Increasing CO 2  Concentration Impact upon Natural Phytoplankton Community at Spermonde Island, Indonesia: Mesocosm Study

Nita Rukminasari<sup>1</sup>; Muhammad Lukman<sup>1</sup>; Sahabuddin<sup>2</sup>

Increasing CO₂ Concentration Impact upon Natural Phytoplankton Community at Spermonde Island, Indonesia: Mesocosm Study

Nita Rukminasari¹

, Muhammad Lukman¹

, Sahabuddin²

1. Marine Science and Fisheries Faculty, Hasanuddin University, Indonesia
2. Research Institution for Coastal Aquaculture, Maros, Indonesia

Author

Correspondence author
International Journal of Marine Science, 2014, Vol. 4, No. 18 doi: 10.5376/ijms.2014.04.00018
Received: 08 Dec., 2013 Accepted: 20 Jan., 2014 Published: 24 Feb., 2014

This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Preferred citation for this article:

Rukminasari et al., 2014, Increasing CO₂ Concentration Impact upon Natural Phytoplankton Community at Spermonde Island, Indonesia: Mesocosm Study, International Journal of Marine Science, Vol.4, No.18: 166-178 (doi: 10.5376/ijms.2014.04.0018)

Abstract

Ocean acidification is one of an environment problem due to increasing CO₂ concentration. Ocean acidification have shown a negatively impact to marine organisms especially calcifying organisms such as microalgae, coral reef and other invertebrate organisms. Decreasing in carbonate saturation state on the calcification rates of individual species and communities in both planktonic and benthic habitats were occurred due to seawater acidification.

The study was conducted at three locations: Barru, Takalar and Barrang Lompo Island using mesocosm technique with two different of incubation periods (48 and 96 hours). Six pCO₂ level based on adding acid base treatments were used, which were 280, 380, 550, 650, 750 and 1000 ppm with 4 replicates

In general, alkalinity decreased with increasing CO₂ concentration. However, length of incubation was showed no significant affected to DIC for all CO₂ concentration at Barru and Barrang Lompo mesocosm experiment. PIC and POC showed a varied response between all locations of mesocosms experiment. There was a trend where increasing of POC with increasing of CO₂ concentration. PIC concentration at Barru and Takalar showed a slightl higher at 96 hours than 48 hours of incubation period and for Barrang Lompo mesocosm experiment PIC was higher at 48 hours than 96 hours of incubation period. Chlorophyll a and cell abundance was decresing with increasing CO₂ concentration. Growth, photosynthesis and calcification rate decreased with increasing CO₂ concentration.

Keywords

Ocean acidification; Calcifying microalgae; Calcification rate; Natural phytoplankton community; Mesocosm study; Spermonde Islands

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Increasing CO2 Concentration Impact upon Natural Phytoplankton Community at Spermonde Island, Indonesia: Mesocosm Study

Increasing CO₂ Concentration Impact upon Natural Phytoplankton Community at Spermonde Island, Indonesia: Mesocosm Study