Dissolution Dominates Silica Cycling in a Shelf Sea Autumn Bloom

Alex J. Poulton; Kyle M. J. Mayers; Chris J. Daniels; Mark C. Stinchcombe; E. Malcolm S. Woodward; Joanne Hopkins; Julianne U. Wihsgott; Claire E. Widdicombe

doi:10.1029/2019GL083558

Dissolution Dominates Silica Cycling in a Shelf Sea Autumn Bloom

Alex J. Poulton
, Kyle M. J. Mayers
, Chris J. Daniels
, Mark C. Stinchcombe
, E. Malcolm S. Woodward
, Joanne Hopkins
, Julianne U. Wihsgott
, Claire E. Widdicombe

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

88 Downloads (Pure)

Abstract

Autumn phytoplankton blooms represent key periods of production in temperate and high-latitude seas. Biogenic silica (bSiO2) production, dissolution and standing stocks were determined in the Celtic Sea (United Kingdom) during November 2014. Dissolution rates were in excess of bSiO2 production, indicating a net loss of bSiO2. Estimated diatom bSiO2 contributed ≤10% to total bSiO2, with detrital bSiO2 supporting rapid Si-cycling. Based on the average biomass-specific dissolution rate (0.2 d-1), 3 weeks would be needed to dissolve 99% of the bSiO2 present. Negative net bSiO2 production was associated with low-light conditions (<4 E m-2 d-1). Our observations imply that dissolution dominates Si-cycling during autumn, with low-light conditions also likely to influence Si-cycling during winter and early spring.

Original language	English
Pages (from-to)	6765-6774
Number of pages	10
Journal	Geophysical Research Letters
Volume	46
Issue number	12
Early online date	4 Jun 2019
DOIs	https://doi.org/10.1029/2019GL083558
Publication status	Published - 28 Jun 2019

Keywords

autumn
bloom
coastal
diatoms
dissolution
silica

ASJC Scopus subject areas

Geophysics
General Earth and Planetary Sciences

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title = "Dissolution Dominates Silica Cycling in a Shelf Sea Autumn Bloom",

abstract = "Autumn phytoplankton blooms represent key periods of production in temperate and high-latitude seas. Biogenic silica (bSiO2) production, dissolution and standing stocks were determined in the Celtic Sea (United Kingdom) during November 2014. Dissolution rates were in excess of bSiO2 production, indicating a net loss of bSiO2. Estimated diatom bSiO2 contributed ≤10\% to total bSiO2, with detrital bSiO2 supporting rapid Si-cycling. Based on the average biomass-specific dissolution rate (0.2 d-1), 3 weeks would be needed to dissolve 99\% of the bSiO2 present. Negative net bSiO2 production was associated with low-light conditions (<4 E m-2 d-1). Our observations imply that dissolution dominates Si-cycling during autumn, with low-light conditions also likely to influence Si-cycling during winter and early spring. ",

keywords = "autumn, bloom, coastal, diatoms, dissolution, silica",

author = "Poulton, \{Alex J.\} and Mayers, \{Kyle M. J.\} and Daniels, \{Chris J.\} and Stinchcombe, \{Mark C.\} and Woodward, \{E. Malcolm S.\} and Joanne Hopkins and Wihsgott, \{Julianne U.\} and Widdicombe, \{Claire E.\}",

year = "2019",

month = jun,

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doi = "10.1029/2019GL083558",

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TY - JOUR

T1 - Dissolution Dominates Silica Cycling in a Shelf Sea Autumn Bloom

AU - Poulton, Alex J.

AU - Mayers, Kyle M. J.

AU - Daniels, Chris J.

AU - Stinchcombe, Mark C.

AU - Woodward, E. Malcolm S.

AU - Hopkins, Joanne

AU - Wihsgott, Julianne U.

AU - Widdicombe, Claire E.

PY - 2019/6/28

Y1 - 2019/6/28

N2 - Autumn phytoplankton blooms represent key periods of production in temperate and high-latitude seas. Biogenic silica (bSiO2) production, dissolution and standing stocks were determined in the Celtic Sea (United Kingdom) during November 2014. Dissolution rates were in excess of bSiO2 production, indicating a net loss of bSiO2. Estimated diatom bSiO2 contributed ≤10% to total bSiO2, with detrital bSiO2 supporting rapid Si-cycling. Based on the average biomass-specific dissolution rate (0.2 d-1), 3 weeks would be needed to dissolve 99% of the bSiO2 present. Negative net bSiO2 production was associated with low-light conditions (<4 E m-2 d-1). Our observations imply that dissolution dominates Si-cycling during autumn, with low-light conditions also likely to influence Si-cycling during winter and early spring.

AB - Autumn phytoplankton blooms represent key periods of production in temperate and high-latitude seas. Biogenic silica (bSiO2) production, dissolution and standing stocks were determined in the Celtic Sea (United Kingdom) during November 2014. Dissolution rates were in excess of bSiO2 production, indicating a net loss of bSiO2. Estimated diatom bSiO2 contributed ≤10% to total bSiO2, with detrital bSiO2 supporting rapid Si-cycling. Based on the average biomass-specific dissolution rate (0.2 d-1), 3 weeks would be needed to dissolve 99% of the bSiO2 present. Negative net bSiO2 production was associated with low-light conditions (<4 E m-2 d-1). Our observations imply that dissolution dominates Si-cycling during autumn, with low-light conditions also likely to influence Si-cycling during winter and early spring.

KW - autumn

KW - bloom

KW - coastal

KW - diatoms

KW - dissolution

KW - silica

UR - https://www.scopus.com/pages/publications/85068190371

U2 - 10.1029/2019GL083558

DO - 10.1029/2019GL083558

M3 - Article

SN - 0094-8276

VL - 46

SP - 6765

EP - 6774

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 12

ER -

Dissolution Dominates Silica Cycling in a Shelf Sea Autumn Bloom

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Keywords

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