Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Surtsey' has mentioned 'Birds' in the following places:
Occurrence Sentence Text Source
As birds began nesting on the island, soil conditions improved, and more vascular plant species were able to survive.
Birds use the plants for nesting material, but also continue to assist in the spreading of seeds, and fertilize the soil with their guano.
[23] Birds first began nesting on Surtsey three years after the eruptions ended, with fulmar and guillemot the first species to set up home.
As well as providing a home for some species of birds, Surtsey has also been used as a stopping-off point for migrating birds, particularly those en route between Europe and Iceland.
The establishment of insect life provided some food for birds, and birds in turn helped many species to become established on the island.
The bodies of dead birds provide sustenance for carnivorous insects, while the fertilisation of the soil and resulting promotion of plant life provides a viable habitat for herbivorous insects.