Troubling news: the invasive algae known as Didymo has been found in the Rio Espolon and Rio Futaleufú in Chile. “USGS FORT ecologist Sarah Spaulding confirmed the identification of the diatom Didymosphenia geminata (“Didymo”) as forming extensive blooms in Chilean rivers near Esquel, Argentina. The bloom was reported on Rio Espolon and Rio Futaleufú, for a total of more than …