@article{fdi:010068675,
  title = {{C}ontrasted allometries between stem diameter, crown area, and tree height in five tropical biogeographic areas},
  author = {{B}lanchard, {E}lodie and {B}irnbaum, {P}. and {I}banez, {T}. and {B}outreux, {T}. and {A}ntin, {C}{\'e}cile and {P}loton, {P}ierre and {V}incent, {G}r{\'e}goire and {P}outeau, {R}obin and {V}androt, {H}. and {H}equet, {V}anessa and {B}arbier, {N}icolas and {D}roissart, {V}incent and {S}onke, {B}. and {T}exier, {N}icolas and {K}amdem, {N}. {G}. and {Z}ebaze, {D}. and {L}ibalah, {M}. and {C}outeron, {P}ierre},
  editor = {},
  language = {{ENG}},
  abstract = {{A}cross five biogeographic areas, {DBH}-{CA} allometry was characterized by inter-site homogeneity and intra-site heterogeneity, whereas the reverse was observed for {DBH}-{H} allometry. {T}ree crowns play a central role in stand dynamics. {R}emotely sensed canopy images have been shown to allow inferring stand structure and biomass which suggests that allometric scaling between stems and crowns may be tight, although insufficiently investigated to date. {H}ere, we report the first broad-scale assessment of stem vs. crown scaling exponents using measurements of bole diameter ({DBH}), total height ({H}), and crown area ({CA}) made on 4148 trees belonging to 538 species in five biogeographic areas across the wet tropics. {A}llometries were fitted with power functions using ordinary least-squares regressions on log-transformed data. {T}he inter-site variability and intra-site (sub-canopy vs. canopy trees) variability of the allometries were evaluated by comparing the scaling exponents. {O}ur results indicated that, in contrast to both {DBH}-{H} and {H}-{CA} allometries, {DBH}-{CA} allometry shows no significant inter-site variation. {T}his fairly invariant scaling calls for increased effort in documenting crown sizes as part of tree morphology. {S}tability in {DBH}-{CA} allometry, indeed, suggests that some universal constraints are sufficiently pervasive to restrict the exponent variation to a narrow range. {I}n addition, our results point to inverse changes in the scaling exponent of the {DBH}-{CA} vs. {DBH}-{H} allometries when shifting from sub-canopy to canopy trees, suggesting a change in carbon allocation when a tree reaches direct light. {T}hese results pave the way for further advances in our understanding of niche partitioning in tree species, tropical forest dynamics, and to estimate {AGB} in tropical forests from remotely sensed images.},
  keywords = {{A}llometry ; {T}ree architecture ; {S}tem size ; {O}ntogeny ; {C}rown light exposure ; {R}ainforest ; {NOUVELLE} {CALEDONIE} ; {INDONESIE} ; {INDE} ; {GUYANE} {FRANCAISE} ; {CAMEROUN} ; {GABON} ; {ZONE} {TROPICALE}},
  booktitle = {},
  journal = {{T}rees : {S}tructure and {F}unction},
  volume = {30},
  numero = {6},
  pages = {1953--1968},
  ISSN = {0931-1890},
  year = {2016},
  DOI = {10.1007/s00468-016-1424-3},
  URL = {https://www.documentation.ird.fr/hor/fdi:010068675},
}