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Srinivasan, Umesh
- Size–Logging Interactions and Population Dynamics in Tropical Understorey Birds
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Authors
Affiliations
1 National Centre for Biological Sciences, GKVK Campus, Bengaluru 560 065, IN
2 Nature Conservation Foundation, Mysuru 570 002, IN
1 National Centre for Biological Sciences, GKVK Campus, Bengaluru 560 065, IN
2 Nature Conservation Foundation, Mysuru 570 002, IN
Source
Current Science, Vol 116, No 5 (2019), Pagination: 795-801Abstract
Demographic vital rates (e.g., fecundity and survival) determine population size and viability. However, how anthropogenic habitat change differentially influences these dynamic population processes for species with different traits remains unknown. Crucially, this limits a mechanistic understanding of species- and community- level patterns in response to intensity of habitat change, and therefore, impedes robust prediction of future species responses. We investigated how size (across 26 forest birds, spanning almost an order of magnitude in body mass) and habitat modification (logging intensity, from intact forest to a 2.5-fold reduction in tree density) might interact to influence survival, reproduction and dispersal. Data were collected over five sessions under the robust design in a capture-mark-recapture framework and analysed using reverse time capture–recapture models. We found that smaller species were more fecund with increased logging intensity, and dispersed from more heavily logged to more intact forest. With increasing size, species reproduced better in progressively more intact forest, and dispersed from intact forest into more logged forest. These results indicate important trait-linked differences in the relative significance of various demographic processes in influencing species responses to varying intensities of habitat change. Separating the mechanistic processes underlying observed patterns is crucial to understanding and predicting anthropogenic impacts on biodiversity.Keywords
Apparent Survival, Eastern Himalaya, Fecundity, Natal Dispersal, Reverse Time Mark-Recapture, Understorey Insectivores.Full Text
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- A Socio-Economic Survey of the Singchung Bugun Village Community Reserve, Arunachal Pradesh, India
Abstract Views :263 |
PDF Views:77
Authors
Affiliations
1 Wildlife Conservation Society – India Program and National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bengaluru 560 065, IN
2 Earth Institute Fellow, and Department of Ecology, Evolution and Environmental Biology, Columbia Univers ity, New York 10027, US
3 Woodrow Wilson School of Public and International Affairs, Princeton University, New Jersey 08544, US
1 Wildlife Conservation Society – India Program and National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bengaluru 560 065, IN
2 Earth Institute Fellow, and Department of Ecology, Evolution and Environmental Biology, Columbia Univers ity, New York 10027, US
3 Woodrow Wilson School of Public and International Affairs, Princeton University, New Jersey 08544, US
Source
Current Science, Vol 118, No 9 (2020), Pagination: 1415-1419Abstract
Community-managed lands often lack vital baseline information that assesses both natural resource dependence, as well as perceptions of power, involvement and support in management. We interviewed 171 house-holds from 16 villages in the buffer of the Sin gchung Bugun Village Community Reserve (SBVCR) in Arunachal Pradesh, India. In total, 68% stated that SBVCR would be beneficial to wildlife and in terms of ecosystem services, and 45% expressed support for its formation. However, 76% identified multiple threats to the Reserve, including forest fires, h unting and agricultural expansion. Different parts of the Reserve were identified as being important for resource extraction, non-extractive uses and the need to be di sturbance-free (with varying overlaps across these areas), thus calling for adaptive management.Keywords
Adaptive Management, Biodiversity Hot-Spot, Conservation Measures, Community Reserve.Full Text
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