Why is it in the news?
- The Indian Institute of Science (IISc) in Bengaluru conducted a study focusing on understanding the consequences of logging and climate change on montane birds.
About the Study
- The study was carried out in the Eaglenest Wildlife Sanctuary in Arunachal Pradesh, known for its diverse bird species and rich biodiversity.
- Researchers collected data over a period of 10 years from the Eaglenest Wildlife Sanctuary, utilizing mist netting and bird ringing techniques.
- The study examined the effects of both forest logging and climate change on bird communities, with a specific focus on the understorey bird community, which comprises birds beneath the main canopy of a forest.
Key Findings of the Study
- Identified forest loss and climate change as major threats to the tropical montane forest ecosystem, particularly in mountainous regions.
- Observed shifts in elevational distribution of many bird species, attributed to rising temperatures.
- Logging was found to result in the loss of large-bodied, old, growth-dependent bird species, leading to an overall decrease in biodiversity.
- Significantly detrimental effects on understorey insectivores, a group of birds confined to specific niches within the ecosystem.
- Logged forests experienced reduced densities of foliage-dwelling insects, which are a crucial food source for birds. This reduction in available resources negatively impacted bird communities.
- Noted a phenomenon where many bird species shifted to higher elevations in response to climate change, seeking more favourable conditions.
- Emphasized the critical importance of preserving primary (undisturbed) forests to mitigate the adverse impacts of climate change on bird communities.
|Eagle Nest Wildlife Sanctuary
· Situated in Arunachal Pradesh.
· Part of the Eastern Himalayas biodiversity hotspot.
· Adjacent to Sessa Orchid Sanctuary and Pakhui Tiger Reserve.
· Recognized as a top global birding destination.
· Characterized by dense bamboo strands and patches of broadleaved evergreen forest, covering a large altitudinal range.
· Home to diverse amphibians, snakes, lizards, and mammal species, including endangered species like the Bugun Liocichla bird.
· Records over 160 species of butterflies.
· The sanctuary is inhabited by two tribes, Bugun and Sherdukpen, adding to its cultural significance.