- Journal Article2015Landscape scale habitat suitability modelling of bats in the Western Ghats of India:Bats like something in their teaBiological Conservation 191: 529-536.Download
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To conserve biodiversity it is imperative that we understand how different species respond to land use change, and determine the scales at which habitat changes affect species' persistence. We used habitat suitability models (HSMs) at spatial scales from 100–4000 m to address these concerns for bats in the Western Ghats of India, a biodiversity hotspot of global importance where the habitat requirements of bats are poorly understood. We used acoustic and capture data to build fine scale HSMs for ten species (Hesperoptenus tickelli, Miniopterus fuliginosus, Miniopterus pusillus, Myotis horsfieldii, Pipistrellus ceylonicus, Megaderma spasma, Hipposideros pomona, Rhinolophus beddomei, Rhinolophus indorouxii and Rhinolophus lepidus) in a tea-dominated landscape. Small (100–500 m) scale habitat variables (e.g. percentage tea plantation cover) and distances to habitat features (e.g. distance to water) were the strongest predictors of bat occurrence, likely due to their high mobility, which enables them to exploit even small or isolated foraging areas. Most species showed a positive response to coffee plantations grown under native shade and to forest fragments, but a negative response to more heavily modified tea plantations. Two species were never recorded in tea plantations. This is the first study of bats in tea planta- tions globally, and the first ecological Old World bat study to combine acoustic and capture data. Our results suggest that although bats respond negatively to tea plantations, tea-dominated landscapes that also contain forest fragments and shade coffee can nevertheless support many bat species.
- Journal Article2015Demographic superiority with increased logging in tropical understorey birdsJournal of Applied Ecology, 52 (5): 1374-1380
- Book2015What's that bird? Common birds of India
Flashcards of birds for children
- Book2015Birds of peninsular India: a pocket guide to 135 familiar birds
- Popular Article2015A day to celebrate the dugong-a story of their conservationAndaman Chronicle, 04, October
- Popular Article2015வானில் பறக்கும் புள்களைத் தேடி. (On my eBirding Big Year)தி ஹிந்து சித்திரை மலர். The Hindu Sithirai Malar. January 2015
- Popular Article2015இயற்கையை அழித்து வளர்ச்சியா? (Tamil version of‘The long road to growth’by T. R. Shankar Raman.)தி இந்து நாளிதழ், சிந்தனைக் களம், சிறப்புக் கட்டுரை. The Hindu Tamil Op-Ed. 18th April 2015.
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).
- Popular Article2015மழையில் நனைந்த மணிப்புறா. (On Spotted Dove)இல்லம் இணைய இதழ். Illam Online monthly Magazine. September 2015.
- Popular Article2015Pachyderm ProblemsSaevus September 2015
- 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.
- Report2015NCF Annual Report 2015
- 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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- Newsletter2015BushChat Monsoon 2015 (Print)
- Newsletter2015BushChat Autumn 2015 (Print)
- Dataset2015Status of the mountain ungulate prey of the Endangered snow leopard Panthera uncia in the Tost Local Protected Area, South Gobi, Mongoliahttp://dx.doi.org/10.5061/dryad.v61m2
- Popular Article2015Bats like something in their tea!Ecologic: the NCF Blog
- Popular Article2015The fate of seeds: What have rodents got to do with it?EcoLogic: The NCF Blog
- Popular Article2015Eats shoots and doesn't leave: Dugong herbivory and movement patterns in the seagrasses of the Andaman and Nicobar IslandsEcoLogic: The NCF Blog