Spatial patterns of aerobic and anaerobic mineralization rates and oxygen penetration dynamics in coral reef sediments
Identifieur interne : 001148 ( Main/Exploration ); précédent : 001147; suivant : 001149Spatial patterns of aerobic and anaerobic mineralization rates and oxygen penetration dynamics in coral reef sediments
Auteurs : Ursula Werner [Allemagne] ; Paul Bird [Australie] ; Christian Wild [Allemagne] ; Timothy Ferdelman [Allemagne] ; Lubos Polerecky [Allemagne] ; Gabriele Eickert [Allemagne] ; Ron Jonstone [Australie] ; Ove Hoegh-Guldberg [Australie] ; Dirk De Beer [Allemagne]Source :
- Marine ecology. Progress series : (Halstenbek) [ 0171-8630 ] ; 2006.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Oxygène, Milieu marin.
English descriptors
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Abstract
Oxygen consumption rates (OCR), aerobic mineralization and sulfate reduction rates (SRR) were studied in the permeable carbonate reef sediments of Heron Reef, Australia. We selected 4 stations with different hydrodynamic regimes for this study. In situ oxygen penetration into the sediments was measured with an autonomous microsensor profiler. Areal OCR were quantified from the measured oxygen penetration depth and volumetric OCR. Oxygen penetration and dynamics (median penetration depths at the 4 stations ranged between 0.3 and 2.2 cm), OCR (median 57 to 196 mmol C m-2 d-1), aerobic mineralization (median 24 to 176 mmol C m-2 d-1) and SRR (median 9 to 42 mmol C m-2 d-1) were highly variable between sites. The supply of oxygen by pore water advection was a major cause for high mineralization rates by stimulating aerobic mineralization at all sites. However, estimated bottom water filtration rates could not explain the differences in volumetric OCR and SRR between the 4 stations. This suggests that local mineralization rates are additionally controlled by factors other than current driven pore water advection, e.g. by the distribution of the benthic fauna or by local differences in labile organic carbon supply from sources such as benthic photosynthesis. Carbon mineralization rates were among the highest reported for coral reef sediments, stressing the role of these sediments in the functioning of the reef ecosystem.
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Celsiusstr. 1</s1><s2>28359 Bremen</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>9 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="3">Brême (Land)</region><settlement type="city">Brême</settlement></placeName></affiliation></author><author><name sortKey="Ferdelman, Timothy" sort="Ferdelman, Timothy" uniqKey="Ferdelman T" first="Timothy" last="Ferdelman">Timothy Ferdelman</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Max Planck Institute for Marine Microbiology, Celsiusstr. 1</s1><s2>28359 Bremen</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>9 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="3">Brême (Land)</region><settlement type="city">Brême</settlement></placeName></affiliation></author><author><name sortKey="Polerecky, Lubos" sort="Polerecky, Lubos" uniqKey="Polerecky L" first="Lubos" last="Polerecky">Lubos Polerecky</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Max Planck Institute for Marine Microbiology, Celsiusstr. 1</s1><s2>28359 Bremen</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>9 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="3">Brême (Land)</region><settlement type="city">Brême</settlement></placeName></affiliation></author><author><name sortKey="Eickert, Gabriele" sort="Eickert, Gabriele" uniqKey="Eickert G" first="Gabriele" last="Eickert">Gabriele Eickert</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Max Planck Institute for Marine Microbiology, Celsiusstr. 1</s1><s2>28359 Bremen</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>9 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="3">Brême (Land)</region><settlement type="city">Brême</settlement></placeName></affiliation></author><author><name sortKey="Jonstone, Ron" sort="Jonstone, Ron" uniqKey="Jonstone R" first="Ron" last="Jonstone">Ron Jonstone</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Centre for Marine Studies, The University of Queensland</s1><s2>Brisbane, Queensland 4072</s2><s3>AUS</s3><sZ>2 aut.</sZ><sZ>7 aut.</sZ><sZ>8 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Brisbane, Queensland 4072</wicri:noRegion></affiliation></author><author><name sortKey="Hoegh Guldberg, Ove" sort="Hoegh Guldberg, Ove" uniqKey="Hoegh Guldberg O" first="Ove" last="Hoegh-Guldberg">Ove Hoegh-Guldberg</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Centre for Marine Studies, The University of Queensland</s1><s2>Brisbane, Queensland 4072</s2><s3>AUS</s3><sZ>2 aut.</sZ><sZ>7 aut.</sZ><sZ>8 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Brisbane, Queensland 4072</wicri:noRegion></affiliation></author><author><name sortKey="De Beer, Dirk" sort="De Beer, Dirk" uniqKey="De Beer D" first="Dirk" last="De Beer">Dirk De Beer</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Max Planck Institute for Marine Microbiology, Celsiusstr. 1</s1><s2>28359 Bremen</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>9 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="3">Brême (Land)</region><settlement type="city">Brême</settlement></placeName></affiliation></author></analytic><series><title level="j" type="main">Marine ecology. Progress series : (Halstenbek)</title><title level="j" type="abbreviated">Mar. ecol., Prog. ser. : (Halstenbek)</title><idno type="ISSN">0171-8630</idno><imprint><date when="2006">2006</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Marine ecology. Progress series : (Halstenbek)</title><title level="j" type="abbreviated">Mar. ecol., Prog. ser. : (Halstenbek)</title><idno type="ISSN">0171-8630</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aerobe</term><term>Anaerobe</term><term>Cnidaria</term><term>Coral reef</term><term>In situ</term><term>Marine environment</term><term>Microsensor</term><term>Mineralization</term><term>Oxygen</term><term>Oxygen consumption</term><term>Penetration</term><term>Sand</term><term>Sediments</term><term>Spatial distribution</term><term>Spatial variation</term><term>Sulfates</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Variation spatiale</term><term>Répartition spatiale</term><term>Aérobie</term><term>Anaérobie</term><term>Minéralisation</term><term>Oxygène</term><term>Pénétration</term><term>Récif corallien</term><term>Sédiment</term><term>Sable</term><term>Consommation oxygène</term><term>Sulfate</term><term>Microcapteur</term><term>In situ</term><term>Milieu marin</term><term>Cnidaria</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Oxygène</term><term>Milieu marin</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Oxygen consumption rates (OCR), aerobic mineralization and sulfate reduction rates (SRR) were studied in the permeable carbonate reef sediments of Heron Reef, Australia. We selected 4 stations with different hydrodynamic regimes for this study. In situ oxygen penetration into the sediments was measured with an autonomous microsensor profiler. Areal OCR were quantified from the measured oxygen penetration depth and volumetric OCR. Oxygen penetration and dynamics (median penetration depths at the 4 stations ranged between 0.3 and 2.2 cm), OCR (median 57 to 196 mmol C m<sup>-2</sup> d<sup>-1</sup>), aerobic mineralization (median 24 to 176 mmol C m<sup>-2</sup> d<sup>-1</sup>) and SRR (median 9 to 42 mmol C m<sup>-2</sup> d<sup>-1</sup>) were highly variable between sites. The supply of oxygen by pore water advection was a major cause for high mineralization rates by stimulating aerobic mineralization at all sites. However, estimated bottom water filtration rates could not explain the differences in volumetric OCR and SRR between the 4 stations. This suggests that local mineralization rates are additionally controlled by factors other than current driven pore water advection, e.g. by the distribution of the benthic fauna or by local differences in labile organic carbon supply from sources such as benthic photosynthesis. Carbon mineralization rates were among the highest reported for coral reef sediments, stressing the role of these sediments in the functioning of the reef ecosystem.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>Australie</li></country><region><li>Brême (Land)</li></region><settlement><li>Brême</li></settlement></list><tree><country name="Allemagne"><region name="Brême (Land)"><name sortKey="Werner, Ursula" sort="Werner, Ursula" uniqKey="Werner U" first="Ursula" last="Werner">Ursula Werner</name></region><name sortKey="De Beer, Dirk" sort="De Beer, Dirk" uniqKey="De Beer D" first="Dirk" last="De Beer">Dirk De Beer</name><name sortKey="Eickert, Gabriele" sort="Eickert, Gabriele" uniqKey="Eickert G" first="Gabriele" last="Eickert">Gabriele Eickert</name><name sortKey="Ferdelman, Timothy" sort="Ferdelman, Timothy" uniqKey="Ferdelman T" first="Timothy" last="Ferdelman">Timothy Ferdelman</name><name sortKey="Polerecky, Lubos" sort="Polerecky, Lubos" uniqKey="Polerecky L" first="Lubos" last="Polerecky">Lubos Polerecky</name><name sortKey="Wild, Christian" sort="Wild, Christian" uniqKey="Wild C" first="Christian" last="Wild">Christian Wild</name></country><country name="Australie"><noRegion><name sortKey="Bird, Paul" sort="Bird, Paul" uniqKey="Bird P" first="Paul" last="Bird">Paul Bird</name></noRegion><name sortKey="Hoegh Guldberg, Ove" sort="Hoegh Guldberg, Ove" uniqKey="Hoegh Guldberg O" first="Ove" last="Hoegh-Guldberg">Ove Hoegh-Guldberg</name><name sortKey="Jonstone, Ron" sort="Jonstone, Ron" uniqKey="Jonstone R" first="Ron" last="Jonstone">Ron Jonstone</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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