A vector indicating the species group(s) for which to calculate Shannon and Weaver diversity index, Pielou's evenness index and Soyer's (1980) frequency index showed certain interesting features. This means that diversity is low in this lake, which is a sign of more pollution. This indicates that members of the chlorococcales were more dominant and Cyanophyceae were least. Can. J., 1980. A mathematical theory of Communication. Frequency Index and Quantitative Diversity Dominance Index: Shannon Weaver and Pielou's Evenness Index: To elucidate the community structure in each of the lakes Soyer's (1970), Frequency Index (f %), Bellan Santin's (1969) Quantitative dominance index (DI%) were calculated. For more information on customizing the embed code, read Embedding Snippets. Rao, V.N.
The main parameter in the index is the number of genera of phytoplankton in a water body and is calculated using the mathematical formula. This indicates that the members of the Bacillariophyceae are more abundant and Cyanophyceae and Euglenophyceae were not prominent in this lake.
ISBN 0-471-68925-4, Other biodiversity indicators: allBiodiversity,
A total of 91 species were recorded in Shettylake while 63 species were recorded in Hadhinaru lake. The algal biodiversity has been studied and diversity indices have been discussed. quantative de la franch Superiore) Recherche , France . For each sample collected, 25 ml of 4% formaldehyde was added (Welch, 1948) with few drops of Lugol's iodine.
2002). It is mathematically termed as diversity index, means a measure of biodiversity. Boyd, C.E., 1981. ©Sydney Harris. The evenness index does not vary much. management.
Urban 101 107. X included in each group. These observations were at random and were repeated four times for each sample. For each species, multiply its proportion “P (i)” by natural logarithm of that proportions lnP (i), sum across species and multiply the result by minus one. The distribution of phytoplankton in both lakes, Shetty lake and Hadinaru lake is presented in Table 1. The highest Soyer's Index of frequency was recorded for Achanthes inflata (91%), Cateria sp, Closterium Cambrium, Desmidium (100%), Gomphonema subapiculatum . In this system species are different only when their abundance is different. London. Species Evenness is the measurement of the relative abundance of different species, in a way to show the richness of the area. A dataframe of fishery independent data derived from research vessel Shetty lake is located at 12º 14' 14'' North longitude and 76º 39' 37'' East latitude at an attitude of 701.6 meters HMSL.
The next frequently recorded organisms were Cymbella bharathenesis (83%) and those between 75% and 66% included Amphora ovalis, Arthrodesmus, Coelastrus chodati, Cyclotella meheghimiana, Diatoma laifor, Docidium sp and Synedre ulna. Bundy A, Gomez C, Cook AM. Pielou, E.C., 1975. The Shannon and Weaver (1949) index was estimated by, Where S = total individual number of species and, N = Total individual number of all species and pi = S/N.
Sedimentation was done in glass columns. It is situated 4 kms away from Mysore city, in the Mysore Ooty road.
Calculates Pielou's measure of species evenness, i.e. Water Quality in warm water Fish ponds, Craft master printers Alabama . It is located at 12º 02' 02" North longitudes 76º 41' 38" East latitude at an altitude of 653.35 meters HMSL. heips, hillN1, 3.
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