Effects of Shell-Rich Layers on Modern and Ancient Infaunal Animals

富含贝壳的层对现代和古代动物的影响

• 批准号: 8916682
• 负责人: Molly Miller
• 金额: $ 4.63万
• 依托单位: Vanderbilt University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-01-01 至 1992-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8916682&HistoricalAwards=false
• 关键词: Effects; Shell; Rich; Layers; Modern

An unanswered ecological/paleocological question is "What is the relation between shelled animals living in soft-sediment benthic communities and the co-occurring (generally soft-bodied, mobile) infauna, and how this relationship changed through the Phanerozoic?" One possible, but largely untested, mechanism linking shelled and soft-bodied organisms is taphonomic inhibition), in which accumulation of dead hardparts negatively affects living animals. The goals of the project are to determine the impact of shell layers on an infaunal community inhabiting a modern sandflat and to evaluate whether or not shell layers exerted control over Ordovician infaunal animals. The project proposes a reasonable hypothesis for a possible interaction between shelled and soft-bodied animals, one that is testable in both modern and ancient communities. Shell layer inhibition of burrowing may help explain the typically disparate distribution of body and trace fossils, and may have been important in structuring soft-sediment benthic communities throughout the Phanerozoic.

一个悬而未决的生态学/古地理学问题是“生活在软沉积物底栖动物群落中的有壳动物与共生的(通常是软体的、可移动的)动物群之间有什么关系，这种关系是如何通过显生界发生变化的？”一种可能的、但在很大程度上未经测试的将有壳生物和软体生物联系在一起的机制是攻丝抑制)，在这种机制中，死亡硬部分的积累对活着的动物产生了负面影响。该项目的目标是确定贝壳层对居住在现代沙滩上的植物群落的影响，并评估贝壳层是否对奥陶纪的动物群起到了控制作用。该项目对有壳动物和软体动物之间可能存在的相互作用提出了一个合理的假设，这种假设在现代和古代社区都是可以测试的。壳层对洞穴的抑制可能有助于解释身体和遗迹化石典型的不同分布，并可能对整个显生目软质沉积物底栖动物群落的构建起到重要作用。