Abstract
Species’ coexistence depends on species-specific resource utilization in a given habitat. Human disturbances in this context can constrain the realized niche by altering their community dynamics. In this study, we considered Western Himalaya as a case study to test the hypothesis that human disturbances influence mesocarnivore coexistence patterns. We regarded red fox and leopard cat as the focal species and assessed the coexistence patterns in low and high human disturbance areas in three dimensions: spatial, temporal, and dietary habit. We used camera trap detections and mitochondrial DNA-based species identification of fecal samples. We used generalized linear mixed-effect modelling (GLMM), activity overlap, Levin’s niche breadth, and Pianka’s overlap index to capture the spatial, temporal, and dietary interactions respectively. We found that red fox and leopard cat coexisted by spatial segregation in low human disturbance area, whereas dietary segregation was the means of coexistence in high human disturbance area. We observed a broader dietary breadth for red fox and a narrower for leopard cat in high human disturbance area. The altered coexistence pattern due to differential human disturbances indicates intensive anthropogenic activities adjacent to natural forests. It can link to increased opportunities for shared spaces between mesocarnivores and humans, leading to future disease spread and conflicts. Our study contributes to scant ecological knowledge of these mesocarnivores and adds to our understanding of community dynamics in human-altered ecosystems. The study elucidates the need for long-term monitoring of wildlife inhabiting interface areas to ensure human and wildlife coexistence.
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Data availability
The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
We are grateful to the Himachal Pradesh Forest Department officials and staff for being cordial. We thank the Director, Dean and Research Coordinator, Laboratory in-charge, and Nodal Officer, WFCG Cell of Wildlife Institute of India, Dehradun, for their continuous support and encouragement. This study would have been impossible without our field teams’ immense hard work: Pritam Thakur, Padam Thakur, Bintu, Duni, Hemchand, Dilip, Yograj, and Punma Devi. We also thank Rakesh Sundariyal for maintaining the laboratory decorum and for his continued support during the dietary analysis.
Funding
This work was supported by the National Mission on Himalayan Studies (NMHS) program (No: GBPI/NMHS/HF/RA/2015–16/HJRF003) an initiative by the Ministry of Environment, Forest & Climate Change (MoEF&CC). Meghna Bandyopadhyay has received the research support from NMHS to carry out the study.
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Meghna Bandyopadhyay and Ramesh Krishnamurthy conceived the project. Ramesh Krishnamurthy provided overall supervision and resource acquisitions. Meghna Bandyopadhyay conceptualized the study. Meghna Bandyopadhyay and Tryambak Dasgupta conducted the field work. Meghna Bandyopadhyay and Suvankar Biswas performed the DNA-based species identification. Meghna Bandyopadhyay, Suvankar Biswas, and Tryambak Dasgupta performed the morphological prey species identification. Meghna Bandyopadhyay performed the data curation and analysis. Meghna Bandyopadhyay wrote the first draft of the manuscript and all authors read and approved the final manuscript.
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Due to the non-invasive nature (fecal sample–based) of the work, no ethical clearance was required in the study.
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Bandyopadhyay, M., Biswas, S., Dasgupta, T. et al. Patterns of coexistence between two mesocarnivores in presence of anthropogenic disturbances in Western Himalaya. Environ Monit Assess 195, 397 (2023). https://doi.org/10.1007/s10661-023-11003-4
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DOI: https://doi.org/10.1007/s10661-023-11003-4