@article{fdi:010042679,
  title = {{A}bove-ground earthworm casts affect water runoff and soil erosion in {N}orthern {V}ietnam},
  author = {{J}ouquet, {P}ascal and {P}odwojewski, {P}ascal and {B}ottinelli, {N}icolas and {M}athieu, {J}{\'e}r{\^o}me and {R}icoy, {M}. and {O}range, {D}idier and {T}ran, {T}. {D}. and {V}alentin, {C}hristian},
  editor = {},
  language = {{ENG}},
  abstract = {{T}his manuscript focuses on the effects of above-ground earthworm casts on water runoff and soil erosion in steep-slope ecosystems in {N}orthern {V}ietnam. {W}e investigated the effects of {A}mynthas khami, an anecic species producing above-ground casts of prominent size, on water infiltration and soil detachment along a land-use intensification gradient: a cultivation of cassava ({M}ahinot esculenta; {CAS}), a plantation of {B}racharia ({B}racharia ruzziziensis; {BRA}), a fallow ({FAL}), a fallow after a forest of {E}ucalyptus sp. ({EUC}) and a plantation of trees ({A}cacia mangium and {V}enicia {M}ontana; {FOR}). {T}wo scales of studies were considered: (i) at the structure scale (cm(2)), a water runoff simulation was used to differentiate the effects of casts, free biogenic aggregates that previously belong to casts, and free pbysicogenic aggregates; (ii) at the station levels, 1-m(2) plots were used to determine runoff and soil detachment rates during the rainy season in 2005. {A}. khami was sensitive to land-use management. {E}arthworm density was low in all the fields (0-1 ind m(-2)). {T}he highest densities were found in {EUC} and {FOR} and no individual was found in {CAS}. {A}s a consequence, soil surface in {EUC} and {FOR} was covered with casts and free biogenic aggregates (approximately 22 and 8 kg m(-2), respectively). {I}n {FAL} and {BRA}, casts covered the soil only sparsely with < 3 kg m-2. {I}n {CAS}, soil surface was characterized by free physicogenic aggregates that might be produced by human activity or cridogeic earthworms through tillage (approximately 1 kg m-2). {W}ater runoff simulation clearly showed an enhancement of water infiltration with earthworm casting activity. {W}ater runoff was more decreased with casts ({R}-2 = 0.26) than free biogenic aggregates ({R}-2 = 0.49). {C}onversely, physicogenic aggregates were not associated with higher water infiltration. {A}nalyses of runoff and soil detachment rates during the rainy season underlined that the more land-use type have aggregates on soil surface and the less important is surface runoff ({R}-2 = 0.922). {C}onversely, no relation occurred between aggregates and soil detachment rate. {W}hile above-ground casting activity decreased surface runoff, they were not involved in soil detachment, and therefore soil erosion.},
  keywords = {{E}rosion ; {E}arthworms ; {A}bove-ground casts ; {L}and-use change ; {W}ater runoff ; {S}oil detachment},
  booktitle = {},
  journal = {{C}atena},
  volume = {74},
  numero = {1},
  pages = {13--21},
  ISSN = {0341-8162},
  year = {2008},
  DOI = {10.1016/j.catena.2007.12.006},
  URL = {https://www.documentation.ird.fr/hor/fdi:010042679},
}