@article{fdi:010086406,
  title = {{R}esponse of plankton community respiration under variable simulated upwelling events},
  author = {{B}anos, {I}. and {A}ristegui, {J}. and {B}enavides, {M}ar and {G}omez-{L}etona, {M}. and {M}ontero, {M}. {F}. and {O}rtiz, {J}. and {S}chulz, {K}. {G}. and {L}udwig, {A}. and {R}iebesell, {U}.},
  editor = {},
  language = {{ENG}},
  abstract = {{C}limate change is expected to alter the intensity and frequency of upwelling in high productive coastal regions, thus impacting nutrient fluxes, primary productivity and consequently carbon cycling. {H}owever, it is unknown how these changes will impact the planktonic (phytoplankton and bacteria) community structure, which affects community respiration ({CR}) and hence the carbon available for sequestration or transfer to upper trophic levels. {H}ere we present results from a 37-day mesocosm experiment where we examined the response of {CR} to nutrient additions by simulating upwelling events at different intensities (low, medium, high and extreme) and modes (singular and recurring additions). {W}e also analysed the potential contribution of different plankton size classes and functional groups to {CR}. {T}he trend in accumulated {CR} with respect to nutrient fertilisation (total nitrogen added during the experiment) was linear in the two modes. {M}icroplankton (mostly diatoms) and nanoplankton (small flagellates) dominated under extreme upwelling intensities and high {CR} in both singular and recurring upwelling modes, explaining >65% of the observed variability in {CR}. {I}n contrast, prokaryotic picoplankton (heterotrophic bacteria and autotrophic cyanobacteria) explained <43% of the variance in {CR} under the rest of the upwelling intensities and modes tested. {C}hanges in planktonic community structure, while modulating {CR} variability, would regulate the metabolic balance of the ecosystem, shifting it towards net-heterotrophy when the community is dominated by small heterotrophs and to net-autotrophy when large autotrophs prevail; although depending on the mode in which nutrients are supplied to the system. {T}his shift in the dominance of planktonic organism will hence affect not only {CR} but also carbon sequestration in upwelling regions},
  keywords = {nutrient availability ; artificial upwelling ; carbon export ; {EBUS} ; mesocosm ; climate change ; {ATLANTIQUE} ; {CANARIES} ; {GANDO} {BAIE}},
  booktitle = {},
  journal = {{F}rontiers in {M}arine {S}cience},
  volume = {9},
  numero = {},
  pages = {1006010 [12 p.]},
  year = {2022},
  DOI = {10.3389/fmars.2022.1006010},
  URL = {https://www.documentation.ird.fr/hor/fdi:010086406},
}