Changes in δ13C stable isotopes in multiple tissues of insect predators fed isotopically distinct prey
Changes in δ13C stable isotopes in multiple tissues of insect predators fed isotopically distinct prey
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DOI：
10.1007/s00442-005-0322-y
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发表时间：
2006-04-01
期刊：
影响因子：
2.7
通讯作者：
Forbes, AE
中科院分区：
文献类型：
--
作者：
Gratton, C;Forbes, AE
传统上，研究人员使用碳稳定同位素的测量来推断消费者的饮食组成。然而，由于消费者的组织可以不同地处理碳同位素，特别是在饮食改变之后，因此可以使用多个组织中的碳同位素的测量来不仅确定个体饮食的组成，而且确定其时间动态。研究了异色瓢虫和七星瓢虫成虫不同组织中碳稳定同位素（C-13/C-12，δ（13）C）的变化规律。在实验室中，我们将瓢虫从C3为基础的饮食（大豆蚜虫，大豆蚜），以C4为基础的（玉米叶蚜，Rhopalosiphum major）。代谢活跃组织如身体脂肪和生殖器官的δ 13 C变化迅速，
Traditionally, researchers have used measurements of carbon stable isotopes to infer the composition of consumers' diets. However, since consumer's tissues may process carbon isotopes differently, particularly following a diet shift, it is possible to use measurements of carbon isotopes in multiple tissues to determine not only the composition of an individual's diet, but also the temporal dynamics thereof. This study examined how stable isotopes of carbon (C-13/C-12, expressed as delta(13)C) changed in different adult tissues of two predacious beetles, Harmonia axyridis and Coccinella septempunctata (Coleoptera: Coccinellidae). In the laboratory, we switched ladybeetles from a C3-based diet (soybean aphids, Aphis glycines) to a C4-based one (corn leaf aphids, Rhopalosiphum maidis). The delta(13)C of metabolically active tissues such as the body fat and reproductive organs changed rapidly (