Easter Island, together with its closest neighbour, the tiny island of Isla Salas y Gómez farther east, is recognized by ecologists as a distinct ecoregion, the Rapa Nui subtropical broadleaf forests. The original subtropical moist broadleaf forests are now gone, but paleobotanical studies of fossil pollen, tree moulds left by lava flows, and root casts found in local soils indicate that the island was formerly forested, with a range of trees, shrubs, ferns, and grasses. A large extinct palm, "Paschalococos disperta", related to the Chilean wine palm "(Jubaea chilensis)", was one of the dominant trees as attested by fossil evidence. Like its Chilean counterpart it probably took close to 100 years to reach adult height. The Polynesian rat, which the original settlers brought with them, played a very important role in the disappearance of the Rapa Nui palm. Although some may believe that rats played a major role in the degradation of the forest, less than 10% of palm nuts show teeth marks from rats. The remains of palm stumps in different places indicate that humans caused the trees to fall because in large areas, the stumps were cut efficiently. In 2018, a New York Times article announced that Easter Island is eroding.