@article{fdi:010094376,
  title = {{I}nterplay of coprecipitation and adsorption processes : deciphering amorphous mineral-organic associations under both forest and cropland conditions},
  author = {{J}amoteau, {F}. and {D}oelsch, {E}. and {C}am, {N}. and {L}evard, {C}l{\'e}ment and {W}oignier, {T}. and {B}oulineau, {A}. and {S}aint-{A}ntonin, {F}. and {S}waraj, {S}. and {G}assier, {G}. and {D}uvivier, {A}. and {B}orschneck, {D}. and {P}ons, {M}. {L}. and {C}haurand, {P}. and {V}idal, {V}. and {B}rouilly, {N}. and {B}asile-{D}oelsch, {I}.},
  editor = {},
  language = {{ENG}},
  abstract = {{M}ineral-organic associations are crucial carbon and nutrient reservoirs in soils. {H}owever, conversion from forest to agricultural systems disrupts these associations, leading to carbon loss and reduced soil fertility in croplands. {I}dentifying the types of mineral-organic associations within a single soil is already challenging, and detecting those susceptible to disruption during forest-to-crop conversion is even more complex. {Y}et, addressing this identification challenge is essential for devising strategies to preserve organic matter in croplands. {H}ere, we aimed to identify the predominant mineral-organic associations within an {A}ndosol (developed on {F}e-poor parent material) under both forest and cropland conditions. {T}o achieve this, we collected {A}ndosol samples from both a forested and a cultivated area, located 300 m apart. {W}e then analyzed differences between the two soil profiles in soil physicochemical parameters and characterized mineral-organic associations using an array of spectro-microscopic techniques for comprehensive structural and compositional analysis. {A}t microscale and nanoscale spatial resolution, we observed mineral-organic associations in the form of amorphous coprecipitates, composed of a mix of {C}+{A}l+{S}i and {C}+{A}l+{F}e+{S}i nano{CLIC}s (inorganic oligomers with organics), proto-imogolites and organic matter, some {F}e nanophases associated with organic matter, and some metal-organic complexes. {T}his challenges prior conceptions of mineral-organic associations in {A}ndosols by demonstrating the presence of amorphous coprecipitates rather than solely organic matter associated with short-range-order minerals (i.e., imogolite and allophanes). {M}oreover, chemical mappings suggested that these amorphous coprecipitates may adhere to mineral surfaces (i.e., phyllosilicates and imogolites), revealing secondary interactions of mineral-organic associations in soils. {W}hile the presence of similar amorphous coprecipitates in both the forest and crop {A}ndosols was confirmed, the crop soil had 75 % less {C} in mineral-organic associations (in the 0-30 cm depth). {A}lthough the sample size for comparing land use types is limited, these results suggest that the nature of mineral-organic associations remains identical despite quantitative differences. {T}his study highlights the crucial role of amorphous coprecipitates in {C} stabilization in {A}ndosols and also suggests their vulnerability to disruption after 30 years of a forest-to-crop conversion, thereby challenging our understanding of the persistence of mineral-organic associations in {A}ndosols.},
  keywords = {{MARTINIQUE}},
  booktitle = {},
  journal = {{S}oil},
  volume = {11},
  numero = {2},
  pages = {535--552},
  ISSN = {2199-3971},
  year = {2025},
  DOI = {10.5194/soil-11-535-2025},
  URL = {https://www.documentation.ird.fr/hor/fdi:010094376},
}