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For several decades now, amphibian species worldwide have been in decline. A significant proportion of the decline seems to be due to the spread of the chytrid fungus, Batrachochytrium dendrobatidis (Bd) . Chytrid sporangia reside within the epidermal cells of infected animals, animals that consequently show areas of sloughed skin. They can also be lethargic, which is expressed through failure to hide and failure to flee. The infection cycle typically takes four to five days, at the end of which zoospores are released from sporangia into the environment. In some amphibian species, mortality rates approach 100%; other species seem able to survive the infection.
Apart from direct amphibian-to-amphibian contact, what is the most likely means by which the zoospores spread from one free-living amphibian to another?
Producer
An organism, typically a plant or algae, that synthesizes organic compounds from simple substances like carbon dioxide, serving as a fundamental part of the food chain by providing energy for consumers.
Nitrogen
A chemical element with symbol N and atomic number 7, essential for all living organisms.
Denitrification
Conversion of nitrates or nitrites to nitrogen gas.
Nitrogen Fixation
The process by which certain microorganisms convert atmospheric nitrogen into a form that can be used by plants to synthesize proteins and nucleic acids.
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