Water Quality and Aquatic Insects Study at the Lower Kinabatangan River Catchment, Sabah: In Response to Weak La Niña Event

Harun, Sahana; Al‐Shami, Salman Abdo; Dambul, Ramzah; Mohamed, Maryati; Abdullah, Mohd Harun

doi:10.17576/jsm-2015-4404-09

Cited by 14 publications

(11 citation statements)

References 75 publications

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“…This analysis was also sought to verify whether the rainfall data used in the study were free from precipitation anomalies, potentially caused by irregular synoptic forcing associated with the El Niño Southern Oscillation (ENSO) and changes in the seasonality of the monsoon in SE Asia. 44 Discriminant analysis was applied to characterise DOM according to the land use type and seasonal variations. Calculations of the uorescence intensities (I n ) of the individual components indicated that: IC4 > IC2 > IC3 > IC1 > IC5, suggesting that the terrestrially derived peak A had the most abundant spectral characteristics, followed by peak M (IC2 and IC3), peak C (IC1) and peak M (IC5).…”

Section: Discussionmentioning

confidence: 99%

“…1) during a weak La Niña event (2005 to 2006) indicated that the Biochemical Oxygen Demand (BOD) of a stream in an oil palm plantation ranged from 1.3 to 2.1 mg l À1 . 44 Dry season water samples from downstream reaching Sg. Langat in Selangor, Malaysia, which was also located within oil palm plantations, had mean BOD values ranging from 2.1 to 2.6 mg l À1 .…”

Section: Seasonal and Land Use Variationsmentioning

confidence: 99%

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Spatial and seasonal variations in the composition of dissolved organic matter in a tropical catchment: the Lower Kinabatangan River, Sabah, Malaysia

Harun

Baker

Bradley

et al. 2016

Environ. Sci.: Processes Impacts

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Dissolved organic matter (DOM) was characterised in water samples sampled in the Lower Kinabatangan River Catchment, Sabah, Malaysia between October 2009 and May 2010. This study aims at: (i) distinguishing between the quality of DOM in waters draining palm oil plantations (OP), secondary forests (SF) and coastal swamps (CS) and, (ii) identifying the seasonal variability of DOM quantity and quality. Surface waters were sampled during fieldwork campaigns that spanned the wet and dry seasons. DOM was characterised optically by using the fluorescence Excitation Emission Matrix (EEM), the absorption coefficient at 340 nm and the spectral slope coefficient (S). Parallel Factor Analysis (PARAFAC) was undertaken to assess the DOM composition from EEM spectra and five terrestrial derived components were identified: (C1, C2, C3, C4 and C5). Components C1 and C4 contributed the most to DOM fluorescence in all study areas during both the wet and dry seasons. The results suggest that component C4 could be a significant (and common) PARAFAC signal found in similar catchments. Peak M (C2 and C3) was dominant in all samples collected during wet and dry seasons, which could be anthropogenic in origin given the active land use change in the study area. In conclusion, there were significant seasonal and spatial variations in DOM which demonstrated the effects of land use cover and precipitation amounts in the Kinabatangan catchment.

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Section: Discussionmentioning

confidence: 99%

Section: Seasonal and Land Use Variationsmentioning

confidence: 99%

Spatial and seasonal variations in the composition of dissolved organic matter in a tropical catchment: the Lower Kinabatangan River, Sabah, Malaysia

Harun

Baker

Bradley

et al. 2016

Environ. Sci.: Processes Impacts

Self Cite

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“…Preceding research conducted at the Teroi and Batu Hampar rivers of Gunung Jerai forest reserve, Kedah by Hamid et al (2011) reported that genus Baetis (family Baetidae) had a positive correlation with DO. Nevertheless, based on a study conducted in the lower catchment of the Kinabatangan River, Sabah, Harun et al (2015) reported that Coenagrionidae and Libellulidae were declined in the high concentrations of DO. The families in the second quadrant, especially Glossiphoniidae, Lumbriculidae, Protoneuridae, Chironomidae and unidentified Oligochaeta, were highly influenced by TSS, turbidity and COD.…”

Section: Resultsmentioning

confidence: 99%

Application of Ecological Indices using Macroinvertebrate Assemblages in Relation to Aquaculture Activities in Rawang Sub-basin, Selangor River, Malaysia

Hettige¹,

Hashim²,

Kutty³

et al. 2020

JST

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This study aimed to evaluate benthic macroinvertebrates assemblages using the application of ecological indices in the Rawang sub-basin of the Selangor River with reference to determining the impacts of aquaculture practices on benthic macroinvertebrates. In total, seven sampling sites were selected, namely Guntong (SR1), Guntong’s tributaries (SR2, control site), Kuang (SR3 and SR7), Gong (SR4), Buaya (SR5) and Serendah (SR6) Rivers. Sites were selected using a random sampling technique and the accessibility and proximity to aquaculture farms. Macroinvertebrates were sampled from April 2019 to March 2020 using an aquatic kick net, a hand spade, and a D-frame dip net. Water samples were also taken. Twenty-seven families belonging to the Annelida, Mollusca and Athropoda phyla were identified using taxonomic keys. Tubificidae was found to be the most dominant family (36.79%) followed by Chironomidae (28.84%). The highest number of individuals from family Tubificidae was recorded in Gong River, where effluent was discharged from an aquaculture farm. The total abundance of benthic macroinvertebrates increased with increased proximity to the aquaculture farm. Based on Biological Monitoring Working Party score value, the water quality of sampling sites in close proximity to the aquaculture farm was polluted as compared to the control location. Family Biotic Index score showed that all sites were substantially polluted with organic pollution, with the control site being much less polluted. In conclusion, benthic macroinvertebrates assemblage was affected by effluent originating from aquaculture farm outlets. It is therefore necessary to conduct aquaculture farming using methods that are deemed to be environmentally friendly.

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“…Several studies have analyzed the changes of benthic community dictated by seasonal rainfall [36][37][38], including those in Peninsular Malaysia [39][40][41]. In general, rainfall pattern in Malaysia is much influenced by wind flow pattern during the seasonal period.…”

Section: Resultsmentioning

confidence: 99%

Integrated Approaches in Water Quality Monitoring for River Health Assessment: Scenario of Malaysian River

Salmiati¹,

Arman²,

Salim³

2017

Water Quality

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Current practice of determining river water quality in Malaysia is based mainly on physicochemical components. Perhaps, owing to the lack of information on habitat requirements and ecological diversity of aquatic macroinvertebrates and on unearthly taxonomic key of benthic macroinvertebrates in this region makes it less popular than conventional methods. The study took place in three rivers in the state of Johor, Southern Peninsula of Malaysia, which exhibited different degrees of disturbances and physical properties, namely Sungai Ayer Hitam Besar, Sg Berasau, and Sg Mengkibol. Benthic macroinvertebrates were sampled using rectangular dipnet with frame dimension 0.5 m × 0.3 m. Although physicochemical elements such as water temperature, pH, and dissolved oxygen (DO) were measured using a YSI Professional Plus handheld multiparameter instrument, other parameters such as biochemical oxygen demand (BOD 5 ), chemical oxygen demand (COD), total suspended solid (TSS), and ammoniacal nitrogen (NH 3 N) were tested using the procedure of APHA Standard Method. The study found that the status of water quality varies among the three rivers. A multivariate analysis, the canonical correspondence analysis (CCA), was applied to elucidate the relationships between biological assemblages of species and their environment using PAST (version 2) software. The present findings reveal that humaninduced activities are the ultimate causes of the alteration in macroinvertebrate biodiversity.

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Water Quality and Aquatic Insects Study at the Lower Kinabatangan River Catchment, Sabah: In Response to Weak La Niña Event

Cited by 14 publications

References 75 publications

Spatial and seasonal variations in the composition of dissolved organic matter in a tropical catchment: the Lower Kinabatangan River, Sabah, Malaysia

Spatial and seasonal variations in the composition of dissolved organic matter in a tropical catchment: the Lower Kinabatangan River, Sabah, Malaysia

Application of Ecological Indices using Macroinvertebrate Assemblages in Relation to Aquaculture Activities in Rawang Sub-basin, Selangor River, Malaysia

Integrated Approaches in Water Quality Monitoring for River Health Assessment: Scenario of Malaysian River

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