Pleistocene to Recent Environments and Species Distributions on the California Coast

更新世到加州海岸的近期环境和物种分布

• 批准号: 1740214
• 负责人: Seth Finnegan
• 金额: $ 29.04万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-09-01 至 2023-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1740214&HistoricalAwards=false
• 关键词: Pleistocene; Recent; Environments; Species; Distributions

This project will take advantage of the exceptional fossil record of coastal California to examine the distributions of living mollusk species over the past ~125,000 years and, using geochemical analysis of their shells, reconstruct the environmental conditions where these species lived. This approach will make it possible to determine if the ancient distributions of species are consistent with their modern environmental ranges (implying stability) or if some species once lived outside their present-day environmental ranges (implying evolution). This work will contribute to an understanding of the stability of species' ranges in the face of environmental change, and will provide new data on how the environments and species compositions of economically important coastal ecosystems have varied through time.The primary goal of the proposed work is to determine whether the thermal niches of northeastern Pacific coastal mollusk species have evolved since the Late Pleistocene, and to test the performance of ecological niche models in hindcasting Late Pleistocene distributions. Reliable paleoenvironmental data are essential to this task, and a large number of stable isotope profiles and clumped isotope measurements for fossil and modern shells of the common gastropod Callianax biplicata will be generated to reconstruct environmental conditions along the California coast. At each of approximately 20 localities, isotope profiles from recent individuals will be compared with profiles from individuals that lived in the same area during different stages of the last interglacial complex and subsequent highstands (Marine Isotope Stages 5 and 3). Reconstructed temperature and salinity ranges and other paleoenvironmental data will be used to determine whether the mollusk species occurring at each fossil site were occupying environmental conditions similar to those of the geographic regions they now occupy. This work will result in an improved understanding of the determinants of species distributions in space and time, a more detailed reconstruction of California coastal environments during the last interglacial complex, and improved forecasting models for projecting species distributions in an economically critical ecosystem.

该项目将利用加州沿海的特殊化石记录，研究过去约125,000年来现存软体动物物种的分布，并利用对其外壳的地球化学分析，重建这些物种生活的环境条件。这种方法将有可能确定物种的古代分布是否与它们的现代环境范围一致(意味着稳定)，或者一些物种是否曾经生活在它们今天的环境范围之外(意味着进化)。这项工作将有助于理解面对环境变化时物种范围的稳定性，并将提供关于具有重要经济意义的沿海生态系统的环境和物种组成随时间变化的新数据。拟议工作的主要目标是确定东北太平洋沿海软体动物物种的热生态位自晚更新世以来是否发生了演化，并检验生态位模型在晚更新世分布中的表现。可靠的古环境数据对这项任务至关重要，将生成大量稳定的同位素剖面和常见腹足动物Callianax biplicata的化石和现代贝壳的聚集同位素测量，以重建加州海岸的环境条件。在大约20个地点中的每个地点，将把最近个体的同位素图谱与上一次间冰期复合体和随后的高峰期(海洋同位素阶段5和3)不同阶段生活在同一地区的个体的图谱进行比较。重建的温度和盐度范围以及其他古环境数据将被用来确定每个化石地点出现的软体动物物种所处的环境条件是否与它们现在所处的地理区域相似。这项工作将有助于更好地理解物种在空间和时间上分布的决定因素，更详细地重建最后一次间冰期复合体期间的加州沿海环境，并改进预测经济关键生态系统中物种分布的预测模型。

项目成果

Controls on range shifts of coastal Californian bivalves during the peak of the last interglacial and baseline predictions for today

上次间冰期高峰期间加利福尼亚沿海双壳类动物范围变化的控制和今天的基线预测

• DOI: 10.1017/pab.2020.43
• 发表时间: 2021
• 期刊: Paleobiology
• 影响因子: 2.7
• 作者: Orzechowski, Emily A.;Finnegan, Seth
• 通讯作者: Finnegan, Seth

Compilation of a database of Holocene nearshore marine mollusk shell geochemistry from the California Current System

加州洋流系统全新世近岸海洋软体动物壳地球化学数据库汇编

• DOI: 10.5194/essd-14-1695-2022
• 发表时间: 2022
• 期刊: Earth System Science Data
• 影响因子: 11.4
• 作者: Palmer, Hannah M.;Padilla Vriesman, Veronica;Banker, Roxanne M.;Bean, Jessica R.
• 通讯作者: Bean, Jessica R.

Isotopes from fossil coronulid barnacle shells record evidence of migration in multiple Pleistocene whale populations

冠藤壶壳化石中的同位素记录了多个更新世鲸鱼种群迁徙的证据

• DOI: 10.1073/pnas.1808759116
• 发表时间: 2019
• 期刊: Proceedings of the National Academy of Sciences
• 作者: Taylor, Larry D.;O’Dea, Aaron;Bralower, Timothy J.;Finnegan, Seth
• 通讯作者: Finnegan, Seth

Using the Fossil Record to Understand Extinction Risk and Inform Marine Conservation in a Changing World

利用化石记录了解灭绝风险并为不断变化的世界中的海洋保护提供信息

• DOI: 10.1146/annurev-marine-021723-095235
• 发表时间: 2024
• 期刊: Annual Review of Marine Science
• 影响因子: 17.3
• 作者: Finnegan, Seth;Harnik, Paul G.;Lockwood, Rowan;Lotze, Heike K.;McClenachan, Loren;Kahanamoku, Sara S.
• 通讯作者: Kahanamoku, Sara S.

A database of Holocene nearshore marine mollusc shell geochemistry from the Northeast Pacific

东北太平洋全新世近岸海洋软体动物壳地球化学数据库

• DOI: 10.1594/pangaea.932671
• 发表时间: 2021
• 期刊: PANGAEA - Data Publisher for Earth & Environmental Science
• 作者: Palmer, Hannah M;Padilla Vriesman, Veronica;Banker, Roxanne M;Bean, Jessica R
• 通讯作者: Bean, Jessica R