Tree Hitched a Ride to Island. Marris, E. 510(7505):320–321.
Tree Hitched a Ride to Island [link]Paper  doi  abstract   bibtex   
Acacia analysis reveals globetrotting seed trekked 18,000 kilometres from Hawaii to Réunion. [excerpt] In what is probably the farthest single dispersal event ever recorded, researchers have shown using genetic analysis that an acacia tree endemic to Réunion Island in the Indian Ocean is directly descended from a common Hawaiian tree known as the koa. In fact, these two trees on small specks of land on opposite sides of the globe turn out to be the same species. The event is remarkable not just for the sheer distance covered – some 18,000 kilometres, almost the farthest apart that any two points on land can be – but that it occurred between two small islands. Koa seeds are unlikely to have floated to Réunion – they will not germinate after being soaked in seawater, and the trees grow in the mountains, not near the shore. [...] In the past, similar species found on different land masses were presumed to be the result of the continents slowly drifting apart [...] But the newly discovered long-distance events are changing that opinion, and bio­geographers are increasingly stressing the role of improbable events and serendipity in shaping which species occur where. [...] despite the potentially large role of long-distance dispersals in organizing global flora and fauna, such dispersals are not completely random or unpredictable. [...] In other words, the distribution of some species may be the result of chance, time and luck – but there are still patterns. And science still has a part to play in elucidating them.
@article{marrisTreeHitchedRide2014,
  title = {Tree Hitched a Ride to Island},
  author = {Marris, Emma},
  date = {2014-06},
  journaltitle = {Nature},
  volume = {510},
  pages = {320--321},
  issn = {0028-0836},
  doi = {10.1038/510320a},
  url = {https://doi.org/10.1038/510320a},
  abstract = {Acacia analysis reveals globetrotting seed trekked 18,000 kilometres from Hawaii to Réunion. [excerpt] In what is probably the farthest single dispersal event ever recorded, researchers have shown using genetic analysis that an acacia tree endemic to Réunion Island in the Indian Ocean is directly descended from a common Hawaiian tree known as the koa. In fact, these two trees on small specks of land on opposite sides of the globe turn out to be the same species. The event is remarkable not just for the sheer distance covered -- some 18,000 kilometres, almost the farthest apart that any two points on land can be -- but that it occurred between two small islands. Koa seeds are unlikely to have floated to Réunion -- they will not germinate after being soaked in seawater, and the trees grow in the mountains, not near the shore. [...] In the past, similar species found on different land masses were presumed to be the result of the continents slowly drifting apart [...] But the newly discovered long-distance events are changing that opinion, and bio­geographers are increasingly stressing the role of improbable events and serendipity in shaping which species occur where. [...] despite the potentially large role of long-distance dispersals in organizing global flora and fauna, such dispersals are not completely random or unpredictable. [...] In other words, the distribution of some species may be the result of chance, time and luck -- but there are still patterns. And science still has a part to play in elucidating them.},
  keywords = {*imported-from-citeulike-INRMM,~INRMM-MiD:c-13233281,cross-disciplinary-perspective,local-over-complication,long-distance-dispersal,non-linearity,off-site-effects,serendipity,species-dispersal},
  number = {7505}
}

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