Confirmation of soil‐feeding termites (Isoptera; Termitidae; Termitinae) in Australia using stable isotope ratios
Confirmation of soil‐feeding termites (Isoptera; Termitidae; Termitinae) in Australia using stable isotope ratios
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使用稳定同位素比确认澳大利亚的食土白蚁（等翅目；白蚁科；白蚁亚科）
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
T. Abe
中科院分区：
文献类型：
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作者：
I. Tayasu;Tetsushi Inoue;L. Miller;A. Sugimoto;S. Takeichi;T. Abe
1. 在澳大利亚北部达尔文检查了白蚁（等翅目）的碳（δ13C）和氮（δ15N）稳定同位素比率。研究表明，稳定同位素技术与系统发育学相结合，是了解碎屑动物功能群进化的有用工具。
2. 在白蚁亚科和白蚁属的白蚁亚科和白蚁属中观察到较高的 δ15N 值，这两个不同的分类群在澳大利亚从以木材为食进化为以土壤为食。在八个Termes-Capritermes分支物种中，只有两个物种（Xylochomitermes melvillensis和Ephelotermes melachoma）可被识别为木材/土壤界面取食者，其余六种分析为土壤取食者，其饮食偏好是通过工蚁的δ15N来确定的。
3. 澳大利亚的Termes-Capritermes群同时包含木材/土壤界面饲养者和土壤饲养者，而喀麦隆的木材/土壤界面饲养者来自Termes-Capritermes分支，而土壤饲养者来自Cubitermes群。结果证实，以土壤为食的形式在澳大利亚和非洲都有进化，但来自不同的系统发育群体。
1. Carbon (δ13C) and nitrogen (δ15N) stable isotope ratios of termites (Isoptera) were examined in Darwin, northern Australia. It is suggested that the stable isotope technique, together with phylogenetics, is a useful tool to understand the evolution of functional groups in detritivores.
2. A high δ15N value was observed in the Termes-Capritermes branch of the subfamily Termitinae and the genus Amitermes, two distinct taxonomic groups that evolved from wood-feeding to soil-feeding in Australia. Among eight Termes-Capritermes branch species, only two species (Xylochomitermes melvillensis and Ephelotermes melachoma) were discernible as wood/soil interface feeders, the remaining six species analysed were soil-feeders, where the diet preference was identified by using δ15N of workers.
3. The Termes-Capritermes group in Australia contains both wood/soil interface feeders and soil-feeders, whereas wood/soil interface feeders in Cameroon are from the Termes-Capritermes branch while soil-feeders are from Cubitermes group. The result confirmed that soil-feeding forms evolved both in Australia and Africa, but from different phylogenetic groups.