Observatoire de l'environnement Nouvelle Calédonie

Il y a environ 1424 résultats pour les termes de recherche: changement climatique

Affichage des résultats: 631 à 640

h

h

Rainforest and savanna landscape dynamics in New Caledonia : towards a mosaic of stable rainforest and savanna states ?

Stable forested environments can be converted to savanna in response to changes in environmental disturbances. New Caledonia is a biodiversity hotspot; significant ecological and economic resources would be lost if forests were turned into savanna by...

Old lineage on an old island : Pixibinthus, a new cricket genus endemic to New Caledonia shed light on gryllid diversification in a hotspot of biodive...

Few studies have focused on the early colonization of New Caledonia by insects, after the re-emergence of the main island, 37 Myr ago. Here we investigate the mode and tempo of evolution of a new endemic cricket genus, Pixibinthus, recently discovere...

Community variation in wood density along a bioclimatic gradient on a hyper-diverse tropical island

Aims: Analyse the controversial relationship existing between wood density, precipitation, temperature and aridity, and its importance in shaping forest communities facing drought. Location: New Caledonia (SW Pacific). Methods: We sampled wood densit...

Quelle influence des symbioses mycorhiziennes et des traits racinaires sur l'érosion des sols tropicaux ? Application à la restauration écologique ...

Les écosystèmes forestiers tropicaux représentent près de la moitié de la superficie forestière mondiale. Ces écosystèmes qui fournissent des services fondamentaux pour le bienêtre de nos sociétés (e.g. régulation des flux de matières, m...

Disentangling the processes driving tree community assembly in a tropical biodiversity hotspot (New Caledonia)

Aim: Understanding the drivers of community diversity and composition is a major question in ecology, which is of particular significance for the conservation of narrowly distributed taxa facing habitat alteration. In this study, we examined three ec...

Potential of high-throughput eDNA sequencing of soil fungi and bacteria for monitoring ecological restoration in ultramafic substrates: The case study...

Due to their central role in ecosystems functioning and their ability to rapidly respond to environmental changes, soil microorganisms could potentially be used for monitoring ecosystems recovery in the context of degraded land restoration. However, ...

Diversité structurale des forêts denses humides de la Province Nord de Nouvelle-Calédonie: de l'arbre au paysage

Dans le contexte des changements globaux, il est primordial de mettre au point des pratiques de gestion durable des forêts tropicales assurant le maintien de services environnementaux clés (e.g., biodiversité, stockage de carbone) et la production...

Ecology, forms and functions of the basal angiosperms from New Caledonia

One of the remarkable characteristics of the New Caledonian flora is the presence of numerous angiosperm lineages recognized as the earliest divergences of the flowering plants, due to their phylogenetic positions. Within these lineages, some species...

Enhancement of coral calcification via the interplay of nickel and urease

Corals are the main reef builders through the formation of calcium carbonate skeletons. In recent decades, coral calcification has however been impacted by many global (climate change) and local stressors (such as destructive fishing practices and ch...

Disentangling the processes driving tree community assembly in a tropical biodiversity hotspot (New Caledonia)

Aim Understanding the drivers of community diversity and composition is a major question in ecology, which is of particular significance for the conservation of narrowly distributed taxa facing habitat alteration. In this study, we examined three eco...