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491.
Kensuke Okada William R. Pitchers Manmohan D. Sharma John Hunt David J. Hosken 《Behavioral ecology and sociobiology》2011,65(9):1773-1778
Intraspecific variation in a resting metabolic rate (RMR) is likely to be an important determinant of energetic-resource use
and may influence the resources subsequently available for allocation to traits not directly associated with somatic maintenance.
The influence of RMR on resource availability could be especially important for condition-dependent sexual traits, such as
cricket calls, that are themselves energetically costly to produce. RMR may also be associated with longevity, either negatively
because individuals with a high RMR burn resources faster and die young, or positively as individuals with high RMR are more
able to accrue resources to fuel survival. Additionally, the associations between RMR and other characters may vary across
populations if differential selection or drift shapes these traits. Here we tested for differences in RMR, body mass, calling
effort, and longevity in two populations of cricket Gryllodes sigillatus and then evaluated the potential influence of RMR on calling and longevity. We find that RMR, calling effort, and longevity
varied across populations, but mass did not. Controlling for population and mass, RMR was not significantly associated with
calling effort, but was negatively associated with longevity. These findings suggest that male crickets that live fast die
young. 相似文献
492.
Effect of land use land cover change on soil erosion potential in an agricultural watershed 总被引:6,自引:0,他引:6
Arabinda Sharma Kamlesh N. Tiwari P. B. S. Bhadoria 《Environmental monitoring and assessment》2011,173(1-4):789-801
Universal soil loss equation (USLE) was used in conjunction with a geographic information system to determine the influence of land use and land cover change (LUCC) on soil erosion potential of a reservoir catchment during the period 1989 to 2004. Results showed that the mean soil erosion potential of the watershed was increased slightly from 12.11 t ha???1 year???1 in the year 1989 to 13.21 t ha???1 year???1 in the year 2004. Spatial analysis revealed that the disappearance of forest patches from relatively flat areas, increased in wasteland in steep slope, and intensification of cultivation practice in relatively more erosion-prone soil were the main factors contributing toward the increased soil erosion potential of the watershed during the study period. Results indicated that transition of other land use land cover (LUC) categories to cropland was the most detrimental to watershed in terms of soil loss while forest acted as the most effective barrier to soil loss. A p value of 0.5503 obtained for two-tailed paired t test between the mean erosion potential of microwatersheds in 1989 and 2004 also indicated towards a moderate change in soil erosion potential of the watershed over the studied period. This study revealed that the spatial location of LUC parcels with respect to terrain and associated soil properties should be an important consideration in soil erosion assessment process. 相似文献
493.
Sarkar Niloy Sharma Radhey Shyam Kaushik Mahima 《Environmental science and pollution research international》2021,28(11):13221-13228
Environmental Science and Pollution Research - Nanopriming is an emerging field of science which uses nanoparticles in solution to improve parameters of seed vigor. This leads to an initial... 相似文献
494.
Mehta Malvika Sharma Mahima Pathania Kamni Jena Pabitra Kumar Bhushan Indu 《Environmental science and pollution research international》2021,28(36):49434-49446
Environmental Science and Pollution Research - The industrial revolution has marked a strong impact on financial upgradation of several countries, and increase in the industrial establishment... 相似文献
495.
Verma Vikas Rana Kunj Bihari Sharma Shyam Sunder 《Environmental science and pollution research international》2021,28(4):3983-3993
Environmental Science and Pollution Research - Solar energy is one of the major sources of renewable energy which contributes for environmental protection and pollution reduction. Methods and... 相似文献
496.
Life cycle assessment (LCA) provides a concept, framework, and method to identify and evaluate the environmental burdens of products and processes. An ongoing concern of companies trying to implement LCA is the value of LCA in supporting actual decisions versus the resources and time needed to conduct a “full” LCA. In response to these concerns, there has been a lot of activity surrounding the “streamlining” of LCA to keep it more manageable yet provide useful and acceptably accurate results. This article explores the concept of streamlining, discusses where and how streamlining decisions can be made in an LCA, and presents issues related to conducting more streamlined LCAs. Due to the wide variety of purposes and scenarios in which LCAs are conducted, it is difficult to devise a one-size-fits-all method for streamlining. Instead, we have focused on presenting the streamlining options in the context of major decision points that are common to most LCAs. 相似文献
497.
The global agenda of sustainable development (SD) will get a major boost from the successful implementation of the Sustainable Development Goals (SDGs) in developing countries. This requires effective planning and understanding of the SDGs at the national level and developing sound SDG indicators that account for country priorities. Currently, there is no formal SDG indicator set in India, but the process for it is underway. This paper has attempted to propose a unique technique for identifying the most representative indicator set for SD measurement in India based on the SDGs. Considering the needs and preferences of the country, a three‐stage process is proposed to develop the priority indicator set. The application of the approach has been presented for SDG 7, which relates to energy. This is supported with a background on India's SD progress. The proposed technique is simple yet effective, and can be easily replicated by other developing countries. 相似文献
498.
This study was conducted in the summer season (May, 2007). The fluoride concentration along with other physico-chemical parameters
in ground water samples was determined in Marks Nagar of Unnao district, Uttar Pradesh (India), since it is the only source
of drinking water for the villagers. The fluoride concentration in the water varied from 0.8 to 13.9 mgl−1 with a mean of 4.02 mgl−1. The correlation analysis revealed that fluoride had a positive correlation with pH, CO3, HCO3, and sodium adsorption ratio (SAR), whereas a negative correlation with Ca and Mg was found. A soil profile was also dug
in the area to assess depth-wise fluoride content in the soil. The soil samples and underneath calcium carbonate (CaCO3) concretion were analyzed for fluoride content. The percent of soluble fluoride to total fluoride in the soil varied from
25.15 to 4.76% down the soil profile. The soluble fluoride was found to decrease with the increase in the clay content in
the soil. The total leachable fluoride in CaCO3 concretions was found to be 6.08%. It was inferred from this study that the soil and underneath layer of CaCO3 concretions may be the potential source of fluoride contamination in the shallow drinking water sources of the area. 相似文献
499.
Rajeev Jain Pooja Sharma Shalini Sikarwar 《Environmental science and pollution research international》2013,20(3):1493-1502
The presence of dyes in water is undesirable due to the toxicological impact of their entrance into the food chain. Owing to the recalcitrant nature of dyes to biological oxidation, a tertiary treatment like adsorption is required. In the present study, unsaturated polyester resin (UPR) has been used as a sorbent in the treatment of dye-contaminated water. Different concentrations of Tropaeoline 000 containing water were treated with UPR. The preliminary investigations were carried out by batch adsorption to examine the effects of pH, adsorbate concentration, adsorbent dosage, contact time, and temperature. A plausible mechanism for the ongoing adsorption process and thermodynamic parameters have also been obtained from Langmuir and Freundlich adsorption isotherm models. Thermodynamic parameter showed that the sorption process of Tropaeoline 000 onto activated carbon (AC) and UPR were feasible, spontaneous, and endothermic under studied conditions. The estimated values for (ΔG) are ?10.48?×?103 and ?6.098?×?103 kJ mol?1 over AC and UPR at 303 K (30 °C), indicating towards a spontaneous process. The adsorption process followed pseudo-first-order model. The mass transfer property of the sorption process was studied using Lagergren pseudo-first-order kinetic models. The values of % removal and k ad for dye systems were calculated at different temperatures (303–323 K). The mechanism of the adsorption process was determined from the intraparticle diffusion model. 相似文献
500.
Lodhi HS Khan MA Verma RS Sharma UD 《Journal of environmental biology / Academy of Environmental Biology, India》2006,27(3):585-588
Fresh water prawns, Macrobrachium lamarrei and Macrobrachium dayanum (Crustacea-Decapoda) were subjected to static bioassay tests to ascertain the LC50 values of copper sulphate. The 24, 48, 72 and 96 hr LC50 values of copper sulphate for M. lamarrei were 0.38, 0.361, 0.343 and 0.300 mg/l and for M. dayanum were 1.634, 0.988, 0.532 and 0.418 mg/l respectively. Behavioral responses and LC50 values indicate that M. lamarrei were more sensitive to copper sulphate than M. dayanum. 相似文献