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Shaken and stirred: the fundamental role of water motion in resource acquisition and seaweed productivity

journal contribution
posted on 2023-05-19, 06:28 authored by Catriona HurdCatriona Hurd
Water motion is the least studied of the primary drivers of seaweed productivity. In 50% of field studies, seaweed growth and productivity is reduced in slow compared to fast flows and this is partly explained by the reduced transport of dissolved nutrients (e.g. nitrogen) across thicker diffusion boundary layers (DBLs) that form in slow flows. Alternative/additional explanations include increased light heterogeneity stimulating productivity at wave-exposed sites, and a drag-induced enhancement of inorganic carbon uptake and allocation to structural material. Higher growth rates at wave-sheltered sites may be explained by the accumulation of nitrogen regenerated by associated fauna within DBLs, whereas reduced growth in slow flows may be a result of OH- or O2 accumulation rather than reduced nutrient supply.

History

Publication title

Perspectives in Phycology

Volume

4

Pagination

73-81

ISSN

2364-6993

Department/School

Institute for Marine and Antarctic Studies

Publisher

E. Schweizerbart'sche Verlagsbuchhandlung

Place of publication

Johannesstr 3A, Stuttgart, 70176 Germany

Rights statement

© 2017 E. Schweizerbart’sche Verlagsbuchhandlung

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the biological sciences

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