start-ver=1.4
cd-journal=joma
no-vol=16
cd-vols=
no-issue=3
article-no=
start-page=369
end-page=
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2026
dt-pub=20260123
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Impact of the July 2018 Heavy Rain Disaster on the Endangered Nagoya Daruma Pond Frog (Pelophylax porosus brevipodus) in Rice Fields of Mabi Town, Kurashiki City, Western Japan: Changes in Population Structure over Five Years
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Rice paddy fields (referred to below as rice fields) are important not only for food production, but also as habitats for various species. The Nagoya Daruma Pond Frog (Pelophylax porosus brevipodus) is an endangered frog species endemic to Japan, mainly living in and around rice field areas. In July 2018, heavy rainfall caused severe flooding in Mabi Town of Okayama Prefecture, western Japan, submerging numerous rice fields and affecting local frog populations, including P. porosus brevipodus. To clarify whether the population structure of P. porosus brevipodus changed following the flood disaster in the rice fields of Mabi Town, we conducted quantitative field surveys in a rice fallow field in mid-October before (2017) and after (2018, 2020?2022, excluding 2019) the flood. The number of frogs declined sharply after the 2018 flood, reaching only a few individuals by 2020, but showed a substantial recovery in 2021 following the resumption of rice cultivation, although numbers decreased again in 2022. This recovery, despite fluctuations, indicates that habitat restoration through rice farming played a key role in enabling the population to rebound. Our findings underscore the importance of maintaining and restoring rice field environments after natural disasters for the survival and long-term recovery of P. porosus brevipodus.
en-copyright=
kn-copyright=

en-aut-name=NakajimaRyo
en-aut-sei=Nakajima
en-aut-mei=Ryo
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=AzumiDaisuke
en-aut-sei=Azumi
en-aut-mei=Daisuke
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=TadaMasakazu
en-aut-sei=Tada
en-aut-mei=Masakazu
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

en-aut-name=NakaichiJunya
en-aut-sei=Nakaichi
en-aut-mei=Junya
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=

en-aut-name=KatsuharaKoki R.
en-aut-sei=Katsuhara
en-aut-mei=Koki R.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=

en-aut-name=NakataKazuyoshi
en-aut-sei=Nakata
en-aut-mei=Kazuyoshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=

affil-num=1
en-affil=Graduate School of Environmental, Life, Natural Science and Technology, Okayama University
kn-affil=

affil-num=2
en-affil=Graduate School of Environmental, Life, Natural Science and Technology, Okayama University
kn-affil=

affil-num=3
en-affil=Okayama Prefectural Public Interest Incorporated Foundation for Environmental Conservation
kn-affil=

affil-num=4
en-affil=Graduate School of Environmental, Life, Natural Science and Technology, Okayama University
kn-affil=

affil-num=5
en-affil=Graduate School of Environmental, Life, Natural Science and Technology, Okayama University
kn-affil=

affil-num=6
en-affil=Graduate School of Environmental, Life, Natural Science and Technology, Okayama University
kn-affil=
en-keyword=agroecosystem
kn-keyword=agroecosystem
en-keyword=conservation ecology
kn-keyword=conservation ecology
en-keyword=endangered amphibian
kn-keyword=endangered amphibian
en-keyword=paddy field
kn-keyword=paddy field
en-keyword=post-disaster habitat recovery
kn-keyword=post-disaster habitat recovery
END