@article{fdi:010073521,
  title = {{M}ercury behaviour and {C}, {N}, and {P} biogeochemical cycles during ecological restoration processes of old mining sites in {F}rench {G}uiana},
  author = {{C}ouic, {E}. and {G}rimaldi, {M}ichel and {A}lphonse, {V}. and {B}alland-{B}olou-{B}i, {C}. and {L}ivet, {A}. and {G}iusti-{M}iller, {S}. and {S}arrazin, {M}ax and {B}ousserrhine, {N}.},
  editor = {},
  language = {{ENG}},
  abstract = {{S}everal decades of gold mining extraction activities in the {A}mazonian rainforest have caused deforestation and pollution. {W}hile ecological rehabilitation is essential for restoring biodiversity and decreasing erosion on deforested lands, few studies note the behaviour or toxicity of trace elements during the rehabilitation process. {O}ur original study focused on the potential use of microbial activity and {H}g speciation and compared them with {A}s, {C}u, {Z}n and {C}r speciation in assessing the chemical and biological quality of ecological restoration efforts. {W}e sampled two sites in {F}rench {G}uyana 17 years after rehabilitation efforts began. {T}he former site was actively regenerated ({R}) with the leguminous species {C}litoria racemosa and {A}cacia mangium, and the second site was passively regenerated with spontaneous vegetation ({S}v). {W}e also sampled soil from a control site without a history of gold mining ({F}). {W}e performed microcosm soil experiments for 30 days, where trace element speciation and enzyme activities (i.e., {FDA}, dehydrogenase, beta-glucosidase, urease, alkaline and acid phosphatase) were estimated to characterise the behaviour of trace elements and the soil microbial activity. {A}s bioindicators, the use of soil microbial carbon biomass and soil enzyme activities related to the carbon and phosphorus cycles seems to be relevant for assessing soil quality in rehabilitated and regenerated old mining sites. {O}ur results showed that restoration with leguminous species had a positive effect on soil chemical quality and on soil microbial bioindicators, with activities that tended toward natural non-degraded soil ({F}). {A}ctive restoration processes also had a positive effect on {H}g speciation by reducing its mobility. {W}hile in {S}v we found more exchangeable and soluble mercury, in regenerated sites, {H}g was mostly bound to organic matter. {T}hese results also suggested that enzyme activities and mercury cycles are sensitive to land restoration and must be considered when evaluating the efficiency of restoration processes.},
  keywords = {{GUYANE} {FRANCAISE} ; {AMAZONIE}},
  booktitle = {},
  journal = {{E}nvironmental {S}cience : {P}rocesses and {I}mpacts},
  volume = {20},
  numero = {4},
  pages = {657--672},
  ISSN = {2050-7887},
  year = {2018},
  DOI = {10.1039/c8em00016f},
  URL = {https://www.documentation.ird.fr/hor/fdi:010073521},
}