Interspecific interactions between coexisting Siberian and Ezo salamander larvae examined by stable isotope analyses
Interspecific interactions between coexisting Siberian and Ezo salamander larvae examined by stable isotope analyses
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通过稳定同位素分析检查共存的西伯利亚蝾螈幼虫和虾夷蝾螈幼虫之间的种间相互作用
DOI:
10.1007/s10201-022-00709-y
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发表时间:
2023
期刊:
影响因子:
1.6
通讯作者:
Atsushi Maruyama
中科院分区:
文献类型:
--
作者:
Shigeharu Terui ; Tsubasa Furuta ; Yukihiro Kohmatsu ; Atsushi Maruyama
Hokkaido Island is inhabited by two salamander species, Siberian salamander (Salamandrella keyserlingii) and Ezo salamander (Hynobius retardatus), which were previously considered incompatible to cohabit due to the predation and/or competition between them. Both species had never been seen reproducing sympatrically until a recent discovery in a pond where the two species spawn concurrently. We investigated their potential interspecific interaction, by identifying the trophic niche of the coexisting populations in this pond using isotope analysis. We initially conducted aquarium experiments to determine the trophic discrimination factor (TDF) of main-bodyδvalues, which are required to accurately interpret the isotope ratios in the field. The TDF ofδ15Nandδ13Cwere 1.6‰ and 0.1‰ forS. keyserlingiiand 1.5‰ and 0.5‰ forH. retardatus, respectively. Theδ15Nandδ13Cresults from the pond in June suggested the possibility thatH. retardatuslarva may prey onS. keyserlingiilarva, but this prey–predator interaction had subsided by July, if ever. Further, the interspecific variations inδvalues suggested that the two species consumed different foods in July, when both species reached isotopic steady states. Thus, we conclude that the coexisting salamander larvae do not have continuous prey–predator or competitive interaction as expected from their exclusive distribution patterns. The unsustainable negative interspecificity may be avoided due to microhabitat segregation in the pond or by a decrease in theS. keyserlingiipopulation density after predation.
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DOI:
10.5358/hsj1972.7.1_20
发表时间:
1977
期刊:
Japanese journal of herpetology
影响因子:
--
作者:
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通讯作者:
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DOI:
10.1007/978-3-642-56166-5
发表时间:
2012-10
期刊:
--
影响因子:
--
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通讯作者:
Prof. Dr. Ulrich Sommer;Dr. Boris Worm
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10.2108/zsj.20.1467
发表时间:
2003
期刊:
--
影响因子:
--
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影响因子:
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通讯作者:
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影响因子:
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通讯作者:
Maruyama Atsushi