Evolution of Gastropod-shell inhabiting organisms, preservational constraints and ecological opportunities

腹足动物壳栖息生物的进化、保护限制和生态机会

• 批准号: 9004519
• 负责人: Sally Walker
• 金额: $ 4.25万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-08-15 至 1991-07-01
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9004519&HistoricalAwards=false
• 关键词: Evolution; Gastropod; shell; inhabiting; organisms

This project investigates the evolutionary patterns of gastropod shell biota from subtropical and tropical Miocene to Recene assemblanges as a function of ecological opportunities and preservational biases created by hermit crabs. PI will study shell bionts associated with a guild of marine hermit crabs, living snails, empty and experimental tethered shells in two habitats (rocky intertidal and sandflat) in Purerto Penasco, Mexico. I will identify guilds of bionts associated with each shell inhabitant and formulate criteria by which these shell occupants (snail or hermit crab), and their prospective habitats, can be recognized in the fossil record. I will then determine, using the fossil record, if these bionts are (1) recurrent as guilds or change through time as a result of hermit crabs providing a novel substrate (the empty gastropod shell), (2) adequate to distingush the evolutionary history of the hermit crab, and (3) indicative of how much the gastropod fossil record has been biased by hermit crabs, thus potentially biasing gastropod paleoecology. Hermit crabs may have caused evolutionary breakthroughs in shell biota and this biota, in turn, may be indicative of the little known fossil history of hermit crabs and their shell use through time. Research will address how ecoligcal interactions may have changed through time.

该项目调查了腹足动物壳生物群从亚热带和热带中新世，再恢复组装，这是寄居蟹造成的生态机会和防腐偏见的函数。 PI将研究与墨西哥Pererto Penasco的两个栖息地（岩石潮间带和沙以上）中的海洋寄居蟹，活蜗牛，空的和实验性的束缚壳相关的贝壳。 我将确定与每个壳居民相关的Biont公会，并制定这些壳乘员（蜗牛或寄居蟹）及其前瞻性栖息地的标准，可以在化石记录中识别出来。 然后，我将使用化石记录来确定这些比昂人是否（1）反复出现作为公会或由于寄生蟹提供新颖的底物（空的胃壳外壳）而随着时间的变化，（2）足以散发出偏见的遗传蟹的进化史以及（3）的范围。腹足动物古生态学。 寄居蟹可能在壳生物群中引起了进化的突破，而这种生物群也可能表明寄居蟹的鲜为人知的化石历史以及随着时间的推移使用外壳。 研究将解决生态相互作用如何随着时间的流逝而改变。