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Impact of salinity and pH on phytoplankton communities in a tropical freshwater system: An investigation with pigment analysis by HPLC.
J Environ Monit. 2011 Mar; 13(3):614-20.JE

Abstract

An in vitro study was carried out to understand the effects of salinity shock and variation in pH on phytoplankton communities in a tropical freshwater system of the Godavari River (a major peninsular river in India). The distributions of, and variations in, phytoplankton communities were assessed by quantitative determination of their class specific marker pigments, using HPLC. Subtle changes in salinity of the freshwater by one practical salinity unit (PSU) completely removed green algae from the system and allowed the cyanobacteria to come into dominance. The cyanobacteria were found to tolerate higher osmotic stress until the salinity reached a PSU of 16. The higher salinity tolerance range of the cyanobacteria was attributed to the enhanced synthesis of zeaxanthin as protective xanthophylls against the osmotic stress. However, the effects of changing pH were not as dramatic as salinity where the green algae and the cyanobacteria from the same freshwater system showed a considerable acclimation towards the fluctuating pH. These findings are environmentally relevant to understand the likely impact of salt water intrusion and pH variation on phytoplankton communities in a tropical freshwater system.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Chakraborty P
National Institute of Oceanography (CSIR), India, Visakhapatnam, 530003, Andhra Pradesh, India. pchak@nio.org
Acharyya T
No affiliation info available
Raghunadh Babu PV
No affiliation info available
Bandyopadhyay D
No affiliation info available

MeSH

ChlorophytaChromatography, High Pressure LiquidCyanobacteriaEcosystemHydrogen-Ion ConcentrationIndiaPhytoplanktonPigments, BiologicalRiversSalinityTropical Climate

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21246149

Citation

Chakraborty, Parthasarathi, et al. "Impact of Salinity and pH On Phytoplankton Communities in a Tropical Freshwater System: an Investigation With Pigment Analysis By HPLC." Journal of Environmental Monitoring : JEM, vol. 13, no. 3, 2011, pp. 614-20.
Chakraborty P, Acharyya T, Raghunadh Babu PV, et al. Impact of salinity and pH on phytoplankton communities in a tropical freshwater system: An investigation with pigment analysis by HPLC. J Environ Monit. 2011;13(3):614-20.
Chakraborty, P., Acharyya, T., Raghunadh Babu, P. V., & Bandyopadhyay, D. (2011). Impact of salinity and pH on phytoplankton communities in a tropical freshwater system: An investigation with pigment analysis by HPLC. Journal of Environmental Monitoring : JEM, 13(3), 614-20. https://doi.org/10.1039/c0em00333f
Chakraborty P, et al. Impact of Salinity and pH On Phytoplankton Communities in a Tropical Freshwater System: an Investigation With Pigment Analysis By HPLC. J Environ Monit. 2011;13(3):614-20. PubMed PMID: 21246149.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Impact of salinity and pH on phytoplankton communities in a tropical freshwater system: An investigation with pigment analysis by HPLC. AU - Chakraborty,Parthasarathi, AU - Acharyya,Tamoghna, AU - Raghunadh Babu,P V, AU - Bandyopadhyay,Debasmita, Y1 - 2011/01/19/ PY - 2011/1/20/entrez PY - 2011/1/20/pubmed PY - 2011/6/21/medline SP - 614 EP - 20 JF - Journal of environmental monitoring : JEM JO - J Environ Monit VL - 13 IS - 3 N2 - An in vitro study was carried out to understand the effects of salinity shock and variation in pH on phytoplankton communities in a tropical freshwater system of the Godavari River (a major peninsular river in India). The distributions of, and variations in, phytoplankton communities were assessed by quantitative determination of their class specific marker pigments, using HPLC. Subtle changes in salinity of the freshwater by one practical salinity unit (PSU) completely removed green algae from the system and allowed the cyanobacteria to come into dominance. The cyanobacteria were found to tolerate higher osmotic stress until the salinity reached a PSU of 16. The higher salinity tolerance range of the cyanobacteria was attributed to the enhanced synthesis of zeaxanthin as protective xanthophylls against the osmotic stress. However, the effects of changing pH were not as dramatic as salinity where the green algae and the cyanobacteria from the same freshwater system showed a considerable acclimation towards the fluctuating pH. These findings are environmentally relevant to understand the likely impact of salt water intrusion and pH variation on phytoplankton communities in a tropical freshwater system. SN - 1464-0333 UR - https://www.unboundmedicine.com/medline/citation/21246149/Impact_of_salinity_and_pH_on_phytoplankton_communities_in_a_tropical_freshwater_system:_An_investigation_with_pigment_analysis_by_HPLC_ L2 - https://doi.org/10.1039/c0em00333f DB - PRIME DP - Unbound Medicine ER -