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Role of ancient algae in building a healthy global marine ecosystem

Role of ancient algae in building a healthy global marine ecosystem

Kolkata, Jun 26 (UNI) A study of a microscopic ancient marine algae (Coccolithophores) led by the National Centre for Polar and Ocean Research (NCPOR) has found that there is a decrease in the concentration of oceanic calcium carbonate (CaCO3) in the Southern Indian ocean.

This decrease in CaCO3 is attributed to the increase in the concentration of another single-celled algae known as diatoms. This, in turn, will affect the growth and skeleton structure of coccolithophores, with potential significance for the world ocean ecosystem, according to Mohammad Faiyaz Anwar, Scientist at Vigyan Prasar Science Portal.

Coccolithophores are single-celled algae living in the upper layers of the world's oceans. They have been playing a key role in marine ecosystems and the global carbon cycle for millions of years. Coccolithophores calcify marine phytoplankton that produces up to 40% of open ocean calcium carbonate and responsible for 20% of the global net marine primary productivity,

Coccolithophores build exoskeletons from individual CaCO3 plates consisting of chalk and seashells building the tiny plates on their exterior. Though carbon dioxide is produced during the formation of these plates, coccolithophores help in removing it from the atmosphere and ocean by consuming it during photosynthesis. At equilibrium, coccolithophores absorb more carbon dioxide than they produce, which is beneficial for the ocean ecosystem.

NCPOR, the National Institute of Oceanography (NIO), and the Goa University revealed that abundance and diversity enrichment of coccolithophores in the southern Indian Ocean is highly dependent on time and influenced by various environmental factors such as silicate concentrations, calcium carbonate concentration, diatom abundance, light intensity and availability of macro and possibly micronutrient concentrations.

The research team's analysis revealed that the reduction of coccolithophore diversity in the early summer and late summer periods is due to an increase in the presence of diatom algae, which occurs after sea ice breakdown with climate change and ocean acidification, and increases the silicate concentration in the waters of the Southern Ocean.

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Meghalaya CM launches online excise portal

13 Aug 2020 | 8:01 PM

Shillong, Aug 13 (UNI) Meghalaya Chief Minister Conrad K. Sangma on Thursday formally launched the portal of the State excise department in order to facilitate application of online import permits for bonded warehouses.

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1-day monsoon session of Nagaland Assembly adjourns sine die

13 Aug 2020 | 7:54 PM

Kohima Aug 13 (UNI) The one-day monsoon Session of the Nagaland Legislative Assembly, which began here today, after finishing all the scheduled business of the Sixth Session of the 13th Nagaland Assembly Session, Speaker Sharingain Longkumer adjourned the assembly session sine die.

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Physically disabled Baraj secures 85 per cent marks in Plus two science exam

13 Aug 2020 | 7:42 PM

Kendrapara, Aug 13 (UNI) Baraj Das, a physically disabled poor youth of Sankhapada village under Bijaynagar GP of Mahakalapada block has cleared the annual plus two science examination securing 85 per cent of marks.

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Policeman succumbs to Covid illness, total cases reach 4112

13 Aug 2020 | 7:35 PM

Imphal, Aug 13 (UNI) A Manipur Policeman aged about 37 from Imphal West with history of hypertension expired at RIMS due to Covid 19.
The cumulative number of deaths is 13.

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Special Puja in remote village of Coastal Odisha for speedy recovery of Pranab Mukherjee

13 Aug 2020 | 7:27 PM

Kendrapara, Aug 13 (UNI) The family members of Tarunakanta Kanjilal of remote Ramanagar village under Mahakalapada block, organized a special puja today for speedy recovery of former President Pranab Mukherjee.

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