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See the by Ramis Rafay (PhD candidate Fowler-lab), Jane Fowler and colleagues in PNAS.

How do ecosystems change when new organisms arrive? This study offers scientists a new way to answer that question by improving how biological immigration rates are estimated from abundance data generated through ecological surveys or DNA sequencing. Applicable to systems ranging from engineered microbial communities to tropical forests and coral reefs, the new methodology helps to quantify the movement of organisms between interconnected environments. This will help scientists to better understand how dispersal shapes biodiversity across the biosphere.