Explanation:

• Uttarakhand is home to the Western Himalayan temperate forests which harbour a large number of endemic bird species. A new study that analysed these natural oak-dominated forests and modified forests has noted that there was a drastic loss of bird species in all modified landscapes.
• Six major land-use types which included natural oak forest, degraded oak forest (lightly used), lopped oak forest (intensively used), pine forest, agricultural cultivation area and sites with buildings were studied.
• The results showed that there was a low diversity of species in monoculture areas and urban sites. 
• It also noticed strong decline in some of the habitat guilds in the areas that experienced land-use change. Habitat guilds are groups of bird species that have common habitat preferences.

Hence only statement 1st is correct.