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Dutta, B. K.
- Lagerstroemia reginae Roxb. - an Ideal Host Supporting Orchid Species of Barak Valley, Southern Assam
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Indian Forester, Vol 135, No 11 (2009), Pagination: 1515-1525Abstract
A study was carried out to investigate the ideal host plants for orchid diversity of Southern Assam. Five selected commonly available species of the valley were chosen in the study by Braun Blanquet cover abundance scale method. After analysis, Lagerstroemia reginae Roxb. has been observed to be the most suitable host plant of orchids followed by others, in three Reserve Forests where the study was carried out.Keywords
Lagerstroemia reginae, Orchid, Southern Assam, Braun-Blanquet Cover AbundanceScale
- Germination, Seedling Behaviour and Phytomass of Some Acacias in the Nursery Stage
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Indian Forester, Vol 99, No 6 (1973), Pagination: 352-358Abstract
no abstract- Alpine Timberline Research Gap in Himalaya: A Literature Review
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Affiliations
1 WWF-India, Western Arunachal Landscape Conservation Programme
1 WWF-India, Western Arunachal Landscape Conservation Programme
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Indian Forester, Vol 140, No 4 (2014), Pagination: 419-427Abstract
Alpine timberline, considered to be important ecotone supports rich and highly vulnerable biodiversity and represent one of the most distinct boundaries between forest to tree less alpine areas. It has attracted geographers and ecologist to do research for a long time on the phenomena it encompasses. In recent time, alpine treeline ecotones across most of the world's mountains are being studied because of their potential for monitoring the effects of climate warming on forest ecosystem. Besides, alpine pasture areas in and around timberline zone and commercially important medicinal plants along timberline have also been playing important role as a source of livelihood of mountain communities settled in nearby area. In recent time, with the change in socio-economic aspiration of local mountain communities, there has been a rapid increase in pressure on natural resources in and around timberline area. However, compared to studies of timberline area of European Alps, Andes of South America and mountains of North America, which has reached a very advance stage, very limited studies on timberline of Himalayan mountain range have been carried out. In the present paper, review of timberline research work carried out in the mountain ranges of Europe, North America and Himalaya have been carried out to highlightthe gap in alpine timberline research work in Himalaya.Keywords
Alpine, Timberline, Ecotone, Biodiversity, Livelihood, Climate Change- Alterations in the Erythrocyte Membrane and Ultrastructural Changes in the Liver and Kidney of Albino Mice Exposed to Fipronil
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Affiliations
1 Microbial & Agricultural Ecology and Biodiversity Conservation Laboratory, Department of Ecology and Environmental Science, Assam University, Silchar-788011, IN
2 Department of Chemistry, Assam University, Silchar-788011, IN
1 Microbial & Agricultural Ecology and Biodiversity Conservation Laboratory, Department of Ecology and Environmental Science, Assam University, Silchar-788011, IN
2 Department of Chemistry, Assam University, Silchar-788011, IN
Source
Nature Environment and Pollution Technology, Vol 16, No 1 (2017), Pagination: 273-278Abstract
Fipronil is a highly active, broad spectrum systemic pesticide belonging to the phenyl pyrazole group of chemicals. The aim of the present study was to observe the alterations in the surface morphology of erythrocyte membranes of Swiss albino mice exposed to fipronil with the help of scanning electron microscope (SEM) and also its effect on the liver and kidney with the help of transmission electron microscope (TEM). The animals were divided into control group which received distilled water via intraperitoneal injection, and a treated group which received 1/3<sup?rd of LD50 dose of fipronil intraperitoneally, every 24 hours for 30 days. Various types of alterations in the morphology of the red blood cells of the fipronil treated mice were observed. There was decrease in discocytes and increase in the number of echinocytes, spherocytes and ovalocytes. In case of liver, the degeneration of the nucleus, nucleolus, nuclear membrane and mitochondria were commonly observed in all the treatments compared to the control. The cytoplasm was also found to be vacuolated with the breakdown of the organelles. The kidney cells of the treated mice were also observed with different degrees of degeneration. The mitochondria were damaged with destructed cristae surrounded by basal membrane that is disorganized and the nucleus was shrunken with dense chromatin condensation. Presence of vacuoles in the cytoplasm was seen as well as thickening of the glomerular basement membrane was observed.Keywords
Albino Mice, Electron Microscopy, Erythrocyte Membrane, Fipronil.References
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- Adoption of Bamboo Cultivation Practices and its Relationship with the Socio-Economic Characteristics of Bamboo Growers of Arunachal Pradesh
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Authors
Affiliations
1 Krishi Vigyan Kendra (A.A.U.), Garumuria, Lakhimpur (Assam), IN
2 Department of Forestry, North Eastern Regional Institute of Science and Technology, Nirjuli (Arunachal Pradesh), IN
3 Department of Ecology and Environmental Sciences, Assam University, Silchar (Assam), IN
1 Krishi Vigyan Kendra (A.A.U.), Garumuria, Lakhimpur (Assam), IN
2 Department of Forestry, North Eastern Regional Institute of Science and Technology, Nirjuli (Arunachal Pradesh), IN
3 Department of Ecology and Environmental Sciences, Assam University, Silchar (Assam), IN
Source
International Journal of Forestry and Crop Improvement, Vol 7, No 2 (2016), Pagination: 150-156Abstract
The present study was conducted in Papum pare district of Arunachal Pradesh and selected 160 bamboo growers covering four circle based on elevation. The mean value of adoption score (41.54) is highest in Balijan followed by Kimin (40.26) and lowest in Sagalee circle (35.39). So, the farmers of Balijan circle are much more advanced in adopting the scientific bamboo cultivation practices as compared to other circles. A positive correlation is found in all socio-economic characteristics except age. The co-efficient of multiple determinations explain that all the six variables in overall sample, jointly contributes 53.65 per cent variation in overall adoption score.Keywords
Adoption, Scientific, Bamboo, Relationship.- Technical Session : 1
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Authors
Affiliations
1 B. E. College, Howrah, IN
1 B. E. College, Howrah, IN