Christian Jost

Christian Jost
Ecole Pratique des Hautes Etudes | EPHE · CRIOBE - Centre de Recherche Insulaire et Observatoire de l’Environnement

HDR, PhD, DEA, MSc

About

54
Publications
12,379
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
157
Citations
Citations since 2016
19 Research Items
91 Citations
20162017201820192020202120220510152025
20162017201820192020202120220510152025
20162017201820192020202120220510152025
20162017201820192020202120220510152025
Additional affiliations
September 2018 - present
University of Lorraine
Position
  • Professor Emeritus
June 2012 - June 2014
University of French Polynesia
Position
  • Dean of the LLSH Departement
September 2011 - August 2018
University of French Polynesia
Position
  • Professor (Full)

Publications

Publications (54)
Book
Full-text available
Philippe FOLLIOT, spécialiste des questions marines et ultramarines, seul parlementaire à avoir foulé le sol de La Passion-Clipperton et Christian JOST, spécialiste de La Passion-Clipperton, professeur émérite et chercheur au Centre de Recherches Insulaires et Observatoire de l'Environnement (CRIOBE), ont uni leurs forces et leur convictions pour p...
Article
Full-text available
Clipperton Atoll (Île de La Passion) is the only atoll in the Tropical Eastern Pacific (TEP) ecoregion and, owing to its isolation, possesses several endemic species and is likely an important stepping stone between Oceania, the remainder of the TEP, including other oceanic islands and the west coast of Central America. We describe the biodiversity...
Article
Full-text available
The terrestrial flora and vegetation of Clipperton (La Passion) atoll, a very remote and small (170 ha of land) French island located in the North-Eastern Pacific Ocean, at ca. 1,000 km west of the Mexican coast, have dramatically changed during the past three centuries. This paper, based on historical testimonies, previously published floristic st...
Technical Report
Full-text available
Synthesis of the scientific research programmes that were implemented during the 2017 mission to Clipperton-La Passion island in the Eastern Tropical Pacific.
Book
Full-text available
Une des dernières « île déserte » au monde est française. Abandonné, sacrifi é, le 4 ème territoire de « l'archipel France », le seul dans le Pacifi que Nord, La Passion-Clipperton dispose d'un domaine maritime (Zone Economique Exclusive) de 436 000 km² supérieur à celui de l'Hexagone (349 000 km², Corse comprise !) totalement délaissé et scandaleu...
Article
Full-text available
Le séisme politique qui a touché le pays et les dernières élections qui ont porté M. Charlot Salwaï, francophone, au poste de Premier ministre, accompagnent une économie en récession et semblent faire écho aux séismes, cyclones et catastrophes naturelles qui ont frappé l’archipel.
Chapter
Full-text available
The Marquesas Islands, the object of much attention, are characterized primarily by their isolation: isolation in the greater Pacific, isolation and originality in the heart of the Polynesian triangle, but also the isolation and remoteness of the islands, with enclaved valleys within the archipelago. Indeed, the issue of disenclaving has been the p...
Technical Report
Full-text available
National Geographic’s Pristine Seas Project, in collaboration with the Government of France conducted a 16-day expedition to Île de la Passion (Clipperton Atoll) in March 2016 to conduct comprehensive quantitative surveys of the health of its largely unknown marine environment, and produce a documentary film to highlight this unique ecosystem. Whil...
Chapter
Full-text available
Cette contribution dépasse le seul cadre de l'impact de l'exploitation minière sur les écosystèmes pour prendre en compte les imbrications et interactions entre les dimensions sociales et environnementales. Il s'agit in fine d'inscrire l'enjeu de l'exploitation des ressources minérales sous-marines dans un cadre politique plus large qui intègre de...
Book
La Polynésie française se caractérise par une immense zone économique exclusive, constituant la moitié de la zone maritime française, elle-même deuxième mondiale. Les enjeux de conservation et d'exploitation durable des océans et des ressources marines (objectif 14 de l'agenda onusien du développement durable) y sont considérables. Dans un contexte...
Book
Full-text available
La Polynésie française se caractérise par une immense zone économique exclusive, constituant la moitié de la zone maritime française, elle-même deuxième mondiale. Les enjeux de conservation et d'exploitation durable des océans et des ressources marines (objectif 14 de l'agenda onusien du développement durable) y sont considérables. Dans un contexte...
Book
Full-text available
La Polynésie française se caractérise par une immense zone économique exclusive, constituant la moitié de la zone maritime française, elle-même deuxième mondiale. Les enjeux de conservation et d'exploitation durable des océans et des ressources marines (objectif 14 de l'agenda onusien du développement durable) y sont considérables. Dans un contexte...
Conference Paper
Full-text available
France, océan Pacifique. « Ile des extrêmes », comme la décrit Christian Jost qui l'étudie depuis vingt ans, « île de La Passion » comme baptisée par ses découvreurs français, île des oubliés ou encore île de la désolation, Clipperton est aujourd'hui une île sentinelle des changements de notre planète. Malgré son isolement total, elle est témoin et...
Poster
Full-text available
Study of the topography and geomorphology of the atoll
Conference Paper
Full-text available
Geosystemic approach of New Caledonia territory based on ecosystems and anthroposystems combination in order to propose a new territorial cutting and planning for a better development at 2025 horizon.
Article
Full-text available
In 2008 a vast consultation was launched in New Caledonia aimed at establishing a development plan for the territory, directed at the year 2025. If the Caledonian economy has experienced high growth over the past decade, thereby satisfying population and investment needs, the current challenge resides in the capacity to build the society of the fut...
Article
Full-text available
Par ses possessions outre-mer, la France est présente dans les cinq océans. Dans l'immense Pacifique nord-oriental, de l'équateur à plus de 45°N, et entre l'archipel d'Hawaï à l'Ouest et les côtes américaines à l'Est, la France est même la seule nation à être présente, du fait de sa souveraineté sur l'unique terre émergée à plus de 210 milles nauti...
Article
Full-text available
L'applicabilité des principes du développement durable se heurte non seulement à la complexité des interactions des systèmes géographiques complexes à de multiples niveaux scalaires, mais aussi aux systèmes de gouvernance top-down des grandes agences de développement et bailleurs de fonds dont les décisions sont par trop souvent même contre-product...
Conference Paper
Full-text available
Sur deux des cent trente quatre îles françaises du Pacifique, l’île haute habitée de Futuna et l’atoll désertique de Clipperton, les écosystèmes terrestres se dégradent de façon préoccupante et les risques naturels sont majeurs. Mais si sur l’atoll de Clipperton, la désertification, dont sont responsables des millions de crabes terrestres, semble ê...
Article
Full-text available
Clipperton Atoll is one of the most isolated tropical island in the world and the only atoll of the eastern Pacific. Its outer slopes also make the largest coral reef of this region. Clipperton is a remarkable site for the geochemistry of its closed eutrophic stratified lagoon, the influence of both tropical eastern Pacific and Oceania gene pool on...
Article
Full-text available
High islands exposed to major natural hazards (earthquake, tsunami, cyclone), the Horn islands of Futuna and Alofi offer little protection to the inhabitants settled on the narrow coastal fringe with no protecting reef barrier. But part of the population is recently engaged in an effort to valorise the highlands in order to get protection against h...
Article
Full-text available
Clipperton Atoll is one of the most isolated tropical island in the world and the only atoll of the eastern Pacific. Its outer slopes also make the largest coral reef of this region. Clipperton is a remarkable site for the geochemistry of its closed eutrophic stratified lagoon, the influence of both tropical eastern Pacific and Oceania gene pool on...
Thesis
Full-text available
Through a general geosystemic approach involving physical, human, and even institutional diagnostics of the state of "health" of various tropical environments in Africa, India and Pacific islands, the author identify and spatialize the environmental constraints, before seeking solutions and corrections of imbalances, then propose to policy makers,...
Thesis
Full-text available
La démarche générale passe de diagnostics de l’état « de santé » de paysages et de milieux tropicaux, pour identifier ensuite et spatialiser les contraintes environnementales, rechercher des solutions et des aménagements correctifs des déséquilibres, et proposer, aux décideurs et aux élus, des scénarios et/ou des outils supports de décisions en mat...
Article
Full-text available
Yet Clipperton Island has been discovered and baptised Île de La Passion» by its French discoverors in 1711, its name is the one of a british pirate. Despite its short periods of occupation at the beginning of the 20th century and during the sixties, its history is ponctuated with numerous written works. Its high interest for environmental studies,...
Article
Full-text available
On the uninhabited atoll of Clipperton, the fourth French Pacific territory, the land and lagoon ecosystems are in drastic degradation while natural hazards are severe. Since the sixties, occurred a desertification process due apparently to the elimination of pigs introduced by the end of the 19th century, and consequently to the proliferation of m...
Article
On the uninhabited atoll of Clipperton, the fourth French Pacific territory, the land and lagoon ecosystems are in drastic degradation while natural hazards are severe. Since the sixties, occurred a desertification process due apparently to the elimination of pigs introduced by the end of the 19th century, and consequently to the proliferation of m...
Article
Full-text available
Article
Full-text available
Article
Full-text available
Il est désormais reconnu que l’atoll, île d’origine animale puisqu’elle a été construite pas des médrapores, les coraux, est un véritable miracle de la nature, mais aussi l’un des écosystèmes les plus fragiles des latitudes tropicales de notre planète, un écosystème en équilibre précaire où une modification apparemment insignifiante peut à la long...
Conference Paper
Full-text available
Thirty years ago, the Island of Passion, alias Clipperton-though it is the only atoll in the northeast Pacific-still offered an ecosystem that looked similar to those found in the other uninhabited Pacific atolls. Yet, the diversity of its fauna and flora was comparatively limited owing to its isolation and its small land extension (2 km²). Human o...
Article
Full-text available
Un prototype de système d'aide à la décision en gestion de l'environnement, aménagement et développement basé sur le concept ADAGE, a été développé et appliqué pour la première fois en 1999/2000 en Nouvelle Calédonie pour la gestion durable de la ressource en eau de l'atoll soulevé de Lifou (1 196 km², 10 000 habitants). Le système a été développé...
Article
Full-text available
ADAGE 1 is an innovate program for decision support in environmental development and management developed since 1996. Based on the fact that the scientific expertise does not have a vocation to give the answers to the problems posed by the decision maker, representing the civil society, ADAGE was developed on the idea of implementing data and exper...
Article
Full-text available
The launching of a new INCO Project for mining nickel-bearing laterites in the South of New Caledonia has just been announced. This paper presents the second part of the study of the environmental impact of the Project, and the way it is perceived by the two population groups using the zone : the resident Kanak population and the ecotourists and ho...
Article
The Susa catchment, 176 km², has been taken as an example and investigated using a combination of discharge measurements and interviews of the residents. The regime of the contributing torrents varies widely according to lithology. Nevertheless, if the shallow weathering of recent lava flows enhances torrentiality, this one results mainly from defo...
Article
Full-text available
Clipperton Atoll is one of the most isolated tropical island in the world and the only atoll of the eastern Pacific. Its outer slopes also make the largest coral reef of this region. Clipperton is a remarkable site for the geochemistry of its closed eutrophic stratified lagoon, the influence of both tropical eastern Pacific and Oceania gene pool on...

Network

Cited By

Projects

Project (1)
Project
Working to settle a french scientific station open to international scientists and to create a marine protected area around this unique atoll.