@inproceedings{fdi:010005645, title = {{F}loristic diversity of forests on ultramafic rocks of {N}ew {C}aledonia}, author = {{J}affr{\'e}, {T}anguy and {V}eillon, {J}ean-{M}arie and {P}intaud, {J}.{C}.}, editor = {}, language = {{ENG}}, abstract = {{T}he flora of dense humid forests on ultramafic rocks is compared with that over acidic and over calcareous rocks. {T}he flora of forests on ultramafic rocks (1361 species belonging to 400 genera in 118 families) is as rich in species but a little less diversified in genera and families, than the flora over acidic rocks (1370 species distributed among 430 genera and 128 families). {I}t is in contrast significantly more diversified than forest floras over calcareous rocks that cover a smaller area. {S}pecies associated with a specific forest type are more numerous on ultramafites than on acidic rocks and the genera are equal in number in both cases. {G}ymnosperms with 31 species of which 19 are strictly associated with ultramafic rocks, have their greatest importance with this type of substrate. {T}he reverse is true for the {P}teridophytes. {T}he total number of {A}ngiosperms is approximately the same for both ultramafic and acidic rocks, but is very variable according to families. {T}hus, 33 {A}ngiosperms have a greater importance in the former rock type, 36 in the latter, and 33 are equally important in both. {W}ith exception of the {G}ymnosperms that are more numerous over ultramafic rocks, taxa representative of the antiquity of the {N}ew {C}aledonian flora have a similar importance in the two main types of forest. {N}evertheless, the families #{P}hellinaceae$, #{B}alanopaceae$, #{S}phenostemonaceae$, #{O}ncothecaceae$, and #{S}trasburgeriaceae$ are better represented in forest over ultramafic rocks. {T}he #{M}onimiaceae$, #{A}mborellaceae$, and #{T}rimeniaceae$ are more important in forest over acidic rocks. {T}he flora of forests over ultramafites is equally well distinguished from that over acidic rocks by a greater number of species in the #{E}uphorbiaceae$, #{M}yrtaceae$, #{S}antalaceae$, #{E}pacridaceae$, #{F}agaceae$, and #{C}asuarinaceae$. ({R}{\'e}sum{\'e} d'auteur)}, keywords = {{FLORE} ; {FORET} {DENSE} ; {ROCHE} {ULTRABASIQUE} ; {ROCHE} {ACIDE} ; {ROCHE} {CARBONATEE} ; {ETUDE} {COMPARATIVE} ; {TAXONOMIE} ; {ENDEMIE} ; {STRUCTURE} {DU} {PEUPLEMENT} ; {NOUVELLE} {CALEDONIE}}, numero = {}, pages = {22}, booktitle = {{D}euxi{\`e}me conf{\'e}rence internationale sur l'{\'e}cologie des milieux serpentiniques, {N}oum{\'e}a, 31 juillet-5 août 1995 : r{\'e}sum{\'e}s = {S}econd international conference on serpentine ecology, {N}oumea, july 31-august 5, 1995 : abstracts}, year = {1995}, URL = {https://www.documentation.ird.fr/hor/fdi:010005645}, }