@article{fdi:010077293,
  title = {{L}and use strongly influences soil organic carbon and bacterial community export in runoff in tropical uplands},
  author = {{L}e, {H}. {T}. and {R}ochelle-{N}ewall, {E}mma and {R}ibolzi, {O}livier and {J}aneau, {J}ean-{L}ouis and {H}uon, {S}. and {L}atsachack, {K}. and {P}ommier, {T}.},
  editor = {},
  language = {{ENG}},
  abstract = {{R}apid development and associated land-use change have resulted in increased soil erosion and widespread land degradation in tropical ecosystems. {P}recipitation-induced soil erosion causes the export of soil organic carbon ({SOC}) and the associated bacterial community affecting soil quality and functioning. {W}e assessed the transfer of {SOC} and soil bacterial diversity and functions in surface water runoff from different land uses: {T}eak with and without understory ({TW} and {TWO}, respectively) and upland rice ({UR}) in a tropical, upland catchment during a simulated rain event. {T}otal suspended sediment ({TSS}) concentration was higher in {TWO} (1.23 +/- 0.21 g {L}-1) than in {TW} (0.37 +/- 0.16 g {L}-1) and {UR} (0.44 +/- 0.2 g {L}-1), whereas dissolved organic carbon ({DOC}) concentration was lower under {TWO} (3.8 +/- 0.7 mg {L}-1) than under {TW} or {UR} (13.4 +/- 7.5 and 9.57 +/- 4.8 mg {L}-1, respectively). {R}unoff from {TWO} harboured the highest proportion of bacterial taxa common to soil (27% and 29.5%) as compared with {TW} (22.8% and 13%) and {UR} (17.3% and 7%) for both particle attached and free-living fractions, respectively. {B}acterial community export in surface runoff was driven by changes in {DOC} and {TSS}, suggesting that eroded soil particles simultaneously carry organic carbon and attached bacterial taxa in surface runoff. {C}onsequently, the export of soil functional groups relating to organic carbon degradation and nitrogen cycle was higher under {TWO} than in {TW} or {UR}. {O}ur results underline that teak plantations with unsustainable practices such as the removal of understory degrades soil functions and accelerates land degradation through soil erosion and surface runoff on the long term.},
  keywords = {bacterial function ; land degradation ; rain simulation ; soil erosion ; unsustainable land use ; {LAOS} ; {MEKONG} {BASSIN}},
  booktitle = {},
  journal = {{L}and {D}egradation and {D}evelopment},
  volume = {31},
  numero = {1},
  pages = {118--132},
  ISSN = {1085-3278},
  year = {2020},
  DOI = {10.1002/ldr.3433},
  URL = {https://www.documentation.ird.fr/hor/fdi:010077293},
}