Linear extension measurements of species from two common morphotypes of coralline algae found in Sitka Sound, AK. from 2017 - 2019 (High latitude kelp dynamics project)

This data represents in-situ seasonal changes in coralline algae growth rates. Algal individuals were collected from a crustose coralline algal genus and a geniculate coralline species from a subtidal rocky reef directly adjacent to Harris Is., Sitka Sound, AK in December 2017, July 2018, and January 2019. Crustose individuals targeted for collection were those that had a morphology that could easily be separated from the rocky substrate, often disc-shaped with distinct white growing edges. To measure linear growth, the coralline algae were imaged using a fluorescent lamp channel on a Ziess AxioZoom microscope at the UCSC Microscopy Center.