@article{fdi:010091108, title = {{L}eaf elemental composition of species growing on contrasting soils in two adjacent rainforests: {S}erpentinized ultramafic versus volcano-sedimentary rock}, author = {{J}affr{\'e}, {T}. and {I}snard, {S}andrine and {I}banez, {T}homas}, editor = {}, language = {{ENG}}, abstract = {{T}he flora of {N}ew {C}aledonia is renowned as one of the world's most significant biodiversity hotpots. {T}he contrasting soil conditions that characterize this small archipelago profoundly influence species local diversity and distribution. {B}ecause the difference between soil chemistry is likely to cause variation in leaf elemental composition, we wanted to test how different soil properties affect plant community and leaf elemental concentration. {W}e focused on two adjacent forests, of similar physiognomy, growing on serpentinite (ultramafic rock), and on volcano-sedimentary rock. {B}oth soils strongly differed in their p{H}, cation exchange capacity, and element concentration ({A}l, {M}n, and {N}i). {T}he two adjacent forests have a diverse endemic flora and share a relatively high proportion of species (35%-42%). {T}he tree composition differs more than the total vascular flora. {L}eaf element concentrations of 30 tree species that grow on both soil types, as well as the corresponding soil-plant-available nutrients, were analyzed. {L}eaf element concentrations indicated {N}, {P}, {K}, and {C}a deficiency. {D}espite higher plant-available {M}n concentration in ultramafic soil than volcano-sedimentary soil, leaf {M}n concentrations were significantly higher for plants growing on volcano-sedimentary soil. {L}eaf {N}i concentrations were higher on ultramafic soil and {A}l concentration was higher on volcano-sedimentary soil. {M}ajor differences in leaf elemental concentration were for micronutrients (metals) while macronutrients varied in much lower proportion between the two soil types, suggesting a tight regulation of macronutrients compared to micronutrients. {F}orests growing on adjacent serpentinized ultramafic rock and on siliceous volcano-sedimentary rock in {N}ew {C}aledonia both have a rich and diverse flora, and share a relatively high fraction of species (35%-42%). {M}ajor differences in leaf elemental concentration of species growing on both soils were for the micronutrients (metals) while macronutrients varied in much lower proportion between the two soil types, suggesting a tight regulation of macronutrients compared to micronutrients. image}, keywords = {leaf elemental composition ; metal ; {N}ew {C}aledonia ; rain forest ; ultramafic ; {NOUVELLE} {CALEDONIE}}, booktitle = {}, journal = {{E}cological {R}esearch}, volume = {39}, numero = {6}, pages = {852--861}, ISSN = {0912-3814}, year = {2024}, DOI = {10.1111/1440-1703.12508}, URL = {https://www.documentation.ird.fr/hor/fdi:010091108}, }