@article{fdi:010066995, title = {{H}ow did the ultramafic soils shape the flora of the {N}ew {C}aledonian hotspot ?}, author = {{I}snard, {S}andrine and {L}'{H}uillier, {L}. and {R}igault, {F}r{\'e}d{\'e}ric and {J}affr{\'e}, {T}anguy}, editor = {}, language = {{ENG}}, abstract = {{N}ew {C}aledonia is renowned as one of the world's most significant biodiversity hotpots. {T}he nutrient-deficiency and cations imbalances of ultramafic soils, which cover a third of the island, harbor a disproportionally high proportion of the plant diversity and endemism of {N}ew {C}aledonia. {T}his review explores how ultramafic soils have influenced the exceptional endemism and richness of {N}ew {C}aledonia trough the concomitant occurrences of habitat patchiness, climatic instability, environmental gradient, and edaphic heterogeneity of ultramafic soils. {W}e focus on the unique 'maquis' vegetation where selective pressures by nutrient deficiency and trace element surplus are at their acme. {W}e aim to synthesize our current understanding of diversification and speciation of lineages that have been phylogenetically studied to date. {F}ragmentation of the peridotite mantle in isolated massifs, and as such spatial heterogeneity of ultramafic soils types, appear to promote plant endemism and speciation. {R}epeated independent dispersal events of pre-adapted species and persistence of paleo-endemic lineages have contributed to the phylogenetic diversity and the endemism of the ultramafic flora. {F}inally, historical climatic instability has caused shifts of rain forest species in refugia thereby favoring the extension of maquis species.}, keywords = {{D}iversification ; {E}ndemism ; {F}orests ; {H}arsh edaphic conditions ; {M}aquis ; {N}utritional strategies ; {P}readaptation ; {S}pecies richness ; {NOUVELLE} {CALEDONIE}}, booktitle = {}, journal = {{P}lant and {S}oil}, volume = {403}, numero = {1-2}, pages = {53--76}, ISSN = {0032-079{X}}, year = {2016}, DOI = {10.1007/s11104-016-2910-5}, URL = {https://www.documentation.ird.fr/hor/fdi:010066995}, }