@article{fdi:010092526,
  title = {{C}ontrasting strategies of nutrient demand and use between savanna and forest ecosystems in a neotropical transition zone},
  author = {{S}calon, {M}.{C}. and {O}liveras {M}enor, {I}mma and {F}reitag, {R}. and {P}eixoto, {K}.{S}. and {R}ifai, {S}.{W}. and {M}arimon, {B}.{S}. and {M}arimon {J}unior, {B}.{H}. and {M}alhi, {Y}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he total demand for and uptake of nutrients by vegetation is rarely quantified or compared across vegetation types. {H}ere, we describe different nutrient use and allocation strategies in neotropical savanna (cerrado) and transitional forest (cerradão)





tree communities composed of different species, report leaf nutrient resorption and calculate ecosystem-level nutrient use efficiency. {W}e couple net primary productivity ({NPP}) estimates with nutrient stoichiometry to quantify nutrient demand and





nutrient flows at the whole-stand scale for different components of vegetation biomass. {S}pecies from the two vegetation communities showed similar mean nutrient concentrations and nutrient resorption efficiency, except for wood {P} concentration





that was fourfold higher in cerrado than cerradão species. {T}he cerradão showed higher canopy {NPP}, while fine roots and wood {NPP} were similar for the two vegetation types. {N}utrient requirement in the two vegetation types was dominated by the





demands of the canopy, with canopy resorption generally contributing more than 50 % of the total canopy demand for nutrients, while less than 35 % of {N}, {P}, {K}, {C}a and {M}g were allocated to wood or fine roots. {P}roportionally, cerrado showed higher





nutrient demand from fine roots (over 35 % of the total nutrient demand) and for the wood component (over 13 % of the total nutrient demand), while average 60 %-70 % of the cerradão nutrient demand was allocated to the canopy. {T}he proportional





difference in nutrient allocation to the different biomass components suggests cerrado species allocate less nutrients to a given fine root biomass, but more nutrients to a given wood biomass. {O}ur findings suggest that cerradão species are more limited in {P} and {K} than cerrado species, inducing higher resorption to compensate for low uptake. {M}oreover, we found that {N} uptake for cerradão was higher with lower {N} use efficiency, i.e. the amount of production per nutrient unit, leading higher {N} demand compared to the cerrado. {T}his difference in nutrient dynamics explains how similar soils and the same climate dominated by savanna vegetation can also support forest-like formations. {T}ree species composition is likely the major factor regulating nutrient use, limiting vegetation transitions and influencing nutrient demand at landscape scales.},
  keywords = {{ZONE} {TROPICALE} ; {BRESIL} ; {MATO} {GROSSO}},
  booktitle = {},
  journal = {{B}iogeosciences},
  volume = {19},
  numero = {15},
  pages = {3649--3661},
  ISSN = {1726-4189},
  year = {2022},
  DOI = {10.5194/bg-19-3649-2022},
  URL = {https://www.documentation.ird.fr/hor/fdi:010092526},
}