive tracts of two gobiid fish, Sicydium punctatum Perugia, 1896 and Sicydium plumieri (Bloch, 1786) were made at twelve sampling locations, located upstream or downstream of six rivers, in Guadeloupe. One hundred and ninety-one epilithic diatom species were identified. A statistical approach was used to determine diatoms that best characterize the two species digestive tracts content (i.e. {\textquotedblleft}diagnostic species{\textquotedblright}) and to evaluate the statistical relationship between species abundances and groups of sites or conditions. Eight taxa belonging to five families were considered as significant diagnostic species of digestive tracts from fish collected upstream (Achnanthidium subhudsonis, Achnanthes rupestoides, Diadesmis contenta, Diadesmis sp., Eolimna sp., Navicula (dicta) seminulum, Navicula difficillima and Nupela sp.), and five taxa belonging to three families were considered as significant diagnostic species for fish collected downstream (Gomphonema parvulum, Navicula arvensis, Navicula cruxmeridionalis, Nitzschia frustulum and Navicula incarum). Results indicate selective consumption of epilithic diatoms by the two major fish observed in the mid and upper stream of Caribbean rivers

}, keywords = {Biofilm, Bioindication, Caribbean Islands, Gobiidae, Tropical rivers}, author = {Monti, Dominique and Lefran{\c c}ois, F and Clara Lord and Jean-Michel Mortillaro and Pascal Jean Lopez and Philippe Keith} }