Responses of phytoplankton community to eutrophication in Semerak Lagoon (Malaysia)

Responses of phytoplankton community to eutrophication in Semerak Lagoon (Malaysia) Effects of aquaculture activities on the environmental parameters and phytoplankton community structure were investigated in a semi-enclosed lagoon located at Semerak River, Malaysia. Elevated concentrations of phosphate and ammonia were observed at the aquaculture area and the inner lagoon. Relatively low dissolved oxygen, high total chlorophyll a, and high phytoplankton abundances but low species richness were recorded. Chaetoceros, Pseudo-nitzschia brasiliana, Blixaea quinquecornis,and Skeletonema blooms were observed, and some were associated with anoxia condition. Eutrophication level assessed by UNTRIX suggests that the water quality in the lagoon is deteriorating. Dissolved inorganic phosphorus and nitrogen at the impacted area were 15 and 12 times higher than the reference sites, respectively. Such trophic status indices could provide a useful guideline for optimal aquaculture management plan to reduce the environmental impact caused by aquaculture. . . . . . Keywords Algal blooms Diatoms Dinoflagellates Eutrophication Phytoplankton UNTRIX Introduction system has posed the most serious impact to the surrounding environments as compared to other mariculture activities such In Malaysia, aquaculture industry has been developed since as seaweed and shellfish cultures (Jiang et al. 2012). 1920 and becomes one of the high-value agricultural sectors. The increasing severity of the impacts from fish farm ef- Some http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Environmental Science and Pollution Research Springer Journals

Responses of phytoplankton community to eutrophication in Semerak Lagoon (Malaysia)

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Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2018 by Springer-Verlag GmbH Germany, part of Springer Nature
Subject
Environment; Environment, general; Environmental Chemistry; Ecotoxicology; Environmental Health; Atmospheric Protection/Air Quality Control/Air Pollution; Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution
ISSN
0944-1344
eISSN
1614-7499
D.O.I.
10.1007/s11356-018-2389-0
Publisher site
See Article on Publisher Site

Abstract

Effects of aquaculture activities on the environmental parameters and phytoplankton community structure were investigated in a semi-enclosed lagoon located at Semerak River, Malaysia. Elevated concentrations of phosphate and ammonia were observed at the aquaculture area and the inner lagoon. Relatively low dissolved oxygen, high total chlorophyll a, and high phytoplankton abundances but low species richness were recorded. Chaetoceros, Pseudo-nitzschia brasiliana, Blixaea quinquecornis,and Skeletonema blooms were observed, and some were associated with anoxia condition. Eutrophication level assessed by UNTRIX suggests that the water quality in the lagoon is deteriorating. Dissolved inorganic phosphorus and nitrogen at the impacted area were 15 and 12 times higher than the reference sites, respectively. Such trophic status indices could provide a useful guideline for optimal aquaculture management plan to reduce the environmental impact caused by aquaculture. . . . . . Keywords Algal blooms Diatoms Dinoflagellates Eutrophication Phytoplankton UNTRIX Introduction system has posed the most serious impact to the surrounding environments as compared to other mariculture activities such In Malaysia, aquaculture industry has been developed since as seaweed and shellfish cultures (Jiang et al. 2012). 1920 and becomes one of the high-value agricultural sectors. The increasing severity of the impacts from fish farm ef- Some

Journal

Environmental Science and Pollution ResearchSpringer Journals

Published: Jun 1, 2018

References

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