The Fungal Pathogen Batrachochytrium Dendrobatidis, or Bd, Has Been Strongly

question 176

Essay

The fungal pathogen Batrachochytrium dendrobatidis, or Bd, has been strongly implicated in the decline of amphibians around the world.Researchers are currently debating whether Bd is a novel pathogen, recently introduced into wild populations (the "novel pathogen hypothesis"), or whether it existed before the declines and emerged because of human-caused environmental changes (the "emerging endemic hypothesis").Based on what you know about this disease and its spread, which hypothesis seems more likely? Justify your choice.

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