ECOLAB > Agenda > Services écosystémiques rendus par le débit écologique dans un contexte global

Services écosystémiques rendus par le débit écologique dans un contexte global

Séminaire le 07 nov 2019 à 14h30
Amandine V. PASTOR

Ecology of environmental change, Faculdade de ciencias de Lisboa

 

Services écosystémiques rendus par le débit écologique dans un contexte global

 

Jeudi 07 novembre 2019, 14h30, Salle 701, Bât C, ENSAT

 

Amandine V. PASTOR

Faculdade de ciencias de Lisboa

 

 

The last decades, water for food demand, industry, and household has significantly increased at the expense of Environmental flow requirements (EFRs). These latter represent the « volume, timing and frequency of water required to sustain freshwater ecosystems and its livelihoods », it was defined in 1997 as the Brisbane Declaration and updated in 2018 in Brisbane. Today, within, the water-food-energy-environment nexus and the SDGs achievements, Integrated Assessment Models (IAMs) have been of great use to answer related research and societal issues. Previously, economic and land use allocation models were considering water availability as unlimited, but the last 10 years, progress has been done in the integration of water availability including EFRs in IAMs. However, there is still a lack of understanding of how to define EFRs at different ecoregions and why it is important to sustain EFRs within the climate urgency and Water-food-energy-environment nexus.

In the first part of my talk, I will present the different existing methodologies to calculate EFRs. Today, more than 200 EFRs methodologies exist, therefore, I will present them by category (hydrological to holistic methods) within different spatial scales. Then, I will present how we can integrate EFRs in IAMs, and finally, I will show some of my previous research outcomes on the water-food-environment nexus in the context of global change. The research outcomes include finding on the unsustainable use of irrigation water demand, the impact of food security if EFRs were implemented worldwide and how future land use may look like by 2050 by integrating EFRs.

In the second part of my talk, I will present the ecosystem services (ES) related to the implementation of EFRs and the benefits they can bring to nature and people. More particularly, I will focus on intermittent rivers (rivers flowing less than 6 months per year) because they are more vulnerable to disappear due to low monitoring and interests. I will present some previous work that was done within the SMIRES (Science and Management of Intermittent Rivers) Cost Action EU network from my colleagues and myself and how I would like to continue this work and investigate the related SE to EFRs.

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