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Jeganathan, P. (2015). இயற்கையை அழித்து வளர்ச்சியா?- திஇந்துநாளிதழ், சிந்தனைக் களம், சிறப்புக் கட்டுரை. 18thApril 2015. (Tamil version of ‘The long road to growth’ by T. R. Shankar Raman.) Iyarkaiyai azithu valarchiya?The Hindu Tamil Op-Ed. 18th April 2015.
English version by T R Shankar Raman link here).
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- Journal Article2015Seagrass Herbivory Levels Sustain Site-Fidelity in a Remnant Dugong PopulationSeagrass Herbivory Levels Sustain Site- Fidelity in a Remnant Dugong PopulationPLoS ONE 10(10): e0141224. doi:10.1371/journal.pone.0141224Download
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Seagrass Herbivory Levels Sustain Site-Fidelity in a Remnant Dugong Population
Herds of dugong, a largely tropical marine megaherbivore, are known to undertake long-dis- tance movements, sequentially overgrazing seagrass meadows in their path. Given their drastic declines in many regions, it is unclear whether at lower densities, their grazing is less intense, reducing their need to travel between meadows. We studied the effect of the feeding behaviour of a small dugong population in the Andaman and Nicobar archipelago, India to understand how small isolated populations graze seagrasses. In the seven years of our observation, all recorded dugongs travelled either solitarily or in pairs, and their use of seagrasses was limited to 8 meadows, some of which were persistently grazed. These meadows were relatively large, contiguous and dominated by short-lived seagrasses spe- cies. Dugongs consumed approximately 15% of meadow primary production, but there was a large variation (3–40% of total meadow production) in consumption patterns between meadows. The impact of herbivory was relatively high, with shoot densities c. 50% higher inside herbivore exclosures than in areas exposed to repeated grazing. Our results indicate that dugongs in the study area repeatedly graze the same meadows probably because the proportion of primary production consumed reduces shoot density to levels that are still above values that can trigger meadow abandonment. This ability of seagrasses to cope per- haps explains the long-term site fidelity shown by individual dugongs in these meadows. The fact that seagrass meadows in the archipelago are able to support dugong foraging requirements allows us to clearly identify locations where this remnant population persists, and where urgent management efforts can be directed.
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- Popular Article2015When a million turtles landhttps://maptia.com/kalyanvarma/stories/when-a-million-turtles-landDownload
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In a small coastal town in India, every year hundreds of thousands of turtles come en-masse to nest in a small stretch of beach.
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- Popular Article2015Eats shoots and doesn't leave: Dugong herbivory and movement patterns in the seagrasses of the Andaman and Nicobar IslandsEcoLogic: The NCF Blog
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The article explores how in extreme places, such as the Central and South Asian cold-desert, local communities are adapting to climatic challenges.
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Introducing large mammals of Trans-Himalaya and conservation issues.
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PDF, 5.13 MB
Report on tiger numbers in the dry forests in the confluence of Western and Eastern Ghats in southern India