RUI: From Greenhouse to Icehouse: Documenting evolutionary trends in freshwater siliceous organisms over 80 million years of environmental change

RUI：从温室到冰库：记录 8000 万年环境变化中淡水硅质生物的进化趋势

基本信息

批准号：
1940070
负责人：
Peter Siver
金额：
$ 28.66万
依托单位：
Connecticut College
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2020
资助国家：
美国
起止时间：
2020-09-15 至 2024-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1940070&HistoricalAwards=false
关键词：
RUI Greenhouse Icehouse Documenting evolutionary

项目摘要

Over geologic time, shifts in global temperatures from warm to cold and vice versa have influenced the evolution and extinction of species, and caused large-scale reorganizations of ecosystems worldwide. The latest swing from Greenhouse to the current Icehouse began over 55 million years ago, concurrent with declines in atmospheric carbon dioxide. The objective of this project is to use the fossil record to examine the evolutionary trends of selected freshwater organisms during the shift from Greenhouse to Icehouse conditions. The project will build a foundation for understanding what freshwater ecosystems were like under globally warm conditions, especially in northern latitudes, and how they responded to cooling temperatures. This will provide a framework for understanding ecosystem responses under future climate warming scenarios. The project will advance evolutionary knowledge of the target lineages, uncover new species, examine the oldest localities harboring freshwater diatoms, provide time-specific markers for calibrating components of the Tree of Life to geologic time, and enhance the value of museum specimens. The project will provide undergraduate research internships, and educational opportunities for the general public through presentations at libraries and senior centers.The goal of this project is to expand knowledge of North American freshwater fossil synurophytes, chrysophytes, diatoms, euglyphids, heliozoans and sponges through documentation of species spanning 80 million years from the Late Cretaceous through the Miocene. Microfossils will be documented in several hundred samples from nine localities, and merged with historical information from the literature and museum records to assemble a database to test specific hypotheses on evolutionary history. The suite of fossil localities will yield an abundance of new species that, in turn, will advance an understanding of biodiversity, biogeography, and evolution of morphological traits for all of the organisms over a critical time period spanning the transition from a Greenhouse to Icehouse Earth.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

在地质时期，全球温度从温暖变为冷，反之亦然，影响了物种的演变和灭绝，并引起了全球生态系统的大规模重组。从温室到当前的冰屋的最新摇摆始于5500万年前，同时在大气中的二氧化碳下降。该项目的目的是利用化石记录来检查从温室转移到冰屋条件的转变期间选定的淡水生物的进化趋势。该项目将为了解在全球温暖的条件下，尤其是在北纬度地区以及它们如何反应冷却温度的情况下，为了解淡水生态系统的基础奠定基础。这将提供一个框架，以了解未来气候变暖场景下的生态系统响应。该项目将促进目标谱系的进化知识，发现新物种，检查具有淡水硅藻的最古老的地方，提供特定时间的标记，以校准生命之树的成分到地质时间，并增强博物馆标本的价值。该项目将通过图书馆和高级中心的介绍为公众提供本科研究实习，并为公众提供教育机会。该项目的目的是扩大对北美淡水淡水化石Syrophytes，Chrysophytes，diotoms，diotoms，euglyphids，euglyphids，Heliozoans and Sponges的知识，通过跨越80亿年级的物种，通过遍布薄薄的物种，该物种跨越了8000亿年，微化石将记录在来自九个地区的几百个样本中，并与文献和博物馆记录中的历史信息合并，以组装数据库，以测试有关进化历史的特定假设。化石所在地的套件将产生大量的新物种，反过来，将对所有有机体的生物多样性，生物地理学和形态特征的演变进行了解，跨越了从温室到冰室地球的过渡到过渡的整个关键时期，这反映了NSF的法定任务和审查的依据，这表明了这一法定委员会的依据是众多的依据。

项目成果

期刊论文数量（8）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

History of the Giraffe Pipe locality inferred from microfossil remains: a thriving freshwater ecosystem near the Arctic Circle during the warm Eocene

DOI：
10.1017/jpa.2022.101
发表时间：
2023-01-30
期刊：
JOURNAL OF PALEONTOLOGY
影响因子：
1.4
作者：
Siver，Peter A.;Lott，Anne Marie
通讯作者：
Lott，Anne Marie

Morphological evolution of silica scales in the freshwater genus Synura (Stramenopiles)

DOI：
10.1111/jpy.13093
发表时间：
2020-12-17
期刊：
JOURNAL OF PHYCOLOGY
影响因子：
2.9
作者：
Jadrna, Iva;Siver, Peter A.;Skaloud, Pavel
通讯作者：
Skaloud, Pavel

Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic

来自始新世北极的 Eunotia 属（Eunotiaceae，Bacillariophyta）中的三种新硅藻物种的描述

DOI：
10.11646/phytotaxa.567.1.2
发表时间：
2022
期刊：
Phytotaxa
影响因子：
1.1
作者：
SIVER, PETER A.;ODDSUND, ERIK;LOTT, ANNE M.
通讯作者：
LOTT, ANNE M.

A new, Late Cretaceous gonorynchiform fish in the genus †Notogoneus from drill core of crater-lake deposits in a kimberlite maar, Northwest Territories, Canada

加拿大西北地区金伯利岩玛尔火山口湖沉积物钻芯中发现的一种新的白垩纪晚期淋鱼状鱼类 – Notogoneus

DOI：
10.1016/j.cretres.2022.105176
发表时间：
2022
期刊：
Cretaceous Research
影响因子：
2.1
作者：
Grande, Terry C.;Wilson, Mark V.H.;Reyes, Alberto V.;Buryak, Serhiy D.;Wolfe, Alexander P.;Siver, Peter A.
通讯作者：
Siver, Peter A.

The oldest raphe-bearing diatoms: Evidence from the Upper Cretaceous of western and northern Canada

最古老的中缝硅藻：来自加拿大西部和北部上白垩纪的证据