@article{fdi:010074385, title = {{E}ffects of elevated atmospheric {CO}2 and increased tidal flooding on leaf gas-exchange parameters of two common mangrove species : {A}vicennia marina and {R}hizophora stylosa}, author = {{J}acotot, {A}. and {M}archand, {C}yril and {G}ensous, {S}. and {A}llenbach, {M}.}, editor = {}, language = {{ENG}}, abstract = {{I}n this study, we examined interactive effects of elevated atmospheric {CO}2, concentrations, and increased tidal flooding on two mangroves species, {A}vicennia marina and {R}hizophora stylosa. {L}eaf gas-exchange parameters (photosynthesis, transpiration rates, water-use efficiency, stomatal conductance, and dark respiration rates) were measured monthly on more than 1000 two-year-old seedlings grown in greenhouses for 1year. {I}n addition, stomatal density and light curve responses were determined at the end of the experiment. {U}nder elevated {CO}2 concentrations (800ppm), the net photosynthetic rates were enhanced by more than 37% for {A}. marina and 45% for {R}. stylosa. {T}his effect was more pronounced during the warm season, suggesting that an increase in global temperatures would further enhance the photosynthetic response of the considered species. {T}ranspiration rates decreased by more than 15 and 8% for {A}. marina and {R}. stylosa, respectively. {C}onsequently, water-use efficiency increased by 76% and 98% for {A}. marina and {R}. stylosa, respectively, for both species, which will improve drought resistance. {T}hese responses to elevated {CO}2 were minimized (by 5%) with longer flooding duration. {C}onsequently, future increases of atmospheric {CO}2 may have a strong and positive effect on juveniles of {A}. marina and {R}. stylosa during the next century, which may not be suppressed by the augmentation of tidal flooding duration induced by sea-level rise. {I}t is possible that this effect will enhance seedling dynamic by increasing photosynthesis, and therefore will facilitate their settlements in new area, extending the role of mangrove ecosystems in carbon sequestration and climate change mitigation.}, keywords = {{M}angrove ; {CO}2 enrichment ; {P}hotosynthetic activity ; {S}tomatal density ; {C}limate change ; {S}ea-level rise ; {NOUVELLE} {CALEDONIE}}, booktitle = {}, journal = {{P}hotosynthesis {R}esearch}, volume = {138}, numero = {2}, pages = {249--260}, ISSN = {0166-8595}, year = {2018}, DOI = {10.1007/s11120-018-0570-4}, URL = {https://www.documentation.ird.fr/hor/fdi:010074385}, }