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
Tripathi, S. K.
- An Ecological Assessment of Spatial Pattern in Site Conditions in Bamboo Plantations in a Dry Tropical Region with a Comment on Clump Spacing
Authors
Source
Indian Forester, Vol 119, No 3 (1993), Pagination: 238-246Abstract
The role of bamboo (Dendrocalamus strictus) in causing spatial patterns in ecosystem structure and function has been studied in East Mirzapur Forest Division. The Bamboo savanna is characterized by spatial heterogeneity in form of concentric zones around the bamboo clumps showing greater productivity and soil fertility. The bamboo influence zone (about 1.25 m around the clump), having considerable input of bamboo litter and fine ischolar_mains, is characterized by greater accumulation of organic carbon and nutrients relative to the intervening herb covered zone. Compared to the herb zone, the increase in 0-30 cm soil content in the bamboo zone ranged: organic carbon 15-17 per cent, total nitrogen 7-11 per cent, available phosphorus 25-29 per cent, exchangeable potassium 20- 35 per cent. Because only <20% of the land area is strongly modified by bamboo with respect to soil fertility, it is suggested that a reduction in clump spacing may enhance the productivity of bamboo through its greater regulation of the nutrient relations as well as higher clump densities in the bamboo savanna ecosystem. The presently used clump density, therefore, needs a reappraisal.- Trend and Change Point Detection of Precipitation in Urbanizing Districts of Uttarakhand in India
Authors
1 Department of Water Resources Development and Management, Indian Institute of Technology Roorkee, Roorkee-247667, Uttarakhand, IN
Source
Indian Journal of Science and Technology, Vol 7, No 10 (2014), Pagination: 1573-1582Abstract
Precipitation is the one of the prime indicators of climate change and its aberration causes many extreme events such as floods and droughts. Long-term trends were analyzed as monthly, seasonal and annual rainfall of Haridwar, Dehradun,Udham Singh Nagar, Almora and Nainital using Mann-Kendall and linear regression tests and change point was detected using cumulative deviation and Worsley likelihood statistic. Mann Kendall test revealed that there is significant increase in rainfall only for Haridwar district which has more urbanizing area compared to other districts. Haridwar is the holy place attracting significant floating population from all over the world, especially during festivals and fairs. Anthropogenic activity and industrialization is also the major cause of rainfall trend fluctuation in the Haridwar city. The monthly trend tests show that July rainfall is increasing whereas the December rainfall is decreasing which could be due to the seasonal shift. The start of change in the rainfall trend for the above mentioned districts is observed with distinct difference from 2009 onwards. From this it can be concluded that the stations to the west show significant trends compared to station which is towards east. Monsoon especially in July month a trend of increasing rainfall is observed in the studied Indian cities. The spatial and temporal trends of precipitation are pertinent for the future development and sustainable management of water resources of a given region.Keywords
Change Point, Mann Kendall Trend, Rainfall, Uttarakhand, Worsely Likelihood Test- Measuring Ecosystem Patterns and Processes through Fractals
Authors
1 Department of Computer Science, Banaras Hindu University, Varanasi 221 005, IN
2 Department of Botany, Banaras Hindu University, Varanasi 221 005, IN
3 Forestry and Ecology Department, Indian Institute of Remote Sensing, Dehradun 248 001, IN
Source
Current Science, Vol 109, No 8 (2015), Pagination: 1418-1426Abstract
Changes in ecosystems are highly complex, heterogeneous and are extremely difficult to measure through single scale. Fractal geometry has been used to quantitatively estimate the extent of irregularity in ecosystem changes. However, in some cases it has been overly used giving misleading results. To avoid this, other metrics are also being used in studying changes in forest ecosystems. In this article, we review use of fractal geometry in measuring ecosystem components in a range of ecological conditions. Further, case studies from forest fragmentation and soil aggregates stability in different Indian tropical ecosystems with respect to management practices and environmental change have been described using fractal dimension. We have tried to point out some instances where fractals can more appropriately be used in assessing ecosystems properties and where it could not be successfully used. Characterization of ecological situations where fractals can effectively be used in general remains an important issue.Keywords
Ecosystem Complexity, Ecosystem Patterns, Fractal Dimension, Landscape Change, Soil Processes.References
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- Weaning in the Perspective of Breast Feeding in Rural Area
Authors
1 R.D. Birla SmarakKosh, Bombay Hospital, Mumbai, IN
Source
The Indian Journal of Nutrition and Dietetics, Vol 39, No 5 (2002), Pagination: 223-231Abstract
Nutritional problems among children are common in India and one of the reasons is poor feeding practices among the young children. The best way of ensuring child survival is to initiate steps to improve nutritional status of children. Nutrition and hearth of child is the product of dietary intake and morbidities suffered by the child. Several studies have demonstrated that during major diseases viz., diarrhoea and acute respiratory infection, feeding practices are jeopardized.- A Quantitative Morphometric Analysis of Barhar River Watershed of Mahoba district, U.P., India using Remote Sensing and GIS
Authors
1 Department of Geology, CAS, Institute of Science, Banaras Hindu University, Varanasi – 221005,Uttar Pradesh, IN
2 Department of Energy and Environment, M.G.C.G.V., Chitrakoot, Satna - 485334, Madhya Pradesh, IN
Source
Indian Journal of Science and Technology, Vol 10, No 11 (2017), Pagination:Abstract
Objectives: The quantitative morphometric analysis is found to be vital study in understanding hydrological aspects and its interaction with the environment of any watershed system. The main objective of the study is to calculate the morphometric parameters of the Barhar river watershed. Methods/Statistical Analysis: The study area lies between 79° 32′ E to 79° 37′ E longitude and 25° 22′ N to 25° 30′ 30′′ N latitude covering an area of about 48.75 km2 belonging to Bundelkhand region. The drainage of the region has been prepared using Survey of India (SOI) toposheet (No.54O/11), Landsat TM and Digital Elevation Model (DEM) of the area. Remote Sensing (RS), Geographical Information System (GIS) and Global Positioning System (GPS) have been used in the study as efficient tools in our various modern geographical and geological studies. Findings: Barhar river watershed belonging to the northern part of Mahoba district is a hard rock terrain consisting mostly granite and granitoids. Rivers flowing in such terrains are mostly found to follow the fractures and lineaments. The watershed is of forth order drainage having drainage density and stream frequency of 2.281 and 2.481 respectively. The watershed shows elongated in nature. The method applied to the river basin gave a recent calculation of the morphometric parameters of the region. Application/Improvements: The drainage morphometric analysis is important in selection of water recharge sites, watershed modelling and groundwater prospect mapping. The study would provide an important information collection regarding future watershed prospects of the area.Keywords
Barhar, GIS, Groundwater, Landsat TM, Morphometry, Remote Sensing- Coralline Algae from the Aramda Reef Member of the Chaya Formation, Mithapur, Gujarat
Authors
1 Department of Botany, University of Lucknow, Lucknow - 226 007, IN
2 Department of Geology, University of Rajasthan, Jaipur - 302 055, IN
3 Department of Geology, University of Lucknow, Lucknow - 226 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 80, No 2 (2012), Pagination: 215-230Abstract
The Quaternary sediments of the Aramda Reef Member of the Chaya Formation exposed in the Mojap coast near Mithapur, Gujarat are characterized by well-developed coralline algal build-ups. These algal build-ups are exceptionally rich in coralline algae and corals. In the present paper, thirteen species belonging to eight genera of coralline algae are described. Out of these, seven species (Titanoderma nataliae, Lithophyllum nitorum, Lithophyllum quadratum, Spongites sp. Brandano et al., 2005, Sporolithon lvovicum, Mesophyllum fructiferum and Lithothamnion praefruticulosum) are the new records for India. Four species (Titanoderma pustulatum, Sporolithon intermedium, Mesophyllum commune and Phymatolithon sp.) are first time recorded from the study area. Among the major framework builders of coralline algae of the Aramda Reef Member are Lithophyllum, Titanoderma, Sporolithon, Mesophyllum and Lithothamnion.
Two associations of the coralline algal assemblages can be distinguished: one indicating shallow water, high-energy conditions is developed in the upper part, while the other suggesting deposition in low-energy conditions is characteristic of the lower part of the succession. These algal associations, together with their growth-forms (encrusting, warty to fruticose, layered) come from stratigraphically separate beds. They indicate that the temperature, depth and hydrodynamic energy conditions also fluctuated during deposition of the Aramda Reef Member. It is concluded that the lower Hapalidiaceae-Sporolithaceae association dominated during warmer interval, whereas the upper lithophylloids association flourished in relatively low-temperature conditions. The associated corals indicate that minimum winter sea surface temperature remained above 18°-20° C.
Keywords
Coralline Algae, Aramda Reef Member, Chaya Formation, Mojap, Gujarat.References
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