@article{fdi:010069319,
  title = {{B}iogeochemical cycling and phyto- and bacterioplankton communities in a large and shallow tropical lagoon ({T}erminos {L}agoon, {M}exico) under 2009-2010 {E}l {N}ino {M}odoki drought conditions},
  author = {{C}onan, {P}. and {P}ujo-{P}ay, {M}. and {A}gab, {M}. and {C}alva-{B}enitez, {L}. and {C}hifflet, {S}andrine and {D}ouillet, {P}ascal and {D}ussud, {C}. and {F}ichez, {R}enaud and {G}renz, {C}. and {M}endieta, {F}. {G}. and {O}rigel-{M}oreno, {M}. and {R}odriguez-{B}lanco, {A}. and {S}auret, {C}. and {S}everin, {T}. and {T}edetti, {M}arc and {A}lvarado, {R}. {T}. and {G}higlione, {J}. {F}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he 2009-2010 period was marked by an episode of intense drought known as the {E}l {N}ino {M}odoki event. {S}ampling of the {T}erminos {L}agoon ({M}exico) was carried out in {N}ovember 2009 in order to understand the influence of these particular environmental conditions on organic matter fluxes within the lagoon's pelagic ecosystem and, more specifically, on the relationship between phyto-and bacterioplankton communities. {T}he measurements presented here concern biogeochemical parameters (nutrients, dissolved and particulate organic matter [{POM}], and dissolved polycyclic aromatic hydrocarbons [{PAH}s]), phytoplankton (biomass and photosynthesis), and bacteria (diversity and abundance, including {PAH} degradation bacteria and ectoenzymatic activities). {D}uring the studied period, the water column of the {T}erminos {L}agoon functioned globally as a sink and, more precisely, as a "nitrogen assimilator". {T}his was due to the high production of particulate and dissolved organic matter ({DOM}), even though exportation of autochthonous matter to the {G}ulf of {M}exico was weak. {W}e found that "bottom-up" control accounted for a large portion of the variability of phytoplankton productivity. {N}itrogen and phosphorus stoichiometry mostly accounted for the heterogeneity in phytoplankton and free-living prokaryote distribution in the lagoon. {I}n the eastern part, we found a clear decoupling between areas enriched in dissolved inorganic nitrogen near the {P}uerto {R}eal coastal inlet and areas enriched in phosphate ({PO}4) near the {C}andelaria estuary. {S}uch a decoupling limited the potential for primary production, resulting in an accumulation of dissolved organic carbon and nitrogen ({DOC} and {DON}, respectively) near the river mouths. {I}n the western part of the lagoon, maximal phytoplankton development resulted from bacterial activity transforming particulate organic phosphorus ({PP}) and dissolved organic phosphorus ({DOP}) to available {PO}4 and the coupling between {P}alizada {R}iver inputs of nitrate ({NO}3) and {PP}. {T}he {C}humpan {R}iver contributed only marginally to {PO}4 inputs due to its very low contribution to overall river inputs. {T}he highest dissolved total {PAH} concentrations were measured in the {E}l {C}armen {I}nlet, suggesting that the anthropogenic pollution of the zone is probably related to the oil-platform exploitation activities in the shallow waters of the southern of the {G}ulf of {M}exico. {W}e also found that a complex array of biogeochemical and phytoplanktonic parameters were the driving force behind the geographical distribution of bacterial community structure and activities. {F}inally, we showed that nutrients brought by the {P}alizada {R}iver supported an abundant bacterial community of {PAH} degraders, which are of significance in this important oil-production zone.},
  keywords = {{MEXIQUE}},
  booktitle = {},
  journal = {{B}iogeosciences},
  volume = {14},
  numero = {4},
  pages = {959--975},
  ISSN = {1726-4170},
  year = {2017},
  DOI = {10.5194/bg-14-959-2017},
  URL = {https://www.documentation.ird.fr/hor/fdi:010069319},
}