Contributors | Affiliation | Role |
---|---|---|
Rynearson, Tatiana A. | University of Rhode Island (URI-GSO) | Principal Investigator |
Anderson, Stephanie I. | University of Rhode Island (URI-GSO) | Contact |
Copley, Nancy | Woods Hole Oceanographic Institution (WHOI BCO-DMO) | BCO-DMO Data Manager |
This dataset includes carbon and nitrogen concentrations of Skeletonema cultures maintained at six temperatures. Strains were collected at Narragansett Bay, Rhode Island.
Complete methods are outlined in Anderson and Rynearson, 2020, in press.
Elemental Analyses: From each culture and during exponential growth phase, >1 x 107 cells were filtered in triplicate onto precombusted 25-mm GF/F filters, and rinsed with 10 ml F/2 media. Blanks were made to correct for any elemental contribution from filters or media. Filters were dried at 60 degrees C for 24 hrs. The mass of the filter, total volume filtered, and cell counts were utilized to determine the number of cells analyzed. Elemental composition was assessed on an elemental analyzer.
Cell volume: Linear measurements of height and diameter were recorded for 30 live cells from each strain and used to calculate cell volume using the volume of a cylinder (Montagnes and Franklin 2001).
All data processing was carried out in R 3.4.1(R-Core-Team 2015).
BCO-DMO Processing Notes:
- added conventional header with dataset name, PI name, version date
- re-formatted date from m/d/yyyy to yyyy-mm-dd
File |
---|
CHN.csv (Comma Separated Values (.csv), 2.86 KB) MD5:5a19430eb2211db6b26643d1b80c2ae6 Primary data file for dataset ID 780386 |
Parameter | Description | Units |
Species | Species | unitless |
Strain | Strain | unitless |
GenBank | GenBank Accession Number associated with each strain | unitless |
Collection_date | Date of collection from the environment; formatted as yyyy-mm-dd | unitless |
Isolation_Lat | Latitude of strain isolation; north is positive | degrees |
Isolation_Lon | Longitude of strain isolation; east is positive | degrees |
Isolation_Temperature | Sea surface temperature (SST) at time and position of isolation | degrees C |
Temperature | Experimental temperature at which measurements were recorded | degrees C |
meanC | Mean carbon per cell | picomol carbon per cell |
seC | Standard error of carbon per cell | picomol carbon per cell |
meanN | Mean nitrogen per cell | picomol nitrogen per cell |
seN | Standard error of nitrogen per cell | picomol nitrogen per cell |
meanCN | Average molar ratio of carbon to nitrogen per cell | unitless |
seCN | Standard error of molar carbon to nitrogen per cell | unitless |
meanV | Mean cell volume | cubic micrometers (um3) |
seV | Cell volume standard error | cubic micrometers (um3) |
mean_cd | Mean carbon density per cell | femtomol/cubic micrometers (fmol um-3) |
se_cd | Carbon density per cell standard error | femtomol/cubic micrometers (fmol um-3) |
mean_nd | Mean nitrogen density per cell | femtomol/cubic micrometers (fmol um-3) |
se_nd | Nitrogen density per cell standard error | femtomol/cubic micrometers (fmol um-3) |
Dataset-specific Instrument Name | Elemental analyzer (CE-440, Exeter Analytical, North Chelmsford, MA) |
Generic Instrument Name | CHN Elemental Analyzer |
Dataset-specific Description | Used for elemental analyses. |
Generic Instrument Description | A CHN Elemental Analyzer is used for the determination of carbon, hydrogen, and nitrogen content in organic and other types of materials, including solids, liquids, volatile, and viscous samples. |
Dataset-specific Instrument Name | Eclipse E800 microscope (Nikon, Tokyo, Japan) |
Generic Instrument Name | Microscope - Optical |
Dataset-specific Description | Used t measure cell volume. |
Generic Instrument Description | Instruments that generate enlarged images of samples using the phenomena of reflection and absorption of visible light. Includes conventional and inverted instruments. Also called a "light microscope". |
NSF Award Abstract:
Photosynthetic marine microbes, phytoplankton, contribute half of global primary production, form the base of most aquatic food webs and are major players in global biogeochemical cycles. Understanding their community composition is important because it affects higher trophic levels, the cycling of energy and elements and is sensitive to global environmental change. This project will investigate how phytoplankton communities respond to two major global change stressors in aquatic systems: warming and changes in nutrient availability. The researchers will work in two marine systems with a long history of environmental monitoring, the temperate Narragansett Bay estuary in Rhode Island and a subtropical North Atlantic site near Bermuda. They will use field sampling and laboratory experiments with multiple species and varieties of phytoplankton to assess the diversity in their responses to different temperatures under high and low nutrient concentrations. If the diversity of responses is high within species, then that species may have a better chance to adapt to rising temperatures and persist in the future. Some species may already be able to grow at high temperatures; consequently, they may become more abundant as the ocean warms. The researchers will incorporate this response information in mathematical models to predict how phytoplankton assemblages would reorganize under future climate scenarios. Graduate students and postdoctoral associates will be trained in diverse scientific approaches and techniques such as shipboard sampling, laboratory experiments, genomic analyses and mathematical modeling. The results of the project will be incorporated into K-12 teaching, including an advanced placement environmental science class for underrepresented minorities in Los Angeles, data exercises for rural schools in Michigan and disseminated to the public through an environmental journalism institute based in Rhode Island.
Predicting how ecological communities will respond to a changing environment requires knowledge of genetic, phylogenetic and functional diversity within and across species. This project will investigate how the interaction of phylogenetic, genetic and functional diversity in thermal traits within and across a broad range of species determines the responses of marine phytoplankton communities to rising temperature and changing nutrient regimes. High genetic and functional diversity within a species may allow evolutionary adaptation of that species to warming. If the phylogenetic and functional diversity is higher across species, species sorting and ecological community reorganization is likely. Different marine sites may have a different balance of genetic and functional diversity within and across species and, thus, different contribution of evolutionary and ecological responses to changing climate. The research will be conducted at two long-term time series sites in the Atlantic Ocean, the Narragansett Bay Long-Term Plankton Time Series and the Bermuda Atlantic Time Series (BATS) station. The goal is to assess intra- and inter-specific genetic and functional diversity in thermal responses at contrasting nutrient concentrations for a representative range of species in communities at the two sites in different seasons, and use this information to parameterize eco-evolutionary models embedded into biogeochemical ocean models to predict responses of phytoplankton communities to projected rising temperatures under realistic nutrient conditions. Model predictions will be informed by and tested with field data, including the long-term data series available for both sites and in community temperature manipulation experiments. This project will provide novel information on existing intraspecific genetic and functional thermal diversity for many ecologically and biogeochemically important phytoplankton species, estimate generation of new genetic and functional diversity in evolution experiments, and develop and parameterize novel eco-evolutionary models interfaced with ocean biogeochemical models to predict future phytoplankton community structure. The project will also characterize the interaction of two major global change stressors, warming and changing nutrient concentrations, as they affect phytoplankton diversity at functional, genetic, and phylogenetic levels. In addition, the project will develop novel modeling methodology that will be broadly applicable to understanding how other types of complex ecological communities may adapt to a rapidly warming world.
(adapted from the NSF Synopsis of Program)
Dimensions of Biodiversity is a program solicitation from the NSF Directorate for Biological Sciences. FY 2010 was year one of the program. [MORE from NSF]
The NSF Dimensions of Biodiversity program seeks to characterize biodiversity on Earth by using integrative, innovative approaches to fill rapidly the most substantial gaps in our understanding. The program will take a broad view of biodiversity, and in its initial phase will focus on the integration of genetic, taxonomic, and functional dimensions of biodiversity. Project investigators are encouraged to integrate these three dimensions to understand the interactions and feedbacks among them. While this focus complements several core NSF programs, it differs by requiring that multiple dimensions of biodiversity be addressed simultaneously, to understand the roles of biodiversity in critical ecological and evolutionary processes.
Funding Source | Award |
---|---|
NSF Division of Ocean Sciences (NSF OCE) |