Monthly and diurnal variations of limnological conditions of two ponds

Abstract

A study on monthly and diurnal changes of limnological conditions of two ponds was conducted in the Bangladesh Agricultural University campus, Mymensingh. The research work was performed by studying the limnological parameters such as transparency, temperature, dissolved oxygen, free carbon dioxide, pH, total alkalinity, nitrate-nitrogen, phosphate-phosphorus and plankton. Diurnal variations of physico-chemical factors were studied fortnightly at 6 hrs intervals at 6 a.m., 12 noon, 6 p.m. and 12 midnight. The amounts of transparency, dissolved oxygen and pH were higher during winter months than in summer months in both the ponds. Transparency, water temperature, total alkalinity, NO3-N and PO4-P were higher during summer months than in winter months in both the ponds. But the amount of free carbon dioxide was higher during winter months than in summer months in pond 1 while in pond 2 the amount of free carbon dioxide was higher during summer months than in winter months. Qualitative and quantitative monthly variations of phytoplankton and zooplankton were observed in both the ponds during the study period. The highest amount of dissolved oxygen, pH and total alkalinity were recorded at 6 p.m. and the lowest amounts of those at 6 a.m. in both the ponds. The highest temperature was recorded at 12 noon and the lowest at 12 midnight. But the highest amount of free carbon dioxide was recorded at 6 a.m. and the lowest at 6 p.m. in both the ponds. All the factors showed appreciable diel variations throughout the study period, which indicate that the ponds are productive.Int. J. Agril. Res. Innov. & Tech. 7 (1): 14-20, June, 2017

Analysis of selected physico-chemical parameters of two ponds of Madhubani

“…Here in cold water oxygen dissolved maximum than the warmer water. Present findings are in agreement with the findings of Sahni and Yadav (2012), Mohan et al, (2013), Mazumdar andDutta (2014), Quareshimatva et al, (2015), Rahman et al, (2017) and Durge et al, (2018).…”

“…In the pond near R.K. College may be due to the release of sewage from the surrounding areas. Present findings corroborate with the findings of Singh (2010), Biswas et al, (2011), Thirupathaiah et al, (2012), Yadav et al, (2013), Singh (2014), Reddy et al, (2015), Uddin et al, (2016), and Rahman et al, (2017). At low concentration chloride ions are harmless but at higher concentration it can harm the aquatic organisms.…”

“…During winter these particles generally settle down, so maximum transparency was observed. Similar, results have been observed by workers like Sahni and Yadav (2012), Rahman et al, (2017), Sharma et al, (2017), Durge et al, (2018) etc. Therefore, these findings authenticate the present findings.…”

“…Results of these works are eye opener. Some of them may be cited here, Pejawar et al, (2004), Charkhabi and Sakizadeh (2006), Smitha et al, (2007), Kiran (2010), Mahananda et al, (2010), Singh (2010), Biswas et al, (2011), Kedar and Patil (2011), Srivastva and Srivastva (2011), Barai and Kumar (2012), Sahni and Sheela (2012), Verma et al, (2012), Tirupathaiah et al, (2012), Bhatnagar and Devi (2013), Mishra et al, (2013), Mohan et al, (2013), Patel and Parikh (2013), Prasath et al, (2013), Srivastva and Kanungo (2013), Tank and Chippa (2013), Yadav et al, (2013), Mazumdar and Dutta (2014), Mishra et al, (2014), Nag and Gupta (2014), Singh (2014), Dixit et al, (2015), Paul et al, (2015), Reddy et al, (2015), Qureshimatva et al, (2015), Swarnkar and Chaubay (2016), Uddin et al, (2016), Balkrishnan et al, (2017), Goswami et al, (2017), Rahman et al, (2017), and Durge et al, (2018). Keeping these ideas in mind the present work was planned to study the physico-chemical parameters of two ponds of Madhubani district.…”

Zooplankton abundance, diversity and its relationship with physicochemical parameters of three ponds in Chittagong University campus, Bangladesh

“…In Bangladesh and India some research works were done on the zooplankton diversity and their abundance in pond water by different authors (Roy et al [3] , Kumar et al [4] , Islam and Chowdhury [5] , Manoharan et al [6] , Rahaman et al [7] . and Dhanasekaran et al) [8] .…”