Here, a water sample is being drawn from the Valdez fjord. With this and other samples taken at varying depths, scientist are attempting to learn what effects hydrocarbons have upon photosynthesis of phyto-plankton, the primary producers in the ocean., 1977-04, PCA0002-4b-59, Folder: PCA0002-4b. Alyeska Pipeline Service Company : Trans-Alaska Pipeline Construction Collection, 1976-1977, PCA 2. Alaska State Library - Historical Collections Finding Aids. https://alaska.libraryhost.com/repositories/2/archival_objects/17851 Accessed February 22, 2025.