Taxonomic assessment of blade-forming Ulva species (Ulvales, Chlorophyta) in the Galápagos Archipelago, Ecuador using DNA sequencing

• DOI: 10.1515/bot-2023-0079
• Publication Date: 2024-02-17T13:10:57Z
• Authors: Paul W. Gabrielson; Anna Claire Smith; John F. Bruno; Todd J. Vision; Margarita Brandt
• Keywords: Ulva lactuca; Archipelago; Ulvophyceae; DNA Barcoding

Abstract DNA sequences were obtained from 32 blade-forming Ulva specimens collected in 2018 and 2019 four islands the Galápagos Archipelago: Fernandina, Floreana, Isabela San Cristóbal. The loci sequenced nuclear encoded ITS plastid rbc L tuf A, all recognized as barcode markers for green algae. Four species found, adhaerens , U. lactuca ohnoi tanneri of which have had their type sequenced, ensuring correct application these names. Only one these, was reported historically archipelago. most commonly widely distributed, occurring on islands. Previously known only Japan Korea, this is first report southeast Pacific Ocean. three islands, Isabela, Cristóbal, last two. a diminutive, 1–2 cm tall, high intertidal that easily overlooked, but likely far more common than specimen collected. This study confirms concerted effort, using sequencing, needed to document seaweed flora Archipelago.