Physicochemical conditions in temporary ponds in the New Forest

Khalaf, A. N.; MacDonald, Lisa J.

doi:10.1007/bf00039062

Cited by 8 publications

(6 citation statements)

References 6 publications

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“…The lowest pH values in March in pond 1 and in October in pond 2 might be associated with rainfall, high temperature and presence of high amount of free carbon dioxide. Khalaf and MacDonald (1975), Lakshminarayana (1965), Vyas and Kumar (1968) observed lower values of pH during monsoon. Banerjea (1967) reported that water with an almost neutral pH 6.5 to 7.5 is best suited for fish culture and average production is expected in the range of pH 6.5 to 8.5.…”

Section: Hydrogen Ion Concentration (Ph)mentioning

confidence: 92%

Monthly and diurnal variations of limnological conditions of two ponds

Rahaman

Mansur

Rahman

2017

Int. J. Agril. Res. Innov. & Tech.

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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

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Section: Hydrogen Ion Concentration (Ph)mentioning

confidence: 92%

Monthly and diurnal variations of limnological conditions of two ponds

Rahaman

Mansur

Rahman

2017

Int. J. Agril. Res. Innov. & Tech.

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“…Adaptation to the demanding conditions within ephemeral ponds has enabled a relatively diverse and unique ecology to inhabit them (Williams, 2006). Macroinvertebrates are the largest group recorded in ephemeral ponds (Zacharias et al, 2007), although microcrustacea are also very well represented (Khalaf and MacDonald, 1975). Williams (1997) has suggested there are two principle components to macroinvertebrate communities within ephemeral ponds.…”

Section: Ephemeral Pondsmentioning

confidence: 99%

“…Although the drying of ponds may be a routine hazard that many species have adapted to, the persistence and composition of macroinvertebrate communities may be influenced by other processes such as predation, locating a mate and other physicochemical and spatial parameters as well as hydroperiodicity (Jeffries, 1994;Spencer et al, 1999 Williams, 1996) which occur as water volume declines (in the summer months) and when the basin is initially inundated after the dry phase (Khalaf and MacDonald, 1975). Ephemeral ponds near…”

Section: Local (Physicochemical/biological) and Spatial (Connectivitymentioning

confidence: 99%

Ecological Drivers of Cladoceran Diversity in the Central European City (Łódź, Poland): Effects of Urbanisation and Size of the Waterbody

Pawlikiewicz¹,

Jurasz

2017

Annales Zoologici Fennici

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Ponds are common and abundant features in nearly all landscapes typical of European lowland landscapes yet research on freshwater biodiversity has traditionally focussed on larger waterbodies such as lakes and rivers. This has led to an increased need to understand and quantify the biodiversity associated with pond habitats to better inform the active conservation and management of these small waterbodies. This thesis examines the aquatic macroinvertebrate biodiversity (alpha, beta and gamma) and conservation value of 95 ponds in Leicestershire, UK, across a variety of urban and rural landscape types and at a range of spatial scales. In addition, the relative importance of local (physicochemical and biological) and spatial (connectivity) variables in structuring macroinvertebrate communities within ponds is investigated. At a regional scale, the greatest macroinvertebrate biodiversity and conservation value was recorded within meadow ponds compared to urban, agricultural and forest ponds. Spatially, ponds were highly physically and biologically heterogeneous. Temporally (seasonally), invertebrate communities were most dissimilar in meadow and agricultural ponds but assemblages were similar in urban and forest ponds. In urban landscapes, park ponds supported a greater diversity of invertebrates than 'other' urban or garden ponds and typically had a greater conservation value. Garden ponds were the most taxon poor of those investigated. Perennial floodplain meadow ponds supported a greater biodiversity of invertebrates compared to ephemeral meadow ponds although conservation value was similar. Despite regular inundation from the River Soar, ephemeral ponds supported distinct communities compared to perennial meadow ponds. Aquatic macrophytes supported a higher diversity of taxa than other pond mesohabitats across all landscapes studied. Physicochemical factors were identified to be the dominant influence on macroinvertebrate assemblages although, a combination of local and spatial factors best explained the variation in community composition at a regional scale and for meadow ponds. Spatial factors were not identified to significantly influence urban pond communities. This study highlights the ecological importance and conservation value of ponds in rural and anthropogenically disturbed landscapes. Recognition of the significant contribution of ponds to freshwater biodiversity at regional and landscape scales is important for future conservation of pond habitats and will help focus and direct conservation strategies to where they are needed most.iv

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“…Low DO in summers may be attributed to low solubility of DO at high temperature in summers (Dutta and Patra, 2013; Gupta et al,, 2015) and increased load of organic matter and more consumption of DO for decomposition (Butcher et al, 1937;Thirupathaiah et al, 2012) while increased level of DO in winters may be due to inverse relation of DO solubility and temperature (Jhingaran, 1975;Khalaf and MacDonald, 1975).…”

Section: Dissolved Oxygen (Do)mentioning

confidence: 99%