Aquatic insect diversity in two temple ponds of Silchar, Assam, N.E. India and their conservation values (original) (raw)
Related papers
Assessment of ecosystem health of two ponds in district Cachar, Assam, India using aquatic insects
Journal of entomology and zoology studies, 2016
An investigation was carried out to compare the insect diversity and ecosystem health of one man made and one natural pond of Cachar District, Assam. Physico-chemical properties of water in the two systems also have been studied. Dissolved oxygen in site 1 which is a man-made pond, was found very low and showed significant positive correlation with pH. Nitrate concentration of site 1 ranged from 0.26 mg/L to 0.54 mg/L and in site 2 (natural shallow water pond) it ranged from 0.14 mg/L to 0.50 mg/L. All total thirteen species were recorded from these two ponds, nine species from site 1 and twelve species from site 2. Five orders, nine families from site 1 and seven orders, twelve families from site 2 were recorded. Shannon H’ less than 1 for each site indicated disturbed condition of water of both the ponds. Shannon H’ showed very high significant positive correlation with transparency. Both the sites were found to be dominated by pollution tolerant species. Different biomonitoring s...
International Journal of Entomology Research, 2024
Twenty five species of aquatic insects have been recorded from a small weed infested water body in Midnapore town, West Bengal, India. Hemiptera was the most abundant order comprising 51.93% of total entomofauna followed by Odonata (16.12%), Coleoptera (15.15%), Ephemeroptera (13.68%) and Diptera (3.12%) in that order. Anisops breddini was the only dominant species along with 11 subdominant, 12 recedent and one sub-recedent species. Most of the species were found to be either positively or negatively correlated with the physico-chemical properties of the water. Existence of 13 species of macrophytes provided ample scope of niche differentiation for the coexistence of the insect species.
Diversity and community structure of aquatic insects in a pond in Midnapore town, West Bengal, India
In total 20 species of aquatic insects have been recorded from a weed infested pond. Odonata was numerically the most abundant group constituting of 54% of the total aquatic insects even though these belonged to three species. Coleoptera though constituted only 22% of aquatic insects had 10 species. Urothemis signata and Ranatra filiformes were eudominant and dominant species respectively. Hydrometra butlen is recorded from West Bengal for the first time. Five species of Hemiptera, Ranatra filiformes, Ranatra elongata, Diplonychus rusticus, Micronecta merope, Gerris nitida and Hydrometra butlen; three species of Odonata, Urothemis signata, Agriocnemis pygmoea and Enllagma parvum and one species of Coleoptera viz., Coplatus indicus have been recorded from Paschim Medinipore district for the first time. Species diversity and evenness indices fluctuated from month to month and from one sampling site to other being <1 suggest a stressed and disturbed environment.
Indian Journal of Biology, 2016
29 species of aquatic insects have been recorded from a weed infested man made wetland near Tamluk Station. Hemiptera was numerically the most abundant group comprising 39% of the total aquatic insects followed by Coleoptera (36%) and Odonata 25%. Hemiptera and Odonata were represented by 10 species each while Coleopteran was represented by 9 species. Of these only one coleopteran species, Canthydrus latitabilis was found to be dominant. The water body under investigation was considered moderately polluted. On the basis of Diversity index, Evenness value and Dominance value indicated the equitability and heterogeneity of the aquatic system. While Coleoptera and Odonata exhibited a peak in July and May respectively but no distinct peak could be seen for Hemiptera. Correlation between the abiotic factors and insect species revealed that abiotic factors had some regulatory effects on aquatic insect population.
Present work has been conducted on two tropical ponds (namely Shershah Suri pond and Moradabad pond) situated in Sasaram city of Bihar to assess its ecological health and trophic status on the basis of water chemistry and insect fauna. Aquatic insects are very significant as indicators of water quality. Total of 49 insect species were recorded from both the ponds during present study. Among all the insect fauna, species belongs to order Coleoptera were recorded their dominance in both the ponds. Physico-chemical and biological results of both the ponds show higher trophic conditions on account of anthropogenic pressure. Water chemistry of Shershah Suri pond reveals degrading condition as compared to Moradabad pond.
Ecology, Environment and Conservation
Diversity of aquatic insects in relation to the physicochemical parameters of the two selected ponds of Bathinda region was studied from December, 2021 to May, 2022. A total of 430 individuals of aquatic insects belonging to five orders were collected and identified (upto genus level). More number of insects was recorded from the pond I as compared to pond II. Number of physical and chemical parameters such as temperature, pH, transparency, total alkalinity, water salinity, dissolved oxygen, total hardness, calcium, magnesium, free carbon dioxide, chloride, ammonium nitrogen and orthophosphate levels were also studied to demonstrate the quality of water.
An investigation was done to study the diversity of aquatic insect community and physico-chemical parameters in Sagar Lake, India. The aquatic insects were collected by using insects net from the study area during the month of November 2013 to October 2014. The aquatic insect community was represented by 10 species, 10 genus, 12 families and 4 orders. The most abundant order was Hemiptera, followed by Coleoptera during study period. Physico-chemical parameters studied were Temperature, pH,
Arthropods, 2023
A study on aquatic insects biodiversity and abundance along with physicochemical parameters of two lentic water bodies (Varuna and Dalvoy) of Mysore district was carried out on monthly basis from October 2018 to March 2019. A total of 31 species belonging to 19 families and 6 orders were recorded during the study period. At order level, Coleoptera showed maximum relative abundance (57%) followed by Hemiptera (13%) in Varuna Lake, while in Dalvoy Lake, the order Hemiptera (66%) was most abundant, followed by Coleoptera (16%). Computation of dominant status of different species of aquatic insects in lakes based on Engelmann's scale revealed that Canthydrus laetabilis and Gyrinus distinctus, from the order Coleoptera, were dominant in Varuna Lake, while two Hemipteran species, Diplonychus rusticus and Anisops sp., were dominant in Dalvoy Lake. The highest Shannon diversity index (2.803) and evenness values (0.66) were recorded in Varuna Lake, which was slightly greater than Dalvoy Lake (2.028 and 0.45). Similarly, the Biological Working Party Score (BMWP) and Average Score Per Taxon (ASPT) values were 80 and 5.33 in Varuna Lake and 53 and 4.08 in Dalvoy Lake. This indicates Varuna Lake is less polluted and has higher species diversity than Dalvoy Lake. In terms of the physico-chemical properties of water, a significant difference was noted in electrical conductivity, total dissolved solids, free carbon dioxide, dissolved oxygen, total alkalinity, hardness, nitrate, sulphate, and chloride concentrations between Dalvoy Lake and Varuna Lake. The results of physicochemical analysis and diversity indices suggest stressed and disturbed water quality conditions at Dalvoy Lake.