MANASH J NATH - Academia.edu (original) (raw)

Papers by MANASH J NATH

Acta Ecologica Sinica

The present study sought to identify the potential distribution range of critically endangered Gy... more The present study sought to identify the potential distribution range of critically endangered Gymnocladus assamicus in Arunachal Pradesh based on published data and field collection. We used the Maxent model to estimate the range of distribution and the result was then compared with three other models, i.e., the Generalized Linear Model (GLM), the Bioclim and the Random Forest model to assess the species&amp;amp;amp;amp;#39; habitat suitability. A total of 23 different environmental variables were used, including bioclimatic ones, monthly minimum and maximum temperature, monthly precipitation and elevation data. The Maxent output listed 12 variables explaining 99.9% variation in the model. In comparison, Maxent showed the maximum region under habitat suitability criteria (1884.48 km 2), followed by Random Forest (70.73 km 2) and Bioclim (11.62 km 2) model. Except for the Maxent model, suitable habitats predicted by other models are highly restricted within and across the study species&amp;amp;amp;amp;#39; current distribution range. The average model prediction shows an expanded distribution range for the species up to Tawang which is the closest district of currently known distribution of the species in the state. Thus, the present study recognizes the importance of the geographic range of G. assamicus, a critically endangered species with very limited spatial distribution range and also provides some specific details to explore possible habitats for the species in new areas of potential occurrence in Arunachal Pradesh, India.

Environmental Monitoring and Assessment, 2010

Distribution of arsenic (As) and its compound and related toxicology are serious concerns nowaday... more Distribution of arsenic (As) and its compound and related toxicology are serious concerns nowadays. Millions of individuals worldwide are suffering from arsenic toxic effect due to drinking of As-contaminated groundwater. The Bengal delta plain, which is formed by the Ganga-Padma-Meghna-Brahmaputra river basin, covering several districts of West Bengal, India, and Bangladesh is considered as the worst As-affected alluvial basin. The present study was carried out to examine As contamination in the state of Assam, an adjoining region of the West Bengal and

International Journal of Mosquito Research, 2021

The risk of mosquito-borne diseases has put world under threat for long years. Many dependant var... more The risk of mosquito-borne diseases has put world under threat for long years. Many dependant variables, particularly physical and biological parameters of the breeding site directly influence the species richness and abundance patterns of mosquito species. The present study is an attempt to map the mosquito vector distribution in Sonitpur district of Assam, an endemic district in terms of mosquito borne diseases. Mosquito vectors are collected using CDC light traps from 21 different habitats along with their geographic coordinates. Geospatial technologies have been used for better interpretation of the mosquito distribution pattern. This study reveals that, the Anopheles and Culex mosquitoes are the dominant species. Malaria vectors are dominant in the northern part of the district due to the high extents of forest patches. Culex species is mainly distributed in the wetlands associated area and Mansonia species does not show affinity towards a particular habitat. Result of the stud...

Solid waste management has become a very complex and challenging task for the local self governme... more Solid waste management has become a very complex and challenging task for the local self governments due to financial and organizational constraints. Therefore, in countries like India much of these wastes, especially hazardous, bio-medical and non degradable waste, are inadequately managed and very often, causing serious environmental and health related problems. The main focus of the research work therefore, is to review the existing solid waste management scheme and to design a more effective and integrated solid waste management mechanism through the active participation of the community for the study area and to work in similar condition.

International Journal of Innovative Research and Development, Mar 30, 2015

Tezpur is located on the northern landscape of the north eastern states of Assam, India. Tezpur i... more Tezpur is located on the northern landscape of the north eastern states of Assam, India. Tezpur is a tourist paradise but in last two decade higher rate of population growth, increasing rate of rural to urban migration accelerate the process of urbanization and generation of quantum of solid wastes. Generation of large quantum of wastes and inefficient management system is not only changing the urban scenario of this beautiful town but also responsible for degradation of environment and threat to public health. The present research aims to study the existing waste management system in Tezpur municipal area to face the future challenges.

International Journal of Innovative Research and Development, Feb 28, 2015

The state of solid waste management in most of the urban areas of developing countries is now a m... more The state of solid waste management in most of the urban areas of developing countries is now a major social and environmental challenge with the explosion of Population and the pace urbanization. In India in particular, the combined influence of poverty, population growth and rapid urbanization has tended to worsen the situation. In response to the waste challenge many developed countries have embarked upon ambitious environmental reforms, recording remarkable advances in best practices and sustainable management of MSW. However, like many developing countries, India has faced many problems to manage the MSW in a sustainable manner. The study aims to carry out an analysis on the waste management practices and to develop a integrated waste management model for Tezpur municipal area and for the similar environment.

Journal of parasitic diseases : official organ of the Indian Society for Parasitology, 2012

In the present investigation, the epidemiology of malaria among seven tea estates of Nagaon and U... more In the present investigation, the epidemiology of malaria among seven tea estates of Nagaon and Udalguri districts of Assam, India has been described. A cross-sectional open study was carried out to understand the malaria epidemiology and associated risk factors among the tea tribes during March to September 2009. Out of 1,182 peripheral blood smears examined, 506 found positive for malaria (slide positivity rate, SPR = 42.8) with Plasmodium falciparum as predominant species. Dimakuchi tea estate was having highest SPR (P = 0.0275) and contributed more number of P. falciparum cases (P < 0.00001). Tea estates studied in both Udalguri and Nagaon districts were equally affected and the SPR recorded were 41.75 and 43.32% respectively. 154 malaria cases detected were having 'O' blood group but each blood group was found to have similar susceptibility of acquiring malaria infection (χ(2 ) = 3.603; P = 0.3076) and P. falciparum infection (χ(2 ) = 1.818; P = 0.6110). The SPR was ...

Geocarto International, 2012

The Brahmaputra River, one of the largest rivers in the world, acts as a backbone for the agro-va... more The Brahmaputra River, one of the largest rivers in the world, acts as a backbone for the agro-valley region of Assam. But the chronological shifting of the river, frequent flooding and severe erosion, have adverse effect on riverbank stability. Bank erosion of river Brahmaputra has reached an alarming proportion in many parts of Assam including Morigaon district. The objectives of the study are to examine the status of the bank line and the shifting of the bank line of the Brahmaputra River in the Morigaon district (1996-2021). The status of the bank line and its shifting were carried out from three sets of satellite imageries from Landsat-TM and Landsat-OLI for the year 1996, 2016, and 2021. From Mayong Revenue circle in the west to Laharighat in the east, the river along the bank line has been divided into 43 strips at an equal spacing of approximately 1 km and reference cross-sections have been drawn at the boundary of each strip. The result shows that at least 94 villages got e...

International Journal of Geographical Information Science, 2012

Malaria is a major health problem in India especially in the north-east region. Various methods t... more Malaria is a major health problem in India especially in the north-east region. Various methods to combat malaria have been adopted in this region but this problem is yet not under control as all the states report perennial morbidity and mortality due to malaria. The control programmes jeopardized due to improper implementation, inadequate surveillance and lack of geo-referenced information to pinpoint the trouble spots for timely preventive actions. In this investigation an information management system has been constructed based on geographical information system (GIS) for Udalguri district using sub-centre wise malaria data for quick retrieval of information and generation of maps which highlight malaria hot spots. Out of a total of 144 sub-centres, GIS identified 11 sub-centres as malaria hot spots based on annual parasitic incidence >5 and Plasmodium falciparum >30% consistently for 3 years (2006–2008). The district health authorities were advised to focus malaria control...

Public health, 2013

To identify the malaria hot spots at health subcentre level in an endemic district using a geogra... more To identify the malaria hot spots at health subcentre level in an endemic district using a geographical information system (GIS). The results will be useful for rapid retrieval of malaria information, and to prioritize malaria control efforts in identified hot spots. Extraction, analysis and synthesis of relevant data. Malaria epidemiological data from 2006 to 2009 were analysed to determine the annual parasitic index, slide positivity rate, annual blood examination rate and Plasmodium falciparum percentage for each health subcentre in the district. Maps were produced using GIS, and integrated to identify the malaria hotspots. Out of 288 health subcentres, GIS identified 10 hot spots at extremely high risk of malaria and 14 hot spots at high risk of malaria. Malaria may flare up in these hot spots whenever favourable transmission conditions arise. Health authorities have been advised to establish control measures in these selected hot spots for timely prevention. There is a need for...

ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016

Malaria is endemic and a major public health problem in north east (NE) region of India and contr... more Malaria is endemic and a major public health problem in north east (NE) region of India and contributes about 8-12% of India's malaria positives cases. Historical morbidity pattern of malaria in terms of API (Annual Parasite Incidence) in the state of Assam has been used for delineating the malaria incidence hotspots at health sub centre (HSC) level. Strong spatial autocorrelation (p<0.01) among the HSCs have been observed in terms of API (Annual Parasite Incidence). Malaria incidence hot spots in the state could be identified based on General G statistics and tested for statistical significance. Spatial correlation of malaria incidence hotspots with physiographic and climatic parameters across 6 agro-climatic zones of the state reveals the types of land cover pattern and the range of elevation contributing to the malaria outbreaks. Analysis shows that villages under malaria hotspots are having more agricultural land, evergreen/semi-evergreen forests with abundant waterbodies. Statistical and spatial analyses of malaria incidence showed a significant positive correlation with malaria incidence hotspots and the elevation (p<0.05) with villages under malaria hotspots are having average elevation ranging between 17 to 240 MSL. This conforms to the characteristics of two dominant mosquito species in the state Anopheles minimus and An. baimai that prefers the habitat of slow flowing streams in the foot hills and in forest ecosystems respectively.