- Journal Article2016Homeward bound: fish larvae use dispersal corridors when settling on coral reefsNatural History Notes: Frontiers in Ecology and the EnvironmentDownload
PDF, 769 KB
- Popular Article2016The land of travelling falconsThe Hindu in School, 30 November
- Popular Article2016The fall of a squirrelThe Hindu in School, 16 November
- Report2016Hornbill Nest Adoption Program - 2016 breeding seasonHNAP 2016 Report
- Popular Article2016When termites take wingThe Hindu in School, 14 December
- Journal Article2016Abundance estimates of the Rufous-necked hornbill (Aceros nipalensis), and characterisation of a montane subtropical forest in the Indian Eastern Himalaya.Indian Birds, Vol. 12, 4 & 5 14 November 2016
- Popular Article2016An inclusive oil palm policy for people and biodiversityThe Arunachal Times, November 9, 2016
- Popular Article2016Managing man’s best friend in a Trans-Himalayan landscapeFeature in Current Conservation, Issue 10.1
- Journal Article2016Irrigation demands aggravate fishing threats to river dolphins in NepalBiological Conservation, http://dx.doi.org/10.1016/j.biocon.2016.10.026Download
PDF, 1.05 MB
Riverine species are adapted to natural habitat changes caused by seasonal flood-pulses. However, abrupt river channel changes following flooding events intersect with social systems of land and water management (e.g. agriculture, fisheries) and in turn generate significant consequences for conservation of endangered aquatic species. We investigated tradeoffs between changing river habitat availability and exposure to fishing intensity for a small population of Ganges River dolphins Platanista gangetica gangeticain the Karnali basin of Nepal. A major natural flooding event in the Karnali basin in 2010 caused the river channel to shift from the Geruwa (flows through a protected area where fishing is restricted) to the Karnali channel (high fishing activity, agriculture-dominated), where dolphins moved in response. Based on our survey data (2009–2015) and long-term hydrological trends in the basin, we found that irrigation diversions since 2012 had aggravated fishing impacts on dolphins, suggesting that their new habitat had become an ‘ecological trap’. Regression models showed that at low river depths, fishing intensity negatively affected dolphin abundance, but at higher depths no effect of fishing was observed. Two records of dolphin bycatch in gillnets confirmed this, as both events corresponded with periods of sudden increase in water abstraction for irrigation. Overall, dolphin distribution shifted downstream and the population declined from 11 in 2012 to 6 in 2015. Effective protection of this river dolphin population from extinction will require the Government of Nepal to prioritize ecologically adequate river flow regimes for implementing efficient irrigation schemes and adaptive fisheries regulations in the Karnali basin.
- Book2016Birds of Spiti and Ladakh: A pocket guide to 137 birds of high altitudes
- Book2016Birds of Kerala (Malayalam) - pocket guide
- Report2016Awareness and coexistence measures to conserve endangered lion-tailed macaques in the Valparai landscape, Western Ghats.Nature Conservation Foundation, Mysore.
- Popular Article2015A range of faunaFrontline, January 9, 2015 Pages: 67-82Download
PDF, 2.77 MB
An account of a trek in Sathyamangalam Tiger Reserve, Tamil Nadu.
- Popular Article2015Little Green Flesh-eatersThe Hindu in School, 21 January
- Popular Article2015Natural history on the rocksSaevus, January issueDownload
PDF, 5.74 MB
Connecting rock art in the Trans-Himalayan Spiti Valley with natural history.
- Popular Article2015Marine Meadows – Following The Feeding Trail Of The DugongSanctuary Asia, Vol. XXXV No. 1, February 2015.
- Book Chapter2015SciuridsIn: Mammals of South Asia: Volume 2, (eds A. J. T. Johnsingh & N. Manjrekar), pp. 513-573. Universities Press, Hyderabad.
- Journal Article2015Seed dispersal by avian frugivores: non-random heterogeneity at fine scales.Biotropica 47(1): 77-84.Download
PDF, 687 KB
Seed dispersal studies have primarily examined dispersal as a function of distance from the parent tree and/or heterogeneity in dispersal due to animal use of nesting, roosting and sleeping sites. However, non-random heterogeneity in seed dispersal is also likely to result from the post-foraging behavior and movement of frugivores which prefer certain trees. To characterize variation in seed rain at fine scales, we studied the dispersal curve of Prunus ceylanica, a primarily bird-dispersed species. We compared seed rain at conspecifics, heterospecific fruiting trees with similar frugivore assemblages, emergent trees, and the landscape surrounding these trees. Seed rain of P. ceylanica was found to peak globally under the canopy of conspecifics but to peak locally under the canopy and immediate neighborhood of heterospecific fruiting trees. Our results demonstrate that seed rain is highly clumped even at fine spatial scales. A large proportion of seeds are dispersed in specific, localized regions. This variation can have important implications for plant population dynamics and might significantly alter the impact of post-dispersal processes. Seed dispersal models may need to incorporate this heterogeneity to explain manifestations of spatially explicit dynamics like mixed species ‘orchards’.
- Popular Article2015Message in a pollenThe Hindu in School, 1 April
- Popular Article2015Nono: king of the mountainsThe Hindu in School, 18 March