INTO THE MED: Searching for Microplastics from Space to Deep-Sea Catharina Pieper, Ana Martins, Erik Zettler, Clara Magalhães Loureiro, Victor Onink, Anu Heikkilä, Alexandre Epinoux, Ethan Edson, Vincenzo Donnarumma, Fons de Vogel, Kara Lavender Law, Linda Amaral-Zettler Springer Water, 2020
Importance of N2-fixation on the productivity at the north-western Azores current/front system, and the abundance of diazotrophic unicellular cyanobacteria Virginie Riou, Debany Fonseca-Batista, Arnout Roukaerts, Isabelle C. Biegala, Shree Ram Prakya, Clara Magalhães Loureiro, Mariana Santos, Angel E. Muniz-Piniella, Mara Schmiing, Marc Elskens, Natacha Brion, M. Ana Martins, Frank Dehairs Plos One, 2016 To understand the impact of the northwestern Azores Current Front (NW-AzC/AzF) system on HCO3−-and N2-fixation activities and unicellular diazotrophic cyanobacteria (UCYN) distribution, we combined geochemical and biological approaches from the oligotrophic surface to upper mesopelagic waters. N2-fixation was observed to sustain 45–85% of the HCO3−-fixation in the picoplanktonic fraction performing 47% of the total C-fixation at the deep chlorophyll maximum north and south of the AzF. N2-fixation rates as high as 10.9 μmol N m-3 d-1 and surface nitrate δ15N as low as 2.7‰ were found in the warm (18–24°C), most saline (36.5–37.0) and least productive waters south of the AzF, where UCYN were the least abundant. However, picoplanktonic UCYN abundances up to 55 cells mL-1 were found at 45–200m depths in the coolest nutrient-rich waters north of the AzF. In this area, N2-fixation rates up to 4.5 μmol N m-3 d-1 were detected, associated with depth-integrated H13CO3−-fixation rates at least 50% higher than observed south of the AzF. The numerous eddies generated at the NW-AzC/AzF seem to enhance exchanges of plankton between water masses, as well as vertical and horizontal diapycnal diffusion of nutrients, whose increase probably enhances the growth of diazotrophs and the productivity of C-fixers.
The ocean sampling day consortium Anna Kopf, Mesude Bicak, Renzo Kottmann, Julia Schnetzer, Ivaylo Kostadinov, Katja Lehmann, Antonio Fernandez-Guerra, Christian Jeanthon, Eyal Rahav, Matthias Ullrich, Antje Wichels, Gunnar Gerdts, Paraskevi Polymenakou, Giorgos Kotoulas, Rania Siam, Rehab Z Abdallah, Eva C Sonnenschein, Thierry Cariou, Fergal O’Gara, Stephen Jackson, Sandi Orlic, Michael Steinke, Julia Busch, Bernardo Duarte, Isabel Caçador, João Canning-Clode, Oleksandra Bobrova, Viggo Marteinsson, Eyjolfur Reynisson, Clara Magalhães Loureiro, Gian Marco Luna, Grazia Marina Quero, Carolin R Löscher, Anke Kremp, Marie E DeLorenzo, Lise Øvreås, Jennifer Tolman, Julie LaRoche, Antonella Penna, Marc Frischer, Timothy Davis, Barker Katherine, Christopher P Meyer, Sandra Ramos, Catarina Magalhães, Florence Jude-Lemeilleur, Ma Leopoldina Aguirre-Macedo, Shiao Wang, Nicole Poulton, Scott Jones, Rachel Collin, Jed A Fuhrman, Pascal Conan, Cecilia Alonso, Noga Stambler, Kelly Goodwin, Michael M Yakimov, Federico Baltar, Levente Bodrossy, Jodie Van De Kamp, Dion MF Frampton, Martin Ostrowski, Paul Van Ruth, Paul Malthouse, Simon Claus, Klaas Deneudt, Jonas Mortelmans, Sophie Pitois, David Wallom, Ian Salter, Rodrigo Costa, Declan C Schroeder, Mahrous M Kandil, Valentina Amaral, Florencia Biancalana, Rafael Santana, Maria Luiza Pedrotti, Takashi Yoshida, Hiroyuki Ogata, Tim Ingleton, Kate Munnik, Naiara Rodriguez-Ezpeleta, Veronique Berteaux-Lecellier, Patricia Wecker, Ibon Cancio, Daniel Vaulot, Christina Bienhold, Hassan Ghazal, Bouchra Chaouni, Soumya Essayeh, Sara Ettamimi, El Houcine Zaid, Noureddine Boukhatem, Abderrahim Bouali, Rajaa Chahboune, Said Barrijal, Mohammed Timinouni, Fatima El Otmani, Mohamed Bennani, Marianna Mea, Nadezhda Todorova, Ventzislav Karamfilov, Petra ten Hoopen, Guy Cochrane, Stephane L’Haridon, Kemal Can Bizsel, Alessandro Vezzi, Federico M Lauro, Patrick Martin, Rachelle M Jensen, Jamie Hinks, Susan Gebbels, Riccardo Rosselli, Fabio De Pascale, Riccardo Schiavon, Antonina dos Santos, Emilie Villar, Stéphane Pesant, Bruno Cataletto, Francesca Malfatti, Ranjith Edirisinghe, Jorge A Herrera Silveira, Michele Barbier, Valentina Turk, Tinkara Tinta, Wayne J Fuller, Ilkay Salihoglu, Nedime Serakinci, Mahmut Cerkez Ergoren, Eileen Bresnan, Juan Iriberri, Paul Anders Fronth Nyhus, Edvardsen Bente, Hans Erik Karlsen, Peter N Golyshin, Josep M Gasol, Snejana Moncheva, Nina Dzhembekova, Zackary Johnson, Christopher David Sinigalliano, Maribeth Louise Gidley, Adriana Zingone, Roberto Danovaro, George Tsiamis, Melody S Clark, Ana Cristina Costa, Monia El Bour, Ana M Martins, R Eric Collins, Anne-Lise Ducluzeau, Jonathan Martinez, Mark J Costello, Linda A Amaral-Zettler, Jack A Gilbert, Neil Davies, Dawn Field, Frank Oliver Glöckner Gigascience, 2015 Ocean Sampling Day was initiated by the EU-funded Micro B3 (Marine Microbial Biodiversity, Bioinformatics, Biotechnology) project to obtain a snapshot of the marine microbial biodiversity and function of the world's oceans. It is a simultaneous global mega-sequencing campaign aiming to generate the largest standardized microbial data set in a single day. This will be achievable only through the coordinated efforts of an Ocean Sampling Day Consortium, supportive partnerships and networks between sites. This commentary outlines the establishment, function and aims of the Consortium and describes our vision for a sustainable study of marine microbial communities and their embedded functional traits.
