Studies on Seasonal and Spatial Distribution of Zooplankton Communities and Their Diversity Indices at Chashma Lake, Pakistan

Ayub, Huma; Ahmad, Iftikhar; Shah, Syed Lal; Bhatti, Muhammad Zafarullah; Shafi, Nuzhat; Qayyum, Mazhar

doi:10.17582/journal.pjz/2018.50.4.1293.1298

Cited by 2 publications

(3 citation statements)

References 6 publications

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“…This physical parameter is very important for all aquatic organisms. It may indicate the water purity due to direct diffusion from air and photosynthetic activity of autotrophs [11]. During the studied months the zooplankton diversity significantly differed, compared with total diversity for the whole researched months in both of channels [29].…”

Section: Discussionmentioning

confidence: 93%

“…Last but not least it can provide important indication of hydrological changes or ecosystem disturbances [10]. So far, little work has been done on the zooplankton of artificial channels, especially between the basins of eastern and western Europe However, some similar investigations determining zooplankton species in relation to environmental variables have been carried out [11]- [14]. The aim of study was described and compared a seasonal zooplankton composition along with changes in physicochemical and biological properties.…”

Section: Introductionmentioning

confidence: 99%

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The influence of environmental variables on diversity of spring zooplankton in the artificial Bydgoszcz Channel: a case study.

Kolarova

Napiórkowski

2020

Proceedings of 5th International Electronic Conference on Water Sciences

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The Bydgoszcz Channel is an important artificial channel connecting two of the largest rivers and their catchments in Poland and in central Europe, the Vistula and Odra. It is also the main vector connecting the Noteć River from the East and near the mouth to Brda river from the West. Except for hydrography the Bydgoszcz Channel is also an interesting artificial river from the ecological point of view. In present study we identified and compared the zooplankton community along with physico-chemical and biological properties. Water samples were collected on Bydgoszcz Channel and Noteć Channel monthly during the spring (April 2019 to June 2019). We investigated how the flow of the channel and its tributary affected the various physico-chemical and biological conditions (including water temperature, water transparency, dissolved oxygen, saturation, conductivity, pH, nitrate, phosphate and Chl-a concentration). These analysed parameters in turn affected the seasonal variations of zooplankton diversity (T) and density (N). The zooplankton community was dominated by rotifers and crustaceans. During May we recorded the highest rotifer density (N Rot) 2090 ind/L in Bydgoszcz Channel with an average 1256 ind/L and highest rotifer diversity (T Rot) of 20 species. The most dominant were Keratella cochlearis, Keratella quadrata, Polyarthra dolichoptera. The highest crustacean density (N Crust) was recorded during June on Bydgoszcz Channel 1420 ind/L with an average of 564.5 ind/L and diversity (T Crust) of 8 species recorded from Noteć Channel. The most dominant species among crustaceans was the cladoceran Bosmina longirostris. We assume that the crustacean diversity, density and biomass increased due to increasing temperature. On the contrary, the rotifers species decreased. It follows that adult copepods and their larval stages copepodites could eat small rotifers causing a decline in the number of rotifers. It is also possible that the decline in rotifer numbers could have been caused by competition for food with the Cladocera.

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Section: Discussionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

The influence of environmental variables on diversity of spring zooplankton in the artificial Bydgoszcz Channel: a case study.

Kolarova

Napiórkowski

2020

Proceedings of 5th International Electronic Conference on Water Sciences

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“…Cheng et al (2012) recorded high fish species richness in those areas which are occupied by vegetation. Moreover, Tang et al (2015) and Ayub et al (2018) stated that eutrophication leads to an increase in phytoplankton and zooplankton, thus increasing food and prey availability for many fish species. In the temporal condition (Fig.…”

Section: Discussionmentioning

confidence: 99%

Ichthyodiversity and conservation importance of the Jakhor Taal Lake in Kailali district, far western Nepal

Singh

Bhattarai²

2021

JAD

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Jakhor Taal is an ox-bow perennial lake, situated in Dhangadhi sub-metropolitan city in Kailali district, Nepal. The present study focuses on the factors determining fish diversity, socio-economic status of fishing communities and conservation challenges of Jakhor Taal. Fish sampling was done by gill net, cast net and other local fishing techniques such as Helka and Tiyari nets and Dhadiya trap. A total of 24 fish species (8 exotic and 16 native) were recorded belonging to 7 orders, 14 families and 22 genera. The order Cypriniformes was found to be highest, obtaining 41.66% of the total fish species recorded and 65.38% of total fish caught during the study period (February 2019 -August 2019) followed by Siluriformes (20.33%) and Perciformes (16.67%), respectively. The Shannon-Weiner diversity index was found highest (2.93) in winter (February) and lowest (2.76) in summer (July). Similarly, the Simpson and Evenness values were also found slightly higher during winter (February) in comparison to summer (July). The Shannon-Weiner diversity index was found highest (2.73) at station II in comparison to station I, III, and IV where it was 2.31, 2.09, and 2.04, respectively. Results from the Redundancy analysis (RDA) revealed that the environmental variables such as water temperature, depth and dissolved oxygen were found to be highly significant to most of the fish species at different stations and months. However, pH and free CO2 was not shown to have any relationship or significance. Altogether, 22 clusters were formed in which exotic species show highly significant clustering in comparison to native species. The socio-economic status of the local fishing communities is below the poverty line and the lake and its fishing resources play vital roles in their diet and income source. In the context of conservation challenges and implications, this lake is highly neglected by both governmental and local communities and this negatively affects its natural properties through habitat destruction, illegal fishing, urbanization, invasive species, and a general lack of awareness.

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Studies on Seasonal and Spatial Distribution of Zooplankton Communities and Their Diversity Indices at Chashma Lake, Pakistan

Cited by 2 publications

References 6 publications

The influence of environmental variables on diversity of spring zooplankton in the artificial Bydgoszcz Channel: a case study.

The influence of environmental variables on diversity of spring zooplankton in the artificial Bydgoszcz Channel: a case study.

Ichthyodiversity and conservation importance of the Jakhor Taal Lake in Kailali district, far western Nepal

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