Refine your search
Collections
Co-Authors
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Sharma, Shweta
- Toxic Effects of Aluminium and Fluoride on Planktonic Community of the Microcosms
Abstract Views :134 |
PDF Views:0
Authors
Affiliations
1 Department of Botany, University of Rajasthan, Jaipur-302 004, IN
2 Department of Zoology, University of Rajasthan, Jaipur-302 004, IN
1 Department of Botany, University of Rajasthan, Jaipur-302 004, IN
2 Department of Zoology, University of Rajasthan, Jaipur-302 004, IN
Source
Nature Environment and Pollution Technology, Vol 12, No 3 (2013), Pagination: 523-528Abstract
Aluminium and fluoride were found toxic to phytoplankton, periphyton and zooplankton in the microcosms raised in the greenhouse. The toxicity of aluminium was relatively higher than fluoride, more particularly, during winter season. There were significant reduction in counts of phytoplankton (49-80%), periphyton (algae = 40-68%, zooplankton = 35-75%) and zooplankton (5-77%) in the treatments in comparison to controls. As a result, Reciprocal Simpson index, Equitability index and Shannon- Weiner index decreased. Such changes will affect energy flow in the microcosms.Keywords
Aluminum, Fluoride, Phytoplankton, Zooplankton, Microcosms.- Acute and Chronic Toxicity of Aluminium Fluoride to Flora and Fauna in a Microcosm
Abstract Views :182 |
PDF Views:0
Authors
Shraddha Jain
1,
Shweta Sharma
2,
Aruna Rajawat
1,
Neha Upreti
1,
Subhasini Sharma
2,
K. P. Sharma
1
Affiliations
1 Department of Botany, University of Rajasthan, Jaipur-302 055, Rajasthan, IN
2 Department of Zoology, University of Rajasthan, Jaipur-302 055, Rajasthan, IN
1 Department of Botany, University of Rajasthan, Jaipur-302 055, Rajasthan, IN
2 Department of Zoology, University of Rajasthan, Jaipur-302 055, Rajasthan, IN
Source
Nature Environment and Pollution Technology, Vol 11, No 1 (2012), Pagination: 7-15Abstract
During acute toxicity study of aluminium fluoride, Daphnia similis L. was found to be the most sensitive organism (EC50 = 108.06 ppm) followed by Gambusia affinis Baird and Gerard (LC50 = 354.0 ppm) and Lemna aequinoctialis L. (EC50 for chlorophyll = 358.7ppm). The exposure (60 days) of producers and consumers at its sub-lethal concentration (35.4 ppm) casted toxic effects on them in artificial microcosms raised in the greenhouse. There was reduction in chlorophyll content (19-39%), dry weight (16%), acid phosphatase (ACP) (56%), alkaline phosphatase (ALP) (14%) and protein content (53%) of Ceratophyllum demersum L. The reduction in species richness (40%) and phytoplankton counts (counts = 47-54%) was significant during the study period while zooplankton counts (30%) in the first half of the study (day-30). Snail mortality was found nil while that of fish was moderate (37%). Their tissue biochemistry (ACP, ALP and protein content) was, however, altered significantly suggesting them to be under stress. AlF3 also had cytotoxic effects in fish decreasing RBC counts (19%) and causing morphological abnormalities. From these findings, we conclude that there are significant toxic effects of aluminium fluoride to organisms in the food web of aquatic ecosystems.Keywords
Acute and Chronic Toxicity, Aluminum Fluoride, Microcosm, Plankton, Snail, Fish.- Factors Affecting Degradation and Decolourisation of an Azo Dye, Methyl Red, in Fixed Film Bioreactors
Abstract Views :98 |
PDF Views:1
Authors
Affiliations
1 Department of Botany, University of Rajasthan, Jaipur-302 004, Rajasthan, IN
2 Department of Zoology, University of Rajasthan, Jaipur-302 004, Rajasthan, IN
1 Department of Botany, University of Rajasthan, Jaipur-302 004, Rajasthan, IN
2 Department of Zoology, University of Rajasthan, Jaipur-302 004, Rajasthan, IN