Carbon Burial Rates in Sediments and a Carbon Mass Balance for the Herbert River Region of the Great Barrier Reef Continental Shelf, North Queensland, Australia

Brunskill, G. J.; Zagorskis, Irena; Pfitzner, J.

doi:10.1006/ecss.2001.0852

Cited by 71 publications

(55 citation statements)

References 98 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The increase of inorganic C with distance from the shoreline is well described in other areas of the GBR (e.g. Hamilton 2001, Brunskill et al 2002. This increase reflects decreasing importance of terrigeneous (siliceous) sediment.…”

Section: Water and Sediment Qualitysupporting

confidence: 59%

Photosynthetic efficiency and rapid light curves of sediment-biofilms along a water quality gradient in the Great Barrier Reef, Australia

Uthicke¹

2006

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

The use of pulse-amplitude modulated (PAM) fluorometry in situ and in vivo as an indicator for nutrient and light status of microphytobenthos communities was investigated on the Great Barrier Reef. The 10 reefs investigated were located along a previously described water quality gradient, confirmed by sediment chemistry parameters (C org , N) and incident light measurements. Estimates of the efficiency of Photosystem II (PSII) were biased when not corrected for background fluorescence that increased with increasing inorganic C content of the sediments. Uncorrected values mimicked a decline in quantum efficiency towards areas with presumed lower nutrient levels. Upon correction, maximum and effective quantum efficiency (ca. 0.59) did not vary significantly along the gradient. The maximum quantum efficiency (F v /F m,corr ) measured after dark-adaptation did not differ statistically from effective quantum efficiency in the field (φ PSII,corr ). F 0 values measured in the laboratory were much lower than in situ F readings, indicating a higher concentration of biomass on the surface of the sediment in the field. Rapid light curve parameters (initial slope α, relative electron transport rate at light saturation rETR max , irradiance at onset of light saturation E k ) were lower during in vitro readings than in situ. rETR max and α values exhibited no statistical differences along the gradient. In contrast, E k increased towards midshelf reefs and correlated with incident PAR, indicating that microphytobenthos communities were highly adapted to incident light conditions. Because coral reef microphytobenthos was previously shown to be nitrogen limited, it was unexpected that efficiency measurements would not vary. It is hypothesised that, due to potential for differential vertical migration, the actual species involved in photosynthesis at a given time are nutrient sufficient. Higher nutrient supply may change the community composition on the surface to dominance by species with higher productivity. KEY WORDS: PAM · WQ gradient · Benthic microalgae (BMA) · Nutrient limitation · Light limitationResale or republication not permitted without written consent of the publisher

show abstract

Section: Water and Sediment Qualitysupporting

confidence: 59%

Photosynthetic efficiency and rapid light curves of sediment-biofilms along a water quality gradient in the Great Barrier Reef, Australia

Uthicke¹

2006

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

show abstract

“…Our study further provides evidence for the high variability of carbon sequestration in different geomorphologies. Tamandare, Brazil 949 [62] Trat, Thailand Riverine 600 [63] Hinchinbrook Channel, Australia 26 [63] Hinchinbrook Channel, Australia 336 [63] Irian Jaya, Indonesia 412 [63] …”

Section: Carbon Sequestration Rate Comparisonsmentioning

confidence: 99%

Carbon Sequestration and Sedimentation in Mangrove Swamps Influenced by Hydrogeomorphic Conditions and Urbanization in Southwest Florida

Marchio

Savarese

Bovard

et al. 2016

Forests

View full text Add to dashboard Cite

This study compares carbon sequestration rates along two independent tidal mangrove creeks near Naples Bay in Southwest Florida, USA. One tidal creek is hydrologically disturbed due to upstream land use changes; the other is an undisturbed reference creek. Soil cores were collected in basin, fringe, and riverine hydrogeomorphic settings along each of the two tidal creeks and analyzed for bulk density, total organic carbon profiles, and sediment accretion. Radionuclides 137 Cs and 210 Pb were used to estimate recent sediment accretion and carbon sequestration rates.Carbon sequestration rates (mean˘standard error) for seven sites in the two tidal creeks on the Naples Bay (98˘12 g-C m´2¨year´1 (n = 18)) are lower than published global means for mangrove wetlands, but consistent with other estimates from the same region. Mean carbon sequestration rates in the reference riverine setting were highest (162˘5 g-C m´2¨year´1), followed by rates in the reference fringe and disturbed riverine settings (127˘6 and 125˘5 g-C m´2¨year´1, respectively). The disturbed fringe sequestered 73˘10 g-C m´2¨year´1, while rates within the basin settings were 50˘4 g-C m´2¨year´1 and 47˘4 g-C m´2¨year´1 for the reference and disturbed creeks, respectively. These data support our hypothesis that mangroves along a hydrologically disturbed tidal creek sequestered less carbon than did mangroves along an adjacent undisturbed reference creek.

show abstract

“…In order to provide an educated guess, the data from Brunskill et al (2002) suggest that at least in coastal margins, between 60 and 200 g CÁm À2 Áyr À1 (inorganic carbon) may be deposited annually from carbonate skeletons of echinoderms (among other organisms). Globally the shelves' inorganic carbon sedimentation rates are between ;0.06 and 0.2 Pg C/yr using Brunskill et al (2002) data. This is comparable to the ''accumulation'' data (0.17 Pg C/yr) given by Iglesias-Rodriguez et al (2002) from all the neritic areas.…”

Section: Processes In the Sediments And In The Geological Recordmentioning

confidence: 99%

Global contribution of echinoderms to the marine carbon cycle: CaCO₃ budget and benthic compartments

Lebrato

Iglesias-Rodríguez

Feely

et al. 2010

Ecological Monographs

View full text Add to dashboard Cite

Abstract. The contribution of carbonate-producing benthic organisms to the global marine carbon budget has been overlooked, the prevailing view being that calcium carbonate (CaCO 3 ) is predominantly produced and exported by marine plankton in the ''biological pump.'' Here, we provide the first estimation of the global contribution of echinoderms to the marine inorganic and organic carbon cycle, based on organism-level measurements from species of the five echinoderm classes. Echinoderms' global CaCO 3 contribution amounts to ;0.861 Pg CaCO 3 /yr (0.102 Pg C/yr of inorganic carbon) as a production rate, and ;2.11 Pg CaCO 3 (0.25 Pg C of inorganic carbon) as a standing stock from the shelves, slopes, and abyssal depths. Echinoderm inorganic carbon production (0.102 Pg C/yr) is less than the global pelagic production (0.4-1.8 Pg C/yr) and similar to the estimates for carbonate shelves globally (0.024-0.120 Pg C/yr Áyr À1 as inorganic carbon) for the slope on a global scale. The biogeography of the CaCO 3 standing stocks of echinoderms showed strong latitudinal variability. More than 80% of the global CaCO 3 production from echinoderms occurs between 0 and 800 m, with the highest contribution attributed to the shelf and upper slope. We provide a global distribution of echinoderm populations in the context of global calcite saturation horizons, since undersaturated waters with respect to mineral phases are surfacing. This shallowing is a direct consequence of ocean acidification, and in some places it may reach the shelf and upper slope permanently, where the highest CaCO 3 standing stocks from echinoderms originate. These organism-level data contribute substantially to the assessment of global carbonate inventories, which at present are poorly estimated. Additionally, it is desirable to include these benthic compartments in coupled global biogeochemical models representing the ''biological pump'' and its feedbacks, since at present all efforts have focused on pelagic processes, dominated by coccolithophores. The omission of the benthic processes from modeling will only diminish the understanding of elemental fluxes at large scales and any future prediction of climate change scenarios.

show abstract

Carbon Burial Rates in Sediments and a Carbon Mass Balance for the Herbert River Region of the Great Barrier Reef Continental Shelf, North Queensland, Australia

Cited by 71 publications

References 98 publications

Photosynthetic efficiency and rapid light curves of sediment-biofilms along a water quality gradient in the Great Barrier Reef, Australia

Photosynthetic efficiency and rapid light curves of sediment-biofilms along a water quality gradient in the Great Barrier Reef, Australia

Carbon Sequestration and Sedimentation in Mangrove Swamps Influenced by Hydrogeomorphic Conditions and Urbanization in Southwest Florida

Global contribution of echinoderms to the marine carbon cycle: CaCO₃ budget and benthic compartments

Contact Info

Product

Resources

About

Carbon Burial Rates in Sediments and a Carbon Mass Balance for the Herbert River Region of the Great Barrier Reef Continental Shelf, North Queensland, Australia

Cited by 71 publications

References 98 publications

Photosynthetic efficiency and rapid light curves of sediment-biofilms along a water quality gradient in the Great Barrier Reef, Australia

Photosynthetic efficiency and rapid light curves of sediment-biofilms along a water quality gradient in the Great Barrier Reef, Australia

Carbon Sequestration and Sedimentation in Mangrove Swamps Influenced by Hydrogeomorphic Conditions and Urbanization in Southwest Florida

Global contribution of echinoderms to the marine carbon cycle: CaCO3 budget and benthic compartments

Contact Info

Product

Resources

About

Global contribution of echinoderms to the marine carbon cycle: CaCO₃ budget and benthic compartments