An approach based on nematode descriptors for the classification of ecological quality (EcoQ) of the Malaysian coasts

Chen, Cheng-Ann and Soo, Chen Lin and Balsamo, Maria and Semprucci, Federica (2018) An approach based on nematode descriptors for the classification of ecological quality (EcoQ) of the Malaysian coasts. Marine Biodiversity, 48 (1). pp. 117-126. ISSN 18671616

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Free-living marine nematodes were employed in ecological studies and were proven to be suitable bioindicators of pollution-induced effects on the benthic domain. This study represents the first attempt to use nematode descriptors in order to assign ecological quality (EcoQ) status to areas along the Sarawak coasts, thus integrating the methods actually applied by the Department of Environment (DOE). Three nematode parameters, i.e. colonizer–persister percentage, maturity index (MI), and Shannon diversity index (Hˈ), were used, as they are recognized as the best descriptors of EcoQ status in coastal habitats. The thresholds applied to the nematode parameters for the Sarawak study sites showed predominantly moderate and bad EcoQ status, with the exception of the Similajau site, which being close to a national park was found to have good EcoQ. The sites with the worst EcoQ were characterized by low salinity values, suggesting riverine inflows as a primary source of pollution, likely from the discharge of untreated wastes. This was confirmed by both the Hˈ and MI indices, which showed a close positive relation with salinity. Results obtained for the Niah site may suggest that “traces” of pollution were left in the nematode assemblages that could not be detected from other parameters of the water column. This investigation shows that analysis of nematode descriptors could be effectively applied to ecological assessment criteria within environmental policies of rapid growth countries such as Malaysia. Furthermore, it certainly suggests the need for management and conservation actions in the Sarawak coasts aimed at more sustainable use of the marine resources to prevent the loss of biodiversity.

Item Type: Article
Uncontrolled Keywords: Zoobenthos, Meiofauna, Ecological quality assessment, Anthropogenic impact, unimas, university, universiti, Borneo, Malaysia, Sarawak, Kuching, Samarahan, ipta, education, research, Universiti Malaysia Sarawak
Subjects: G Geography. Anthropology. Recreation > GF Human ecology. Anthropogeography
Divisions: Academic Faculties, Institutes and Centres > Faculty of Resource Science and Technology
Faculties, Institutes, Centres > Faculty of Resource Science and Technology
Depositing User: Ibrahim
Date Deposited: 22 May 2018 03:17
Last Modified: 22 May 2018 03:17

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