The design goal is to propose future utilisation of large former industrial site containing heterogeneous set of manufacturing, service and dwelling buildings of different age and qualities. Also the site is heterogeneous itself – the old industrial grounds which are quite well maintained and long-term used apart from the new part – which has been conquered in hurry in the 60’ and now quickly disappearing in birch succession forest. The difference is reflected not only in site use design, but also in architectural solution of singular buildings. Buildings in the old part serv to the needs of Museum and its further activities and reacts to the style defined by Lichtenstein period architecture – power station and steam plant. Different pattern of each building aimed to utilization of the full building renovation approaches spectrum, ranging from steam plant conservation to analogical installation in the power plant to analogical reconstruction od wooden floor of the old furnance. Question of use and design of the blast furnances is far more complex and became the main topic of this work. The furnance approaches much more the LTO area than building one. It includes only two standard building spaces (threshers), the rest is taken by machinery or closed and inaccessible. The building character predestinates the furnances to become a archeologized monument. The design goal was to use the time still remaining for this unique structure with the intensity possible from the safety and functioning views. In the first stage, the furnance will house a community of artists, other creative or interested people functionally parallel to Cartuzian order monasteries. The housing units will be built in the powdery reservoirs, the common rooms in the threshers. A parallel to the chapel will be the furnance base – being accessible to the public. Every reservoir unit consists of two containers, winter garden and own garden space, every one is a miniature, but fully self sufficient unit surrounded by its own little universe, as the Cartusian idea requires. The main construction used will be the shipping containers, adapted for dwelling, put on suspended “cradles”. The unused rest of the reservoir space will be used as gigantic flower pot. In time, the roles of the spaces will change. The communication spaces of the former community house will become the only access to the furnance spaces and the corridor will remain half open as a view platform.

Acacia spirorbis est une espèce endémique de la Nouvelle-Calédonie, capable de former des symbioses avec des microorganismes du sol, notamment des ectomycorhizes et de se développer sur une très large variété de sols. Afin de tester les capacités de cette espèce à permettre d’initier un processus de restauration écologique des écosystèmes dégradés par l’exploitation minière, un essai en pépinière et trois essais sur le terrain ont été mis en place. Ces essais ont permis de mettre en évidence la capacité d’A. spirorbis à jouer, grâce à la facilitation, un rôle de plante nurse pour des espèces cibles de la restauration écologique comme des espèces du genre Tristaniopsis. Ainsi, nous avons tout d’abord décrit la diversité des champignons ectomycorhiziens associés avec A. spirorbis puis, nous avons constatés leur capacité à s’associer sur le terrain aux Tristaniopsis grâce à la présence initiale d’A. spirorbis. Les capacités d’A. spirorbis à faciliter l’implantation d’autres espèces en améliorant leur survie, leur croissance et en leur permettant de disposer de partenaires fongiques ectomycorhiziens diversifiés sont décrites. Ces résultats on conduit à proposer un itinéraire technique de restauration écologique des maquis miniers dégradés, itinéraire fondés sur la facilitation entre espèce utilisant A. spirorbis comme plante nurse. / Acacia spirorbis is an endemic species of New Caledonia, capable of forming symbiosis with soil micro-organisms, including ectomycorrhizae and developing on a very wide variety of soils. In order to test the capacities of this species to initiate a process of ecological restoration of ecosystems degraded by mining activities, a nursery trial and three field trials were setted up. These trials highlight the ability of A. spirorbis to play, through facilitation, a nurse plant role for target species of the genus Tristaniopsis in the frame of ecological restoration processes. Thus, we first described the diversity of the ectomycorrhizal fungi associated with A. spirorbis and then we described their ability to associate in the field with Tristaniopsis thanks to the initial presence of A. spirorbis. The capacities of A. spirorbis to facilitate the implantation of other target species by improving their survival, growth and allowing them to access to a diversified range of ectomycorrhizal fungal partners are described. These results led to propose a technical itinerary for ecological restoration of degraded mining maquis, an itinerary based on facilitation between species using A. spirorbis as a nurse plant.