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Erwann Legrand

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Researcher
Telephone: 90517348

I am a marine ecologist specializing in the impacts of human activities on benthic ecosystems. My research mainly focuses on how aquaculture affects sensitive coastal and deep-sea species and habitats (e.g. coralline algal beds; cold-water corals), using field surveys, experimental work, and long-term monitoring. I’m also involved in supporting sustainable aquaculture development abroad by improving and sharing environmental monitoring protocols. Another key part of my research looks at the spread and ecological impacts of non-indigenous marine species in Norway.

Subjectarea

Subjectarea

 
Curriculum Vitae

Curriculum Vitae

2022-              Researcher - Institute of Marine Research (IMR), Benthic Resources and processes, Bergen, Norway.

2019-2022      Post-doc researcher - Institute of Marine Research (IMR), Bergen, Norway. Impact of salmon fish farms on the structure and the functioning of maerl beds.

2014-2017      Ph.D. research project  - Laboratory Adaptation and diversity in the marine environment – Biological Station of Roscoff, France. Impact of ocean acidification and warming on the diversity and the functioning of two coastal communities associated with macroalgae: maerl beds and intertidal rock pools

2012-2014      Master thesis - Laboratoire Environnement Profond – IFREMER, Plouzané, France. Integrated study of the structure of faunal communities associated with Bathymodiolus azoricus assemblages of Lucky Strike and Menez Gwen hydrothermal vents, mid-Atlantic ridge. 

Publications

Publications

Academic articles

2025

A Common Terminology to Unify Research and Conservation of Coralline Algae and the Habitats They Create

Victor L. Jardim, Jacques Grall, M. Beatriz Barros-Barreto, Anaëlle Bizien, Thomas Benoit, Juan C. Braga, Juliet Brodie, Thomas Burel, Andrea Cabrito, Guillermo Diaz-Pulido, Patrick Gagnon, Jason M. Hall-Spencer, Mathieu Helias, Paulo Antunes Horta, Siddhi Joshi, Nick A. Kamenos, Regina Kolzenburg, Erik C. Krieger, Erwann Legrand, Tessa M. Page, Viviana Peña, Federica Ragazzola, Lina M. Rasmusson, Francesco Rendina, Nadine Schubert, João Silva, Frederico T. S. Tâmega, Adeline Tauran, Heidi L. Burdett
Aquatic conservation 35
2025

In situ growth dynamics of the invasive ascidian Didemnum vexillum in Norway: Insights from a two-year monitoring study

Erwann Legrand, Øyvind Svensen, Vivian Husa, Yann Lelièvre, Rudolf Svensen
Marine Pollution Bulletin 211
2024

Efficacy of lime, hydrogen peroxide and azamethiphos as potential control treatments against the proliferation of the invasive ascidian Didemnum vexillum

Erwann Legrand, Rosa Helena Escobar Lux, Martin Mengede, Siri Aaserud Olsen, Aoife Elizabeth Parsons, Vivian Husa
Management of Biological Invasions 15 p. 169-186
2024

Salmon farming alters the structure and functioning of Norwegian maerl bed communities

Erwann Legrand, Bastien Taormina, Jacques Grall, Pål Næverlid Sævik, Yann Lelièvre, Lucas Pinsivy, Viviana Peña, Vivian Husa
Aquatic conservation 34
2024

Effects of aquaculture effluents on the slender sea pen Virgularia mirabilis

Bastien Taormina, Tina Kutti, Siri Aaserud Olsen, Pål Næverlid Sævik, Rita Hannisdal, Vivian Husa, Erwann Legrand
Scientific Reports 14
2024

Effects of the sea lice chemotherapeutant, emamectin benzoate, on metabolism and behaviour of the sea-pen Pennatula phosphorea

Bastien Taormina, Rosa Helena Escobar Lux, Erwann Legrand, Aoife Elizabeth Parsons, Tina Kutti, Vivian Husa, Rita Hannisdal, Ole Samuelsen, Ann-Lisbeth Agnalt
Marine Pollution Bulletin 198
2022

Fish farm effluents cause metabolic depression, reducing energy stores and growth in the reef-forming coral Lophelia pertusa

Tina Kutti, Erwann Legrand, Vivian Husa, Siri Aaserud Olsen, Øystein Hansgård Gjelsvik, Marcos Antonio Carvajalino-Fernandez, Ingrid Askeland Johnsen
Aquaculture Environment Interactions 14 p. 279-293
2022

Effect of sea lice chemotherapeutant hydrogen peroxide on the photosynthetic characteristics and bleaching of the coralline alga Lithothamnion soriferum

Erwann Legrand, Aoife Elizabeth Parsons, Rosa Escobar, Florian Freytet, Ann-Lisbeth Agnalt, Ole Bent Samuelsen, Vivian Husa
Aquatic Toxicology 247
2021

Lithothamnion (Hapalidiales, Rhodophyta) in the changing Arctic and Subarctic: DNA sequencing of type and recent specimens provides a systematics foundation

Viviana Peña, David Bélanger, Patrick Gagnon, Joseph L. Richards, Line Le Gall, Jeffery R. Hughey, Gary W. Saunders, Sandra C. Lindstrom, Eli Rinde, Vivian Husa, Hartvig C Christie, Stein Fredriksen, Jason M. Hall-Spencer, Robert S. Steneck, Kathryn M. Schoenrock, Janne Kim Gitmark, Ellen Sofie Grefsrud, Marc Anglès d'Auriac, Erwann Legrand, Jacques Grall, Thomas F. Mumford, Nicholas A. Kamenos, Paul W. Gabrielson
European journal of phycology 56 p. 468-493
2021

Reduced physiological performance in a free-living coralline alga induced by salmon faeces deposition

Erwann Legrand, Tina Kutti, Erika V. Gonzalez Casal, Samuel Rastrick, Sissel Andersen, Vivian Husa
Aquaculture Environment Interactions 13 p. 225-236
2020

Endogenous versus exogenous factors: What matters for vent mussel communities?

Jozée Sarrazin, Marie Portail, Erwann Legrand, Cécile Cathalot, Agathe Laës-Huon, Noé J. Lahaye, Pierre Marie Sarradin, Berengere Husson
Deep Sea Research Part I: Oceanographic Research Papers 160:103260 p. 1-19
2020

Using stable isotope analysis to determine the effects of ocean acidification and warming on trophic interactions in a maerl bed community

Erwann Legrand, Sophie Martin, Cédric Leroux, Pascal Riera
Marine Ecology 41

Reports and dissertations

2024

Identifying priorities for the protection of deep-sea species and habitats in the Nordic Seas

Erwann Legrand, Marion Boulard, Joe O'Connor, Tina Kutti
Rapport fra havforskningen
2023

Kartlegging av den fremmede marine arten havnespy Didemnum vexillum ved hjelp av miljø-DNA og visuell inspeksjon. Oppfølgende undersøkelser i 2022-23

Frode Fossøy, Vivian Husa, Ida Pernille Øystese Andersskog, Hege Brandsegg, Rolf Sivertsgård, Erwann Legrand, Øyvind Svensen, Lars Dahle Øverby, Even Husby
Net reports
News
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