Comparison of Spatial and Temporal Genetic Differentiation in a Harmful Dinoflagellate Species Emphasizes Impact of Local Processes
Population genetic studies provide insights into intraspecific diversity and dispersal patterns of microorganisms such as protists, which help understanding invasions, harmful algal bloom development and occurrence of seafood poisoning. Spatial genetic differentiation has been reported in many micro...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2018-10-01
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| Series: | Frontiers in Marine Science |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fmars.2018.00393/full |
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| author | Ingrid Sassenhagen Ingrid Sassenhagen Yida Gao Yesid Lozano-Duque Michael L. Parsons Tyler B. Smith Deana L. Erdner |
| author_facet | Ingrid Sassenhagen Ingrid Sassenhagen Yida Gao Yesid Lozano-Duque Michael L. Parsons Tyler B. Smith Deana L. Erdner |
| author_sort | Ingrid Sassenhagen |
| collection | DOAJ |
| description | Population genetic studies provide insights into intraspecific diversity and dispersal patterns of microorganisms such as protists, which help understanding invasions, harmful algal bloom development and occurrence of seafood poisoning. Spatial genetic differentiation has been reported in many microbial species indicating significant dispersal barriers among different habitats. Temporal differentiation has been less studied and its frequency, drivers, and magnitude are thus relatively poorly understood. The toxic dinoflagellate species Gambierdiscus caribaeus was sampled during 2 years in the Florida Keys, and repeatedly from 2006 to 2016 at St. Thomas, US Virgin Islands (USVI), including a 3-year period with monthly sampling, enabling a comparison of spatial and temporal genetic differentiation. Samples from the USVI site showed high temporal variability in local population structure, which correlated with changes in salinity and benthic habitat cover. In some cases, temporal variability exceeded spatial differentiation, despite apparent lack of connectivity and dispersal across the Greater Caribbean Region based on the spatial genetic data. Thus, local processes such as selection might have a stronger influence on population structure in microorganisms than geographic distance. The observed high temporal genetic diversity challenges the prediction of harmful algal blooms and toxin concentrations, but illustrates also the evolutionary potential of microalgae to respond to environmental change. |
| first_indexed | 2024-12-19T22:29:51Z |
| format | Article |
| id | doaj.art-3cd709f7e9a643e08762651beff47d7e |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-12-19T22:29:51Z |
| publishDate | 2018-10-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-3cd709f7e9a643e08762651beff47d7e2022-12-21T20:03:23ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452018-10-01510.3389/fmars.2018.00393412401Comparison of Spatial and Temporal Genetic Differentiation in a Harmful Dinoflagellate Species Emphasizes Impact of Local ProcessesIngrid Sassenhagen0Ingrid Sassenhagen1Yida Gao2Yesid Lozano-Duque3Michael L. Parsons4Tyler B. Smith5Deana L. Erdner6Marine Science Institute, The University of Texas at Austin, Port Aransas, TX, United StatesLaboratoire d’Océanologie et des Geosciences, UMR LOG 8187, Université du Littoral Côte d’Opale, Wimereux, FranceMarine Science Institute, The University of Texas at Austin, Port Aransas, TX, United StatesMarine Science Institute, The University of Texas at Austin, Port Aransas, TX, United StatesCoastal Watershed Institute, Florida Gulf Coast University, Fort Myers, FL, United StatesCenter for Marine and Environmental Studies, University of the Virgin Islands, St. Thomas, VI, United StatesMarine Science Institute, The University of Texas at Austin, Port Aransas, TX, United StatesPopulation genetic studies provide insights into intraspecific diversity and dispersal patterns of microorganisms such as protists, which help understanding invasions, harmful algal bloom development and occurrence of seafood poisoning. Spatial genetic differentiation has been reported in many microbial species indicating significant dispersal barriers among different habitats. Temporal differentiation has been less studied and its frequency, drivers, and magnitude are thus relatively poorly understood. The toxic dinoflagellate species Gambierdiscus caribaeus was sampled during 2 years in the Florida Keys, and repeatedly from 2006 to 2016 at St. Thomas, US Virgin Islands (USVI), including a 3-year period with monthly sampling, enabling a comparison of spatial and temporal genetic differentiation. Samples from the USVI site showed high temporal variability in local population structure, which correlated with changes in salinity and benthic habitat cover. In some cases, temporal variability exceeded spatial differentiation, despite apparent lack of connectivity and dispersal across the Greater Caribbean Region based on the spatial genetic data. Thus, local processes such as selection might have a stronger influence on population structure in microorganisms than geographic distance. The observed high temporal genetic diversity challenges the prediction of harmful algal blooms and toxin concentrations, but illustrates also the evolutionary potential of microalgae to respond to environmental change.https://www.frontiersin.org/article/10.3389/fmars.2018.00393/fullGambierdiscusmicroalgaepopulation structuremicrosatelliteslocal adaptationgenetic drift |
| spellingShingle | Ingrid Sassenhagen Ingrid Sassenhagen Yida Gao Yesid Lozano-Duque Michael L. Parsons Tyler B. Smith Deana L. Erdner Comparison of Spatial and Temporal Genetic Differentiation in a Harmful Dinoflagellate Species Emphasizes Impact of Local Processes Frontiers in Marine Science Gambierdiscus microalgae population structure microsatellites local adaptation genetic drift |
| title | Comparison of Spatial and Temporal Genetic Differentiation in a Harmful Dinoflagellate Species Emphasizes Impact of Local Processes |
| title_full | Comparison of Spatial and Temporal Genetic Differentiation in a Harmful Dinoflagellate Species Emphasizes Impact of Local Processes |
| title_fullStr | Comparison of Spatial and Temporal Genetic Differentiation in a Harmful Dinoflagellate Species Emphasizes Impact of Local Processes |
| title_full_unstemmed | Comparison of Spatial and Temporal Genetic Differentiation in a Harmful Dinoflagellate Species Emphasizes Impact of Local Processes |
| title_short | Comparison of Spatial and Temporal Genetic Differentiation in a Harmful Dinoflagellate Species Emphasizes Impact of Local Processes |
| title_sort | comparison of spatial and temporal genetic differentiation in a harmful dinoflagellate species emphasizes impact of local processes |
| topic | Gambierdiscus microalgae population structure microsatellites local adaptation genetic drift |
| url | https://www.frontiersin.org/article/10.3389/fmars.2018.00393/full |
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