Cyclomorphosis of fresh water rotifers from wetlands of contrasting ecological feature – seasonal analysis
Journal Title: Journal of Biodiversity and Environmental Sciences (JBES) - Year 2016, Vol 8, Issue 5
Abstract
Cyclomorphosis, an interesting biological phenomenon involves the alteration of different of morphs in time. Various eco-biological parameters including temperature, Dissolved Oxygen, pH, alkalinity, turbidity and nutrients (total phosphate phosphorus and total nitrogen) along with meteorological changes may have a role in inducing this survival strategy of phylum Rotifera. The primary aim of this study is to test the hypothesis that the morphological variations of various species of Rotifers occur due to environmental oscillations pertaining to different seasons of a year in different contrasting ecoregions. This manifestation of phenotypic plasticity in two different species of rotifers (Brachionus sp. and Keratella sp.) was studied from three wetlands having contrasting ecological features over a period of one year. Simultaneous recording of physico-chemical parameters and computing their relationships with the density of cyclomorphic forms were also done. Cyclomorphic forms of Brachionus sp. were found mostly during summer season while that of Keratella sp. species occurred during late monsoon and winter season. Rooted aquatic macrophytes were observed to display inverse relationship with the abundance of cyclomorphic forms of Brachionus sp. Recording of proportion of body length and posterior spine length in Keratella sp. revealed the appearance of longest posterior spine length during winter and the development of posterior spines tended to become smaller in eutrophicated water body. We concluded that high temperature, availability of nutrients and turbulence of water triggered the cyclomorphic or polymorphic development of various species of Rotifers.
Authors and Affiliations
Subhasri Middya, Susanta Kumar Chakraborty
Keywords
Related Articles
- EP ID EP38814
- DOI -
- Views 177
- Downloads 0
Wheat /faba bean intercropping system in perspective
In the United Kingdom (UK) and other areas with similar growing conditions wheat (Triticum aestivum L.) /faba bean (bean; Vicia faba L.) intercropping system has been shown to be promising. However, wheat/ bean intercr...
The morphology, anatomy and physiology characterization of mutant wheat (Triticum aestivum L.) “Alibey” in tropical lowland area
The performance information necessary to determine mutant wheat mutant traits in the breeding program of activities to increase production. The aim of this research was to obtain variability that could be used as select...
Study of phosphorus compounds adsorption efficiency in sewage resources by using langmuir and freundlich equitation from ecological prospective
Phosphorus is the main nutrient responsible for eutrophication of aquatic ecosystems; therefore, it is important to develop new processes to remove phosphorus from aqueous solutions. In this research, performance, kinet...
Serum Copper and Zinc level as biomarker for dust exposed lung diseases among coal miners
To elucidate the effect of dust exposure, smoking and alcoholic habit on the serum Copper and Zinc activity as prognosis tool for dust linked lung diseases among coal workers. In the present study, serum Copper and Zinc...
Determining the best statistical models for estimating the forage yield of Atriplex canescens (Purush) Nut. in Kahrizak area (Iran)
Determining the grazing capacity of pastures and estimating the yield of pasture plants is one of the most essential cases in planning and managing of pastures. One of the methods for estimating the yield of pasture pl...