Environmental factors influencing primary productivity of the forest-forming kelp Laminaria hyperborea in the northeast Atlantic.

Scientific Reports
Dan A SmaleP. J. Moore

Abstract

Rates and drivers of primary productivity are well understood for many terrestrial ecosystems, but remain poorly resolved for many marine ecosystems, particularly those within in coastal benthic environments. We quantified net primary productivity (NPP) using two methods as well as carbon standing stock within kelp forests (Laminaria hyperborea) at multiple subtidal habitats in the United Kingdom (UK). Study sites spanned 9° in latitude and encompassed a gradient in average temperature of ~ 2.5 °C. In addition to temperature, we measured other factors (e.g. light intensity, water motion, nutrients, sea urchin density) that may influence productivity. Although estimates of NPP were highly variable between sites, ranging from 166 to 738 g C m-2 yr-1, our study-wide average of 340 g C m-2 yr-1 indicated that L. hyperborea forests are highly productive. We observed clear differences between NPP and carbon standing stock between our cold northernmost sites and our warm southernmost sites, with NPP and standing stock being around 1.5 and 2.5 times greater in the northern sites, respectively. Ocean temperature was identified as a likely driver of productivity, with reduced NPP and standing stock observed in warmer waters. Light availa...Continue Reading

References

Jan 19, 2008·Nature·Martin Heimann, Markus Reichstein
May 21, 2008·Oecologia·Mathew A Vanderklift, Thomas Wernberg
Jan 23, 2016·Global Change Biology·Kristina J Anderson-TeixeiraDavid S LeBauer
Sep 7, 2019·Nature Communications·Peter I MacreadieCarlos M Duarte

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Citations

Jun 25, 2021·Ecology·Khashiff K MirandaCatherine A Pfister

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