PhD Thesis Presentation

Characterization of Intertidal Vegetation on European Coasts Using MultiScale Remote Sensing in Response to Natural and Anthropogenic Pressures

The 15th of May 2025

Thesis supervisor:

Laurent Barillé, Professor

Co-supervisor:

Pierre Gernez, Lecturer

Jury members:

Antoine Collin

Rodney Forster

Evangelos Spyrakos

Bárbara Ondiviela

Federica Braga

Laurent Barillé

Pierre Gernez

Lecturer

Professor

Professor

Senior scientist

Senior Researcher

Professor

Lecturer

École Pratique des Hautes Études (EPHE), Dinard, France

University of Hull, United Kingdom

University of Stirling, United Kingdom

Universidad de Cantabria, Spain

CNR-ISMAR, Venice, Italy

Nantes Université, France

Nantes Université, France

Simon Oiry

Preface

• thesis took place in ISOMER Nantes between 2021 and 2024
• It has been found by the french government blabla
• It was closely related to a ESA founded project called BiCOME

Table of Contents

Introduction

• Blabla coastal
• Blabla vegetation
• Blabla Intertidal
• Blabla remote sensing
• Blabla PhD objectives

Developing Advanced Methodologies for Intertidal Vegetation Monitoring

• From Field Spectroscopy to Remote Sensors. Bede paper
• Develpment of an algorithm to classify intertidal vegetation (DISCOV, open source, easy to update to different use cases)

Case Study 1 – Facing Biological Invasions

• Introduction of the problem (Gracilaria, aquaculture, why studying it ? )
• Mapping the algae, over space and time, with key factor influencing its distribution
• Implication for Management

Case Study 2 – Mapping the impact of Heatwaves on intertidal seagrasses

• Introduction (Seagrasses quickly, heatwaves mainly)
• Experiment
• Satellite observation
• Ecological consequences

Discussion and Overview

• Duality Drone and Satellite (Strength, weaknesses, complementary of methods)
• Remote sensing for coastal ecosystem Management
• Future direction (RS for aquaculture, penology, restoration…)