Browsing by Author "Badola, Ruchi"

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A study on the resource dependence, human-wildlife conflict and community participation in forest management in Alaknand basin, Uttarakhand.
(wildlife Institute of India, Dehradun, 2018) Manral, Upma; Hussain, S.A.; Badola, Ruchi
Himalayan mountains are highly dynamic systems with both natural and anthropogenic disturbances acting as integral drivers of natural system dynamics in the region. The consequent changes brought into the system determine ecosystem productivity and the flow of ecosystem services to the humans. Any degradation of ecosystem functions and services will increase both the environmental and socioeconomic vulnerability of mountain communities which are highly reliant on natural systems, particularly forests of the area. The objectives of the study were to: a) quantify the extent of extraction of plant resources in different villages located at different elevations; b) assess the availability of major phyto-resources in and around the villages and surrounding forests along elevational gradient in the Alaknanda river basin; c) assess the extent of human-wildlife conflicts affecting the livelihood in the study area; and d) measure the contribution of community forest management practices in livelihoods of local communities. Four hypothesis were framed as: a) patterns of both availability and the extraction of forest resources in the study area xi change along the elevational gradient; b) human–wildlife conflicts negatively impact livelihood generation of affected communities; c) community forest management practices play a role in augmenting livelihood of local communities in the area; and d) better managed forests in an area are the result of community participation in forest management
A study people – Protected Area interface at Keibul Lamjao National Park, Manipur.
(Wildlife Institute of India, Dehradun, 2014) Leima, Sanggai; Badola, Ruchi; Hussain, S.A.
Keibul Lamjao National Park (KLNP) is the only natural home of the remnant population of endangered brow antlered deer or Sangai whose habitat is the phumdi- a unique part of the habitat of KLNP. It is a floating mass of entangled vegetation formed by the accumulation of organic debris and biomass with soil particles. It covers approximately two thirds of the area of the park and the thickness varies from a few centimeters to about two meters. However, due to illegal exploitation of resources from the park in the form of vegetable and fuelwood collection, the park is facing consistent anthropogenic pressures which are posing a threat to the habitat of Sangai. A need arises to understand local people’s dependence on the park as well as their perceptions and attitudes in order to devise management strategies to solve parkpeople conflicts. Thus, the main objectives of the present study were to (a) examine the socioeconomic and demographic conditions of the villagers around KLNP, (b) quantify the resources extracted from the park and its contribution to the livelihoods of the local people, (c) assess the impacts of anthropogenic activities on the wildlife habitat, (d) examine the conservation awareness and attitudes of people towards the park and alternative livelihood options and (e) to assess the economic value of the park in terms of recreation for the conservation of Sangai and KLNP.
An assessment of eco-development initiatives in Periyar Tiger Reserve.
(Wildlife Institute of India, 2007) Bhardwaj, Anil; Badola, Ruchi
The present study was undertaken with the objectives of examining the kind of input provided to local communities (Ecodevelopment committees) through ecodevelopment program. To examine the impact of ecodevelopment program and to critically examine the factors responsible for the success and failure of ecodevelopment initiative with respect to Periyar tiger reserve and suggest measures for effective implementation of the future program. The study was carried out in and around Periyar tiger reserve, Kerala
An Assessment of Recreational Value of Periyar Tiger Reserve and the Distribution of Tourism Income Among Stakeholders
(Wildlife Institute of India, Dehradun, 2013) Sebastian, Subish; Badola, Ruchi; Hussain, S.A.; Uniyal, V.K.
Protected Areas (PA) are cornerstone for biodiversity conservation and their role in maintaining flow of ecosystem goods and services is now being acknowledged. But it is difficult to justify their creation when demand for employment, infrastructure increases, and thus government may take decision looking at the short term economic prosperity. When economic wealth generated through development activity and compared to the income generated from P A, the former does over shadow the income generated from P A conservation. But in doing so, the other benefits of conservation remain unaccounted. These benefits range from provision of fuel, fodder, food, to local communities at local scale, and provision of clean water, air purification, and aesthetic and bequest value at regional or larger spatial scales. Accounting of the services such as recreational value provided by the P A can help generate support for conservation at all spatial scales. The Periyar Tiger Reserve (PTR) is a popular tourist destination visited by the people by national and international tourists. Ecotourism programs are implemented in PTR as an integrated conservation and development project for sustainable development of local communities, and to create awareness as well as to promote conservation. The success of this program can be largely attributed to its charismatic flagships species and its unique water safari where tourists can enjoy the wildlife in scenic background on either side of the Periyar Lake. Encouraged by the success of tourism, more and more communities have enrolled themselves in different activities which are either directly or indirectly connected with tourism. Being the most visited and popular P A, it becomes imperative to explore the recreational value of the PTR. Also, since local communities living in and around PTR are traditionally dependent on the reserve's resources and are being involved in ecotourism activities, it is essential to assess the distribution of ecotourism benefits stakeholders. It is well known that support for conservation can be generated if the communities are obtaining benefits from conservation linked tourism. But the monetary leakages in community based tourism or ecotourism often undermine the support for conservation. Thus, PTR being an ecotourism site, it is crucial to know the monetary leakages occurring onsite in PTR and how this revenue related linkages and leakages mould the attitude of stakeholder towards biodiversity conservation? The recreational value of PTR was calculated using the Zonal Travel Cost Method. This method helps to derive the demand function for the site. Questionnaire survey was carried out to know the socio-economic status, the monetary flow in the household; examine people attitude towards PTR. One hundred twenty five in-depth interviews were conducted among eight major stakeholders whose dependency on tourism was very high. For assessing the best existing model which underlines the principles of ecotourism, the tourism was classified into three kinds, first one Tourism run by private party, secondly Tourism run by local community, and finally Tourism run by Periyar Tiger Reserve's EDCs. The recreational value of the reserve was estimated as Rs. 44176299.32. With the cost per visitor being Rs. 63.56 the consumers' surplus was large, showing the willingness of visitors to pay for wildlife recreation. The socio economic study reveals that the 'Tourism Programs' run by EDCs are the best models providing 100% share to local communities, followed by the home stays run by local communities. Monetary leakages were highest in case of resorts (82%), followed by 20% leakages from home stay, while no leakage was observed at EDC. The leakage of 200/0 is due to the link with foreign players like tour operators and other resorts who market their products. Even though resorts that the private player run programs claim as ecotourism, only 14.9% of share goes to the local community. The results obtained indicate that the conservation attitudes are not influenced by income class, education, gender and age of the respondents. Attitude of local community is highly Positive towards forest and wildlife conservation, which can be attributed to the benefit sharing approach developed by Forest Department. The findings indicate that the participatory approach and benefit sharing are good means to promote sustainable use of natural resources. High consumer surplus for visits to PTR suggests that recreational value of PTR is higher than the current expenditure by the people. Thus, there is a poss~bi1ity of increasing the ecotourism. fee, which would contribute to higher turnover for the forest department. Tourism income is not equitably distributed among stakeholders. The percent of locals employed in profitable ecotourism ventures was less, resulting in 82% monetary leakages. Support for conservation is very high among all stakeholders in PTR but this scenario or this state can't be clearly attributed to the benefits derived from the tourism. Forest department play a major role in creating awareness. Conflict among stakeholder group about the revenue sharing and the mode of aggressive marketing does not affect their perception about wildlife. Occupation does not affect the attitude of stakeholders. Benefits derived from tourism lead to positive attitude of local communities and enhance conservation support among local communities. Higher employment of locals in the resorts, massaging parlours and as taxi and tour operators would lead to sustainability of ecotourism in PTR. Capacity building and financial assistance to the locals would enhance local employment and minimize monetary leakages and thus increase benefits to the locals.
Aspects and determinants of human-carnivore conflict in tiger corridors of Terai, Western Circle, Uttarakhand
(Wildlife Institute of India, Dehradun, 2024) Ranjan, Vivek; Badola, Ruchi; Dhakate, Parag Madhukar
Human-wildlife interaction with negative consequences, commonly termed Human- Wildlife Conflict (HWC), is a global conservation challenge. Understanding the cause-effect relationship resulting in HWC is essential to resolve and mitigate the conflict and promote human-wildlife coexistence. However, the increasing human population and rapidly changing demography severely affect the contiguity of forested landscapes and habitats, becoming a major challenge for conserving wide-ranging large mammals. The conservation and protection of wildlife corridors are vital for the survival of wide-ranging large mammals in the landscape. The Terai landscape, located in the foothills of the Himalayas and proximate plains of the Indian Himalayan Region, is one of the most significant and distinct transboundary landscapes worldwide. In recent decades, the Terai region has recorded a rapid increase in human population and industry growth due to its conducive topography for industrial development in the hilly state of Uttarakhand. The region is also home to diverse wildlife, and increased conservation efforts and protection have yielded positive results, with an increased population of endangered wildlife species like tigers in the last few years. With increasing population and shrinking wildlife habitat, human and wildlife's peaceful and sustainable coexistence is distressed, leading to an increased probability of negative human wildlife interaction. The study aims to assess the aspects and determinants of Human-Large Carnivore Conflict (HLCC) in the wildlife corridors and their adjoining habitats in the eastern terai landscape of Uttarakhand state of India. The large carnivores considered for the purpose of this study are tiger and leopard only, which are common in the landscape of the study area. The study has three objectives: to assess the nature and extent of human-wildlife conflict due to large carnivores, the habitat structure and composition of the wildlife corridors and the diet preferences and consumption patterns of large carnivores in the corridor habitat. The thesis has been divided into six chapters, where the first two chapters are a general introduction and literature review, and the following four chapters talk about socio-ecological factors, habitat quality of corridor habitats, implications of habitat changes on HLCC, and diet profile of two sympatric large carnivores of the study area, i.e. tiger and leopard. The study area is part of Terai Arc Landscape (TAL), a Tiger Conservation Landscape (TCL_Id-44) of global importance with the potential for increasing the wild tiger population. The study was conducted in the delineated wildlife corridors for large mammals in the terai landscape of Uttarakhand state of India. The study focuses on the critical wildlife corridor in high tiger density and transboundary areas, providing crucial connectivity of habitats and wildlife populations. The study area is divided into two study blocks for the spatial convenience of the study: Block 1 comprises the Kosi Corridor, and Block 2 comprises theKilpura-Khatima-Surai (KKS) and Boom-Brahmadey (BB) corridor and their adjoining forests. Kosi corridor connects Corbett Tiger Reserve to Pawalgarh Conservation Reserve in Ramnagar forest division. The KKS and BB corridors in Block 2 have contiguous and interconnected habitats adjoining Nandhaur Wildlife Sanctuary in the Haldwani Forest Division of Uttarakhand, connecting to Pilibhit Tiger Reserve and Sukhlaphanta National Park through forest of Nepal. The study area is rich in faunal diversity and home to a few important large mammals, such as the Tiger, Leopard and the Asian elephant. In order to understand the nature and extent of HLCC in the landscape, it was essential to understand the socio-economic conditions and perceptions of the communities. We conducted random household (HH) semi-structured questionnaire surveys and discussions in the villages located in the corridors. The information on HWC compensation records was also collected from the Uttarakhand Forest department to analyze the patterns of conflict incidences. The results show that livestock grazing, fuelwood, and fodder collection from the forest are common and prevalent practices. About 90% of the households have LPG connections at home, yet most HH members still visit forests for collection. The education level among the respondents is low, with maximum HHs having an annual income of less than one lakh. The major occupation as the primary source of income in the study area is casual labour work, and most of the HHs have land holdings of less than an acre. The incidences of HLCC mainly occurred inside the forest areas and later half of the daytime, i.e., from noon to evening. The season of incidence and condition of the body of the depredated livestock show significant association with the place of incidence. The seasonality pattern of HLCC incidences shows nan incidents during monsoon in study block 1, whereas in block 2, it is in winter. The trend of incidences over the last 13 years in study block 1 shows a peak in tiger and leopard cases during July and August and forecasts an increase in cases over upcoming years. The annual trend of HLCC in the two study blocks is significantly different. The nature of HLCC in the study area is both tangible, which can be visually observed and intangible, which has imbibed effects with direct and indirect impacts. The tangible nature of large carnivore conflict is the direct impacts in the form of human casualty and livestock depredation. The intangible nature of the conflict with indirect impacts are psychological— fear of large carnivores and sense of insecurity, social — loss of livelihood and family security. The aspects of HLCC are socio-ecological, with both the social factors of communities residing around the forest and the ecological processes influencing the HWI. In rapidly transforming human-dominated landscapes, anthropogenic activities and disturbances significantly impact the ecological processes and landscape characteristics. The habitat quality was assessed using the nested quadrat method for vegetation and camera trapping for large carnivore population estimation and prey availability. The camera trapping was done using the capture-recapture method in 2 sq. Km sampling grids. The results show maximum tree diversity in the BB corridor, with good to fair Sal regeneration in all three corridors. However, most of the tree species show poor to no regeneration. Sixty-one species of trees were recorded from the three corridor areas sampled. As an invasive plant species, Lantana camara is more prevalent and extensive in study block 1 and Ageratina adenophara in block 2. The grassland habitat is shrinking, and less in all three corridor habitats.Anthropogenic disturbance is high in block 2 in comparison to block 1, while tree cutting and lopping are the most prevalent anthropogenic disturbance signs observed in all three corridors at equivalent levels. The medium-sized prey is the most abundant prey base in both the study blocks, with maximum relative abundance of Spotted deer. However, the relative abundance of Sambar deer is higher in the bhabar topography area of corridors and maximum in large sized prey. The study block | has 16 adult tigers and 22 leopards, while block 2 has 31 adult tigers and 40 leopards. The wildlife habitats of the three corridor areas studied have good tree diversity and complexity. However, the regeneration of tree species is poor for most species. The shrub and herb cover are also low for most areas in all three corridors, affecting the lower structure of forest habitats. The extensive growth of weed species like Lantana camara and Ageratina adenophora also affects understory species' composition, structure, and tree regeneration. The poor regeneration and deteriorated lower strata vegetation with sparse undergrowth are unfavourable conditions for breeding large carnivores, which requires dense patches for hiding their offspring. The lack of such patches and high human disturbance forces them out of the forest to use sugarcane farm fields to raise and hide their young ones, as has been observed in many instances in the Terai-Bhabar landscape. Using human-modified landscapes by large carnivores for their life cycle stages is unsuitable for human-wildlife coexistence and increases the vulnerability of negative HWI. ASS Bind Expert in CC EE TTT The implications of habitat transformations on HLCC were assessed by identifying spatial conflict hotspots based on compensation records of the last 14 years and the magnitude of incidents related to large carnivores in different locations. The Land Use Land Cover (LULC) and Enhanced Vegetation Index (EVI) change over twenty years were assessed. The Nighttime Light (NTL), an indicator of human growth and activity centres, was also assessed for a decadal change. The impact of changes in these habitat attributes on hotspots was assessed using the Generalized Linear Model. The model shows that the impact of vegetation health change and human activity or disturbances have a significant effect on conflict hotspots. The very high-risk zones are also located in the delineated corridors near bottleneck areas. The study has highlighted that the implications of habitat changes are significant for HLCC. The implications of habitat changes vary with the landscape and regional attributes, as observed in our study at two sites with varied underlying factors other than habitats. In the present conservation paradigm of large carnivores, it is essential to understand the feeding habits and prey-predator dynamics outside protected areas. Our study fills this gap in our understanding of the dietary habits of sympatric large carnivore species outside protected areas (PAs) in the terai landscape of India. It focuses on the feeding ecology of tigers and leopards in wildlife corridor habitats outside PAs. Our results show a significant dependence of tigers and leopards on medium-sized prey, i.e., Wild boars and spotted deer. It also shows a 93% overlap between tiger and leopard diets in the study area. However, it is crucial to augment wild prey availability in the wildlife corridor habitats, where grazing pressure is high. The problem of stray cattle has further escalated the issue of livestock depredation by large carnivores. Conservation strategists must consider the feeding habits of the predators and how these are changing due to the induced effects of anthropogenic activities.
Assessment of provisioning service and the recreational value of Nanda Devi Biosphere Reserve.
(Wildlife Institute of India, Dehradun, 2015) Pariva; Hussain, S.A.; Badola, Ruchi
The ecological services and the natural capital stocks that produce them are critical to the functioning of the earth’s life-support system. Because of the direct use of the structural value provided by natural ecosystems and in most cases of free access to such ecosystems they are under heavy utilization pressure. The harmful effects of degrading ecosystem services are being disproportionately borne by the poor and are contributing to the growing economic inequities as well as environmental hazards to which the poor are the most vulnerable. Present work aimed to understand the status of the provisioning and recreational services of the Nanda Devi Biosphere Reserve (NDBR) and their contribution in securing wellbeing of local communities. The study was carried out with five objectives: (a) assess the socioeconomic status of local communities in NDBR, (b) quantify the provisioning services of the Reserve in terms of resource extraction, (c) estimate the recreational and religious value of the Reserve and its contribution to local livelihoods, (d) assess the extent of human-wildlife conflicts in the Reserve; and to (e) examine the attitude of local communities towards the conservation of the Reserve.
Food habits of sympatric large herbivores in Kaziranga National Park, Assam, India
(Wildlife Institute of India, Dehradun, 2023) Devi, Anita; Hussain, S.A.; Badola, Ruchi
This study aims to a. address the welfare state of Asiatic lions (Panthera leo persica) based on environmental factors and individual-level differences, and b. propose a methodological framework for evaluation and improvement welfare in captive environments. In this chapter, I will set up the context for this study with a brief chronology of our understanding of the origin of animal welfare and the science of zoo biology and their relevance to the Asiatic lion conservation breeding programme (CBP)
Pastoral Practice and Herders Attitude Towards Wildlife in South Gobi Mongolia
(Wildlife Institute of India, Dehradun, 2011) Mijiddorj, Tserennadmid; Rawat, G.S.; Badola, Ruchi
This study deals with analysis of traditional and current pastoral practices in south Gobi areas of Mongolia with emphasis on herders' attitude towards wildlife. The study was conducted during December 2010 to May 2011. The major objectives of the study were to study: (i) Nomadic herders' pastoral practices and drives of changes. (ii) Influence of pastoral practices on human-wildlife conflict and (iii) nomadic herders' attitude towards wildlife. I used questionnaire surveys in two villages in Gurvantes soum to find out the past and current patters of herding, herders' attitudes and major drivers of changes. The villages were selected based on the fact that in one village (Tost), Snow Leopard Conservation initiatives are going along with livestock insurance and research programs, while in another village (Baysah) no conservation initiatives have been undertaken. However the range use patterns by the local herders and the level of conflict with wild carnivores is the same in both areas. A total of 144 individuals from different age, gender and educational background were interviewed, 74 in 8 aysah (nonconservation) area and 70 from Tost area where snow leopard conservation activities are taking place. The data were analyzed using SPSS Statistical Package for Social Sciences (SPSS) PC version 16.0 for . Generalized linear model GLM linear and negative binomial with log linear model. The study reveals that the pastoral practices among the herders in the study area is largely influenced by land tenure, mining disorder, school kids' admissions and development factors. Assessment of pastoral practice changes revealed that 84.7% herders had highly altered their seasonal movement pattern which can affect pasture degradation and regeneration of grass growth. Owing to changes in pastoral practices, the herders have become more prone to lose more livestock to carnivores. Using GLM models it is proven (Wald chi-square =4.551 df=11 P=O.033) that recent faulty pastoral practice change (.e.g, nuclear family, vulnerable for natural disaster and herding techniques) explains livestock losses due to the carnivores. It requires implementing livestock husbandry management in better ways. Gurvantes soum's two different villages offered ideal condition to compare carnivore conservation efficiency and way to forward to mitigate such human-wildlife conflict. Study indicated that in generally herders positive perception towards ungulates whereas carnivores Tost (conservation area) area herders' tolerance level was higher than those of baysah area (non-conservation area) (t=5.23, df=89. P
Plant community structure and biomass productivity of seasonally flooded wetlands of Brahmaputra floodplains, Assam India
(Wildlife Institute of India, Dehradun, 2024) Sharma, Monika; Hussain, S.A.; Badola, Ruchi
The study aimed to (a) examine the seed bank characteristics of seasonally flooded wet grasslands (b)Examine the plant species composition of these wet grasslands in terms of species diversity, richness and community structure (c) determine the biomass productivity of these wet grasslands in different inundation and management regimes and invasive removal (d) quantify the amount of biomass extracted by local people from Kaziranga tiger reserve,
Recent Changes in the Phumdis of Keibul Lamjao National Park, Manipur and Management Implications
(Wildlife Institute of India, Dehradun, 2015) Tuboi, Chongpi; Hussain, Syed Ainul; Badola, Ruchi; Leima, Sanggai; Babu, Mattozbiyil Mabi
Role of provisioning and cultural ecosystem services of Protected Area in supporting human health
(Wildlife Institute of India, Dehradun, 2024) Shekhar, Shashank; Badola, Ruchi
Ecosystem Services (ES) are vital ecological functions that contribute significantly to human well-being. This study explores the provisioning and cultural ecosystem services provided by Kaziranga National Park (KNP), a UNESCO World Heritage Site in Assam, India, and their role in supporting the health and well-being of local communities. Despite extensive research on the general benefits of natural environments, specific studies on protected areas and their direct health benefits are sparse. This research addresses this gap by assessing how KNP's ecosystem services influence human health and well-being. The study aims to evaluate the multifaceted benefits of KNP, focusing on provisioning services such as fish, wild fruits, vegetables, and medicinal plants, as well as cultural services including recreation, aesthetic value, and traditional cultural practices. Methodologically, the research employs household surveys, interviews, economic valuation techniques, and ethnographic studies to gather comprehensive data on resource usage, cultural significance, and health outcomes. Data collection spans from 2018 to 2022, involving 750 households from 31 villages within KNP's zone of influence, along with a tourist survey of 379 individuals who visited KNP. Key findings reveal that local communities heavily depend on resources from the vicinity of KNP, with significant economic and health benefits. Provisioning services such as fish and wild vegetables contribute substantially to food security and traditional healthcare, while cultural services enhance mental health and community cohesion. The study establishes a positive correlation between the use of these ecosystem services and improved health metrics, such as reduced disease incidence and better overall quality of life. Additionally, cultural engagement within the park correlates with higher household income and educational access. The research underscores the critical role of natural ecosystems in supporting human health and advocates for integrated conservation and health policies. Sustainable management practices, community engagement, and technological advancements are recommended to preserve KNP's biodiversity and enhance its benefits. Future research should expand to include supporting and regulating services and assess the long-term impacts of climate change on KNP's ecosystem services. In conclusion, this study highlights the significant socio-economic and health benefits derived from KNP's ecosystem services, emphasizing the need for policies that integrate environmental conservation with public health and community development. Kaziranga
Storied Landscapes : A Study of the Ecological Narratives of the Bhotiyas (TOLCHHAS, MARCHAS AND JADS) of Uttarakhand
(Wildlife Institute of India, Dehradun, 2021) Saurav, Devshish; Badola, Ruchi; Baroth, Anju
Himalaya is still young and growing; the formation of Himalayan ranges is still going on Vast terrain, unstable stretches, extreme climatic conditions and other potential hazards are major challenges for the inhabitants of the area. Humans have survived all such challenges since ages, it is a story of settlers’ survival and sustainability. The story of survival narrates the suitability of the wise traditional practices and sustainable community based approach. This process follows the lessons learnt from trials and errors, cultural assimilation and devoted observations. This is reflected in socio-cultural spheres, technological understanding and institutional structure of local Bhotiya (Jads, Tolchha, Marcha) society.It is important to understand the Himalayan settlers historically, the cultural practices of inhabitants help us in understanding the background, origin and nature of local traditions. Jads,Tolchhas and Marchas are such ethnic groups from Uttarakhand who evolved and settled in Himalayan region over a course of time. They follow different cultural traits, livelihood practices and hold different socio-political and religious affiliations. They inhabit the northern and upper ranges of Himalayas. The blend of Tibetan Buddhism and Hinduism is reflected from their culture and nomadic lifestyle. Since very old time the Middle Himalayan region of Garhwal and Kumaun have been under the influence of Hinduism.
Study on Ecological & Socio-Economic Impact of Invasive species, Prosopis juliflora and Lantana camera and their removal from forest, common and fallow land of Tamilnadu
(Wildlife Institute of India, Dehradun, 2018) Sivakumar, K.; Rawat, G.S.; Badola, Ruchi; Adhikari, B.S.; Kamalakannan, B.
Study on ecological and socio-economic impact of invasive species, Prosopis juliflora and Lantana camara and their removal from forest, common and fallow land of Tamilnadu
(Wildlife Institute of India, Dehradun, 2018) Sivakumar, K.; Rawat, G.S.; Badola, Ruchi; Adhikari, B.S.; Kamalakannan
1) Prosopis juliflora is an invasive, drought resistant, evergreen fast growing pheratophyte widely distributed in India and also in arid and semi-arid tropical countries. It is a highly valued wood source for rural people in India. The P. juliflora is believed one of the worst invaders affecting natural and man-made ecosystems and its local biodiversity in Tamil Nadu. In this context, this study was conducted aimed to assess the distribution patterns of P. juliflora and its impacts in three different agro-climatic zones of Tamil Nadu. 2) In 1959, Prosopis juliflora was introduced in Tamil Nadu to meet the fuelwood requirements of the rural poor people and to re-vegetate the degraded lands but it spread at faster and occupied almost all agro-zones of Tamil Nadu. In India, P. juliflora was considered as one of the worst invaders in the country affecting natural ecosystems and local biodiversity. In order to eradicate this species from natural forests, preparation of a restoration plan is desirable with knowledge on ecology and impacts of P. juliflora in Tamil Nadu. Keeping this in view, Wildlife Institute of India with support of Tamil Nadu Forest Department assessed the extent and abundance of P. juliflora in forest, common and fallow land of Tamil Nadu. Initially, the study was started in the southern zone of Tamil Nadu and later in other agro-climatic zones of Tamil Nadu (i.e. Cauvery delta zone (Nagapattinam district), Southern zone (Ramanathapuram district) and Western zone (Sathiyamangalam Tiger Reserve, Erode district). 3) Totally ninety transects were laid randomly in three agro-climatic zones of Tamil Nadu. Each transect of 2 km length, it had six 15 m radius plots at equal distance of 400 m to quantify the environmental parameters such as vegetation structure and composition, cover percentage of grass, native herbs, weeds, animal pellet and bird abundance, etc., was recorded by using standard methods on the same transect. Influence and impact of Prosopis juliflora and its and socio-economic status were assessed by using a questionnaire survey in entire taluks of three agro-climatic zones. 4) The results revealed that occupancy of Prosopis juliflora was more in the southern zone compared to the other two zones. Southern zone occupies 79.4% of Prosopis juliflora invaded in this region than western zone (46%), and in Cauvery delta zone (32%). Density (F = 34.35, P < 0.05) and frequency occurrence (%) of P. juliflora were also higher in the southern zone followed by western zone and Cauvery delta zone. The richness and native biodiversity of plants and related herbs, shrubs were highly ruined in southern zone followed by Cauvery delta and western zone. The highest extent of Prosopis was observed in the entire seven taluks of the Ramanathapuram district (southern zone) compare to the Nagapattinam taluks (Cauvery delta zone) and Sathyamangalam Tiger Reserve ranges (western zone). Except Prosopis juliflora and Lantana camara; Parthenium hysterophorus and 2 Chromolaena odorata caused huge smash up to the native ecosystems in some ranges of Sathyamangalam Tiger Reserves. 5) In Ramanathapuram district, the abundances of herbs such as Tephrosia purpurea, Crotons sparsiflorus, and Cleome viscosa were significantly lesser in P. juliflora invaded plots as compared to the non-invaded plots. Relative abundance of birds such as Pavo cristatus, Conturnix conturnix and Acridotheres tristis were positively correlated with P. juliflora abundance in Ramanathapuram taluks. The western zone where the habitat dominated by P. juliflora was observed with low abundances of wild ungulates. 6) Driest environment settings of southern zone favored more P. juliflora than other two agro-climatic zones that are comparatively wet. 7) The study found that the impact of Prosopis in the forested landscapes of Tamil Nadu, especially in Sathyamangalam Tiger Reserve seemed to be adversely affecting the distribution of native biodiversity. 8) Dry zone of Tamil Nadu i.e. at Ramanathapuram the groundwater level-soil moisture conditions, humidity and temperature under the canopy cover were better in the habitats dominated by P. juliflora but in the forested landscapes such as in the Sathyamangalam TR, these environmental factors were comparatively lesser than other habitats of the zone. It reveals that P. juliflora in the forested landscape is not good for natural environmental settings as well as the biodiversity of the region. 9) In all zones that were studied in Tamil Nadu, the P. juliflora was observed to be allelopathic that discouraging other plants from growing around them and seems to be toxic to other biotas in ways that allow the invasives to monopolize the space, sunlight, and nutrients at the exclusion of other species. Plant diversity was observed significantly low at P. juliflora dominated habitats than other habitats of Tamil Nadu including in the Ramanathapuram District. In the native habitats of P. juliflora, the other species have developed a mechanism to counter the allelopathy of P. juliflora, but such defense seems to be not available to several native plants of Tamil Nadu. 10) The study could not find any significant impact of Prosopis juliflora and Lantana camara on the productivity of agricultural crops grown adjacent to the dense growth of Prosopis juliflora and Lantana camara on the bund or as a pure stand. 11) Prosopis juliflora, which is adapted to survive and thrive in diverse environments including very harsh dry environments, was a major boon for impoverished people subsisting in the Ramanathapuram District as it provides 3 them with badly needed valuable provisional services; fuelwood, charcoal, animal feed, constructional materials, reclamation of degraded soil, etc, but the Prosopis juliflora was observed to be adversely affecting both environments as well as native biodiversity in other zones of Tamil Nadu. 12) It was found that wetlands in the arid region are highly susceptible to Prosopis invasion and these wetlands were once used by migratory birds in large numbers but not nowadays that is might be due to high abundances of invasive species. 13) Although, alien invasive species such as P. juliflora and L. camara are adversely affecting the native biodiversity especially in the Western Zone and Cauvery Delta but it has livelihood values in the Southern Zone especially Ramanathpuram and adjoining districts of Tamil Nadu. 14) The study also found that the available nitrogen, phosphorus and organic carbon in the soil were high in highly invaded areas compared to less or non-invaded sites especially in the Southern Zone. 15) Economic analyses also revealed that the benefits of the P. juliflora invasion in the southern zone are higher than the costs. However, some aspects such as increased risk of water table and long-term ecological changes were not examined, thus making the total economic valuation incomplete. 16) P. juliflora and L. camara spread can be halted by actions such as clear cutting/up-rooting followed by burning of the stump of P. juliflora and keeping up-side down of stump of L. camara. Alternatively, ways can be found to utilize the existing stands of P. juliflora so that frequent harvesting can exert a check on its expansion in the non-forested landscape. Minimum, 10 years of weed management plan should be made mandatory of all Management Plans of all Protected Areas and other reserve forests of Tamil Nadu to successfully halt the expansion of these invasive species so that the native biodiversity are conserved. 12) The study concludes that complete eradication of P. juliflora and L. camara is inevitable in the forested landscapes and Protected Areas of Tamil Nadu. However, the study recommend that sustainable management and control of P. juliflora may be a better solution than eradication in the Southern Zone.
Vegetation Structure Distribution and Carbon Sequestration Potential of Mnagroves Along Soil Salinity gradient in Coringa Wildlife Sanctuary Andhra Pradesh
(Wildlife Institute of India, Dehradun, 2015) Anand, Dipak; Gopi, G.V.; Sivakumar, K.; Badola, Ruchi
This study was carried out with aim of understanding the mangrove dynamics along with carbon storage abilities of various mangrove species that occur in the Coringa Wildlife Sanctuary and also the various environmental factors that would probably determine the mangrove structure, their distribution and carbon sequestration potential, from December 2014 to May 2015.