Multivariate Analysis of Rotifers Community from Safari Zoo Lake Lahore, Pakistan
DOI:
https://doi.org/10.52229/pbmj.v1i1.38Abstract
Rotifers are zooplanktons that react more sharply to the environmental changes. Objective:To better understand the community composition of rotifers in Safari Zoo Lake, Lahore, PakistanMethods: wecollected 16 water samples on monthly basis, dividing lake into four major sites: northern, southern, eastern, and western sites. Each of these was further subdivided into four locations, for a total of 16 sampling sites. A total 23 rotifer species were recorded from the lake with Brachionus calyciflorus having maximum abundance. A species abundance curve was plotted between months and number of species of rotifers indicating their lowest and highest abundance through the study period. Results:A Cluster Analysis yielded three main groups of closely related species including species like Brachionus quadridentatus, Synchaeta stylata and Brachionus calyciflorusetc. We used a Principal Component Analysis (I and II) to study variation in the rotifer community on a seasonal basis and among sampling sites. A biplot of Principal Component Analysis (PCA I) reflected the relationship of rotifers with the months. Some of the species showed a positive positive relationship, while others showed negative one. PCA II was plotted between months and physico-chemical parameters showing their negative and positive relations. Conclusions:We conclude that a lesser replacement of fresh water, increased density of waterfowl, reptilia and solid waste left overduring boating has resulted in eutrophication of lake leading to overall low diversity of rotifers observed
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