Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Surtsey' has mentioned 'Species' in the following places:
Occurrence Sentence Text Source
During the island's first 20xc2xa0years, 20xc2xa0species of plants were observed at one time or another, but only 10 became established in the nutrient-poor sandy soil.
As birds began nesting on the island, soil conditions improved, and more vascular plant species were able to survive.
By 2008, 69xc2xa0species of plant had been found on Surtsey,[20] of which about 30 had become established.
This compares to the approximately 490 species found on mainland Iceland.
[20] More species continue to arrive, at a typical rate of roughly 2xe2x80x935xc2xa0new species per year.
[23] Birds first began nesting on Surtsey three years after the eruptions ended, with fulmar and guillemot the first species to set up home.
Twelve species are now regularly found on the island.
[24] The gull colony has been particularly important in developing the plant life on Surtsey,[23][24] and the gulls have had much more of an impact on plant colonisation than other breeding species due to their abundance.
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.
[26][27] Species that have been seen briefly on the island include whooper swans, various species of geese, and common ravens.
[28] In 2008, the 14th breeding bird species was detected with the discovery of a common raven's nest.
On the submarine portion of the island, many marine species are found.
The establishment of insect life provided some food for birds, and birds in turn helped many species to become established on the island.