Preprint Brief Report Version 1 Preserved in Portico This version is not peer-reviewed

Nitrogen and Carbon Removal Capacity by Farmed Kelp Varies by Species

Version 1 : Received: 8 March 2022 / Approved: 10 March 2022 / Online: 10 March 2022 (10:35:01 CET)

How to cite: Umanzor, S.; Stephens, T. Nitrogen and Carbon Removal Capacity by Farmed Kelp Varies by Species. Preprints 2022, 2022030144 (doi: 10.20944/preprints202203.0144.v1). Umanzor, S.; Stephens, T. Nitrogen and Carbon Removal Capacity by Farmed Kelp Varies by Species. Preprints 2022, 2022030144 (doi: 10.20944/preprints202203.0144.v1).

Abstract

An increasing body of evidence shows that seaweeds, including kelp, can be used as a tool to neutralize or remove excess nutrients and metals from the water column. Here we report on a preliminary field assessment showing potential nutrient and carbon removal differences by sugar kelp and ribbon kelp grown in common gardens. Seawater and tissue samples were collected systematically from two farms in Alaska. Results show differences between % N and % C content between ribbon kelp (Alaria marginata) and sugar kelp (Saccharina latissima). Results also show that tissue nitrogen in ribbon kelp varies sharply due to nitrogen availability in the water column. In contrast, the percentage of tissue N in sugar kelp remains comparatively stable. Our outcomes provide insight into potential differences in nutrient removal and harvest timing for different kelp species.

Keywords

Alaria marginata; common garden; mariculture; ribbon kelp; sugar kelp; Saccharina latissima

Subject

BIOLOGY, Ecology

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