The influence of juvenile dinosaurs on community structure and diversity

doi:10.1126/science.abd9220

GSTDTAP > 气候变化

DOI	10.1126/science.abd9220
	The influence of juvenile dinosaurs on community structure and diversity
	Katlin Schroeder; S. Kathleen Lyons; Felisa A. Smith
	2021-02-26
发表期刊	Science
出版年	2021
英文摘要	Modern carnivore communities include species that span a range of body sizes. For example, on the African savannah, there are small species (mongooses), medium species (wild dogs), and large species (lions). This variation reflects available prey sources that best suit each group. Carnivorous dinosaur communities, however, were missing species that fall into the middle, or mesocarnivore, group as adults. Schroeder et al. looked across communities, space, and time and found that this absence appears to have been driven by the distinctive biology of dinosaurs, in which giant adults start out as tiny hatchlings. Growing juvenile dinosaurs thus filled the other niches and limited trophic species diversity. Science , this issue p. [941][1] Despite dominating biodiversity in the Mesozoic, dinosaurs were not speciose. Oviparity constrained even gigantic dinosaurs to less than 15 kg at birth; growth through multiple morphologies led to the consumption of different resources at each stage. Such disparity between neonates and adults could have influenced the structure and diversity of dinosaur communities. Here, we quantified this effect for 43 communities across 136 million years and seven continents. We found that megatheropods (more than 1000 kg) such as tyrannosaurs had specific effects on dinosaur community structure. Although herbivores spanned the body size range, communities with megatheropods lacked carnivores weighing 100 to 1000 kg. We demonstrate that juvenile megatheropods likely filled the mesocarnivore niche, resulting in reduced overall taxonomic diversity. The consistency of this pattern suggests that ontogenetic niche shift was an important factor in generating dinosaur community structure and diversity. [1]: /lookup/doi/10.1126/science.abd9220
领域	气候变化 ; 资源环境
URL	查看原文
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/315943
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Katlin Schroeder,S. Kathleen Lyons,Felisa A. Smith. The influence of juvenile dinosaurs on community structure and diversity[J]. Science,2021.
APA	Katlin Schroeder,S. Kathleen Lyons,&Felisa A. Smith.(2021).The influence of juvenile dinosaurs on community structure and diversity.Science.
MLA	Katlin Schroeder,et al."The influence of juvenile dinosaurs on community structure and diversity".Science (2021).