ID: 57507
Title: Analysis of position time series of GPS-DORIS co-located stations
Author: Sofinae Khelifa, Salem Kahlouche, Mohamed Faouzi Belbachir
Editor: F D van der Meer
Year: 2012
Publisher: Elsevier, Vol 20, February 2013
Source: Centre for Ecological Sciences
Reference: None
Subject: International Journal of Applied Earth Observation and Geoinformation
Keywords: GPS, DORIS, Station coordinates, Time series analysis, Discrete wavelet transform, Allan variance
Abstract: We analyse the weekly time series of position residuals of 10 GPS-DORIS (Global Positioning System-Doppler Orbitography and Radiopositioning Intergrated by Satellite) co-located stations in order to evaluate the spectral content of the observed nonlinear station motion. We have used the discrete wavelet transform to extract trends and seasonal signals, and the Allan variance to characterise the residual noise which allows to evaluate the positioning stability of stations.
The GPS-DORIS co-located time series were produced using the GIPSY/OASIS II software, referred to ITRF2005 and expressed in the local geodetic reference frame. The wavelet analysi has revealed useful nonlinear trends, annual and semi-annual signals contained in the studied time series. For GPS time series, the amplitude of the annual signal is around 1.5 adn 2.9 mm in the horizontal (North and East) and Vertical components respectively, and the semi-annual signal shows amplitude around 0.8, 1.3 and 2.3 mm in the North, East and Vertical components, respectively. For DORIS time series, the annual and semi-annual signals show amplitudes of around 4-6 mm in the three components.
However, after having removed the trends, annual and semi-annual signals, the slope of the Allan variance graph shows for GPS position time series, a combination of a low flicker noise and dominant white noise in the all three components, while for DORIS time series, the white noise is more frequent in the three components. The noise level, defiend by the Allan deviation for the one-year sampling time, is smaller than 3 and 5 mm in the three components for GPS and DORIS time series, respectively.
Location: TE 12, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57506
Title: Mapping post-fire forest regeneration and vegetation recovery using a combination of very high spatial resolution and hyperspectral satellite imagery
Author: George H Mitri, Ioannis Z Gitas
Editor: F D van der Meer
Year: 2012
Publisher: Elsevier, Vol 20, February 2013
Source: Centre for Ecological Sciences
Reference: None
Subject: International Journal of Applied Earth Observation and Geoinformation
Keywords: Forest regeneration, vegetation recovery, very high spatial resolution imagery, hyperspectral imagery, object-based classification
Abstract: Careful evaluation of forest regeneration and vegetation recovery after a fire event provides vital information useful in land management. The use of remotely sensed data is considered to be especially suitable for monitoring ecosystem dynamics after fire. The aim of this work was to map post-fire forest regenerating and vegetation recovery on the Mediterranean island of Thasos by using a combination of very high spatial (VHS) resolution (QuickBird) and hyperspectral (EO-1 Hyperion) imagery and by employing object -based image analysis. More specifically, the work focused on (1) the separation and mapping of three major post-fire classes (forest regeneration, other vegetation recovery, unburned vegetation) existing within the fire perimeter, and (2) the differentiation and mapping of the two main forest regeneration classes, namely, Pinus brutia regeneration, and Pinus nigra regeneration. The data used in this study consisted of satellite images and field observations of homogeneous regenerated and revegetated areas. The methodology followed two main steps: a three-level image segmentation, and, a classification of the segmented images. The process resulted in the separation of classes related to the aforementioned objectives. The overall accuracy assessment revealed very promising results (approximately 83.7% overall accuracy, with a Kappa Index of Agreement of 0.79). The achieved accuracy was 8% higher when compared to the results reported in a previous work in which only the EO-1 Hyperion image was employed in order to map the same classes. Some classification confustions involving the classes of P. brutia regeneration and P. nigra regeneration were observed. This could be attributed to the absence of large and dense homogeneous areas of regenerated pine trees in the study area.
Location: TE 12, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57505
Title: Towards a pan-European burnt scar mapping methodology based on single date medium resolution optical remote sensing data
Author: Fernando Sedano, Pieter Kempeneers, Jesus San Miguel, Peter Strobl, Peter Vogt
Editor: F D van der Meer
Year: 2012
Publisher: Elsevier, Vol 20, February 2013
Source: Centre for Ecological Sciences
Reference: None
Subject: International Journal of Applied Earth Observation and Geoinformation
Keywords: Forest fires, burnt scar mapping, remote sensing, medium resolution, large areas
Abstract: A two stage approach for burnt scar detection from single date multispectral medium spatial resolution optical remote sensing data (AWIFS) has been developed. The approach includes first an identification of burnt scar seeds based on a learning algorithm followed by a region growing process. An Artificial Neural Network (ANN) and a Classification tree (CT) were tested as learning algorithms. Both learning algorithms were coupled with a bootstrap aggregation. Training data for the classifiers were obtained from MODIS-based polygons generated by the Rapid Damage Assessment (RDA) module of the European Forest Fire Information System (EFFIS), to which different levels of filtering were applied. The outcomes were validated against datasets generated from visual interpretation of ETM+ scenes. The method was tested in two locations of Portugal and Greece. Both ANN and CT alternatives produced similar resutls, with kappa coefficients close to 0.80 in the Greek location and higher than 0.70 in the Portuguese location. In test sites, more than 80% and 90% of burnt areas larger than 10 ha and 50 ha respectively were detected. The results show that filtering the training dataset reduces the overestimation of burnt areas and produce higher accuracies.
Location: TE 12, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57504
Title: Multiscale mapping of burn area and severity using multisensor satellite data and spatila autocorrelation analysis
Author: A Lanorte, M Danese, R Lasaponara, B Murgante
Editor: F D van der Meer
Year: 2012
Publisher: Elsevier, Vol 20, February 2013
Source: Centre for Ecological Sciences
Reference: None
Subject: International Journal of Applied Earth Observation and Geoinformation
Keywords: ASTER, MODIS, Fire severity, Spatial autocorrelation statistics
Abstract: Traditional methods of recording fire burned areas and fire severity involve expensive and time-consuming field surveys. Available remote sensing technologies may allow us to develop standarized burn-severity maps for evaluating fire effects and addressing post fire management activities. This paper focuses on multiscale characterization of fire severity using multisensor satellite data. To this aim, both MODIS (Moderate Resolution Imaging Spectoradiometer) and ASTER (Advanced Spacborne Thermal Emission and Reflection Radiometer) data have been processed using geo-statistic analyses to capture pattern features of burned areas.
Even if in last decades different authors tried to integrate geo-statistics and remote sensing imag processing, methods used since now are only variograms, semivariograms and kriging. In this paper, we porpose an approach based on the use of spatial indicators of global and local autocorrelation. Spatial auto-correlation statistics, such as Moran ' s I and Getis - Ord Local Gi index, were used to measure and analyze dependency degree among spectral features of burned area. This approach enables the characterization of pattern features of a burned area and improves the estimation of fire severity.
Location: TE 12, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57503
Title: Assessment of the abnormal growth of floating macrophytes in Winam Gulf (Kenya) by using MODIS imagery time series
Author: L Fusilli, M O Collins, G Laneve, A Palombo, S Pignatti, F Santini
Editor: F D van der Meer
Year: 2012
Publisher: Elsevier, Vol 20, February 2013
Source: Centre for Ecological Sciences
Reference: None
Subject: International Journal of Applied Earth Observation and Geoinformation
Keywords: MODIS, Time series, Water hyacinth, Lake Victoria, Water quality, Aquatic weed
Abstract: The objective of this research study is to assess the capability of time-series of MODIS imagery to provide information suitable for enhancing the understanding of the temporal cycles shown by the abnormal growth of the floating macrophytes in order to support monitoring and management action of Lake Victoria water resources.
The proliferation of invasive plants and aquatic weeds is of growing concern. Starting from 1989, Lake Victoria has been interested by the high infestation of water hyacinth with significant socio-economic impact on riparian populations.
In this paper, we describe an approach based on the time-series of MODIS to derive the temporal behaviour, the abundance and distribution of the floating macrophytes in the Winam Gulf (Kenyan portion of the Lake Victoria) and its possible links to the concentrations of the main water constituencies.
To this end, we consider the NDVI values computed from the MODIS imagery time-series from 2000 to 2009 to identify the floating macrophytes cover and an appropriate bio-optical model to retrieve, by means of an inverse procedure, the concentrations of chlorophyll a coloured dissolved organic matter and total suspended solid.
The maps of the floating vegetation based on the NDVI values allow us to assess the spatial and temporal dynamics of the weeds with high time resolution.
A floating vegetation index (FVI) has been introduced for describing the weeds pollution level.
The results of the analysis show a consistent temporal relation between the water constituent concentrations within the Winam Gulf and FVI, especially in the proximity of the greatest proliferation of floating vegetation in the last 10 kyears that occurred between the second half of 2006 and the first half of 2007. The adopted approach will be useful to implement an automatic system for monitoring and predicting the floating macrophytes proliferation in Lake Victoria.
Location: TE 12, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57502
Title: Studying interactions between climate variability and vegetation dynamic using a phenology based approach
Author: S Horion, Y Cornet, E Erpicum, B Tychon
Editor: F D van der Meer
Year: 2012
Publisher: Elsevier, Vol 20, February 2013
Source: Centre for Ecological Sciences
Reference: None
Subject: International Journal of Applied Earth Observation and Geoinformation
Keywords: Intra-annual variability, Non-linear process, phenology, climatic constraint
Abstract: In this paper we investigated if and how a signature of climate control on vegetation growth can be individualized at regional scale using time series of SPOT-VEGETATION NDVI and ECMWF meteorological data. Twelve regions characterized by dominant and stable cropland or grassland covers were selected in Europe and Africa. Our results show that the relationship between NDVI and meteorological parameters is highly complex and significantly vary trough the phenological cycle of the plants. Hence, interactions between vegetation dynamics and climate variability must be studied at a smaller time scale in order to identify properly the limiting factors to vegetation growth. Using NDVI metrics, vegetative phases (from green-up to maximum NDVI) and reproductive phases (from maximum NDVI to maturity) were identified for each region. Cross-correlation analysis revealed that, in most of the cases, the best scores of Pearson ' s r are obtained when we considered the vegetative phase (from green-up to maximum of NDVI) and the reproductive phase (from maximum of NDVI to maturity) separately. We also showed that climatic constraints identified using yearly proxies of climate and vegetation do not depict correctly or completelly the climate control on vegetation development. In that sense the complexity of the climate-vegetation relationship, which is spatially and temporally variable, is well underlined in this study.
Location: TE 12, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57501
Title: Spatio-temporal variability in remotely sensed land surface temperature, and its relationship with physiographic variables in the Russian Altay mountains
Author: R Van De Kerchove, S Lhermitte, S Veraverbeke, R Goossens
Editor: F D van der Meer
Year: 2012
Publisher: Elsevier, Vol 20, February 2013
Source: Centre for Ecological Sciences
Reference: None
Subject: International Journal of Applied Earth Observation and Geoinformation
Keywords: Land surface temperature (LST), Fast Fourier transform (FFT), Russian Altay Mountains, Spatio-temporal variability, physiographic predictors
Abstract: Spatio-temporal variability in energy fluxes at the earth ' s surface implies spatial and temporal changes in observed land surface temperatures (LST). These fluxes are largely determined by variation in meteorological conditions, surface cover and soil characteristics. Consequently, a change in these parameters will be reflected in a different temporal LST behavior which can be observed by remotely sensed time series. Therefore, the objective of this paper is to perform a quantitative analysis on the parameters that determine this variability in LST to estimate the impact of changes in these parameters on the surface thermal regime. The study was conducted in the Russian Altay Mountains, an area characterized by strong gradients in meteorological conditions and surface cover. Spatio-temporal variability in LST was assessed by applying the fast Fourier transform (FFT) on 8 year of MODIS Aqua LST time series, herein considering both day and nighttime series as well as the diurnal difference. This FFT method was chosen as it allows to discriminate significant periodics, and as such enables distinction between short-term weather components, and strong, climate related, periodic patterns. A quantitative analysis was based on multiple linear regression models between the calculated, significant Fourier components (i.e. the annual and average component) and five physiographic variables representing the regional variability in meteorological conditions and surface cover. Physiographic predictors were elevation, potential solar insolation, topographic convergence, vegetation cover and snow cover duration. Results illustrated the strong inverse relationship between averaged daytime and diurnal difference LST and snow duration, with a R2adj of 0.85 and 0.60, respectively. On the other hand, noctural LST showed a strong connection with elevation and the amount of vegetation cover. Amplitudes of the annual harmonic experienced both for daytime and for nighttime LST similar trends with the set of physiographic variables - with stronger relationships at night. As such, topgraphic convergence was found to be the principal single predictor which demonstrated the importance of severe temperature inversions in the region. Furthermore, limited contribution of the physiographic predictors to the observed variation in the annual signal of the diurnal difference was retrieved, although a significant phase divergence was noticed between the majority of the study region and the perennial snowfields. Hence, this study gives valuable insights into the complexity of the spatio-temporal variability in LST, which can be uksed in future studies to estimate the ecosystems ' response on chaning climatic conditions.
Location: TE 12, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57500
Title: Limnological Research in Libya
Author: M A Khan
Editor: Prof Brij Gopal
Year: 2010
Publisher: National Institute of Ecology, vol 36, No 2-3, September 2010
Source: Centre for Ecological Sciences
Reference: None
Subject: International Journal of Ecology and Environmental Sciences
Keywords: Development, Libya, limnology, present status, scope
Abstract: Apparent lack of interest in research on limnological aspects in Libya has restricted the scope of its development. Such a situation results from the almost non-existence of natural freshwater bodies. The recent creation of some man-made lakes and the Great Artificial River, a project considered by many as extraordinary human innovation, with substantial financial investment should, however, stimulate enthusiam for limnological research. The scientifically-oriented technological and theoretical impetus, multi-disciplinary seminars, environmental awareness among populace, establishment of research -cum-training centres and adequate financial support, hitherto grossly ignored, are vital ingredients to promote the scope of limnology in Libya. Ecological monitoring of Libyan inland water gains paramount importance for short and long-term environmental implications.
Location: TE 15, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57499
Title: Conserving biodiversity in protected area of biodiversity hotspot in India: A case study
Author: Sunil Nautiyal and Rama Rao Nidamanuri
Editor: Prof Brij Gopal
Year: 2010
Publisher: National Institute of Ecology, vol 36, No 2-3, September 2010
Source: Centre for Ecological Sciences
Reference: None
Subject: International Journal of Ecology and Environmental Sciences
Keywords: Biodiversity hotspots, indigenous people, socio-economy, Nagarahole National Park, Remote Sensing , GIS, vegetatin dynamics, landscape change
Abstract: The hotspots are the world ' s most biologically rich areas hence recognized as important ecosystems not important only for the rich biodiversity but equally important for the human survival as these as the homes for more than 20% of the world ' s population. Inida got recognition of one of the mega-diversity countries of world as the country is home of the two important biodiversity hotspots: the Himalaya in north and the Western Ghats in the southern peninsula. Policy makers and decision takers have recognized the importance of biodiversity (flora and fauna) and this has resulted to segregate (in the form of protected area) the rich and diverse landscape for biodiversity conservation. An approach which leads towards conservation of biological diversity is good efforts but such approaches should deal with humans equally who are residing in biodiversity hotspots since time immemorial. In this endeavor, a study was conducted in Nagarahole National Park of Nilgiri Biosphere Reserve, in Karnataka. Our empirical studies reveal that banning all the human activities in this ecosystem including agriculture, animal husbandary has produced the results opposite to the approach ' multiple values ' of national park. To monitor the impact, existing policies have been tested from a economic and ecological view-point. Unfortunately, the local livelihoods (most of them belongs to indigenous tribes) in the area have received setbacks due to the implementation of the policies, though unintentionally. However, the ecological perspective is also not showing support for the approach and framework of the current policies in the hotspots. Satellite data showed that the temporal pattern of ecosystem processes has been changing. An integrated approach for ecosystem conservation and strengthening local institutions for sustainable ecosystem management in such areas is therefore supported by this study.
Location: TE 15, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57498
Title: Microbial population and some soil enzyme activities in iron and chromite mine spoil
Author: Monalisa Rath, C S K Mishra and R C Mohanty
Editor: Prof Brij Gopal
Year: 2010
Publisher: National Institute of Ecology, vol 36, No 2-3, September 2010
Source: Centre for Ecological Sciences
Reference: None
Subject: International Journal of Ecology and Environmental Sciences
Keywords: Mine spoil, iron, chromite, bacteria, fungi, soil enzyme
Abstract: Open cast mining of iron and chromite ore cause extensive damage to the soil subsystem in mining areas in the state of Orissa, India. Large-scale mining produces huge quantity of mine spoil which is dumped near the quarries. This paper reports significantly lower number (P<0.01) of bacterial and fungal colonies in iron and chromite mine spoil in comparison to un-mined soil in rainy, winter and summer seasons. Activities of important soil enzymes such as invertase, amylase and cellulase in mine spoil in both the mines were significantly lower (p<0.01) than those in un-mined soil. Soil enzyme activities indicated significant positive correlation with the number of bacterial and fungal colonies in both mined and un-mined soil during all the seasons of study. Bacterial count, fungal count and enzyme activities indicated significant positive correlation with percent organic carbon irrespective of soil types.
Location: TE 15, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57497
Title: Hydrogeological data evaluation and solid waste management at Al-Akeeder landfill site, Jorden: Assessing pollution risks
Author: Abu Rukah Y, Marc A Rosen and Habes Ghrefat
Editor: Prof Brij Gopal
Year: 2010
Publisher: National Institute of Ecology, vol 36, No 2-3, September 2010
Source: Centre for Ecological Sciences
Reference: None
Subject: International Journal of Ecology and Environmental Sciences
Keywords: Al-akeeder Landfill site, risk index, groundwater system, vulnerability
Abstract: Large quantities of waste from urban, municipal and industrial sectors are generated worldwide and disposed of in landfill sites. This can cause significant problems for groundwater as contamination can occur by infiltration recharge. The present research addresses a concern through an assessment of the pollution risk to the aquifer system at the Al-Akeeder site based on hydrogeological data and solid waste management. We consider the following risk elements: potential rates of waste input, leachate collection system, type of refuse, physical state of the refuse and its water content, monitoring system, disposal criteria and final cover. The environmental compatibility is estimated by applying an integrated method based on the depth of the water, which is the depth of the piezometric level relative to the ground surface (the SINTACS rating relative to this parameter decreases with increasing depth), the effective infiltration, the unsaturated zone attenuation capacity, the soil attenuation capacity, the hydrological characteristics of the aquifer system, the hydraulic conductivity range of the aquifer, and the hydrologic role of the topographic surface average slope. The intrinsic vulnerability of the aquifer system within and around the study area is at a medium level. We suggest remediation measures to overcome the risks in the study area.
Location: TE 15, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57496
Title: Tree growth, biomass and productivity of wheat under five promising clones of Populus deltoides in Agrisilviculture system
Author: Alka Mishra, S L Swamy, S S Bargali and A K Singh
Editor: Prof Brij Gopal
Year: 2010
Publisher: National Institute of Ecology, vol 36, No 2-3, September 2010
Source: Centre for Ecological Sciences
Reference: None
Subject: International Journal of Ecology and Environmental Sciences
Keywords: Competition, poplar, root-shoot ratio, short rotation plantation, soil nutrients
Abstract: Variations in growth and above- and below-ground biomass of five promising clones (G3, G48, 65/27, D121 adn S7C1) of Populus deltoides and their effect on productivity of wheat under agrisilviculture system were evaluated. Monoclonal plantations were established in a randomized block design with three replications. Diameter at breast height (dbh) and tree height were consistently higher in clone 65/27 and lowest in clone S7C1. Total biomass varied from 48.5 to 62.2 Mg ha-1 in 6-year old clones; it followed the orde 65/27 >D121>G48>G3>S7C1. Stem wood accounted for 60.4 - 68.9% of total biomass, followed by coarse roots (12.2 - 18.9%), brachnes (12.3-15%), leaves (3.02-6.9%) and fine roots (1.5-2.7%). Grain yield of wheat was highest (3.66 Mg ha-1) in sole crop and decreased by 15-30.3% under different clones. The straw yield also showed similar trend. The reduction of grain and straw yield of wheat in clones was in order: S7C1 < G3<D121< 65/27 < G48. Available N, P and K in the soil improved significantly after 6 years of poplar planting. N was highest under clone S7C1 adn lowest under clone G48, while P was lowest under clone 65/27 and higher under clone G3. K was higher in clone S7C1 and lower in clone 65/27. At 0-20 cm depth, N increased from 14.9 to 24.1%, P from 17.2 to 23.3% and K from 3.1 to 5.1% under different clones after 6 years of planning.
Location: TE 15, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57495
Title: Population dynamics of Schima wallichii in an undisturbed vs a disturbed tropical forest stand of North-east India
Author: U K Sahoo and Lalfakawma
Editor: Prof Brij Gopal
Year: 2010
Publisher: National Institute of Ecology, vol 36, No 2-3, September 2010
Source: Centre for Ecological Sciences
Reference: None
Subject: International Journal of Ecology and Environmental Sciences
Keywords: Dispersal, fate of seed population, seed production, seedling recruitment, Schima wallichii
Abstract: Seed production, dispersal, fate of seeds, seedling recruitment, mortality and growth behavior of Schima wallichi (DC) Korth. Choicy were investigated during 2004-05 in an undisturbed and a disturbed tropica forest stand of North-East India. Five fruiting trees, each with different diameter at breast height, growing 100 m apart, were selected and concentric circles of 2.5 m radial increments were marked in both stands to study production, fate of seed population and seedling recruitment. Significant (P<0.01) differences were observed in mean seed yield per year between the stands and dbh class. More seeds disappeared during post-seed-fall period than during seed-fall period. Germination was lowest in the innermost circle as distance had remarkable effect (P<0.01). Seedling recruitment and relative shoot growth were higher (P<0.05) in the disturbed than the undisturbed stand in the first year. Controlled disturbance could be a favourable management tool for increased recruitment, survival and growth of Schima wallichi seedlings.
Location: TE 15, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57494
Title: Biomass and net primary production in an Imperata grassland of Barak valley, Assam, Northeast India
Author: Ashim Das Astapati and Ashesh Kumar Das
Editor: Prof Brij Gopal
Year: 2010
Publisher: National Institute of Ecology, vol 36, No 2-3, September 2010
Source: Centre for Ecological Sciences
Reference: None
Subject: International Journal of Ecology and Environmental Sciences
Keywords: Burning, Imperata cylindrica, Rhizome biomass, Belowground biomass, belowground net production
Abstract: Present study was undertaken to estimate the seasonal variations in biomass, primary productivity and dry matter transfer in a successional grassland dominated by Imperata cylindrica at Dargakona, Barak Valley, northeast India. Monthly changes in live shoot biomass exhibited a uni-modal growth pattern during the study period. Live shoots biomass during September - October was: 606.96 to 840.88 g m-2 in burnt plot; 853.75 to 511.94 g m-2 in unburnt plot. Use of fire as grassland management tool stimulated significant accumulation of belowground biomass; found as maximum in burnt plots (1368.44 g m-2). Annual aboveground net production ranged from 653.26 to 877.96 g m-2 in burnt plot and 527.12 to 936.08 g m-2 in unburnt plot. The belowground net production was: 973.79 to 1326.65 g m-2 (burnt plot) and 764.47 to 981.34 g m-2 (unburnt plot). A greater accumulation of belowground biomass and faster recycling through decomposition was found as an adaptation to maintain the grassland ecosystem. The grassland system showed net accumulation of surplus dry matter as total organic matter input into the system was greater than the total output. Imperata grassland was found to be seral in nature, which is maintained under the indigenous management system of farming community.
Location: TE 15, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None
ID: 57493
Title: Patterns and causes of predator - Human conflict in and around Itanagar Wildlife Sanctuary, Arunachal Pradesh, Northeastern India
Author: Surendra Varma, Ambika Aiyadurai, Narendra Babu and Vivek Menon
Editor: Prof Brij Gopal
Year: 2010
Publisher: National Institute of Ecology, vol 36, No 2-3, September 2010
Source: Centre for Ecological Sciences
Reference: None
Subject: International Journal of Ecology and Environmental Sciences
Keywords: Mithun, Carnivore-Human Conflict, Depredation, prey-predator interaction, Mitigation
Abstract: Mithun (Bos gaurus frontalis), a semi-domestic bovid is reported to be depredated regularly by predators particular the wild dogs (Cuon alpinus) and the villagers retaliate by killing the predators. The survey focused on the overall patterns and causes of the predator-human conflict. The result showed that the region has more predators (56%) than preys (44%). The encounter rate (3.43 km-1) and freqeuncy of occurrence of mithun signs (65%) were high compared to encounter rate (0.19 km-1) and frequency of occurrence (4%) of natural preys. Low encounter rates of wild prey or the lack of optimal prey species and the relatively high encounter rates of free ranging livestock were the causes for the conflict. The loss of mithun has a severe effect on the local community ' s (Nyishi) economy, culture and sentiments as it plays an integral role in their culture and tradition.
Location: TE 15, Biologicalsciences Building, IISc
Literature cited 1: None
Literature cited 2: None