Productivity assessment of two kelps, Saccharina latissima and Alaria marginata, at varying seawater depths

Abstract

Climate change now affects virtually all forms of life, disrupting the foundations existence on Earth. Major reductions in greenhouse gases are vital, but mitigation strategies to reduce extreme impacts must be implemented now. Importantly, the healthy functioning of the ocean is the ultimate reservoir of stability for living beings. Anthropogenic emissions are raising ocean temperatures and acidification beyond its immense buffering capacity. Mitigation efforts must include kelp forest restoration and ocean aquaculture. This in situ experiment examined Saccharina latissma and Alaria marginata kelps to assess their productivity in assimilating carbon relative to growing depth. Light played an important role, due to attenuation with depth. Future research should work to optimize species mix and spatial configurations, over longer durations.