@article{fdi:010053696,
  title = {{L}eaf functional response to increasing atmospheric {CO}2 concentrations over the last century in two northern {A}mazonian tree species: a historical delta {C}-13 and delta {O}-18 approach using herbarium samples},
  author = {{B}onal, {D}. and {P}onton, {S}. and {L}e {T}hiec, {D}. and {R}ichard, {B}. and {N}ingre, {N}. and {H}erault, {B}. and {O}gee, {J}. and {G}onzalez, {S}. and {P}ignal, {M}. and {S}abatier, {D}aniel and {G}uehl, {J}. {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e assessed the extent of recent environmental changes on leaf morphological (stomatal density, stomatal surface, leaf mass per unit area) and physiological traits (carbon isotope composition, delta {C}-13(leaf), and discrimination, {D}elta {C}-13(leaf), oxygen isotope composition, delta {O}-18(leaf)) of two tropical rainforest species ({D}icorynia guianensis; {H}umiria balsamifera) that are abundant in the {G}uiana shield ({N}orthern {A}mazonia). {L}eaf samples were collected in different international herbariums to cover a 200 year time-period (1790-2004) and the whole {G}uiana shield. {U}sing models describing carbon and oxygen isotope fractionations during photosynthesis, different scenarios of change in intercellular {CO}2 concentrations inside the leaf ({C}-i), stomatal conductance (g), and photosynthesis ({A}) were tested in order to understand leaf physiological response to increasing air {CO}2 concentrations ({C}-a). {O}ur results confirmed that both species displayed physiological response to changing {C}-a. {F}or both species, we observed a decrease of about 1.7% in delta {C}-13(leaf) since 1950, without significant change in {D}elta {C}-13(leaf) and leaf morphological traits. {F}urthermore, there was no clear change in delta {O}-18(leaf) for {H}umiria over this period. {O}ur simulation approach revealed that an increase in {A}, rather than a decrease in g, explained the observed trends for these tropical rainforest species, allowing them to maintain a constant ratio of {C}-i/{C}-a.},
  keywords = {carbon isotope composition ; environmental change ; herbarium ; oxygen ; isotope composition ; photosynthesis ; stomata ; tropical rainforests},
  booktitle = {},
  journal = {{P}lant {C}ell and {E}nvironment},
  volume = {34},
  numero = {8},
  pages = {1332--1344},
  ISSN = {0140-7791},
  year = {2011},
  DOI = {10.1111/j.1365-3040.2011.02333.x},
  URL = {https://www.documentation.ird.fr/hor/fdi:010053696},
}