Predicting potential Arctic kelp distribution and lower-depth biomass from seafloor irradiance

Limnology and Oceanography: Methods.

By LC de la Guardia, I Bartsch, H Hop, S Niedzwiedz, L Dusedau, N Diehl, D Krause-Jensen, MK Sejr, TG Ager, J-P Gattuso, RW Schlegel, CA Miller, K Filbee-Dexter, P Duarte

December 1, 2025

Abstract

This paper develops a framework for estimating potential Arctic kelp distribution and lower-depth biomass from seafloor irradiance. Using fjord-specific empirical relationships, it links standing stock estimates to light availability and its drivers, providing a baseline for tracking how changing coastal light environments may alter Arctic kelp biomass under ongoing environmental change.