- Journal Article2014Seagrasses in the age of sea turtle conservation and shark overfishingFrontiers in Marine Science 1:28. doi: 10.3389/fmars. 2014.00028.Download
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Efforts to conserve globally declining herbivorous green sea turtles have resulted in promising growth of some populations. These trends could significantly impact critical ecosystem services provided by seagrass meadows on which turtles feed. Expanding turtle populations could improve seagrass ecosystem health by removing seagrass biomass and preventing of the formation of sediment anoxia. However, overfishing of large sharks, the primary green turtle predators, could facilitate turtle populations growing beyond historical sizes and trigger detrimental ecosystem impacts mirroring those on land when top predators were extirpated. Experimental data from multiple ocean basins suggest that increasing turtle populations can negatively impact seagrasses, including triggering virtual ecosystem collapse. Impacts of large turtle populations on seagrasses are reduced in the presence of intact shark populations. Healthy populations of sharks and turtles, therefore, are likely vital to restoring or maintaining seagrass ecosystem structure, function, and their value in supporting fisheries and as a carbon sink.
- Popular Article2014Nitya in the rainforestThe Hindu in School, 16 July
- Popular Article2014From hunters to protectorsThe Hindu in School, 23 July
- Popular Article2014For the love of honeydewThe Hindu in School, 19 June
- Poster2014Introduction to the Western Ghatssupported by Critical Ecosystem Partnership FundDownload
PDF, 14.9 MB
Endemics, Malabar Grey Hornbill, Vertebrates, Intervertebrates, Deciduous Forests, Tropical Rainforests, Shola Grasslands
- Journal Article2014Roads emerging as a critical threat to leopards in India?Cat News 60 Spring 2014 (30)Download
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Leopards (Panthera pardus) face severe threat from poaching, loss of habitat and killing in retaliation to conflict. However, in India a new threat appears to be emerging in the form of vehicle accident mortalities. In the past 60 months 23 leopards have been recorded as killed due to road accidents in the southern Indian state of Karnataka alone. When roads overlap with important wildlife habitats, considerable scrutiny and critical conservation planning is urgently required
- Popular Article2014களக்காடு தந்த பரிசுகள். (On sighting various life forms in Kalakad Mundanthurai Tiger Reserve)தி இந்து நாளிதழ். The Hindu Tamil News Daily. 30th September 2014.
Jeganathan, P. (2014).களக்காடு தந்த பரிசுகள் - தி இந்து நாளிதழ் உயிர்மூச்சு இணைப்பில், ‘இயற்கையின் வாசலில்’ தொடர் எண் – 13. 30th September 2014. Kalakkadu Thantha Parisugal– Iyarkayin Vaasalil ArticleSeries No.13 (On sighting various life forms in Kalakad Mundanthurai Tiger Reserve). The Hindu Tamil News Daily. 30th September 2014.
- Popular Article2014கோடியக்கரை: விருந்தாளிப் பறவைகளின் உல்லாச விடுதி. (On Point Calimere Wildlife Sanctuary)தி இந்து நாளிதழ். The Hindu Tamil News Daily. 22th July 2014.
Jeganathan, P. (2014). கோடியக்கரை: விருந்தாளிப் பறவைகளின் உல்லாச விடுதி - தி இந்து நாளிதழ் உயிர்மூச்சு இணைப்பில், ‘இயற்கையின்வாசலில்’தொடர் எண் – 3. 22th July 2014. Kodiyakkarai: Virunthalip paravaigalin ullasa viduthi – Iyarkayin Vaasalil ArticleSeries No.3 (On Point Calimere Wildlife Sanctuary). The Hindu Tamil News Daily. 22th July 2014.
- Popular Article2014Meat momos for everyone!The Hindu in School, 13 August
- Journal Article2014Photographic records of the Ratel Mellivora capensis from the southern Indian state of KarnatakaSmall Carnivore Conservation, 50, 42-44.
Understanding about the occurrence and distribution of the Ratel Mellivora capensis from the Indian subcontinent is hindered by the animal’s elusive nature. The first photographic evidence of Ratel for the southern Indian state of Karnataka comprises 41 camera-trap records from Cauvery Wildlife Sanctuary. During January–March 2014, Ratels were detected in the sanctuary’s different forest types broadly in proportion to camera-trapping effort therein. A wider occupancy survey, using a range of methods including camera-trapping, would help obtain a better understanding of the distribution of this cryptic species in Karnataka and neighbouring regions.
- Journal Article2014Occurrence of Small-toothed Palm Civet Arctogalidia trivirgata in Dampa Tiger Reserve, Mizoram, North-east IndiaSmall Carnivore Conservation 50: 47-49.Download
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Single Small-toothed Palm Civets Arctogalidia trivirgata were seen and photographed on two consecutive nights in March 2014 in Dampa Tiger Reserve, Mizoram, India. They visited a fruiting tree used also by Masked Palm Civet Paguma larvata and Common Palm Civet Paradoxurus hermaphroditus. The present note describes the observation, adding to the few recent records of A. trivirgata from North-east India. The sighting was close to the location of a 1995 sighting of Stripe-backed Weasel Mustela strigidorsa, another species rarely recorded in the region. We suggest further targeted spotlighting and camera-trap surveys for better documentation of the occurrence and distribution of small carnivores in Dampa.
- Art & Literary2014The wild heart of IndiaFountain Ink, March 2014, 3(5): 103-110.
Available here: http://fountainink.in/?p=5045&all=1
- Journal Article2014A case of colour aberration in Stripe-necked Mongoose Herpestes vitticollis in the Western Ghats, IndiaSmall Carnivore Conservation 50: 76-77.
- Poster2014In The RainforestDownload
PDF, 5.55 MB
Black Eagle, Scarlet Minivet, Indian Giant Squirrel, Great Hornbill, White-bellied Woodpecker, Pompadour Pigeon, White-bellied Blue Flycatcher, Butterfly, Lion-tailed Macaque, Bettle, Southern Green Calotes, Termites, King Cobra, Frog, Damselflies, Fungi, Malabar Whistling Thrush, Mouse Deer, Leopard Cat, Leaf-nosed Bat, Malabar Spiny Doormouse, Brown Palm Civet, Large Brown Flying Squirrel, Fruit Bat, Spot-bellied Eagle Owl
- Journal Article2014Accounting for false positives improves estimates of occupancy from key informant interviewsDiversity and Distributions 20: 223-235Download
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Much research in conservation biogeography is fundamentally dependent on obtaining reliable data on species distributions across space and time. Such data are now increasingly being generated using various types of public surveys. These data are often integrated with occupancy models to evaluate distributional patterns, range dynamics and conservation status of multiple species at broad spatio-temporal scales. Occupancy models have traditionally corrected for imperfect detection due to false negatives while implicitly assuming that false positives do not occur. However, public survey data are also prone to false-positive errors, which when unaccounted for can cause bias in occupancy estimates. We test whether false positives in a dataset collected from public surveys lead to overestimation of species site occupancy and whether estimators that simultaneously account for false-positive and false-negative errors improve occupancy estimates.
Western Ghats, India.
We fit occupancy models that simultaneously account for false positives and negatives to data collected from a large-scale key informant interview survey for 30 species of large vertebrates. We tested their performance against standard occupancy models that account only for false negatives.
Standard occupancy models that correct only for false negatives tended to overestimate species occupancy due to false-positive errors. Occupancy models that simultaneously accounted for false positives and negatives had greater support [lower Akaike's information criterion (AIC)] and, consistent with predictions, generated systematically lower occupancy estimates than standard models. Furthermore, accounting for false positives improved the accuracy of occupancy estimates despite the added complexity to the statistical estimator.
Integrating large-scale public surveys with occupancy modelling approaches is a powerful tool for informing conservation and management. However, in many if not most cases, it will be important to explicitly account for false positives to ensure the reliability of occupancy estimates obtained from public survey datasets such as key informant interviews, volunteer surveys, citizen science programmes, historical archives and acoustic surveys.
PDF, 6.79 MB
White-cheeked Barbet, Coppersmith Barbet, Green Plumage, Stout Beaks
- Art & Literary2014Coming home to BorneoFountain Ink, June 2014, 3(8): 91-102.
- Report2014NCF Annual Report 2013 & 2014
- Journal Article2014Genetic diversity and population structure of Lantana camara in India indicates multiple introductions and gene flow.Plant Biology. 16(3): 651-658.Download
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Lantana camara is a highly invasive plant, which has spread over 60 countries and island groups of Asia, Africa and Australia. In India, it was introduced in the early nineteenth century, since when it has expanded and gradually established itself in almost every available ecosystem. We investigated the genetic diversity and population structure of this plant in India in order to understand its introduction, subsequent range expansion and gene flow. A total of 179 individuals were sequenced at three chloroplast loci and 218 individuals were genotyped for six nuclear microsatellites. Both chloroplasts (nine haplotypes) and microsatellites (83 alleles) showed high genetic diversity. Besides, each type of marker confirmed the presence of private polymorphism. We uncovered low to medium population structure in both markers, and found a faint signal of isolation by distance with microsatellites. Bayesian clustering analyses revealed multiple divergent genetic clusters. Taken together, these findings (i.e. high genetic diversity with private alleles and multiple genetic clusters) suggest that Lantana was introduced multiple times and gradually underwent spatial expansion with recurrent gene flow.
- Poster2014Amphibians of the Western Ghatssupported by Critical Ecosystem Partnership FundDownload
PDF, 308 MB
Western Ghats, Caecilians, Ichthyophis Bombayensis, Gegeneophis Seshachari, Nyctibatrachiade, Ranixalide, Microhylidae, Melanobatrachus indicus, Nasikabatrachidae, Nasikabatrachus Sahyadrensis, Bufonide, Dicroglossidae, Rhacophoridae, Micrixalidae, Ranidae, Nctibatrachus, Micrixalus, Indirana, Pseudophilatus