Marine phytoplankton play essential roles in global primary production and biogeochemical cycles. Yet, the evolutionary genetic underpinnings of phytoplankton adaptation to complex marine and coastal environments, where many environmental variables fluctuate and interact, remain unclear. We combined population genomics with experimental transcriptomics to investigate the genomic basis underlying a natural evolutionary experime...

Climate warming impacts ecosystems through multiple interacting pathways, including via direct thermal responses of individual taxa and the combined responses of closely interacting species. In this study, we examined how warming and infection by an oomycete parasite ( Saprolegnia ) affect the dominant zooplankter of Russia's Lake Baikal, the endemic copepod Epischurella baikalensis . We used a combination of laboratory experi...

Strategies for optimizing fitness in a dilute, competitive, and changing environment are thought to underlie cell size evolution in phytoplankton. Support for cell size as an adaptive trait comes from observed shifts in cell size distributions in response to environmental cues at geologic time scales and across environmental gradients. Physicochemical differences between marine and freshwater environments are thought to drive...