Refine your search
Collections
Co-Authors
Journals
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
Das, Ashesh Kumar
- Gregarious Flowering in Woody Bamboos: does it Mean End of Life?
Abstract Views :269 |
PDF Views:102
Authors
Affiliations
1 Department of Ecology and Environmental Science, Assam University, Silchar 788 011, IN
1 Department of Ecology and Environmental Science, Assam University, Silchar 788 011, IN
Source
Current Science, Vol 106, No 1 (2014), Pagination: 12-13Abstract
No Abstract.Full Text
- Imperata Grasslands:Carbon Source or Sink?
Abstract Views :260 |
PDF Views:83
Authors
Affiliations
1 Department of Ecology and Environmental Science, Assam University, Silchar 788 011, IN
1 Department of Ecology and Environmental Science, Assam University, Silchar 788 011, IN
Source
Current Science, Vol 108, No 12 (2015), Pagination: 2250-2253Abstract
Imperata grasslands, among the oldest forms of managed village land use, provide rural people with subsistence and monitory benefits. Yet, little is known about their role in global carbon (C) budget under the scenario of changing climate. The present study was carried out in managed Imperata grassland in Cachar district, Assam, North East India. The study was designed to understand whether Imperata grasslands are C source or sink, because they are managed through annual fire practice. We studied (i) organic carbon accumulation rate in the soil, (ii) C input from aboveground biomass (CIAB), (iii) C input from belowground biomass (CIBB) and (iv) Soil CO2 efflux/soil respiration (Rs) on monthly intervals from October 2013 to September 2014 following standard methods. Later monthly data were merged into four distinct seasons, viz. autumn, winter, summer and rainy season to have a clear vision of seasonal influence on C source/sink status. The study showed highest (2.52 g C m-2 month-1) soil organic carbon accumulation during summer season. Highest values for CIAB (14.31 g C m-2 month-1), CIBB (30.98 g C m-2 month-1) and Rs (31.85 g C m-2 month-1) were observed during rainy, autumn and summer seasons respectively. C budget analysis with respect to seasons showed Imperata grasslands act as C source during winter and summer, whereas they serve as sink during autumn and rainy seasons. However, annual C budget (across all the months) showed Imperata grasslands as a net sink of 38.45 g C m-2 year-1 (0.40 Mg C ha-1 year-1). Further research is needed to develop better management systems to enhance sink capacity of Imperata grasslands.Keywords
Carbon Budget, Climate Change Mitigation, Imperata Grasslands, Soil Organic Carbon, Soil Respiration.Full Text
- Grains for Ecosystem Carbon Management in North East India
Abstract Views :271 |
PDF Views:75
Authors
Affiliations
1 Department of Ecology and Environmental Science, Assam University, Silchar 788 011, IN
2 Carbon Management and Sequestration Center, The Ohio State University, Columbus, OH 43210, US
1 Department of Ecology and Environmental Science, Assam University, Silchar 788 011, IN
2 Carbon Management and Sequestration Center, The Ohio State University, Columbus, OH 43210, US
Source
Current Science, Vol 109, No 8 (2015), Pagination: 1387-1389Abstract
No Abstract.Full Text
- Managing Rubber Plantations for Advancing Climate Change Mitigation Strategy
Abstract Views :192 |
PDF Views:76
Authors
Affiliations
1 Department of Ecology and Environmental Science, Assam University, Silchar 788 011, IN
1 Department of Ecology and Environmental Science, Assam University, Silchar 788 011, IN
Source
Current Science, Vol 110, No 10 (2016), Pagination: 2015-2019Abstract
Storing atmospheric carbon dioxide (CO2) in a long- term reservoir is one of the viable strategies to decelerate the climate change phenomenon. Terrestrial vegetation, especially forestry and agroforestry systems have been prioritized to stock CO2 through phototropic sequestration. Rubber tree (Hevea brasiliensis), primarily managed for latex production, is explored in this contribution for its role in vegetation carbon stock management and climate change mitigation. The present study was carried out in selected Hevea stands aged between 5 and 40 years from Barak Valley, part of North East India. A total of 67 trees were harvested to estimate the biomass carbon stock in above- and below-ground components in plantations of different age groups. The study revealed that plantation density of 688-784 trees ha-1 is managed under plantations of different age groups. Total biomass (above and below ground) increased from 41 kg tree-1 under 5-10 years to 307 kg tree-1under 30-40 years age group of plantations. Total vegetation carbon stock (Mg ha-1; above and below ground) ranged from 16.00 (5-10 years) to 105.73 (30-40 years), which is more than many tropical forestry and agroforestry systems across the world. Vegetation carbon sequestration rate revealed that 2.56 mg C ha-1 year-1 organic carbon is being accumulated in Hevea plantations. Considering the economic profitability from Hevea plantation management (through latex production) and its capability to stock high-biomass carbon, restoring degraded and secondary forests through this species will improve livelihood security and advance climate change mitigation strategies.Keywords
Agroforestry Systems, Carbon Sequestration, Climate Change Mitigation, Rubber Plantations.Full Text
- Why Should we Preserve Wetlands?
Abstract Views :292 |
PDF Views:85
Authors
Affiliations
1 Department of Ecology and Environmental Science, Assam University, Silchar 788 011, IN
1 Department of Ecology and Environmental Science, Assam University, Silchar 788 011, IN
Source
Current Science, Vol 110, No 9 (2016), Pagination: 1619-1620Abstract
Wetlands are transitional zones between terrestrial and aquatic systems, and remain inundated or saturated due to high groundwater or surface water during a part or all through the year. Wetlands in different parts of the world have been used for agriculture because of their natural fertility and water availability. Livelihood, food security, income and nutrition of the people living in and around the wetlands in Asia and Africa are strongly affected by their management. Wetlands are amongst the most environmentally sustainable systems, but produce low yield due to traditional systems of management.Full Text
- Role of Smallholder Tea Growers in Carbon Sink Management
Abstract Views :209 |
PDF Views:69
Authors
Affiliations
1 Department of Ecology and Environmental Science, Assam University, Silchar 788 011, IN
1 Department of Ecology and Environmental Science, Assam University, Silchar 788 011, IN
Source
Current Science, Vol 116, No 9 (2019), Pagination: 1560-1566Abstract
One-fourth of the total tea production in India comes from smallholder tea estates, thus signifying the importance of this land use in biomass carbon management. As small-scale tea plantation management provides livelihood security to the growers, they prefer to manage such plantation over a long period of time and therefore maintaining a permanent sink of carbon. In the present study from Barak Valley part of North East India, such smallholder plantations were assessed for carbon stock in tea bushes, shade trees and soil compartment. Allometric equation for tea plants developed from this region was used for estimation of biomass carbon stock in tea bushes, while species-specific volume equations were used for shade trees. Carbon stock of biomass, litter layer and soil compartment in smallholder tea plantations were estimated as 30.50 Mg, 5.54 Mg and 122.17 ± 9.82 Mg C ha–1 up to 1 m depth respectively. Shade tree compartment contributed a dominant proportion (56.37%) of biomass and carbon stock compared to tea bushes (25.46%) and litter layer (18.17%). Collectively soil compartment holds maximum proportion (80%) of carbon stock followed by shade tree (11%), tea bush (5%) and litter (4%) compartments in the system. Comparatively carbon stock in smallholder tea estate is lower than many of the tropical and subtropical forestry and agroforestry systems. Nonetheless, the former sustains the livelihood of million of farmers across the tropical world and simultaneously maintains a permanent sink of carbon. Further studies are required to better understand the tea agroforestry arrangement to promote sink capability of smallholder tea estates.Keywords
Biomass Carbon Stock, Climate Change Mitigation, Phytosociology, Smallholder Tea Growers.Full Text
References
- Le Quere, C. et al., Global carbon budget 2015. Earth Syst. Sci. Data, 2015, 7, 349–396.
- Dlugokencky, E. and Tans, P., Trends in atmospheric carbon dioxide. National Oceanic and Atmospheric Administration, Earth System Research Laboratory (NOAA/ESRL), USA; http://www.esrl.noaa.gov/gmd/ccgg/trends (last accessed on 26 July 2016).
- Houghton, R. A., Balancing the global carbon budget. Annu. Rev. Earth Planet. Sci., 2007, 35, 313–347.
- Kumar, B. M. and Nair, P. K. R. (eds), Carbon Sequestration Potential of Agroforestry Systems, Springer, The Netherlands, 2011.
- Tea Board of India, Tea statistics. Ministry of Commerce & Industry, Government of India, 2014; http://teaboard.gov.in (accessed on 17 January 2015).
- Das, T. and Das, A. K., Mapping and identification of homegardens as a component of the trees outside forests using remote sensing and geographic information system. J. Indian Soc. Remote Sensing, 2013, 42, 233–242.
- Committee on Commodity Problems, Contribution of smallholders to the tea sub-sector and policies required to enhance their livelihood. In Intergovernmental Group on Tea (CCP: TE 12/4, pp. 1–6). 20th Session, Colombo, Sri Lanka, 30 January–1 February 2012.
- Onduru, D. D., De Jager, A., Hiller, S. and Van den Bosch, R., Sustainability of smallholder tea production in developing countries: learning experiences from farmer field schools in Kenya. Int. J. Dev. Sustain., 2012, 1, 714–742.
- Dawson, I. K. et al., Trees, tree genetic resources and the livelihoods of rural communities in the tropics. In Thematic Study for the State of the World’s Forest Genetic Resources. Food and Agriculture Organization of the United Nations, Rome, Italy, 2013.
- Koul, D. N. and Panwar, P., Prioritizing land management options for carbon sequestration potential. Curr. Sci., 2008, 95, 658– 663.
- Wijeratne, T. L., De Costa, W. A. J. M. and Wijeratne, M. A., Carbon sequestration potential of tea plantations in Sri Lanka. In Conference paper 228th Experiment and Extension Forum, Colombo, Sri Lanka, 2014.
- Li, S. et al., Quantifying carbon storage for tea plantations in China. Agric. Ecosyst. Environ., 2011, 141, 390–398.
- Kamau, D. M., Spiertz, J. H. J. and Oenema, O., Carbon and nutrient stocks of tea plantations differing in age, genotype and plant population density. Plant Soil, 2008, 307, 29–39.
- Kalita, R. M., Carbon storage and sequestration in tea agroforestry system in Barak Valley, Assam. Ph D thesis, Assam University, Silchar, 2015.
- Singh, S. and Dadhwal, V. K., Vegetation Carbon Pool Assessment of India, Indian Institute of Remote Sensing, Dehradun, 2009.
- Mayer, H. D. G., A manual and tutorial for the proper use of an increment borer. Tree Ring Res., 2003, 59, 63–79.
- FRI, Indian Woods, Volume I–VI, Forest Research Institute, Dehradun, 1996.
- Zanne, A. E. et al., Global Wood Density Database, Dryad, 2009; http://hdl.handle.net/10255/dryad.235.
- FSI, Volume Equations for Forests of India, Nepal and Bhutan, Forest Survey of India, Dehradun, 1996.
- Devagiri, G. M. et al., Assessment of above ground biomass and carbon pool in different vegetation types of south western part of Karnataka, India using spectral modeling. Trop. Ecol., 2013, 54, 149–165.
- Ravindranath, N. H. and Ostwald, M., Carbon Inventory Methods Handbook for Greenhouse Gas Inventory, Carbon Mitigation and Roundwood Production Projects, Springer, The Netherlands, 2008.
- IPCC, Intergovernmental Panel on Climate Change 2007. Synthesis Report, 2007; http://www.ipcc.ch/pdf/assessment-report/ar4/syr/ar4_syr.pdf (accessed on 10 May 2011).
- Kalita, R. M., Das, A. K. and Nath, A. J., Allometric equations for estimating above and belowground biomass in tea (Camellia sinensis (L.) O. Kuntze) agroforestry system of Barak Valley, Assam, Northeast India. Biomass Bioenerg., 2015, 83, 42–49.
- Newbould, P. J., Methods for Estimating the Primary Production of Forests, IBP Handbook No. 2. Blackwell Scientific Publications, Oxford, 1967, p. 62.
- Velmurugan, A., Kumar, S., Kudrat, M. and Dadhwal, V. K., Spatial Assessment of Soil Carbon Pool of India, Indian Institute of Remote Sensing, Dehradun, 2009.
- Bouyoucos, G. H., Hydrometer method improved for making particle size analyses of soils. Agron. J., 1962, 54, 464-465.
- Brady, N. C. and Weil, R. R., The Nature and Properties of Soils, Pearson Education, New Jersey, 2008, 14th edn.
- Chan, K. Y., Bowman, A. and Oates, A., Oxidizable organic carbon fractions and soil quality changes in an oxicpaleustalf under different pasture leys. Soil Sci., 2001, 166, 61–67.
- Carbon Storage in Bamboo (Schizostachyum Dullooa) Forest of Barak Valley, Southern Assam, India
Abstract Views :275 |
PDF Views:74
Authors
Affiliations
1 Department of Ecology and Environmental Science, Assam University, Silchar 788 011, IN
1 Department of Ecology and Environmental Science, Assam University, Silchar 788 011, IN
Source
Current Science, Vol 116, No 10 (2019), Pagination: 1631-1366Abstract
The earth’s mean atmospheric carbon dioxide (CO2) concentration in 2018 was recorded at 410 ppm (parts per million), which is the highest in the past 800,000 years1. CO2 is one of the important longlived greenhouse gases (GHGs) that absorbs wavelengths of thermal energy and adds to the greenhouse effect in a unique way1. In January 2018, temperature across the earth’s land and ocean surfaces was 0.71°C above the 20th century average of 12.0°C (ref. 2). In this regard, enhancing sinks for ever-increasing CO2 concentration through promoting biotic reservoirs has been appreciated by the global scientific community as a strategy for climate change mitigation3. Further, identifying high carbon storage terrestrial ecosystems can advance our understanding on better management of CO2 as organic carbon in vegetation and soil. The specific aim of the present study is to explore the organic carbon storage of Schizostachyum dullooa forest in Barak Valley part of North East India.Full Text
References
- https://www.climate.gov/news-features/understanding-climate/climate-change-atmospheric-carbon-dioxide
- https://www.co2.earth/
- Nath, A. J., Lal, R. and Das, A. K., Global Ecol. Conserv., 2015, 3, 654– 663.
- Wang, B., Wei, W. J., You, W. Z., Niu, X. and Man, R. Z., J. Trop. For. Sci., 2013, 25, 127–148.
- Zhang, H., Zhuang, S., Sun, Bo, Ji, H., Li, C. and Zhou, S., Forestry, 2014, 87, 674–668.
- Zhou, G. M., Meng, C. F., Jiang, P. K. and Xu, Q., Bot. Rev., 2011, 77, 262– 270.
- Banik, R. L., Silviculture and FieldGuide to Priority Bamboos of Bangladesh and South Asia, Bangladesh Forest Research Institute, Chittagong, Bangladesh, 2000.
- Williams, J. T. and Rao, V. S. (eds), International Network for Bamboo and Rattan (INBAR) Technical Report, No. 1. INBAR and International Board for Plant Genetic Resources (IBPGR), New Delhi, 1994.
- Rao, A. N., Rao, V. R. and Williams, J. T., Priority species of bamboo and rattan, The International Plant Genetic Resources Institute – In Asia, The Pacific and Oceania (IPGRI-APO), Sardang, 1998.
- Hore, D. K., J. Econ. Taxon. Bot., 1998, 22, 173–181.
- Singnar, P., Das, M. C., Sileshi, G. W., Brahma, B., Nath, A. J. and Das, A. K., For. Ecol. Manage., 2017, 395, 81–91.
- Nath, A. J., Das, G. and Das, A. K., Biomass Bioenerg., 2009, 33, 1188– 1196.
- Yen, T. M. and Lee, J. S., For. Ecol. Manage., 2011, 261, 995–1002.
- Yen, T. M., Ji, Y. J. and Lee, J. S., For. Ecol. Manage., 2010, 260, 339–344.
- Christanty, L., Mailly, D. and Kimmins, J. P., For. Ecol. Manage., 1996, 87, 75– 88.
- Isagi, Y., Kawahara, T., Kamo, K. and Ito, H., Plant Ecol., 1997, 130, 41– 52.
- Edenhofer, O. et al., In Climate Change 2014: Mitigation of Climate Change. Contribution of Working Group III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, Cambridge University Press, Cambridge, UK, 2014.
- Singh, A. N. and Singh, J. S., For. Ecol. Manage., 1999, 119, 195–207.
- Uchimura, E., Bull. For. Prod. Res. Inst., 1978, 301, 79–118.
- Suzuki, T., Rep. Trop. Agric. Res. Cent., 1989, 65, 94–97.
- Isagi, Y., Kawahara, T. and Kamo, K., Ecol. Res., 1993, 8, 123–133.
- Singh, K. A. and Kochhar, S. K., J. Bamboo Rattan, 2005, 4, 323–334.
- Shanmughavel, P. and Francis, K., Biomass Bioenerg., 1996, 10, 383–391.
- Kumar, B. M., Rajesh, G. and Sudheesh, K. G., J. Trop. Agric., 2005. 43, 51– 56.
- Embaye, K., Weih, M., Ledin, S. and Christersson, L., For. Ecol. Manage., 2005, 204, 159–169.
- Castañeda-Mendoza, A., Vargas-Hernández, J. J., Gómez-Guerrero, A., ValdezHernández, J. I. and Vaquera-Huerta, H., Agrociencia, 2005, 39, 107–116.
- Quiroga, R., Ricardo, A., Tracey, Li., Gonzalo, L. and Andersen, L. E., Development Research Working Paper Series No. 04/2013, 2013.
- Thockhom, A. and Yadava, P. S., Trop. Ecol., 2017, 58, 23–32.
- Are Traditional Bamboo Products Green?
Abstract Views :240 |
PDF Views:86
Authors
Affiliations
1 Department of Ecology and Environmental Science, Assam University, Silchar 788 011, IN
1 Department of Ecology and Environmental Science, Assam University, Silchar 788 011, IN
Source
Current Science, Vol 118, No 9 (2020), Pagination: 1339-1342Abstract
Bamboo is an important wood substitute and agroforestry plant1 occupying about 37 million hectares of total forest area of the world2 . There are about 1250–1500 species of bamboo worldwide3 . It is estimated that almost 11.4 million hectares of land in India is under bamboos and India is a major bamboo-producing country in Asia4 . It is one of the most environmentally and economically sustainable resources5 and has a major contribution to the diverse economic needs of the rural community of the country5 . North-east India occupies about 28% of the total bamboo area of the country and sustains about 70% of rural work force in the region6 . Therefore, bamboo forms an important component of rural economy of north-east India5 . There are many potential uses of bamboo including food, medicine, fencing, roofing, construction material, furniture, shelter, traditional crafts which plays a significant role as an income generator for the rural poor5 . It has been observed that bamboo has a high potential to sequester large amount of carbon and has a crucial role in the climate change mitigation by carbon balance in the ecosystem1,3–5 . The high standing carbon stock of bamboo thus makes it a vital sink of the terrestrial ecosystem 7 .Full Text
References
- Nath, A. J. and Das, A. K., Trop. Ecol., 2012, 53, 287–293.
- Daba, M., J. Sci. Res. Rep., 2016, 12, 1–8.
- Yuen, J. Q., Fung, T. and Ziegler, A. D., Fore. Ecol. Manage., 2017, 393, 113–138.
- FAO, Global Forest Resources Assessment, FAO Forestry Paper 163, 2010.
- Nath, A. J., Sileshi, G. W. and Das, A. K., Land Use Policy, 2018, 75, 191–200.
- NEDFCL, North Eastern Data Bank 2016, NEDFi House, G. S. Road, Assam, India; http://databank.nedfi.com/content/assam
- Nath, A. J., Lal, R. and Das, A. K., Global Ecol. Conserv., 2015, 3, 654–663.
- Banik, R. L., Silviculture and Field-Guide to Priority Bamboos of Bangladesh and South Asia, Bangladesh Forest Research Institute, Chittagong, 2000.