Water pollution due to a harmful algal bloom: a preliminary study from two drinking water reservoirs in Kandy, Sri Lanka

Yatigammana, S. K.; Ileperuma, O.A.; Perera, M.B.U.

doi:10.4038/jnsfsr.v39i1.2930

Cited by 8 publications

(10 citation statements)

References 6 publications

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“…Among the dinoflagellates, two Peridinium species recorded from Sri Lankan reservoirs, in previous studies includes P. cinctum (Perera and Piyasiri, 1998) and P. aciculiferum (Yatigammana et al, 2011). Current study was also able encounter a Peridinium species morphologically similar to P. aciculiferum from 22 reservoirs located in all three climatic regions.…”

Section: Cluster Analysissupporting

confidence: 57%

“…These "cyanotoxins" are usually either hepatotoxic or neurotoxic in pathology and have been related to several cases of human sickness and death, as well as various occurrences of animal mortality (Falconer, 2005; Kuiperpolonicum, P. willei, P. volzii and P. aciculiferum have been identified as common freshwater species (Niese et al, 2007). Among them, Peridinium aciculiferum, known to produce a biological toxin, has already been recorded from Sri Lankan drinking water reservoirs (Yatigammana and Perera, 2017;Yatigammana et al, 2011;Sethunge & Pathmalal,2010;Idroos et al, 2017).…”

Section: Cyanobacteriamentioning

confidence: 99%

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Quantitative observations of Cyanobacteria and Dinoflagellata in reservoirs of Sri Lanka

Senanayake

Yatigammana

2017

Ceylon J. Sci.

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Abstract:. Cyanobacterial and dinoflagellate blooms have a range of social, environmental and economic impacts due to their potential of toxin production under extreme environmental conditions. Therefore, the present study aimed to understand the species abundance, distribution and the relationship between species distribution and measured environmental variables within the 45 reservoirs studied, covering three major climatic regions of Sri Lanka (Wet, Intermediate and Dry). Plankton samples were obtained using a 34µm plankton net. Both field and laboratory analyses were conducted to obtain limnological data of each reservoir. Multivariate statistical techniques were used to understand the species distribution along measured environmental gradients. Thirteen species of Cyanobacteria were identified and seven of them were toxigenic. The Dry Zone showed the highest diversity of Cyanobacteria including toxigenic species and the Wet Zone showed the lowest. While Cylindrospermopsis raciborskii was the dominant species recorded in 22% of the sampled reservoirs, Pseudoanabaena limnetica was the least dominant. Only one species of Dinoflagellate, Peridinium aciculiferum was identified from all the climatic regions. Multivariate statistical analysis revealed that temperature is the most important environmental variable that determines the species variation and abundance among the sites.

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Section: Cluster Analysissupporting

confidence: 57%

Section: Cyanobacteriamentioning

confidence: 99%

Quantitative observations of Cyanobacteria and Dinoflagellata in reservoirs of Sri Lanka

Senanayake

Yatigammana

2017

Ceylon J. Sci.

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“…In Sri Lanka too, epidemics related to algal toxins were reported in the recent history (e.g. Yatigammana et al, 2011), though it was caused by a dinoflagellate, Peridinium aciculiferum. Piyathilaka et al (2015) recorded that Microcystin-LR-induced cytotoxicity and apoptosis in human embryonic kidney and human kidney adenocarcinoma cell lines.…”

Section: Discussionmentioning

confidence: 99%

“…These toxins are mostly having an allelopathic effect on many native species causing reduction in the diversity of plankton communities (Yatigammana et al, 2011;Jayatissa et al, 2006). Although these toxigenic algal blooms initially appeared in small water bodies located in urban areas, recent studies indicate high abundance of toxigenic cyanobacteria in large reservoirs in remote regions .…”

Section: Introductionmentioning

confidence: 99%

Distribution of <em>Cylindrospermopsis raciborskii</em> (Cyanobacteria) in Sri Lanka

Yatigammana

Perera

2017

Ceylon J. Sci.

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Sri Lanka is a tropical continental island which consists of 103 natural rivers and over ten thousand man-made lakes. Majority of these water resources are known to be contaminated with different types of toxigenic cyanobacteria making water unsuitable for human and animal consumption. Cylindrospermopsis raciborskii, a toxin producing tropical cyanobacterium, recently recorded at high abundances in lentic waters of the country. This species is highly adaptive and exhibit different morphotypes: straight, coiled and sigmoid-shaped trichomes under different environmental conditions. Distribution and abundance of the species is mainly depending on the environmental factors and therefore remedies can be proposed to keep the populations under control. This preliminary study was conducted to understand the prevalence of C. raciborskii, in Sri Lankan reservoirs. Sixty three reservoirs representing all climatic regions with varying environmental conditions were assessed using standard procedures. The results of the study reviewed that C. raciborskii is a dominant cyanobacterium species especially during the dry season in shallow urban reservoirs, terminal reservoirs in large cascades, reservoirs with low flushing rates and deep reservoirs with persistent water stratification. Morphological variations were common in urban and shallow reservoirs that maintain high water retention time. They commonly occur in coiled-shape. However, in eutrophic water bodies they are appeared to support other morphotypes: straight, sigmoid or tricomatous. Further, it was noticed that the cell size of C. raciborskii is exceptionally large (width 3.5 µm and length 7µm) in a high altitudinal wet-zone reservoir that usually maintains temperature range of 10 o C -20 o C throughout the year. The results showed that C. raciborskii is widely distributed all over the country and the presence of several morphotypes signifies its potential for rapid distribution.

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“…Coda H1 and S1 representing cyanobacteria were closely correlated with the concentration of ammonium nitrogen in water (Figure 4). This is due to the fact that cyanobacteria representing these two coda prefer this form of nitrogen [33][34][35][36][37][38][39][40]. As the concentration of ammonium nitrogen was lower during the second method of restoration due to nitrification and denitrification processes in the hypolimnion [11], there was also a decrease in biomass of coda H1 and S1.…”

Section: Discussionmentioning

confidence: 99%

Functional Groups of Phytoplankton and Their Relationship with Environmental Factors in the Restored Uzarzewskie Lake

Kozák

Budzyńska

Dondajewska-Pielka

et al. 2020

Water

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Uzarzewskie Lake is a small, postglacial lake, located in western Poland. The lake is under restoration treatment since 2006. At first, iron treatment was done for 2 years. In the second stage, spring water was directed into the hypolimnion in order to improve water oxygenation near the bottom sediments. The purpose of our research was to determine changes in the contribution of functional groups to the total number of taxa and total biomass of phytoplankton due to changes in the physical and chemical characteristics of the restored lake. Phytoplankton composition was analyzed in three periods: (1) before restoration; (2) during the first method of restoration; and (3) when the second method was implemented in the lake. Epilimnetic phytoplankton was sampled every year monthly from March to November. The relationship between phytoplankton groups and environmental factors (water temperature, ammonium nitrogen, nitrate nitrogen, dissolved phosphorus, conductivity and pH) was examined, using the canonical analyses. The redundancy analysis indicated that the temperature, dissolved phosphates concentration, ammonium nitrogen and pH were the main determining factors of the phytoplankton community dynamics. During the study, 13 coda dominated the phytoplankton biomass. Cyanobacteria of the codon H1 with such species as Aphanizomenon gracile, Dolichospermum planctonicum, D. viguieri dominated the phytoplankton community before restoration. S1 group consisting of Planktolyngbya limnetica, Limnothrix redekei and Planktothrix agardhii mostly dominated during the period in which the first method was used. Improvement of water quality due to restoration efforts in the third period caused dominance of other groups, especially J (Actinastrum hantzschii and other Chlorococcales), C (Asterionella formosa and other diatoms), Y (Cryptomonas marssonii and other cryptophytes), Lo (Peridiniopsis cunningtonii and other dinophytes) and X2 (Rhodomonas lacustris).

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Water pollution due to a harmful algal bloom: a preliminary study from two drinking water reservoirs in Kandy, Sri Lanka

Cited by 8 publications

References 6 publications

Quantitative observations of Cyanobacteria and Dinoflagellata in reservoirs of Sri Lanka

Quantitative observations of Cyanobacteria and Dinoflagellata in reservoirs of Sri Lanka

Distribution of <em>Cylindrospermopsis raciborskii</em> (Cyanobacteria) in Sri Lanka

Functional Groups of Phytoplankton and Their Relationship with Environmental Factors in the Restored Uzarzewskie Lake

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