Correction: Introduced bullfrogs are associated with increased Batrachochytrium dendrobatidis prevalence and reduced occurrence of Korean treefrogs

Borzée, Amaël; Kosch, Tiffany A.; Kim, Mi‐Yeon; Jang, Yikweon

doi:10.1371/journal.pone.0190551

Cited by 7 publications

(7 citation statements)

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“…Korean amphibians have known to be naturally infected by amphibian-specific emerging disease, including the chytrid fungus Batrachochytrium dendrobatidis (i.e., Batrachochytrid; Yang et al, 2009;Bataille et al, 2013;Borzée et al, 2017;O'Hanlon et al, 2018) and Ranaviruses (Suk et al, 2009;Kwon et al, 2017;Park et al, 2017). Emerging diseases are linked to the current extinction crisis affecting amphibians, and management measures are required to stem all risks (Stuart et al, 2004;Beebee and Griffiths, 2005;Blaustein et al, 2011;Bishop et al, 2012;Wake, 2012;Pimm et al, 2014;Scheele et al, 2019).…”

Section: Emerging Diseasesmentioning

confidence: 99%

“…Deadly strands of emerging pathogens such as Batrachochytrid are of foreign origin (Suk et al, 2009;Bataille et al, 2013) and Korean amphibian species are likely to be resistant to strands originally present on the peninsula (O'Hanlon et al, 2018). However, amphibian species of foreign origin have been shown to be agents spreading pathogens (Borzée et al, 2017), potentially facilitating recombination and resulting in more virulent lineages (Farrer et al, 2011). Additionally, it has been shown that imported amphibians as pets or zoo animals increase the risk of Chytrid fungus in wild Korean populations (Kim et al, 2017).…”

Section: Emerging Diseasesmentioning

confidence: 99%

“…In the Republic of Korea, the invasive L. catesbeianus was found to be responsible for altering the ecological landscape (Ko et al, 1991;Shim et al, 2005;Heo et al, 2014;NIE, 2014;Groffen et al, 2019;Kang et al, 2019), and its presence is linked to the extirpation of Hylid populations (Borzée et al, 2020). The presence of the species is also linked to an increase in fungal load on local species (Borzée et al, 2017). However, L. catesbeianus is not the only non-native amphibian species found in the wild in the country, and species such as Duttaphrynus melanostictus 1 , Osteopilus septentrionalis, Xenopus laevis, and Rana spp.…”

Section: Introduction Invasive Speciesmentioning

confidence: 99%

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Policy Recommendation on the Restriction on Amphibian Trade Toward the Republic of Korea

Borzée

Kwon

Koo

et al. 2020

Front. Environ. Sci.

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Amphibian diseases and invasive amphibian species are both generally introduced through the wildlife trade, either for human consumption or for the pet trade. However, adequate regulations can prevent such introductions. In the Republic of Korea, the establishment of invasive Lithobates catesbeianus populations resulted in the alteration of native species' ecology and in an increase in Batrachochytrid load on local species. While not exemplified yet, the same risk arises from all species in the trade, some of which are already found in the wild despite the potential threats to the ecosystems. While regulations exist for the trade of wildlife in general, they are not directly addressing the amphibian trade, especially newly traded species. Thus, we recommend a restriction on the trade of amphibians in Korea.Keywords: amphibian, pet trade, invasive species, emerging diseases, threat, Korea ACTIONABLE RECOMMENDATIONS 1. Regulation of amphibian trade entering the Republic of Korea (food-and pet-trade), 2. Implementation of a stricter control of amphibian species already in the trade, 3. Establishment of quarantine and testing for all amphibians entering the country.

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Section: Emerging Diseasesmentioning

confidence: 99%

Section: Emerging Diseasesmentioning

confidence: 99%

Section: Introduction Invasive Speciesmentioning

confidence: 99%

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Policy Recommendation on the Restriction on Amphibian Trade Toward the Republic of Korea

Borzée

Kwon

Koo

et al. 2020

Front. Environ. Sci.

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“…In many cases, the introduced species die out naturally, but once they settle successfully, it is difficult to remove them by artificial methods. The non-native species that are introduced to the wild not only cause competition [6], predation [7], and hybrid formations [8] with the endemic species but also problems over the wider area such as parasites or the inter-mediation of diseases [9,10]. Moreover, the socio-economic damages required to control the invasion of non-native species are damages that humans directly suffer from [11,12].…”

Section: Introductionmentioning

confidence: 99%

“…The American Bullfrog in South Korea has food sources such as endemic species, birds, frogs, insects, and small mammals including endemic and endangered turtles such as Mauremys reevesii [18][19][20]. In addition, previous studies have shown that the decrease in the seriously endangered Suwon treefrogs (H. suweonensis) may be linked to diseases mediated by L. catesbeianus [10]. Therefore, the spread of L. catesbeianus has resulted in an additional problem of ecological disturbances in South Korea, and it has the possibility to continue in the future.…”

Section: Introductionmentioning

confidence: 99%

Distribution Change of Invasive American Bullfrogs (Lithobates catesbeianus) by Future Climate Threaten Endangered Suweon Treefrog (Hyla suweonensis) in South Korea

Koo

Choe

2021

Animals

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The American Bullfrog (Lithobates catesbeianus) has been imported into South Korea in earnest for food since the 1970s and introduced into nature due to release and escape. Accordingly, the influx and spread of American Bullfrogs are expected to have a direct impact on native species, but few related studies have been conducted on this. We predicted changes in the potential distribution and future distribution based on climate change scenarios to analyze how those changes affect critically endangered Suwon treefrogs. Suwon treefrog sites (63.9%, 78/122) overlapped with the distribution of Bullfrogs. According to the prediction of the future distribution of Bullfrogs, the overlapping of American Bullfrogs and Suwon treefrog will remain similar to the current level in the Representative Concentration Pathway (RCP) 4.5 scenario. On the other hand, in the RCP 8.5 scenario, the number of overlapping sites will increase to 72.1% (88/122) due to the spreading of the American Bullfrogs. The results show that climate change directly affects the distribution expansion of the American Bullfrogs but also indirectly can lead to an increased threat to Suwon treefrogs. In conclusion, our results strongly suggest why climate change should be actively addressed in terms of the spread of invasive species and the protection of endangered species.

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Disentangling the Impacts of Speciation, Sympatry and the Island Effect on the Morphology of Seven Hynobius sp. Salamanders

Borzée

Min

2021

Animals

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Closely related individuals from different areas can see their morphologies change based on differences between clades, but also ecological variables such as the island effect or sympatry. This is the case of salamanders, which have adapted to a broad range of ecological niches, ranging from underground dwellers in xeric landscape to tropical arboreal habitats. On the Korean Peninsula, salamanders from the Hynobius clade are widespread on the mainland and islands, with several partially sympatric clades and candidate species. Currently, seven lineages have been identified based on mtDNA, four of them matching named species and three others for which the species status remains untested. While the morphology of Korean Hynobius is known to be variable between genetically segregated clades, we hypothesise that (1) the candidate species are morphologically different, and that (2) the island effect and (3) the sympatric status have significant impacts on the morphology of individuals within the genus. Here we measured 329 Hynobius salamanders from all seven clades, in areas of sympatry and allopatry, and on islands and on the mainland (Graphical Abstract A). We determined that the island effect had a significant impact on the morphology of the genus, with mainland individuals generally displaying a broader range of morphology than islandic individuals (Graphical Abstract B). We also determined that sympatry had an impact on morphology, with the sizes of individuals from clades in sympatric areas diverging from each other (Graphical Abstract C). Finally, we demonstrated that all seven clades have significantly different morphologies, and we described the three candidate species that had already been isolated based on mtDNA and microsatellite data: Hynobius notialis sp. nov., Hynobius geojeensis sp. nov. and Hynobius perplicatus sp. nov. We conclude that looking at morphology alone would be misleading about the true diversity of Hynobius species, and species in general, because of the island and patry effects.

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Correction: Introduced bullfrogs are associated with increased Batrachochytrium dendrobatidis prevalence and reduced occurrence of Korean treefrogs

Cited by 7 publications

References 1 publication

Policy Recommendation on the Restriction on Amphibian Trade Toward the Republic of Korea

Policy Recommendation on the Restriction on Amphibian Trade Toward the Republic of Korea

Distribution Change of Invasive American Bullfrogs (Lithobates catesbeianus) by Future Climate Threaten Endangered Suweon Treefrog (Hyla suweonensis) in South Korea

Disentangling the Impacts of Speciation, Sympatry and the Island Effect on the Morphology of Seven Hynobius sp. Salamanders

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