权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Experimental and theoretical investigations of filter feeding mechanisms of recent and fossil crinoids

近代海百合和化石海百合滤食机制的实验和理论研究

基本信息

批准号：
200569518
负责人：
Professor Dr. James H. Nebelsick
金额：
--
依托单位：
Staatliches Museum für Naturkunde Stuttgart - Zentrum für Biodiversitätsforschung
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2011
资助国家：
德国
起止时间：
2010-12-31 至 2013-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/200569518?language=en
关键词：
Experimental theoretical investigations filter feeding

项目摘要

This project is an interdisciplinary study to analyze filter feeding mechanisms in detail. Due to the great diversity, the wide morphological range and the passive suspension feeding strategy of crinoids, representatives of this group are ideal objects for studying the performance of biological filter mechanisms. Extant and extinct forms will be compared using modern computational approaches as well as flume (flow channel) experiments to test theoretical hypothesis and to obtain experimental data. The aim of the study is to: 1) contribute substantially to our knowledge of passive suspension feeding mechanisms, 2) analyze the effect of different filter architectures on flow patterns and filter efficiency, 3) draw conclusions on feeding strategies of crinoids and identify the possible role of filter feeding strategies in the evolution of crinoids, and 4) to obtain biomimetic concepts with respect to efficient particle capturing for different purposes. Applied methods include 1) flume experiments (Particle Image Velocimetry, PIV) on detailed artificial models of fossil Encrinus liliiformis (Middle Triassic) and extant Hyocrinus sp., 2) numerical simulations (FEM) on 3d models of E. liliiformis, Hyocrinus sp. and Neocrinus decorus (also extant), using a commercial program package. The application of computer simulations represents a method that has been recently introduced for analyzing biological filter mechanisms and has hitherto not been applied to crinoid filter feeding. PIV will be applied for analyzing filter feeding for the first time.

该项目是一项跨学科的研究，旨在详细分析过滤器的投料机制。由于海百合的多样性大、形态范围广、采用被动悬浮投料策略，这类生物的代表是研究生物过滤机制性能的理想对象。将使用现代计算方法和水槽(流道)实验对现存和灭绝的形式进行比较，以验证理论假设并获得实验数据。这项研究的目的是：1)对被动悬浮进料机制有很大的帮助，2)分析不同的过滤器结构对流型和过滤效率的影响，3)得出海百合的进料策略的结论，并确定过滤进料策略在海百合进化中的可能作用，以及4)获得关于不同目的的有效颗粒捕获的仿生概念。应用的方法包括：1)对中三叠世百合化石和现存的百合化石进行详细的人工模型的水槽实验(粒子图像测速，PIV)；2)对百合、百合的三维模型进行数值模拟。和Necriinus Decorus(也是现存的)，使用商业程序包。计算机模拟的应用代表了一种最近引入的用于分析生物过滤机制的方法，到目前为止还没有被应用于松果状滤料。首次将PIV应用于滤料分析。