@article{fdi:010076534,
  title = {{E}xtracellular enzyme activities of estuarine mudflats in {F}rench {G}uiana in relation with environmental factors across spatial and seasonal scales},
  author = {{L}uglia, {M}. and {C}riquet, {S}. and {S}arrazin, {M}ax and {G}uiral, {D}aniel},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he main aim of this study was to investigate the dynamic of extracellular enzyme activities within estuarine intertidal mudflats and to explore their potential environmental driving factors. {E}stuarine slikkes of the main rivers of {F}rench {G}uiana were sampled during two annual contrasted hydro-climatic seasons (wet and dry) over a two-year period (n = 38). {T}he spatio-temporal variability of four enzyme activities (alkaline phosphomonoesterase, arylsulfatase, beta-glucosidase, urease) was assessed and physico-chemical analyses (dry bulk density, salinity, p{H}, carbon, nitrogen and sulfur content) of sediments were carried out. {R}esults showed that the hydro-sedimentary specificities of each estuary, combined with the alternation of hydro-climatic seasons, had a strong influence on sediment physico-chemical characteristics. {T}hey revealed a gradient of mudflats under mainly continental versus marine influence. {M}udflats under mainly continental influence were characterized by oli-gohaline pore-waters, more acidic p{H} and relatively high organic matter content, and conversely for slikkes under mainly marine influence. {C}rossing of physico-chemical and functional data showed that the main factor associated with enzyme activities was the total nitrogen content. {T}o a lesser extent, p{H} and organic carbon content were also related to enzyme activities, but these relationships could not be generalized to all enzymes. {M}oreover, relationships between enzyme activities and physico-chemical variables were not dependent on the mudflat types, except for the beta-glucosidase which showed higher activity under mainly marine influence. {F}inally, relationships between enzyme activities and physico-chemical variables were not dependent on the seasons, except for alkaline phosphomonoesterase and urease activity, which showed opposite patterns according to seasons.},
  keywords = {{E}nvironmental driving factors ; {E}xtracellular enzyme activities ; {H}eterotrophic microbial community ; {I}ntertidal mudflat typology ; {S}ediment organic matter and nutrient cycling ; {S}patial and seasonal patterns ; {GUYANE} {FRANCAISE}},
  booktitle = {},
  journal = {{E}stuarine {C}oastal and {S}helf {S}cience},
  volume = {225},
  numero = {},
  pages = {art. 106243 [12 p.]},
  ISSN = {0272-7714},
  year = {2019},
  DOI = {10.1016/j.ecss.2019.106243},
  URL = {https://www.documentation.ird.fr/hor/fdi:010076534},
}