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Collaborative Research: Testing for local adaptation and responses to multiple stressors in populations of eastern oysters inhabiting a natural salinity gradient

合作研究：测试居住在自然盐度梯度的东部牡蛎种群对多种压力源的局部适应和反应

基本信息

批准号：
1737170
负责人：
Morgan Kelly
金额：
$ 49.11万
依托单位：
Louisiana State University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2018
资助国家：
美国
起止时间：
2018-01-01 至 2021-12-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1737170&HistoricalAwards=false
关键词：
Collaborative Research Testing local adaptation

项目摘要

The project focuses on understanding how oysters from different regions in the Gulf of Mexico (GOM) will be affected by ongoing changes to salinity and temperature caused by a warming climate, altered rainfall patterns, and changes in land use in this region. The oyster fishery in the GOM provides more than half of the national total, and these oyster reefs provide water filtration, shoreline stability, and critical habitat for other species. By investigating how present-day oyster populations respond to changes in temperature and salinity, this research will provide valuable information to ecologists, conservation biologists, state managers, and small-scale farmers as they plan for the effects of future changes in the environment. By identifying populations of oysters that are the most resilient to environmental changes, this research will identify potential source populations that may be used in future restoration efforts aimed at declining populations. Additionally this project will integrate research and education through a semester-long immersive research experience. Three undergraduates, two graduate students, and a postdoctoral scholar will be mentored. Public outreach will be conducted through development of middle school lesson plans, public lectures, and dissemination of results to managers.This research will test whether eastern oysters (Crassotrea virginica) in the Gulf of Mexico are locally adapted to salinity, and whether combined changes in salinity and temperature will have synergistic effects on oyster physiology and ecology. Both temperature and salinity are expected to change rapidly in the Gulf of Mexico over the coming century, due to effects of climate change, altered rainfall patterns, and changes to coastal hydrology. Oysters are a critical habitat-forming species in this region, and while they inhabit a wide range of salinities, preliminary data indicate substantial differences in salinity tolerances among populations. This research will integrate genomic and physiological tools with controlled rearing experiments to (1) quantify genomic variation among populations of C. virginica, (2) test for local adaptation, and (3) measure physiological rates and gene expression as a function of temperature and salinity. The investigators will then use these data to build estuary-specific dynamic energy budget models, linking salinity and temperature to population growth. This project will provide critical support to ongoing restoration efforts, identifying adaptive variation among populations targeted for supportive breeding programs and informing management decisions in the face of ongoing ocean warming and changes to coastal hydrology.

该项目的重点是了解墨西哥湾不同地区的牡蛎将如何受到气候变暖、降雨模式变化和该地区土地利用变化导致的盐度和温度持续变化的影响。GOM的牡蛎渔业提供了全国总量的一半以上，这些牡蛎礁为其他物种提供了水过滤、海岸线稳定和关键的栖息地。通过调查当今牡蛎种群对温度和盐度变化的反应，这项研究将为生态学家、保护生物学家、国家管理人员和小规模农民提供有价值的信息，以便他们计划未来环境变化的影响。通过确定对环境变化最具适应能力的牡蛎种群，这项研究将确定潜在的来源种群，这些种群可能用于未来针对种群减少的恢复工作。此外，该项目将通过长达一学期的沉浸式研究体验将研究和教育结合起来。将指导三名本科生、两名研究生和一名博士后学者。这项研究将测试墨西哥湾的东部牡蛎(Crassotrea Virgiica)是否适应当地的盐度，以及盐度和温度的综合变化是否会对牡蛎的生理和生态产生协同影响。由于气候变化、降雨模式改变和沿海水文变化的影响，预计未来一个世纪墨西哥湾的温度和盐度都将迅速变化。牡蛎是该区域重要的栖息地形成物种，虽然它们栖息在广泛的盐度范围内，但初步数据表明，不同种群对盐度的耐受性存在很大差异。这项研究将把基因组和生理工具与受控饲养实验相结合，以(1)量化不同种群间的基因组变异，(2)测试局部适应性，(3)测量生理速率和基因表达随温度和盐度的变化。然后，研究人员将使用这些数据来建立特定于河口的动态能源收支模型，将盐度和温度与人口增长联系起来。该项目将为正在进行的恢复工作提供关键支持，确定目标种群之间的适应性变异，以支持繁殖计划，并在面临持续的海洋变暖和沿海水文变化的情况下为管理决策提供信息。

项目成果

期刊论文数量（11）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Characterizing the Epigenetic and Transcriptomic Responses to Perkinsus marinus Infection in the Eastern Oyster Crassostrea virginica

DOI：
10.3389/fmars.2020.00598
发表时间：
2020-08-11
期刊：
FRONTIERS IN MARINE SCIENCE
影响因子：
3.7
作者：
Johnson, Kevin M.;Sirovy, K. A.;Kelly, Morgan W.
通讯作者：
Kelly, Morgan W.

Population epigenetic divergence exceeds genetic divergence in the Eastern oyster Crassostrea virginica in the Northern Gulf of Mexico

DOI：
10.1111/eva.12912
发表时间：
2020-01-07
期刊：
EVOLUTIONARY APPLICATIONS
影响因子：
4.1
作者：
Johnson, Kevin M.;Kelly, Morgan W.
通讯作者：
Kelly, Morgan W.

Differential DNA methylation across environments has no effect on gene expression in the eastern oyster

DOI：
10.1111/1365-2656.13645
发表时间：
2021-12-21
期刊：
JOURNAL OF ANIMAL ECOLOGY
影响因子：
4.8
作者：
Johnson, Kevin M.;Sirovy, Kyle A.;Kelly, Morgan W.
通讯作者：
Kelly, Morgan W.

Synergistic Effects of Temperature and Salinity on the Gene Expression and Physiology of Crassostrea virginica

DOI：
10.1093/icb/icz035
发表时间：
2019-08-01
期刊：
INTEGRATIVE AND COMPARATIVE BIOLOGY
影响因子：
2.6
作者：
Jones, H. R.;Johnson, K. M.;Kelly, M. W.
通讯作者：
Kelly, M. W.

Tolerance of northern Gulf of Mexico eastern oysters to chronic warming at extreme salinities

墨西哥湾北部东部牡蛎对极端盐度下长期变暖的耐受性

DOI：
10.1016/j.jtherbio.2021.103072
发表时间：
2021
期刊：
Journal of Thermal Biology
影响因子：
2.7
作者：
Marshall, Danielle A.;Coxe, Nicholas C.;La Peyre, Megan K.;Walton, William C.;Rikard, F. Scott;Pollack, Jennifer Beseres;Kelly, Morgan W.;La Peyre, Jerome F.
通讯作者：
La Peyre, Jerome F.