Niche partitioning, larval recruitment, behavioral patterns and taphonomy of Recent Isocrinidae (Crinoidea): paleo- ecological implications

近代等蛤科（海百合总科）的生态位划分、幼虫招募、行为模式和埋藏学：古生态意义

• 批准号: 9004232
• 负责人: Charles Messing
• 金额: $ 5.12万
• 依托单位: Nova Southeastern 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: 1990-08-15 至 1993-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9004232&HistoricalAwards=false
• 关键词: Niche; partitioning; larval; recruitment; behavioral

Four aspects of the biology of Recent stalked crinoids in the Straits of Florida are examined as they contribute to understanding paleoecological processes: 1) niche partitioning of habitat and food among four species distributed as three sympatric pairs--does it support or refute tiering, hydrodynamic and food partitioning hypotheses proposed for fossil taxa. Measured variables include current velocity, stalk height, crown diameter, filter density, gut contents and available food; 2) larval recruitment contributions to aggregated versus scattered populations; contributions of recruitment and relocation of vagile adults in re-establishing aggregations following physical disturbance; 3) relationship between possible behavioral patterns (feeding, activity or locomotory patterns or cycles) and variations in current regime and 4) skeletal contributions of Recent crinoids to sediment as an analogue for depositional processes in ancient crinoidal sediments--analyses of post-mortem processes and potential preservational biases. Work will be conducted via submersible, time-lapse cinematography, morphological, photographic and sedimentological analyses of collected material. Isocrininds represent major components of macroepibenthic assemblages in the study area and have a fossil record dating to the Triassic. As such, they represent an excellent analogue for paleoecological processes.

对佛罗里达海峡最近有茎海百合的生物学的四个方面进行了研究，因为它们有助于理解古生态过程：1）作为三个同域对分布的四个物种之间生境和食物的生态位划分——它是否支持或反驳为化石分类群提出的分层、水动力和食物分配假设。 测量变量包括水流速度、茎高度、冠直径、过滤器密度、肠道内容物和可用食物； 2) 幼虫招募对聚集种群与分散种群的贡献；招募和重新安置迷走的成虫在身体受到干扰后重建聚集方面的贡献； 3）可能的行为模式（进食、活动或运动模式或周期）与当前状况的变化之间的关系，以及4）现代海百合对沉积物的骨骼贡献，作为古代海百合沉积物沉积过程的模拟——对死后过程和潜在保存偏差的分析。 工作将通过潜水、延时摄影、对收集到的材料进行形态学、摄影和沉积学分析来进行。 等分泌动物代表了研究区域大型底栖生物组合的主要组成部分，并且拥有可追溯到三叠纪的化石记录。 因此，它们是古生态过程的绝佳模拟。