Little consensus exists on the role of food partitioning in the organization of tadpole assemblages. We studied trophic ecology of syntopic tadpoles through the analysis of gut contents, selectivity, and stable isotopes to assess the occurrence of food partitioning in tadpole assemblages. Tadpoles ( n = 194) were collected in three wetlands and corresponded to four species: Elachistocleis bicolor (Eb), Scinax nasicus (Sn), Physalaemus albonotatus (Pa), and Dendropsophus sp. (D); and belonged to four ecomorphological groups (EMGs): suspension feeders (Eb), nektonic (Sn), benthic (Pa) and macrophagous (D). Sn , and Pa showed low selective diet and a wider trophic spectrum than Eb and D , which mainly consumed one or two food categories. Diet overlap was higher between Sn and Pa . Still, Sn and Pa presented some differences in the food resources consumed. Stable isotopes analysis showed that Eb , Sn , and Pa had a lower trophic position than D , explained by the high contribution of animal food oligochaete in D diet, in contrast to the importance of algae in the diet of Eb , Sn , and Pa. Diet specialization of some species, combined with the low dietary and isotopic overlap among the ecomorphological groups, suggests that trophic partitioning facilitates coexistence of syntopic tadpoles.

中文翻译：

---

泛滥平原湿地蝌蚪的营养生态学：结合肠道内容物、选择性和稳定同位素研究同种物种的取食分离

关于食物分配在蝌蚪组合组织中的作用几乎没有共识。我们通过分析肠道内容物、选择性和稳定同位素来研究同位蝌蚪的营养生态学，以评估蝌蚪组合中食物分配的发生。蝌蚪 (n = 194) 在三个湿地收集并对应于四种物种：Elachistocleis bicolor (Eb)、Scinax nasicus (Sn)、Physalaemus albonotatus (Pa) 和 Dendropsophus sp。(四); 并且属于四个生态形态组（EMG）：悬浮饲养者（Eb），游动（Sn），底栖（Pa）和巨噬性（D）。Sn 和 Pa 表现出低选择性饮食和比 Eb 和 D 更广泛的营养谱，主要消耗一种或两种食物类别。Sn 和 Pa 之间的饮食重叠更高。仍然，Sn 和 Pa 在消耗的食物资源方面存在一些差异。稳定同位素分析表明，Eb、Sn 和 Pa 的营养位置低于 D，这是由于动物性食物寡毛纲在 D 饮食中的高贡献，与藻类在 Eb、Sn 和 Pa 饮食中的重要性相反。某些物种的饮食专业化，加上生态形态群体之间的低饮食和同位素重叠，表明营养分配促进了同位蝌蚪的共存。