@article{fdi:010078883,
  title = {{I}mpacts of {Z}n and {C}u enrichment under ocean acidification scenario on a phytoplankton community from tropical upwelling system},
  author = {{S}harma, {D}. and {B}iswas, {H}. and {S}ilori, {S}. and {B}andyopadhyay, {D}. and {S}haik, {A}. {U}. and {C}ardinal, {D}. and {M}andeng {Y}ogo, {M}agloire and {R}ay, {D}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}ncreasing dissolution of {CO}2 in the surface ocean is rapidly decreasing its p{H} and changing carbon chemistry which is further affecting marine biota in several ways. {P}hytoplankton response studies under the combination of elevated {CO}2 and trace metals are rare. {W}e have conducted two consecutive onboard incubation experiments ({R}. {V}. {S}indhu {S}adhana; {A}ugust 2017) in the eastern {A}rabian {S}ea ({SW} coast of {I}ndia) during an upwelling event. {A} nutrient enriched diatom bloom was initiated onboard and grown under ambient (approximate to 400 mu atm, {A}-{CO}2) and high {CO} 2 levels (approximate to 1000 patm; {H}-{CO}2) with different zinc ({Z}n; 1 n{M}) and copper ({C}u) concentrations (1 n{M}, 2 n{M} and 8 n{M}). {P}hytoplankton community composition and the dominant genera were different during these two experiments. {CO}2 enrichment alone did not show any significant growth stimulating impact on the experimental community except enhanced cell density in the first experiment. {A}ddition of {Z}n at {A}-{CO}2 level revealed no noticeable responses; whereas, the same treatment under {H}-{CO}2 level significantly reduced cell number. {C}onsiderably high protein content under {H}-{CO}2+{Z}n treatment was possibly counteracting {Z}n toxicity which also caused slower growth rate. {C}u addition did not show any noticeable impact on growth and biomass production except increased protein content as well as decreased carbohydrate: protein ratio. {T}his can be attributed to relatively higher protein synthesis than carbohydrate to alleviate oxidative stress generated by {C}u. {T}he centric diatom {C}haetoceros and toxin producing pennate diatom {P}seudo-nitzschia showed no significant response to either {CO}2 or {Z}n enrichment. {L}arge centric diatom {L}eptocylindrus and {S}keletonema responded positively to {Z}n addition in both {CO}2 levels. {T}he former species showed the most sensitive response at the highest {C}u and {H}-{CO}2 treatment; whereas, the pennate diatoms {M}tzschia and {P}seudo-nttzschia (toxigenic diatom) showed higher resilience under elevated {CO}2 and {C}u levels. {T}his observation indicated that in future ocean, increasing {CO}2 concentrations and trace metal pollution may potentially alter phytoplankton community structure and may facilitate toxigenic diatom bloom in the coastal waters.},
  keywords = {{A}rabian sea ; {U}pwelling ; {O}cean acidification ; {C}opper ; {Z}inc ; {P}hytoplankton ; {D}iatoms ; {MER} {D}'{ARABIE} ; {INDE}},
  booktitle = {},
  journal = {{M}arine {E}nvironmental {R}esearch},
  volume = {155},
  numero = {},
  pages = {art. 104880 [11 p.]},
  ISSN = {0141-1136},
  year = {2020},
  DOI = {10.1016/j.marenvres.2020.104880},
  URL = {https://www.documentation.ird.fr/hor/fdi:010078883},
}