Arpita Dalal | ASSAM UNIVERSITY (Diphu Campus) (original) (raw)
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A study was carried out on the diversity and density of aquatic insect community in the two urban... more 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.
This paper represented a preliminary three months data on the aquatic insect diversity of two pon... more This paper represented a preliminary three months data on the aquatic insect diversity of two ponds, one private property pond and one community pond of Irongmara village, district Cachar, Assam. The community pond (pond1) was characterized by market and household waste disposal site and the private pond (pond2) was characterized by a community fishery. A total of 16 families belonging to 5orders from pond 1 and 9 families belonging to 4 orders from pond 2 were recorded. The insect order Diptera was found to be abundant and dominant in pond1, while in pond2 the order Hemiptera was found more abundant and dominant. Dissolved oxygen of water on pond1 was found very low with high Free-CO2 and Electrical Conductivity while in pond2 the dissolved oxygen was found in good concentration with low Free-CO2 and Electrical Conductivity. Different biomonitoring scores were computed to see the water quality of the ponds and statistical analyses were done to find the relationship of environmental variables with insect density and family richness. The present study compared the water quality of the two types of ponds and concluded that the authorities, management and users should come forward with protective measures to save the ponds from deterioration.
A study was carried out on the diversity and density of aquatic insect community in the two urban... more 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.
This paper represented a preliminary three months data on the aquatic insect diversity of two pon... more This paper represented a preliminary three months data on the aquatic insect diversity of two ponds, one private property pond and one community pond of Irongmara village, district Cachar, Assam. The community pond (pond1) was characterized by market and household waste disposal site and the private pond (pond2) was characterized by a community fishery. A total of 16 families belonging to 5orders from pond 1 and 9 families belonging to 4 orders from pond 2 were recorded. The insect order Diptera was found to be abundant and dominant in pond1, while in pond2 the order Hemiptera was found more abundant and dominant. Dissolved oxygen of water on pond1 was found very low with high Free-CO2 and Electrical Conductivity while in pond2 the dissolved oxygen was found in good concentration with low Free-CO2 and Electrical Conductivity. Different biomonitoring scores were computed to see the water quality of the ponds and statistical analyses were done to find the relationship of environmental variables with insect density and family richness. The present study compared the water quality of the two types of ponds and concluded that the authorities, management and users should come forward with protective measures to save the ponds from deterioration.