Dipto Sarkar

Dipto Sarkar
Carleton University · Department of Geography and Environmental Studies

Doctor of Philosophy

About

44
Publications
8,595
Reads
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338
Citations
Citations since 2017
37 Research Items
326 Citations
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2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120

Publications

Publications (44)
Article
Full-text available
Flies form high-density associations with human settlements and groups of nonhuman primates and are implicated in transmitting pathogens. We investigate the movement of nonhuman primate-associated flies across landscapes surrounding Kibale National Park, Uganda, using a mark-recapture experiment. Flies were marked in nine nonhuman primate groups at...
Article
Full-text available
Many of the world’s most biodiverse regions are found in the poorest and second most populous continent of Africa; a continent facing exceptional challenges. Africa is projected to quadruple its population by 2100 and experience increasingly severe climate change and environmental conflict—all of which will ravage biodiversity. Here we assess conse...
Article
OpenStreetMap (OSM) is the world’s largest peer-produced geospatial project. As a freely-editable open map of the world to which anyone may contribute or make use of, the dynamics and motivations of its contributors have been the object of significant scholarship. A growing phenomena in the OSM community is the increasing contributions of paid edit...
Article
Sixty years ago, Rachel Carson published her book Silent Spring, which focused the world's attention on the dangers of pesticides. Since that time human impacts on the environment have accelerated and this has included reshaping the chemical landscape. Here we evaluate the severity of exposure of tropical terrestrial mammals to pesticides, pharmace...
Article
As deforestation progresses in the tropics, wildlife populations are increasingly restricted to forest fragments. Here we study genetic population structure in the endangered Ashy red colobus (Piliocolobus tephrosceles) population in the forest fragments surrounding Kibale National Park, Uganda. Subsequently, we use landscape features (elevation, r...
Article
Full-text available
With open-access publishing authors often pay an article processing charge and subsequently their article is freely available online. These charges are beyond the reach of most African academics. Thus, the trend towards open-access publishing will shift the business model from a pay-wall model, where access to literature is limited, to a pay-to-pub...
Article
Traditionally, OpenStreetMap (OSM) has been recognized as a volunteered geographic information (VGI) project. In recent years, many corporations have enlisted teams of mappers to edit data on OSM. These teams of corporate editors (CEs) can quickly edit large swaths of data using a variety of methods. Consequently, there are new tensions over possib...
Article
Full-text available
Parks are essential for protecting biodiversity and finding ways to improve park effectiveness is an important topic. We contributed to this debate by examining spatial and temporal changes in illegal activities in Kibale National Park, Uganda between 2006 and 2016 and used existing data to evaluate how the changes were correlated with the living c...
Article
There is a growing view in conservation science that traditional ways to evaluate publications, researchers, and projects are too slow. This has led to a rise in the use of altmetrics, which are metrics based on social media data, news pieces, blogs, and more. Here we examine altmetric data linked to nearly 10,000 papers published in 23 conservatio...
Article
Full-text available
Background Tropical forests are repositories of much of the world’s biodiversity and are critical for mitigation of climate change. Yet, the drivers of forest dynamics are poorly understood. This is in large part due to the lack of long-term data on forest change and changes in drivers. Methodology We quantify changes in tree abundance, diversity,...
Preprint
With open-access publishing authors pay an article processing charge and subsequently their article is freely available online. These charges are beyond the reach of most African academics. Thus, the trend towards open access publishing will shift the business model from a pay-wall model, where access to literature is limited, to a pay-to-publish o...
Article
Full-text available
Research is an interconnected global endeavor. Networks of research collaborations are often using Social Networks Analysis. Its variant Spatial Social Networks allowing explicit embedding of spatial information in the network. Variations in incorporating spatial information results in multiple conceptualizations of networks, enabling exploration o...
Article
The Himalayas hailed as the ‘water towers of the world’ feed many perennial rivers which form the lifeline of the Indian sub-continent. Climate change induced rising global temperatures and changing rainfall patterns are currently threatening the glaciers that feed the rivers. The combination of these factors is causing water stresses to a part of...
Preprint
Full-text available
Background: Tropical forests are repositories of much of the world’s biodiversity and are critical for mitigation of climate change. Yet, the drivers of forest dynamics are poorly understood. This is in large part due to the lack of longitudinal data on forest change and changes in drivers. Methodology: We quantify changes in tree abundance, divers...
Article
Full-text available
Deforestation represents one of the greatest threats to tropical forest mammals, and the situation is greatly exacerbated by bushmeat hunting. To construct informed conservation plans, information must be gathered about responses to habitat degradation, regeneration, and hunting over a sufficiently long period to allow demographic responses. We qua...
Preprint
The study of animal movement has gained impetus in recent years with improvements in telemetric technologies which enable high resolution tracking, providing researchers with a wealth of animal "big-data". Coupling such movement data with information about the environments in which the animal moves provides a rich data source that can be exploited...
Preprint
Full-text available
Spatial Social Networks (SSN) build on the node and edge structure used in Social Network Analysis (SNA) by incorporating spatial information. Thus, SSNs include both topological and spatial data. The geographic embedding of the nodes makes it impossible to move the nodes freely, rendering standard topological algorithms (e.g. force layout algorith...
Article
Full-text available
The term ‘smart forest’ is not yet common, but the proliferation of sensors, algorithms, and technocentric thinking in conservation, as in most other aspects of our lives, suggests we are at the brink of this evolution. While there has been some critical discussion about the value of using smart technology in conservation, a holistic discussion abo...
Article
Full-text available
Evidence suggests that a decline in people’s exposure to nature corresponds to decreasing support for nature—a phenomenon we call extinction of nature experience. Here, we evaluate three current trends in conservation research and consider if they contribute to a decrease in exposure to nature. We suggest that while using sensors, algorithms, techn...
Conference Paper
Full-text available
Spatial Social Networks (SSN) build on the node and edge structure used in Social Network Analysis (SNA) by incorporating spatial information. Thus, SSNs include both topological and spatial information. The geographic embedding of the nodes makes it impossible to move the nodes freely, rendering common topological algorithms (e.g. force layout alg...
Preprint
Displaying near-real-time traffic information is a useful feature of digital navigation maps. However, most commercial providers rely on privacy-compromising measures such as deriving location information from cellphones to estimate traffic. The lack of an open-source traffic estimation method using open data platforms is a bottleneck for building...
Preprint
Full-text available
In this work, we propose an AI-based technique using freely available satellite images like Landsat and Sentinel to create natural features over OSM in congruence with human editors acting as initiators and validators. The method is based on Interactive Machine Learning technique where human inputs are coupled with the machine to solve complex prob...
Conference Paper
Displaying near-real time traffic state information is an useful features of digital navigation maps. However, most commercial providers rely on privacy compromising measures such as deriving location information from cellphones to estimate traffic. The lack of an open source traffic estimation method using open data platforms is a bottleneck for b...
Article
Full-text available
Certain features of both extant and fossil anthropoid primates have been interpreted as adaptations to ripe fruit foraging and feeding particularly spatulate incisors and trichro-matic color vision. Here, we approach the question of anthropoid fruit foraging adaptations in light of the sensory and mechanical properties of anthropoid-consumed fruits...
Article
Erosion and progradation are natural dynamics that take place across mangrove landscapes, but anthropogenic pressure may disturb these dynamics and cause increased erosion. The increased erosion of mangrove coastlines leads to mangrove degradation and loss of ecosystem services. However, to map the extent of erosion and progradation in dynamic land...
Article
Full-text available
With 60% of all primate species now threatened with extinction and many species only persisting in small populations in forest fragments, conservation action is urgently needed. But what type of action? Here we argue that restoration of primate habitat will be an essential component of strategies aimed at conserving primates and preventing the exti...
Article
Full-text available
Interpersonal relationships are an important part of social and personal health. Studies of social capital show that individuals and communities with stronger ties are have an economic and health advantage. Yet, loneliness and isolation are becoming major public health issues. There is a pressing need to measure where relationships are strong and h...
Article
Full-text available
OpenStreetMap (OSM), the largest Volunteered Geographic Information project in the world, is characterized both by its map as well as the active community of the millions of mappers who produce it. The discourse about participation in the OSM community largely focuses on the motivations for why members contribute map data and the resulting data qua...
Article
Full-text available
Conservation plans have evolved beyond biodiversity protection to include the welfare of the communities surrounding protected areas. Local community engagement initiatives include development of ecotourism, revenue-sharing arrangements, and resource access agreements. Although research stations are common in African national parks, their contribut...
Article
Social Network Analysis offers powerful tools to analyze the structure of relationships between a set of people. However, the addition of spatial information poses new challenges, as nodes are embedded simultaneously in network space and Euclidean space. While nearby nodes may not form social ties, ties may exist at a distance, a configuration ill-...
Article
Tropical landscapes are changing rapidly as a result of human modifications; however, despite increasing deforestation, human population growth, and the need for more agricultural land, deforestation rates have exceeded the rate at which land is converted to cropland or pasture. For deforested lands to have conservation value requires an understand...
Conference Paper
There has been a proliferation of literature that incorporates social network analysis (SNA) to study geographic phenomena. We argue that these incorporations have mostly been superficial. What is needed is a stronger interrogation of the challenges and possibilities of a tight coupling of spatial and social network concepts, which take advantage o...
Article
Dwindling animal habitat and burgeoning human settlements have made managing human-animal conflict a critical problem in conservation of protected areas, particularly in the biodiversity-rich tropics. In this paper, we present a system aimed at leveraging public participation from affected communities to help effectively manage the conflict in both...
Article
Full-text available
Substantial research has shown that while some parasite infections can be fatal to hosts, most infections are sub-clinical and non-lethal. Such sub-clinical infections can nonetheless have negative consequences for the long-term fitness of the host such as reducing juvenile growth and the host’s ability to compete for food and mates. With such effe...
Chapter
Full-text available
Tropical deforestation is occurring at a rapid rate and while many studies focus on primate adaptations to forest fragment, few studies investigate the impacts of highly degraded areas, where primates cohabit with humans. Here, we investigate how vervet monkeys (Chlorocebus pygerythrus) survive and prosper in an extensively modified humanized lands...
Article
When individuals of a species utilize an environment, they generate movement patterns at a variety of spatial and temporal scales. Field observations coupled with location technologies (e.g. GPS tags) enable the capture of detailed spatio-temporal data regarding these movement patterns. These patterns contain information about species-specific pref...
Article
Full-text available
We present a case-study on teaching an undergraduate level course on Software Engineering (second year and fifth semester of bachelors program in Computer Science) at a State University (New Delhi, India) using a novel teaching instruction model. Our approach has four main elements: inverted or flipped classroom, studio-based learning, real-client...

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Projects (2)
Project
Understanding how social and spatial processes are inter-twinned through simultaneously modelling spatial embeddedness and structure of interactions among a set of entities.