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Influence of elevated temperature and pCO sub(2) on the marine periphytic diatom Navicula distans and its associated organisms in culture

Hydrobiologia, 2015-12, Vol.762 (1), p.127-142 [Peer Reviewed Journal]

ISSN: 0018-8158 ;EISSN: 1573-5117 ;DOI: 10.1007/s10750-015-2343-9

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  • Title:
    Influence of elevated temperature and pCO sub(2) on the marine periphytic diatom Navicula distans and its associated organisms in culture
  • Author: Baragi, Lalita V ; Khandeparker, Lidita ; Anil, Arga C
  • Subjects: Bacillariophyceae ; Marine ; Navicula distans
  • Is Part Of: Hydrobiologia, 2015-12, Vol.762 (1), p.127-142
  • Description: Influence of temperature and pCO sub(2), reflecting the future climatic scenario, on the marine periphytic diatom (Navicula distans) and its associated organisms was evaluated. Navicula distans along with its associated picoperiphyte and heterotrophic bacteria were exposed to two temperatures (30 degree C-present day, and 34 degree C-projected for year 2100) and pCO sub(2) levels (~500 mu atm-present day, and ~1500 mu atm-projected for year 2100) in a 2 2 factorial design. It was observed that rising temperature reduced the abundance of N. distans and picoperiphyte, but increased that of heterotrophic bacteria. On the other hand, rising pCO sub(2) favoured the growth of N. distans and picoperiphyte and had no significant effect on the bacterial growth. Synergistically, rising temperature and pCO sub(2) had a negative effect on N. distans, and a positive effect on picoperiphyte and heterotrophic bacteria. Additionally, this also resulted in the reduction of diatom cell size. This study suggests that in the future climatic scenario, increased abundance of picoperiphyte and heterotrophic bacteria along with smaller N. distans cells might influence the carbon budget and may have a cascading effect on higher trophic levels.
  • Language: English
  • Identifier: ISSN: 0018-8158
    EISSN: 1573-5117
    DOI: 10.1007/s10750-015-2343-9
  • Source: ProQuest Central
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