Individual thermal stress survivorship measurements from 10 copepod populations from Coastal Northwest Atlantic Surface Waters from 2017-07-15 to 2018-07-26

Data Type: experimental
Version: 0
Version Date: 2020-07-08

» Collaborative Research: Response of marine copepods to warming temperature and ocean acidification (Copepod Response to Warming Temp and OA)
Dam, Hans G.University of Connecticut (UConn)Principal Investigator
Biddle, MathewWoods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager

Individual thermal stress survivorship measurements from 10 copepod populations from Coastal Northwest Atlantic Surface Waters from 2017-07-15 to 2018-07-26.


Spatial Extent: N:46.27291 E:-64.575143 S:25.283653 W:-82.6674
Temporal Extent: 2017-07-15 - 2018-07-26

Dataset Description

Detailed methods are presented in Sasaki & Dam 2019 (DOI: 10.1111/gcb.14811). Copepods were collected from ten locations across the Northwest Atlantic (recorded in the Population column). Populations were maintained at the UConn Avery Point campus for three generations at 18oC, with a 12:12 light:dark cycle and a diet of Tetrasemis sp., Thalassiosira weissflogii, and Rhodomonas salina.

Methods & Sampling

F3 generation eggs were collected and split into two groups, which developed at either 18oC or 22oC (recorded in the Dev_temp column). Once mature, healthy females were exposed to a 24-hour acute heat shock, after which individual survivorship was recorded using a dissection microscope (recorded in the Survivorship column). Each female experienced only a single temperature during the heat shock (recorded in the Stress_temp column).

Data Processing Description

Data was not processed before analyses. All analyses were performed with the raw data in R version 3.0. Survivorship curves were estimated using a logistic regression (glm function from the stats package). Thermal tolerance was estimated from the survivorship curves with the dose.p function (MASS package). Correlations were performed using linear regressions (lm function from the stats package).

BCO-DMO Processing Notes:
- added conventional header with dataset name, PI name, version date
- modified parameter names to conform with BCO-DMO naming conventions
- added Latitude, Longitude, and Collection_Date columns



[ table of contents | back to top ]

Related Publications

Sasaki, M. C., & Dam, H. G. (2019). Integrating patterns of thermal tolerance and phenotypic plasticity with population genetics to improve understanding of vulnerability to warming in a widespread copepod. Global Change Biology, 25(12), 4147–4164. doi:10.1111/gcb.14811

[ table of contents | back to top ]


Populationpopulation of origin unitless
Stress_tempThermal stress temperature degrees Celsius (C)
Dev_tempDevelopmental temperature degrees Celsius (C)
IndividualIndividual number during heat stress unitless
Survivorshipindicates if individual survived or died unitless
Collection_DateDate of sample collection following ISO-8601 convention unitless
LatitudeLatitude of sample collection location with positive values indicating North decimal degrees
LongitudeLongitude of sample collection location with negative values indicating West decimal degrees

[ table of contents | back to top ]


Dataset-specific Instrument Name
plankton net
Generic Instrument Name
Plankton Net
Dataset-specific Description
Copepods were collected with a 250 micrometer mesh plankton net with a solid cod end.
Generic Instrument Description
A Plankton Net is a generic term for a sampling net that is used to collect plankton. It is used only when detailed instrument documentation is not available.

[ table of contents | back to top ]

Project Information

Collaborative Research: Response of marine copepods to warming temperature and ocean acidification (Copepod Response to Warming Temp and OA)

Coverage: North western Atlantic ocean; Gulf of Maine, coastal and estuarine habitats

NSF Award Abstract:
Over time, our oceans are becoming both warmer and higher dissolved carbon dioxide. The latter condition is called ocean acidification. The consequences of these simultaneous changes for populations of marine organisms are not well understood. For this project, the investigators will conduct a series of laboratory experiments to determine how two closely-related, common species of Acartia copepods will respond to the interactive effects of warming and acidification and also how well these species can adapt over multiple generations to changing ocean conditions. Since these copepods are key species in coastal food webs, results will have important implications for understanding and predicting how marine ecosystems may respond to future climate change. The investigators will share results from the research through traditional print media, case studies, and video mini lectures. The goal will be for educators of all levels to easily access material on climate change and ocean acidification to include in teaching curricula, in alignment with recommendations for universal design for learning. The project is a collaborative effort between an established professor at the University of Connecticut and an early-career female scientist at the University of Vermont. It will provide training and opportunities for collaborative, interdisciplinary research for two postdoctoral investigators, two graduate students and an undergraduate student.

The project's main goals are: 1) to test the simultaneous effects of temperature and carbon dioxide under current and future conditions on life history traits throughout the life cycle for two key copepod species, warm-adapted Acartia tonsa and cold-adapted Acartia hudsonica; 2) to test for adaptive capacity of both copepod species to a warmer and carbon-dioxide-enriched ocean; 3) to measure the genetic and maternally-induced changes across multiple generations of experimental selection in future conditions in both copepod species, and to identify the genes and pathways responding to selection. The investigators will use experiments encompassing current and projected temperature and carbon-dioxide conditions, will determine the roles of each variable and their interaction on traits that affect the fitness of both copepod species. They will also determine which life stages are most sensitive to individual or simultaneous stress conditions. Through multigenerational selection experiments, the investigators will identify and characterize the mechanisms of copepod evolutionary adaptation. Finally, they will measure genomic changes across the generations under all four experimental conditions to quantify the relative contributions of genetic and maternally-induced change in the physiological and life history traits of copepods in response to near-future climate conditions.

[ table of contents | back to top ]


Funding SourceAward
NSF Division of Ocean Sciences (NSF OCE)

[ table of contents | back to top ]