Answer:
Chytrid
Step-by-step explanation:
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The [chytridiomycosis panzootic] really happened fast and had significant impact in terms of the total number of species affected and it has had a lasting impact,” said Kelly Zamudio, the Goldwin Smith Professor of Ecology and Evolutionary Biology at Cornell, an expert on frogs of the Americas and the frog-killing chytrid fungus, and a co-author of the paper.
Though there is no treatment for chytridiomycosis, the international team of amphibian experts – led by first author Ben Scheele, an ecologist at the Australian National University – advocate for better biosecurity and reductions in wildlife trade to limit its spread.
The infection is primarily caused by Batrachochytrium dendrobatidis (Bd), a fungus discovered in 1998 that originated in Asia, according to genetic analysis. Decades prior to its discovery, the disease peaked globally in the 1980s, with a smaller peak in the early 2000s. Minimal losses from chytridiomycosis were reported in Asia, Africa, Europe and North America. A related pathogen – B. salamandrivorans, discovered in 2013 – has infected salamanders and newts of Europe and threatens diverse Salamander species if it were to arrive in North America.
While 192 species that have declined due to Bd continue to lose numbers, about 60 species have shown modest signs of recovery. However, those recoveries have occurred in isolated populations, rather than on a species level.