Evaluation of the ecological state of the major streams located in Doon valley using diatoms as indicators
Journal Title: Journal of Applied and Natural Science - Year 2018, Vol 10, Issue 1
Abstract
Biological communities reflect overall ecological integrity (i.e. chemical, physical and biological integrity). Since the diatom species exhibit variation in tolerances to physical and chemical change in water, they are excellent indicators changes in their environment. Based on the dominant categories for each characteristic, the ecological state of the stream can be determined. This study evaluates the ecological state of the streams in Doon Valley. The diatom samples collected at regular monthly intervals from the twelve streams located in the eastern and western Doon were treated with acid-peroxide and mounted in Naphrax for species count at x1500. About 250-300 valves of diatom species were counted and Van Dam ecologic values were computed by OMNIDIA ver. 5.3. pH was alkaliphilous (4), salinity - fresh brackish (2) and oxygenation - continuously high (1) for most of the streams. Saprobity and trophic status was largely β-mesosaprobous (2) and eutraphentic (5), respectively. The Leclercq index also shows non-existent (<10%) to low (10-20%) organic pollution, degradation (IDSE=3.5-3.0) and moderate anthropogenic eutrophication (20.1-45%) in most of the streams attributed to urbanization stress (62 MLD sewage). The water quality based on indices; IBD (Indice biologique diatomèes), IPS (Indice de polluo-sensibilite) and TDI (Trophic Diatom Index) showed the moderate water quality in the streams of the Valley. Like EU Water Framework Directive 2000/60/EC (WFD) India should also have the objective to ensure ecosystem integrity through bio-assessment and not just mere pollution control.
Authors and Affiliations
Rajbeer Singh, Prakash Nautiyal, Rachana Nautiyal
Keywords
Related Articles
- EP ID EP287488
- DOI 10.31018/jans.v10i1.1658
- Views 61
- Downloads 0
Exploration of multitrait antagonistic microbes against Fusarium oxysporum f.sp. lycopersici
Fusarium wilt is one of the major diseases of tomato causing extensive loss of production. Exploration of agriculturally important microbes (AIMs) for management of the tomato wilt is an ecofriendly and cost effective ap...
Agro-morphological and quality characterization of indigenous and exotic aromatic rice (Oryza sativa L.) germplasm
For establishment of the distinctness among 64 aromatic rice germplasm, 35 agro-morphological and quality traits were used. Most of the studied traits showed wide variation among the germplasm. Purple colour of auricles...
Rhizosphere competence of native Rhizobium rhizogenes strain and its use in management of crown gall
Native Rhizobium rhizogenes strain UHFBA-212 [141/1A (NCBI: KC488174)]was isolated from rhizosphere soil of peach nursery plant of wild peach collected from Himachal Pradesh. In addition to this,159 isolates were also co...
Influence of seed treatment and packaging materials on seed longevity of cluster bean [Cyamopsistetra gonoloba (L.) Taub.]
An experiment was conducted to investigate the influence of packaging materials and seed treatments on storability of cluster bean under ambient conditions of Bengaluru. The experiment consisted of six treatments viz. co...
Study on the ameliorating effect of aqueous extract of Moringa oleifera on Ganga water
The quality of surface water is deteriorating day by day due to various anthropogenic activities. Ganga water is assumed polluted almost in the entire strech of river. The me-dicinal plants may be useful for amelioration...