Diversity and community structure of aquatic insects in a pond in Midnapore town, West Bengal, India (original) (raw)
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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.
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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.
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A Study on the Diversity of Aquatic Insect Communities of Kaliabor Subdivision, Nagaon, Assam
Aquatic insects holds an important place in the ecology of freshwater ecosystem. The present study deals with the aquatic insects survey conducted from January 2018-March 2018 in three permanent water bodies of kaliabor, Nagaon district, Assam. During the study all total 28 species of aquatic insects have been recorded belonging to six order and 18 family. Different group of insects have different tolerance to the quality of the water in which it lives. Due to the diversity of insects, each different group relies on a different set of conditions in order to survive. According to this study order Hemiptera represents the highest number of species (Nine families including 15 genera). Coleoptera (three families including four genera.), Odonata (two families including four genera) Diptera(two families including two genera) Ephemeroptera (one family including two genera), Hymenoptera(one family including one genera) were recorded during this work. Water quality parameters in the three sites don't show significant differences. Dissolved oxygen is found to be highest in Solong beel and also the total number of insects species present are high at this site followed by Kolong river and Jaysagar doloni.
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DIVERSITY AND DISTRIBUTION OF AQUATIC INSECT POPULATION IN LAKHA BANJARA LAKE, SAGAR (M. P.), INDIA
Freshwater lakes are integral part of aquatic ecosystem and provide numerous benefits to human beings directly or indirectly. Aquatic insects are the primary bio-indicators of freshwater bodies such as lakes, ponds, wetland, streams and rivers. The presence or absence of certain families of aquatic insects can indicate whether a particular water body is healthy or polluted, because they cannot escape pollution and show the collective effects of short and long term pollution events. An investigation was carried out to study the aquatic entomofauna, their diversity and distribution in eight stations of LakhaBanjaralake of Sagar (M. P.) for a period of six months from July 2014 to December 2014. The aquatic insects were sampled systematically and randomly in station-wise habitats, using standard protocols. A total of 2207 individuals representing 12 species belonging to 12 genera, 10 families and 4 orders were recorded. Among the collected insects Hemiptera ranked first with the large population of individuals and percentage (87%). The orders followed by Hemiptera in their number and percentage were Coleoptera (7%), Odonata (4%) and Diptera (2%).
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A study was carried out on the diversity and density of aquatic insect community in the two urban temple ponds – Radhamadhav akhra pond and Mandir dighi pond of Silchar town, Assam, Northeast India. All total 22 taxa of aquatic insects were recorded, 13 taxa from Radhamadhav akhra pond and 18 taxa from Mandir dighi pond. 9 taxa were found common in both the ponds. In Radhamadhav akhra pond classical relationship of dissolved oxygen and free carbon dioxide was established with low dissolved oxygen and high free carbon dioxide concentration. Pearson correlation coefficient analysis showed that the number of taxon was highly correlated with the density of taxon in both the ponds. Canonical correspondence analysis revealed that for Radhamadhav akhra pond, eigen values were 0.784 for axis 1 and 0.630 for axis 2 while for Mandir dighi pond eigen values were 0.825 for axis 1 and 0.740 for axis 2. Taxonenvironment correlation showed that aquatic insect community and environmental variables were highly correlated in both the ponds. Shannon diversity index of Radhamadhav akhra pond was in the range of 1.5−1.7 and Mandir dighi pond was in the range of 1.9−2.0. According to the dominance status by Engelmann’s Scale, only Rhagovelia sp. was found Eudominant in Radhamadhav akhra pond. No eudominant taxon was found in Mandir dighi pond.
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2017
A study was conducted on aquatic insect community of Dibru River at three sites, Guiijan ghat (DS1), Kaliapani ghat (DS2) and Khantigwali ghat (DS3) of Dibrugarh district near Dibru Saikhowa National Park. The sampling of aquatic insects and water was done in replicates during September 2014-2015. The study recorded 4 orders, 8 families, 12 genera and 12 species of aquatic insects. Highest density of order Hemiptera was recorded in pre monsoon and lowest and same density was recorded of order Odonata and Coleoptera in monsoon and winter. Seasonal variations of environmental variables of water were found moderate. Density of aquatic insects showed significant negative relationship with phosphate. The study revealed low Shannon Weiner Diversity Index values of aquatic insects (Shanon H<1) in all the sites indicating perturbed conditions of water. Canonical Correspondence Analysis (CCA) showed that the species environmental correlations of axis 1 and axis 2 were high.
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Diversity of aquatic insects in Semara Taal, a wetland of district Siddharthnagar, U.P
2020
The present study deals with the aquatic insects survey conducted from March 2018 to May 2018 in Semara Taal. This study enumerated 20 different species belonging to 6 orders and 19 families. Order Hemiptera represent the highest number of species (8 genera) followed by Diptera (4 genera), Coleoptera (3 genera), Odonta (2 genera), Ephemeroptera (2 genera), and Trichoptera (single genus). Dominance of Hemipteran, Odonata and Coleoptera insects suggested that the Semara taal is relatively less polluted.
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