GLORIA

GEOMAR Library Ocean Research Information Access

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 2010-2014  (2)
Document type
Keywords
Publisher
Years
Year
  • 1
    facet.materialart.
    Unknown
    Permeable coral reef sediment dissolution driven by elevated pCO2 and pore water advection (2013)
    PANGAEA
    In:  Supplement to: Cyronak, Tyler; Santos, Isaac R; Eyre, Bradley D (2013): Permeable coral reef sediment dissolution driven by elevated pCO2 and pore water advection. Geophysical Research Letters, 40(18), 4876–4881, https://doi.org/10.1002/grl.50948
    Details
    Publication Date: 2024-03-15
    Description: Ocean acidification (OA) is expected to drive the transition of coral reef ecosystems from net calcium carbonate (CaCO3) precipitating to net dissolving within the next century. Although permeable sediments represent the largest reservoir of CaCO3 in coral reefs, the dissolution of shallow CaCO3 sands under future pCO2 levels has not been measured under natural conditions. In situ, advective chamber incubations under elevated pCO2 (~800 µatm) shifted the sediments from net precipitating to net dissolving. Pore water advection more than doubled dissolution rates (1.10 g CaCO3/m**2/day) when compared to diffusive conditions (0.42 g CaCO3/m**2 /day). Sediment dissolution could reduce net ecosystem calcification rates of the Heron Island lagoon by 8% within the next century, which is equivalent to a 25% reduction in the global average calcification rate of coral lagoons. The dissolution of CaCO3 sediments needs to be taken into account in order to address how OA will impact the net accretion of coral reefs under future predicted increases in CO2.
    Keywords: Alkalinity, total; Alkalinity, total, flux; Aragonite saturation state; Benthos; Bicarbonate ion; Bottles or small containers/Aquaria (〈20 L); Calcification/Dissolution; Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Entire community; Field experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Identification; OA-ICC; Ocean Acidification International Coordination Centre; Oxygen, flux; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; Potentiometric; Potentiometric titration; Rocky-shore community; Salinity; South Pacific; Temperature, water; Treatment; Tropical
    Type: Dataset
    Format: text/tab-separated-values, 552 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 2
    facet.materialart.
    Unknown
    Hysteresis between coral reef calcification and the seawater aragonite saturation state (2013)
    PANGAEA
    In:  Supplement to: McMahon, Ashly; Santos, Isaac R; Cyronak, Tyler; Eyre, Bradley D (2013): Hysteresis between coral reef calcification and the seawater aragonite saturation state. Geophysical Research Letters, 40(17), 4675-4679, https://doi.org/10.1002/grl.50802
    Details
    Publication Date: 2024-03-15
    Description: Some predictions of how ocean acidification (OA) will affect coral reefs assume a linear functional relationship between the ambient seawater aragonite saturation state (Omega a) and net ecosystem calcification (NEC). We quantified NEC in a healthy coral reef lagoon in the Great Barrier Reef during different times of the day. Our observations revealed a diel hysteresis pattern in the NEC versus Omega a relationship, with peak NEC rates occurring before the Omega a peak and relatively steady nighttime NEC in spite of variable Omega a. Net ecosystem production had stronger correlations with NEC than light, temperature, nutrients, pH, and Omega a. The observed hysteresis may represent an overlooked challenge for predicting the effects of OA on coral reefs. If widespread, the hysteresis could prevent the use of a linear extrapolation to determine critical Omega a threshold levels required to shift coral reefs from a net calcifying to a net dissolving state.
    Keywords: Alkalinity, total; Alkalinity, total, flux; Ammonium; Aragonite saturation state; Benthos; Bicarbonate ion; Calcification/Dissolution; Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Carbon dioxide, air-sea, flux; Charophyta; Coast and continental shelf; Entire community; Field observation; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Heron_Island; Irradiance; Net calcification rate of calcium carbonate; Net production; Nitrate and Nitrite; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; Phosphate; Potentiometric; Potentiometric titration; Primary production/Photosynthesis; Rocky-shore community; Salinity; South Pacific; Spectrophotometric; Temperate; Temperature, water; Time of day
    Type: Dataset
    Format: text/tab-separated-values, 1204 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...