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ID 47300
file
title alternative
Leaf litter, a critical habitat for juvenile Japanese giant salamander, Andrias japonicus (Amphibia: Caudata)
creator
Ikeda, Seiji
Goto, Masafumi
Shioji, Tsuneo
Takeuchi, Kazue
subject
フロラ
オオサンショウウオ
落ち葉溜まり
裸子植物
被子植物
APG分類体系
flora
Andrias japonicus
leaf litter
seed-bearing vascular plants
flowering plants
APG system
NDC
Botany
abstract
東広島市椋梨川水系にはオオサンショウウオが生息している。2011 年から,生息状況や産卵,幼生の離散などの生態学的な調査が行われている。この過程で幼生が巣穴から離散した直後の隠れ家や餌となる水生昆虫の生息場所として流水中の落ち葉・落枝が重要な役割を担う可能性が示唆されている。本研究では流水中の落ち葉・落枝の詳細を明らかにするため,河畔林のフロラを調査するとともに,幼生が発見された場所の落ち葉との比較を行った。その結果,流水中の落ち葉・落枝として29種の維管束植物が同定できた。流水中の落ち葉・落枝の大半がコナラやスギなどの木本で,離散後の幼生や餌となる水生昆虫の生息場所として周辺の植生が強い影響を与える可能性が示唆された。
abstract
Japanese giant salamanders Andrias japonicus inhabit the Mukunashi River around Higashi-Hiroshima City in Hiroshima Prefecture, southwestern Japan; researchers and local people have collaborated to investigate the species’ behavior, particularly its oviposition and the movement of larvae after leaving the nest. In this research we focused on leaf litter in the stream as habitat in which salamander larvae and the aquatic insects which are its critical food cohabit. We studied the flora of the riparian forest to identify the species of leaf litter in the stream among which salamander larvae were found. Leaf litter and branches belonging to 29 species of vascular plants were identified, and most leaves were from the deciduous oak Quercus serrata and the conifer Cryptomeria japonica. It is suggested that the surrounding flora has an important influence on the survival of Japanese giant salamander larvae that have left the nest.
journal title
Bulletin of the Hiroshima University Museum
issue
Issue 10
start page
91
end page
102
date of issued
2018-12-25
publisher
広島大学総合博物館
issn
1884-4243
ncid
language
jpn
nii type
Departmental Bulletin Paper
HU type
Departmental Bulletin Papers
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2018 広島大学総合博物館 Hiroshima University Museum
department
Hiroshima University Museum
Graduate School of Science
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