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Harminder Pal Singh Daizy R. Batish Kuldip Singh Dogra Shalinder Kaur Ravinder Kumar Kohli Anjana Negi 《Environmental monitoring and assessment》2014,186(6):3379-3389
Lantana camara, an aromatic shrub, native to tropical America, was introduced into India for ornamental hedging, but later escaped and became a serious invasive weed. This study assessed the quantitative and qualitative status of plant community richness and diversity in areas invaded by L. camara in the Siwalik Hills (Himachal Pradesh, India), and explored allelopathy as a possible mechanism of interference. We measured species diversity, richness and evenness of the vegetation in areas invaded and uninvaded by L. camara. Allelopathic effects of L. camara rhizosphere soil and litter were assessed against two native plants—Achyranthes aspera (a herb) and Albizia lebbeck (a tree). Density, biomass and indices of diversity, richness and evenness were reduced by L. camara, indicating a significant alteration in composition and structure of native communities. Seedling growth of the test species was reduced in L. camara rhizosphere- and litter-amended soil. The inhibitory effect was ameliorated by the addition of activated charcoal, indicating the presence of organic inhibitors (quantified as phenolics) in the soil. Lantana invasion greatly reduces the density and diversity of the vegetation in the invaded area, and chemical interference of its litter plays an important role in invasion. 相似文献
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Nirankar Singh Ravinder Agarwal Amit Awasthi Prabhat K. Gupta Susheel K. Mittal 《Atmospheric environment (Oxford, England : 1994)》2010,44(10):1292-1300
Aerosol (total suspended particulate) samples collected at three diverse locations (urban-commercial, semi-urban and rural-agricultural) in Patiala, India were analyzed for loss on ignition (LOI) and organic tarry matter (OTM) content in ambient air during crop residue burning (CRB) episodes and non-crop residue burning (NCRB) months in 2006–2007. Results showed high levels of LOI and OTM during wheat and rice crop residue-burning periods at all the sites. Higher levels were obtained during rice crop residue-burning period as compared to the wheat residue-burning period. At semi-urban site, LOI varied between 53 ± 36 μg m?3 and 257 ± 14 μg m?3 constituting 38–78% (w/w) part of the aerosols whereas levels of OTM varied between 0.98 ± 0.11 μg m?3 and 7.93 ± 2.76 μg m?3 comprising 0.42–3.28% (w/w) fraction. At rural-agricultural area site, levels of LOI varied between 86 ± 40 μg m?3 and 293 ± 70 μg m?3 comprising 27–84% (w/w), whereas OTM levels varied between 1.31 ± 0.64 μg m?3 and 10.09 ± 6.56 μg m?3 constituting 0.83–2.42% (w/w) fraction of the aerosols. At urban-cum-commercial site, levels of LOI and OTM varied between 48 ± 23 μg m?3 and 281 ± 152 μg m?3 and 2.53 ± 1.23 μg m?3 and 17.40 ± 8.50 μg m?3, constituting 24–62% (w/w) part of the aerosols, respectively. Results also indicated that OTM and LOI were integral parts of aerosols and their concentrations were influenced by the crop residue burning practices with incorporated effect of vehicular activities in Patiala. 相似文献
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Singh Ravinder Kumari Pratima Prashar Abhimanyu Sardana Ojus Singh Varinder 《Environmental science and pollution research international》2022,29(17):24951-24955
Environmental Science and Pollution Research - Study was conducted utilizing a confirmed medication adherence scale to measure the socio-demographic profile, self-care, and medication... 相似文献
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Satyaparameshwar K Ravinder Reddy T Vijaya Kumar N 《Journal of environmental biology / Academy of Environmental Biology, India》2006,27(1):39-41
Sublethal toxicity of copper sulphate on carbohydrate metabolism was studied in selected tissues of freshwater mussel, Lamellidens marginalis. Levels of glycogen and pyruvic acid decreased while lactic acid showed an increase. Activities of LDH, SDH and MDH decreased while G-6-PDH activity increased. There appears to be a shift in the carbohydrate metabolism from aerobic to anaerobic type due to toxicity of copper. 相似文献
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VishnuRadhan Renjith Thresyamma Divya David Eldho T. I Dhiman Ravinder Bhavan Sreekanth Giri 《Environmental science and pollution research international》2022,29(57):85619-85631
Environmental Science and Pollution Research - COVID-19 has wreaked havoc throughout the planet within a short time frame, inducing substantial morbidity and mortality in the global population. The... 相似文献