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The term "amphibian" is also sometimes used to refer to a [[seaplane]].
The term "amphibian" is also sometimes used to refer to a [[seaplane]].
== Decline ==
Starting in the 1900s, large declines of amphibian populations were noticed. This was identified to be caused by a pathogenic fungus, ''Batrachochytrium dendrobatidis'' (Bd), after an outbreak in 1998.<ref>Daugherty, M., & Hung, K. (2020, January 19). ''Chytrid fungus''. Center for Invasive Species Research. Retrieved June 1, 2022, from https://cisr.ucr.edu/invasive-species/chytrid-fungus </ref> Bd primarily infects keratinous areas of anurans, namely the mouthparts of tadpoles and the hind limbs of adults.<ref>McMahon, T.A., Rohr, J.R. Transition of Chytrid Fungus Infection from Mouthparts to Hind Limbs During Amphibian Metamorphosis. ''EcoHealth'' ''12'', 188–193 (2015). https://doi.org/10.1007/s10393-014-0989-9</ref> Costa Rica has shown considerable declines, with extinctions of some species, such as the golden toad.<ref>Zumbado-Ulate, H., Nelson, K. N., García-Rodríguez, A., Chaves, G., Arias, E., Bolaños, F., Whitfield, S. M., et al. (2019). Endemic Infection of ''Batrachochytrium dendrobatidis'' in Costa Rica: Implications for Amphibian Conservation at Regional and Species Level. ''Diversity'', ''11''(8), 129. MDPI AG. Retrieved from http://dx.doi.org/10.3390/d11080129</ref>
== References ==
== References ==