Evidence of local adaptation in a freshwater diatom indicates higher sensitivity to nutrient limitation as water temperature rises

Climate change is reshaping freshwater ecosystems by warming waters and modifying nutrient dynamics. These combined environmental changes exert novel gradients of selection on phytoplankton populations and communities. Temperature and phosphorus availability are individually critical determinants of growth in phytoplankton, and can have interactive impacts on population and community dynamics. While we understand how interspecific variation in thermal and resource-use traits of phytoplankton can affect community composition in response to changing environments, the extent of local adaptation in these responses among strains of the same species remains poorly understood. In this study, we examined the local adaptation in the temperature- and phosphorus-dependences of growth in the freshwater diatom Fragilaria crotonensis. We predict that the growth of this diatom is locally adapted to the environmental conditions of the lakes of origin. To test this, we isolated strains from eight S..., , # Evidence of local adaptation in a freshwater diatom indicates higher sensitivity to nutrient limitation as water temperature rises

Dataset DOI: [10.5061/dryad.83bk3jb58](10.5061/dryad.83bk3jb58)

## Authors

Name: Li Zhao
Institution: Department of Aquatic Ecology, Eawag, Dübendorf, Switzerland
Email: [[e-mail]](mailto:[e-mail])

Name: Divina Ryf
Institution: Department of Aquatic Ecology, Eawag, Dübendorf, Switzerland
Email: [[e-mail]](mailto:[e-mail])

Name: Sarah Levasseur
Institution: Department of Aquatic Ecology, Eawag, Dübendorf, Switzerland

Name: Raphaël Bossart
Institution: Department of Aquatic Ecology, Eawag, Dübendorf, Switzerland

Name: Marta Reyes
Institution: Department of Aquatic Ecology, Eawag, Dübendorf, Switzerland

Name: Frank Pennekamp
Institution: Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zurich, Switzerland

Name: Jukka Jokela
Institution: Department of Aquatic Ecology,...,