两种哈德罗沙类恐龙之间的不同养机制支持了资源分割的可能性
Thomas W Dudgeon1,2, David C Evans1,2
1Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario, Canada.
Proceedings. Biological sciences
|September 30, 2025
概括
恐龙公园形成的龙,Corythosaurus casuarius和Gryposaurus notabilis,尽管骨机制不同,但显示出相似的咬伤力. 资源分区很可能是以大小为媒介,更大的Gryposaurus处理更强硬的植物.
科学领域:
- 古生物学的古生物学
- 生物力学 生物力学
- 功能性形态学 功能性形态学
背景情况:
- 恐龙公园形成区 (DPF) 拥有各种各样的大型草食恐龙群.
- 草食动物的高密度引发了关于共存和资源分割的问题.
- 由于它们的丰富性,多样性和复杂的养系统,hadrosaurids在DPF具有生态意义.
研究的目的:
- 为了评估恐龙头骨和下巴的机械性能.
- 为了测试Corythosaurus casuarius和Gryposaurus notabilis之间的资源分区.
- 了解不同的养系统是如何影响恐龙共存的.
主要方法:
- 恐龙头骨的3D肌肉重建.
- 头骨和下机制的有限元素分析 (FEA).
- 两种同时代的哈德罗索里德物种的比较分析.
主要成果:
- 格里普索瓦鲁斯·诺塔比利斯 (Gryposaurus notabilis) 拥有比科里索瓦鲁斯·卡苏亚鲁斯 (Corythosaurus casuarius) 更大的添加肌肉.
- 科里索索鲁斯 (Corythosaurus casuarius) 显示出更高的机械效率和对曲的头骨抵抗力.
- 在大小相似的个体中发现了类似的咬力,在C. casuarius中有明显的压力分布,可能与它的顶部有关.
结论:
- 这些hadrosaurids之间的资源分割很可能是以大小为媒介.
- 较大的Gryposaurus个体可以处理比较小的Corythosaurus更坚固的植被.
- 头骨形态和肌肉结构影响了草食恐龙的利基差异化.
相关概念视频
00:48Optimal Foraging
13.6K
How animals obtain and eat their food is called foraging behavior. Foraging can include searching for plants and hunting for prey and depends on the species and environment.
13.6K
02:02Ecological Niches
26.0K
All organisms have a position within an ecosystem. The complete set of living and nonliving factors—including food resources, climate, and terrain—that define the position of a given organism are collectively referred to as the organism’s ecological niche.
26.0K
02:34Competition
24.3K
When organisms require the same limited resources within an environment, they may have to compete for them. Competition is a net-negative interaction. Even if two competing individuals or populations do not interact directly, the overall fitness of both competitors is lowered as a result of not having full access to the limited resource.
24.3K
02:39Predator-Prey Interactions
21.0K
Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.
21.0K
00:51Energy Budgets
10.6K
Organisms must balance energy intake with the energy required for growth, maintenance and reproduction. These trade-offs result in a variety of survivorship and reproductive strategies, including semelparity and iteroparity. Semelparous species, like annual plants, have only one reproductive episode in their lifetimes and consequently have short lifespans. Iteroparous species, by contrast, have many reproductive events during their lifetimes but have relatively few offspring. These two...
10.6K
02:31Habitat Fragmentation
21.1K
Habitat fragmentation describes the division of a more extensive, continuous habitat into smaller, discontinuous areas. Human activities such as land conversion, as well as slower geological processes leading to changes in the physical environment, are the two leading causes of habitat fragmentation. The fragmentation process typically follows the same steps: perforation, dissection, fragmentation, shrinkage, and attrition.
21.1K