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Gole, Swapnali
- Detection and Mapping of Seagrass Meadows at Ritchie’s Archipelago using Sentinel 2A Satellite Imagery
Abstract Views :160 |
PDF Views:79
Authors
Sharad Bayyana
1,
Satish Pawar
1,
Swapnali Gole
2,
Sohini Dudhat
2,
Anant Pande
2,
Debashis Mitra
3,
Jeyaraj Antony Johnson
4,
Kuppusamy Sivakumar
2
Affiliations
1 Indian Institute of Remote Sensing, Dehradun 248 001, IN
2 Department of Endangered Species Management, Wildlife Institute of India, Dehradun 248 002, IN
3 Marine and Atmospheric Science Department, Indian Institute of Remote Sensing, Dehradun 248 001, IN
4 Department of Habitat Ecology, Wildlife Institute of India, Dehradun 248 002, IN
1 Indian Institute of Remote Sensing, Dehradun 248 001, IN
2 Department of Endangered Species Management, Wildlife Institute of India, Dehradun 248 002, IN
3 Marine and Atmospheric Science Department, Indian Institute of Remote Sensing, Dehradun 248 001, IN
4 Department of Habitat Ecology, Wildlife Institute of India, Dehradun 248 002, IN
Source
Current Science, Vol 118, No 8 (2020), Pagination: 1275-1282Abstract
This study presents an attempt to utilize seagrass data acquired from field surveys to compare classification models for mapping seagrasses using Sentinel -2A satellite data. Out of three models tested , viz. Random Forest, Support Vector Machine and K-Nearest Neighbor; Random Forest classification model proved most effective in the given scenario with 0.99 model accuracy. Seagrasses present as deep as 21 m were detected post water column correction, presenting the capability of Sentinel-2A satellite in detecting submerged benthic habitat.Keywords
Depth Invariant Index, Ritchie’s Archipelago, Seagrass, Sentinel-2A.Full Text
References
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- Light-Weight Unmanned Aerial Vehicle Surveys Detect Dugongs and Other Globally Threatened Marine Species from the Andaman and Nicobar Islands, India
Abstract Views :278 |
PDF Views:92
Authors
Sagar Rajpurkar
1,
Anant Pande
1,
Sajal Sharma
1,
Swapnali Gole
1,
Sohini Dudhat
1,
J. A. Johnson
1,
K. Sivakumar
1
Affiliations
1 Wildlife Institute of India, Chandrabani, Dehradun 248 001, IN
1 Wildlife Institute of India, Chandrabani, Dehradun 248 001, IN
Source
Current Science, Vol 121, No 2 (2021), Pagination: 195-197Abstract
No Abstract.Keywords
No Keywords.Full Text
References
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- Understanding dietary differences in Indian dugongs through opportunistic gut sampling of stranded individuals
Abstract Views :155 |
PDF Views:78
Authors
Sumit Prajapati
1,
Chinmaya Ghanekar
1,
Sameeha Pathan
1,
Rukmini Shekar
1,
K. Madhu Magesh
1,
Swapnali Gole
1,
Srabani Bose
1,
Sweta Iyer
1,
Anant Pande
2,
Kuppusamy Sivakumar
3,
Jeyaraj Antony Johnson
1
Affiliations
1 Wildlife Institute of India, Chandrabani, Dehradun 248 001, India, IN
2 Wildlife Institute of India, Chandrabani, Dehradun 248 001, India; 2Marine Programme, Wildlife Conservation Society – India, Bengaluru 560 097, India, IN
3 Wildlife Institute of India, Chandrabani, Dehradun 248 001, India; Department of Ecology and Environmental Sciences, School of Life Sciences, Pondicherry University, Puducherry 605 014, India, IN
1 Wildlife Institute of India, Chandrabani, Dehradun 248 001, India, IN
2 Wildlife Institute of India, Chandrabani, Dehradun 248 001, India; 2Marine Programme, Wildlife Conservation Society – India, Bengaluru 560 097, India, IN
3 Wildlife Institute of India, Chandrabani, Dehradun 248 001, India; Department of Ecology and Environmental Sciences, School of Life Sciences, Pondicherry University, Puducherry 605 014, India, IN
Source
Current Science, Vol 123, No 10 (2022), Pagination: 1259-1264Abstract
We analysed gut samples of stranded dugongs from Tamil Nadu and Gujarat, India, to understand their dietary preferences. We quantified seagrass fragments from the gut as leaf, stem and rhizome, and identified leaf fragments up to genera level by their morphological features and epidermal cell characteristics using an inverted microscope. The overall abundance of above-ground fragments (leaf, stem) was higher in all samples, which may suggest the dugongs use a cropping mechanism to forage. The ingested seagrass generic diversity was higher in Tamil Nadu (n = 5) dugong individuals than those in Gujarat (n = 2). A total of five genera were recorded from all samples, viz. Halophila spp., Halodule spp., Cymodocea spp., Enhalus sp. and Syringodium spp. In Tamil Nadu, Cymodocea spp. (46.24%) was the most dominant, followed by Halophila spp. (26.49%), Syringodium spp. (14.83%) and Halodule spp. (12.16%), with a low occurrence of Enhalus spp. (0.19%). In Gujarat, Halodule spp. (61.48%) was the most dominant, followed by Halophila spp. (30.20%). The recorded plastic and wood fragments suggest fine spatial scale threat mapping in dugong habitatsKeywords
Dugongs, foraging pattern, megaherbivore, necropsy, seagrass.Full Text
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