The University of Southampton
University of Southampton Institutional Repository

The impact of fine-scale turbulence on phytoplankton community structure: Phytoplankton and turbulence

The impact of fine-scale turbulence on phytoplankton community structure: Phytoplankton and turbulence
The impact of fine-scale turbulence on phytoplankton community structure: Phytoplankton and turbulence
We examined the effect of fine-scale fluid turbulence on phytoplankton community structure in an idealized, size-structured community model. It has been shown that turbulence can enhance nutrient transport toward a cell, particularly for larger cells in highly turbulent conditions. Our model suggests that under weak grazing pressure the effect of this mechanism on relative phytoplankton fitness and community structure is negligible. Under these conditions, the high nutrient affinity of small cells dominates relative fitness and allows them to outcompete larger cells. In contrast, when grazing pressure is strong, the turbulent enhancement of nutrient uptake and fitness for larger cells can become ecologically significant. Here, increasing turbulence broadens the size range of coexisting phytoplankton and increases the size of the dominant cell type at equilibrium. We also estimate and map open ocean turbulent dissipation rates as a function of climatological surface wind stresses. The turbulent enhancement of nutrient uptake is most likely to be ecologically significant in regions with low nutrient levels, strong grazing pressure, and relatively high turbulence, such as in windier portions of the subtropical gyre or post-bloom conditions at higher latitudes. In these regions, turbulence may help sustain larger cell populations through otherwise unfavorable environmental conditions.
2157-3689
34-49
Barton, Andrew D.
7ca404e5-783a-47d5-bc18-3a6c47001b20
Ward, Ben A.
9063af30-e344-4626-9470-8db7c1543d05
Williams, Richard G.
2155309e-1c07-4365-b46a-04baeb2fb63c
Follows, Michael J.
12c723bc-f2f8-43f4-a309-bff6885b9c7c
Barton, Andrew D.
7ca404e5-783a-47d5-bc18-3a6c47001b20
Ward, Ben A.
9063af30-e344-4626-9470-8db7c1543d05
Williams, Richard G.
2155309e-1c07-4365-b46a-04baeb2fb63c
Follows, Michael J.
12c723bc-f2f8-43f4-a309-bff6885b9c7c

Barton, Andrew D., Ward, Ben A., Williams, Richard G. and Follows, Michael J. (2014) The impact of fine-scale turbulence on phytoplankton community structure: Phytoplankton and turbulence. Limnology and Oceanography: Fluids and Environments, 4 (1), 34-49. (doi:10.1215/lof3.v4.1).

Record type: Article

Abstract

We examined the effect of fine-scale fluid turbulence on phytoplankton community structure in an idealized, size-structured community model. It has been shown that turbulence can enhance nutrient transport toward a cell, particularly for larger cells in highly turbulent conditions. Our model suggests that under weak grazing pressure the effect of this mechanism on relative phytoplankton fitness and community structure is negligible. Under these conditions, the high nutrient affinity of small cells dominates relative fitness and allows them to outcompete larger cells. In contrast, when grazing pressure is strong, the turbulent enhancement of nutrient uptake and fitness for larger cells can become ecologically significant. Here, increasing turbulence broadens the size range of coexisting phytoplankton and increases the size of the dominant cell type at equilibrium. We also estimate and map open ocean turbulent dissipation rates as a function of climatological surface wind stresses. The turbulent enhancement of nutrient uptake is most likely to be ecologically significant in regions with low nutrient levels, strong grazing pressure, and relatively high turbulence, such as in windier portions of the subtropical gyre or post-bloom conditions at higher latitudes. In these regions, turbulence may help sustain larger cell populations through otherwise unfavorable environmental conditions.

Full text not available from this repository.

More information

Published date: 1 April 2014

Identifiers

Local EPrints ID: 417012
URI: http://eprints.soton.ac.uk/id/eprint/417012
ISSN: 2157-3689
PURE UUID: 596a2cf4-d2c0-4d7a-bcf8-29107c1da251

Catalogue record

Date deposited: 17 Jan 2018 17:30
Last modified: 13 Mar 2019 19:00

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×