Climate Change Data Portal
| DOI | 10.1016/j.palaeo.2018.03.006 |
| The trophic habits of early birds | |
| O'Connor J.K. | |
| 发表日期 | 2019 |
| ISSN | 0031-0182 |
| 起始页码 | 178 |
| 结束页码 | 195 |
| 卷号 | 513 |
| 英文摘要 | Although direct associations that reveal diet are extremely rare in the fossil record, the rich Lower Cretaceous Jehol Lagerstätte has produced dozens of specimens preserving ingested items, which together reveal important information regarding the early evolution of the avian alimentary canal. Direct evidence indicates Jeholornis and Sapeornis ate seeds and like living granivores utilized a gastric mill although only the more derived Sapeornis possessed a crop for food storage. Despite their smaller numbers in the Early Cretaceous, most direct evidence pertains to the Ornithuromorpha, indicating a structurally and functionally modern alimentary canal was present in even the earliest members of this clade. Similar evidence is altogether lacking in the Enantiornithes suggesting this clade was characterized by a primitive alimentary canal, potentially factoring into the ultimate extinction of this successful Cretaceous lineage. The role of the gizzard in the loss of teeth in Aves is more complex than in non-avian theropod lineages. As in neornithines, the presence of gastroliths in basal ornithuromorphs may not be entirely indicative of herbivory although this diet does appear to correlate with complete tooth loss in this clade. Positive selection for specialized tooth morphologies persists throughout the evolution of Aves and in the Ornithuromorpha appears to be linked to piscivory. Although represented by the greatest numbers, no direct indicator of diet preference is preserved in any confuciusornithiform or enantiornithine suggesting these clades utilized different nutritional strategies. The absence of teeth and gastroliths in all confuciusornithiforms suggest this lineage may have secondarily switched to a non-herbivorous, soft diet. Similarly, the absence of gizzard stones in enantiornithines also suggests a soft diet while their small body size suggests Early Cretaceous species would have fed on invertebrates. The diversity of recognized dental patterns including enamel specializations observed in Jehol enantiornithines suggests effective resource partitioning of available invertebrate faunas and that teeth had an active participation in enantiornithine feeding strategies. © 2018 Elsevier B.V. |
| 英文关键词 | Alimentary canal; Aves; Gastroliths; Mesozoic; Stomach contents; Teeth |
| 语种 | 英语 |
| scopus关键词 | bird; body size; canalization (biology); cladistics; Cretaceous; evolution; extinction; fossil record; granivory; herbivory; invertebrate; Mesozoic; niche partitioning; stomach content; tooth; trophic environment; type specimen; Aves; Confuciusornithiformes; Invertebrata; Theropoda |
| 来源期刊 | Palaeogeography, Palaeoclimatology, Palaeoecology
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/151207 |
| 作者单位 | Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, 10010, China; CAS Center for Excellence in Life and Paleoenvironment, Beijing, 10010, China |
| 推荐引用方式 GB/T 7714 | O'Connor J.K.. The trophic habits of early birds[J],2019,513. |
| APA | O'Connor J.K..(2019).The trophic habits of early birds.Palaeogeography, Palaeoclimatology, Palaeoecology,513. |
| MLA | O'Connor J.K.."The trophic habits of early birds".Palaeogeography, Palaeoclimatology, Palaeoecology 513(2019). |
| 条目包含的文件 | 条目无相关文件。 | |||||
| 个性服务 |
| 推荐该条目 |
| 保存到收藏夹 |
| 导出为Endnote文件 |
| 谷歌学术 |
| 谷歌学术中相似的文章 |
| [O'Connor J.K.]的文章 |
| 百度学术 |
| 百度学术中相似的文章 |
| [O'Connor J.K.]的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| [O'Connor J.K.]的文章 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
