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Date
Editeur
Auteur
Titre
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EN-7. Records of the biodiversity crisis
/ Université Paris I Panthéon-Sorbonne, UVED
/ 29-10-2014
/ Canal-u.fr
DAVID Bruno
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Voir le résumé
Bruno David comes back to the main biodiversity crisis. He focuses on 2 aspects : the crisis recording and the exit from the crisis. Firstly, he explains that, contrary to what can be supposed, there are only a little fossils in times of crisis. Secondly, he points out the variability of the healing duration. Mot(s) clés libre(s) : biodiversity, crisis, fossils
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EN-6. The main crisis of biodiversity
/ Université Paris I Panthéon-Sorbonne, UVED
/ 23-10-2014
/ Canal-u.fr
DAVID Bruno
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Voir le résumé
Bruno David comes back to the main biodiversity crisis. He takes an inventory of the crisis for hundreds of million years and he discusses their potential factors of origin : oxygenation of the marine environment, climate, volcanism, meteorites. To finish, he evokes the current situation and the risk of a sixth extinction crisis of biodiversity. Mot(s) clés libre(s) : biodiversity, crisis, volcanism, climate, meteorites
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EN-4. The biodiverisity of intermittent rivers
/ Université Paris I Panthéon-Sorbonne, UVED
/ 18-11-2014
/ Canal-u.fr
DATRY Thibault
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Voir le résumé
Thibault Datry presents the intermittent rivers, which punctually cease flowing or dry out. He shows the importance and the evolution of those ecosystems, and evidences their rich biodiversity. Mot(s) clés libre(s) : biodiversity, intermittent rivers
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EN-5. Overfishing and the impacts on biodiversity and on the functioning of ecosystems
/ Université Paris I Panthéon-Sorbonne, UVED
/ 27-11-2014
/ Canal-u.fr
Cury Philippe
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Voir le résumé
Philippe Cury explains how the overfishing affects the marine food webs, and he highlights some ecological consequences of this practice, like the jellyfishes proliferation or the disappearance of the predatory species of the sought species. Mot(s) clés libre(s) : stocks, biodiversity, productivity, overfishing, jellyfishes
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EN-11. The economics of marine resources and biodiversity
/ Université Paris I Panthéon-Sorbonne, UVED
/ 18-11-2014
/ Canal-u.fr
Chaboud Christian
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Voir le résumé
Christian Chaboud presents some models and issues related to the economic approach of fisheries and marine resources. He especially comes back to the Gordon Schaefer model, and to the economic assessment of the ecosystem services. Mot(s) clés libre(s) : Gordon-Schaefer, biodiversity, economy, fishery, marine resources, ecosystem services
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EN-8. Current state of the planet and of the biodiversity
/ Université Paris I Panthéon-Sorbonne, UVED
/ 16-10-2014
/ Canal-u.fr
BOEUF Gilles
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Voir le résumé
Gilles Boeuf reports the erosion of biodiversity and presents the four main factors which can be associated to this dynamics: destruction and pollution, resources overexploitation, species dissemination, climate change. Mot(s) clés libre(s) : biodiversity, crisis, climate, invasive species, overexploitation
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EN-5. The history of biodiversity
/ Université Paris I Panthéon-Sorbonne, UVED
/ 16-10-2014
/ Canal-u.fr
BOEUF Gilles
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Voir le résumé
Gilles Boeuf comes back to the main stages of the history of life. He begins with the oceans, where life appeared over 3,5 billion years ago, mentions the lands conquest, and ends with the appearance of human groups and the combined transformations. Mot(s) clés libre(s) : biodiversity
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EN-10. Why should we worry about biodiversity ?
/ Université Paris I Panthéon-Sorbonne, UVED
/ 16-10-2014
/ Canal-u.fr
BOEUF Gilles
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Voir le résumé
In relation to the erosion of biodiversity, Gilles Boeuf presents arguments in favor of the upholding of this biodiversity: human health, technology innovation, bio-inspiration, or economy. Mot(s) clés libre(s) : innovation, health, Bio-inspiration, biodiversity, economy
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EN-1. Definition of biodiversity
/ Université Paris I Panthéon-Sorbonne, UVED
/ 16-10-2014
/ Canal-u.fr
BOEUF Gilles
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Voir le résumé
Gilles Boeuf proposes a definition of the biodiversity, this "living fraction of the nature in all its complexity". He relies on many examples, pictures, samples, and always points out the strong connection between liquid water and life. Mot(s) clés libre(s) : biodiversity, definition, water
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Definition and lesson learned from the past crisis
/ Université Paris I Panthéon-Sorbonne, UVED
/ 16-02-2015
/ Canal-u.fr
BOEUF Gilles
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Voir le résumé
In this first part, discover what are the biodiversity, its origins 3,8 billion years ago, and its evolution mechanisms, especially the extinction crisis of the main species. You will better understand the current state of the biodiversity, and why it is important to preserve its dynamics. Mot(s) clés libre(s) : biodiversity, crisis
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