Organic matter release by the dominant primary producers in a Caribbean reef lagoon: Implication for in situ O2 availability

Andreas F. Haas, Carin Jantzen, Malik S. Naumann, Roberto Iglesias-Prieto, Christian Wild

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Coral reef lagoon benthic primary producers may control various processes important for ecosystem functioning, predominately via the release of organic matter, but comparative data are rare. This study therefore comparatively investigated the quantity of particulate and dissolved organic matter released by different benthic primary producers (seagrasses, macroalgae and scleractinian corals) from the coral reef lagoon of Puerto Morelos, Mexican Caribbean. Microbial degradability of the released organic matter was determined along with diurnal in situ measurements of O2 concentrations at lagoon sites dominated by different primary producers. Particulate organic carbon (POC) release was highest for corals (8.2 ± 4.2 mg m-2 h -1), followed by benthic algae (3.9 ± 0.7 mg m-2 h-1) and seagrasses (3.1 ± 2.0 mg m-2 h -1). Dissolved organic carbon (DOC) release rates were highest for seagrasses (15.8 ± 6.0 mg m-2 h-1), followed by algae (1.9 ± 2.0 mg m-2 h-1), whereas corals displayed net DOC uptake. Benthic algae-derived organic matter stimulated planktonic microbial O2 consumption significantly more than seagrass- or coral-derived organic matter. In situ O2 loggers revealed significantly lower average O2 concentrations, particularly during the night, at algae-dominated sites compared to other benthic lagoon environments. This indicates effects of algae-derived organic matter on in situ O2 availability. We therefore suggest that shifts in benthic primary producer dominance affect ecosystem functioning owing to differences in quantity, composition and microbial degradability of the released organic matter.

Original languageEnglish (US)
Pages (from-to)27-39
Number of pages13
JournalMarine Ecology Progress Series
Volume409
DOIs
StatePublished - Jun 23 2010

Fingerprint

algae
reefs
lagoon
soil organic matter
reef
organic matter
alga
coral
corals
dissolved organic carbon
coral reefs
ecosystems
ecosystem
process control
particulate organic carbon
dissolved organic matter
particulate organic matter
seagrass
in situ measurement
macroalgae

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science
  • Ecology

Cite this

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title = "Organic matter release by the dominant primary producers in a Caribbean reef lagoon: Implication for in situ O2 availability",
abstract = "Coral reef lagoon benthic primary producers may control various processes important for ecosystem functioning, predominately via the release of organic matter, but comparative data are rare. This study therefore comparatively investigated the quantity of particulate and dissolved organic matter released by different benthic primary producers (seagrasses, macroalgae and scleractinian corals) from the coral reef lagoon of Puerto Morelos, Mexican Caribbean. Microbial degradability of the released organic matter was determined along with diurnal in situ measurements of O2 concentrations at lagoon sites dominated by different primary producers. Particulate organic carbon (POC) release was highest for corals (8.2 ± 4.2 mg m-2 h -1), followed by benthic algae (3.9 ± 0.7 mg m-2 h-1) and seagrasses (3.1 ± 2.0 mg m-2 h -1). Dissolved organic carbon (DOC) release rates were highest for seagrasses (15.8 ± 6.0 mg m-2 h-1), followed by algae (1.9 ± 2.0 mg m-2 h-1), whereas corals displayed net DOC uptake. Benthic algae-derived organic matter stimulated planktonic microbial O2 consumption significantly more than seagrass- or coral-derived organic matter. In situ O2 loggers revealed significantly lower average O2 concentrations, particularly during the night, at algae-dominated sites compared to other benthic lagoon environments. This indicates effects of algae-derived organic matter on in situ O2 availability. We therefore suggest that shifts in benthic primary producer dominance affect ecosystem functioning owing to differences in quantity, composition and microbial degradability of the released organic matter.",
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Organic matter release by the dominant primary producers in a Caribbean reef lagoon : Implication for in situ O2 availability. / Haas, Andreas F.; Jantzen, Carin; Naumann, Malik S.; Iglesias-Prieto, Roberto; Wild, Christian.

In: Marine Ecology Progress Series, Vol. 409, 23.06.2010, p. 27-39.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Organic matter release by the dominant primary producers in a Caribbean reef lagoon

T2 - Implication for in situ O2 availability

AU - Haas, Andreas F.

AU - Jantzen, Carin

AU - Naumann, Malik S.

AU - Iglesias-Prieto, Roberto

AU - Wild, Christian

PY - 2010/6/23

Y1 - 2010/6/23

N2 - Coral reef lagoon benthic primary producers may control various processes important for ecosystem functioning, predominately via the release of organic matter, but comparative data are rare. This study therefore comparatively investigated the quantity of particulate and dissolved organic matter released by different benthic primary producers (seagrasses, macroalgae and scleractinian corals) from the coral reef lagoon of Puerto Morelos, Mexican Caribbean. Microbial degradability of the released organic matter was determined along with diurnal in situ measurements of O2 concentrations at lagoon sites dominated by different primary producers. Particulate organic carbon (POC) release was highest for corals (8.2 ± 4.2 mg m-2 h -1), followed by benthic algae (3.9 ± 0.7 mg m-2 h-1) and seagrasses (3.1 ± 2.0 mg m-2 h -1). Dissolved organic carbon (DOC) release rates were highest for seagrasses (15.8 ± 6.0 mg m-2 h-1), followed by algae (1.9 ± 2.0 mg m-2 h-1), whereas corals displayed net DOC uptake. Benthic algae-derived organic matter stimulated planktonic microbial O2 consumption significantly more than seagrass- or coral-derived organic matter. In situ O2 loggers revealed significantly lower average O2 concentrations, particularly during the night, at algae-dominated sites compared to other benthic lagoon environments. This indicates effects of algae-derived organic matter on in situ O2 availability. We therefore suggest that shifts in benthic primary producer dominance affect ecosystem functioning owing to differences in quantity, composition and microbial degradability of the released organic matter.

AB - Coral reef lagoon benthic primary producers may control various processes important for ecosystem functioning, predominately via the release of organic matter, but comparative data are rare. This study therefore comparatively investigated the quantity of particulate and dissolved organic matter released by different benthic primary producers (seagrasses, macroalgae and scleractinian corals) from the coral reef lagoon of Puerto Morelos, Mexican Caribbean. Microbial degradability of the released organic matter was determined along with diurnal in situ measurements of O2 concentrations at lagoon sites dominated by different primary producers. Particulate organic carbon (POC) release was highest for corals (8.2 ± 4.2 mg m-2 h -1), followed by benthic algae (3.9 ± 0.7 mg m-2 h-1) and seagrasses (3.1 ± 2.0 mg m-2 h -1). Dissolved organic carbon (DOC) release rates were highest for seagrasses (15.8 ± 6.0 mg m-2 h-1), followed by algae (1.9 ± 2.0 mg m-2 h-1), whereas corals displayed net DOC uptake. Benthic algae-derived organic matter stimulated planktonic microbial O2 consumption significantly more than seagrass- or coral-derived organic matter. In situ O2 loggers revealed significantly lower average O2 concentrations, particularly during the night, at algae-dominated sites compared to other benthic lagoon environments. This indicates effects of algae-derived organic matter on in situ O2 availability. We therefore suggest that shifts in benthic primary producer dominance affect ecosystem functioning owing to differences in quantity, composition and microbial degradability of the released organic matter.

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