Correlation among trace metals in Tilapia (&lt;i&gt;Oreochromis niloticus&lt;/i&gt;), sediment and water samples of lakes Awassa and Ziway, Ethiopia

Nigussie, Kebede; Chandravanshi, Bhagwan Singh; Wondimu, Taddese

doi:10.4314/ijbcs.v4i5.65544

Cited by 11 publications

(14 citation statements)

References 24 publications

(39 reference statements)

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“…The concentration of Co and Cd of Lake Ziway sample in this study was comparable with that of Nigussie et al [31] in the lake area, however Cr was much higher while Cu was lower in this study (Table 7). Compared with the Bellandur Lake in India, levels of Cu, Zn and Pb in Lake Ziway were lower while that of Cr and Cd were higher in this study.…”

Section: Comparison Of Metals In Irrigation Water With Literature Valsupporting

confidence: 90%

Concentration levels of major and trace metals in onion (<i>Allium cepa</i> L.) and irrigation water around Meki Town and Lake Ziway, Ethiopia

Kitata¹,

Chandravanshi²

2012

Bull. Chem. Soc. Eth.

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ABSTRACT. The levels of major (Na, K, Ca and Mg), trace (Cu, Co, Cr, Mn, and Zn), and toxic (Cd and Pb) metals in onion (Allium cepa L.) bulbs and irrigation water were determined by flame atomic absorption spectroscopy (FAAS). Dissolution of onion samples was carried out by wet digestion with a total volume of 2 mL HNO3 (69−72%) and 2 mL HClO4 (70%) mixture in a flask fitted with reflux condenser on Kjeldahl heating apparatus. The levels of major metals were Na (208 and 121 µg/g), K (3127 and 3298 µg/g), Ca (599 and 550 µg/g) and Mg (516 and 407 µg/g) in onion irrigated with water from well and Lake Ziway, respectively. Among the trace metals (µg/g dry weight), Zn was the highest (18 and 14) followed by Mn (8.8 and 13), Cr (4.9 and 6.6), Cu (3.2 and 3.6), and Co (1.2 and 1.8) in onion irrigated with water from well and Lake Ziway, respectively. The toxic metal Cd was 0.6 and 0.5 µg/g in onion irrigated with well and lake waters, respectively, while Pb was below method detection limit. The levels of Na, K, Ca and Mg detected in well water and the Lake Ziway water used for irrigation were (9.4, 4.6 mg/L), (43, 13 mg/L), (23, 10 mg/L) and (30, 8.6 mg/L), respectively. Higher levels of Zn (0.08 mg/L) and Co (0.06 mg/L) were found in the lake water while higher Mn (1.1 mg/L) and Cr (0.44 mg/L) in well water. The toxic metal Pb in both well and Lake Ziway water, and Cd in well water samples were below the method detection limits. Mn in well water and Cr in both water samples exceeded the FAO limit of maximum recommended level in irrigation waters.

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Section: Comparison Of Metals In Irrigation Water With Literature Valsupporting

confidence: 90%

Concentration levels of major and trace metals in onion (<i>Allium cepa</i> L.) and irrigation water around Meki Town and Lake Ziway, Ethiopia

Kitata¹,

Chandravanshi²

2012

Bull. Chem. Soc. Eth.

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“…The impacts of this phenomenon were also observed in such phenomenon as death of livestock and deterioration of the quality of irrigated vegetables (Abay, ; Desta, ). The bioaccumulation loads of trace metals to Lake Hawassa, which were taken from fish organs, sediments and water samples (Nigussie, Chandravanshi, & Wondimu, ), exhibited higher concentrations than the nearby Lake Ziway. This finding indicates the lake has deteriorated in terms of its physical, chemical and biological elements, highlighting an urgent need for implementation of a multitude of biological tools to assess the ecological quality of the lake.…”

Section: Introductionmentioning

confidence: 99%

Effects of anthropogenic activities on macroinvertebrate assemblages in the littoral zone of Lake Hawassa, a tropical Rift Valley Lake in Ethiopia

Wondmagegn

Mengistou

2020

Lakes & Reservoirs

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In developing tropical countries, the littoral region of lakes is exposed to high human pressures, and the degradation effects are more evident on riparian vegetation and macrophytes. Human impacts on other biological entities, such as plankton and macroinvertebrates, are rarely investigated and reported. The present study focuses on assessing the effects of habitat disturbance on the littoral macroinvertebrate assemblages in Lake Hawassa, Ethiopia. Samples were taken from February to November 2015/16 from 12 sampling sites purposefully selected on the basis of percentage disturbance score (PDS) and categorized into minimally disturbed (four sites), moderately disturbed (five sites) and highly disturbed (three sites). Macroinvertebrate samples were collected from each site using a D‐frame net of 500 µm, with both in situ measurement and laboratory analysis of the environmental variables being conducted. A total of 23,051 macroinvertebrates belonging to 43 families were identified. Analysis of similarities (ANOSIM) and non‐metric multidimensional scaling (NMDS) analyses revealed significantly different macroinvertebrate assemblages among the disturbance levels (ANOSIM: p = .004, R = .55). Variables such as Biological Monitoring Working Party, Shannon diversity index, Ephemeroptera and Trichoptera (ET) family richness, and family richness exhibited a flawless pattern of decrease with increasing human disturbances and a negative correlation with nutrients. The reduction of these metrics for highly disturbed sites was attributable to the deterioration of vegetation and bottom substrate qualities, increasing stormwater inputs, lack of buffer zones and well‐planned land use induced by human interventions. It was evident anthropogenic activities in and around the littoral zone of the lake contributed to the degradation of habitat quality and decreased macroinvertebrate richness and abundance. Thus, effective lake management practices are recommended to rehabilitate the degraded littoral habitat quality in order to realize the sustainable use of this natural resource.

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“…Although a number of studies are being conducted in the Lake Ziway area catchment, most of them focussed on studying the hydro-geochemistry of waters around Lake Ziway by analysing samples from groundwater and surface waters using only a single measurement (Gashaw 1999 ), and on determining the low molecular mass (LMM) trace element species in the Ethiopian CRV lakes including Lake Ziway (Masresha et al 2011 ). Others focus on the heavy metals and organochlorine pesticides present in fish species, sediment and water samples and the correlations between them (Nigussie et al 2010 ; Dsikowitzky et al 2012 ; Yohannes et al 2014 ). These studies detected e.g.…”

Section: Introductionmentioning

confidence: 99%

Impacts of nutrients and pesticides from small- and large-scale agriculture on the water quality of Lake Ziway, Ethiopia

Teklu

Hailu

Wiegant

et al. 2016

Environ Sci Pollut Res

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The area around Lake Ziway in Ethiopia is going through a major agricultural transformation with both small-scale farmers and large horticultural companies using pesticides and fertilisers at an increased rate. To be able to understand how this influences the water quality of Lake Ziway, water quality data was gathered to study the dynamics of pesticide concentrations and physicochemical parameters for the years from 2009 to 2015. Results indicate that for some physicochemical parameters, including pH, potassium and iron, over 50 % of the values were above the maximum permissible limit of the Ethiopian standard for drinking water. The fungicide spiroxamine poses a high chronic risk when the water is used for drinking water, while the estimated intake of diazinon was approximately 50 % of the acceptable daily intake. Higher-tier risk assessment indicated that the fungicide spiroxamine poses a high acute risk to aquatic organisms, while possible acute risks were indicated for the insecticides deltamethrin and endosulfan. Longer-term monitoring needs to be established to show the water quality changes across time and space, and the current study can be used as a baseline measurement for further research in the area as well as an example for other surface water systems in Ethiopia and Africa.Electronic supplementary materialThe online version of this article (doi:10.1007/s11356-016-6714-1) contains supplementary material, which is available to authorized users.

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Correlation among trace metals in Tilapia (<i>Oreochromis niloticus</i>), sediment and water samples of lakes Awassa and Ziway, Ethiopia

Cited by 11 publications

References 24 publications

Concentration levels of major and trace metals in onion (<i>Allium cepa</i> L.) and irrigation water around Meki Town and Lake Ziway, Ethiopia

Concentration levels of major and trace metals in onion (<i>Allium cepa</i> L.) and irrigation water around Meki Town and Lake Ziway, Ethiopia

Effects of anthropogenic activities on macroinvertebrate assemblages in the littoral zone of Lake Hawassa, a tropical Rift Valley Lake in Ethiopia

Impacts of nutrients and pesticides from small- and large-scale agriculture on the water quality of Lake Ziway, Ethiopia

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