Zobrazit v EDS

The Combined Effects of Ocean Acidification and Respiration on Habitat Suitability for Marine Calcifiers Along the West Coast of North America.

Uloženo v:
Podrobná bibliografie
Název: The Combined Effects of Ocean Acidification and Respiration on Habitat Suitability for Marine Calcifiers Along the West Coast of North America.
Autoři: Feely, Richard A., Carter, Brendan R., Alin, Simone R., Greeley, Dana, Bednaršek, Nina
Zdroj: Journal of Geophysical Research. Oceans; Apr2024, Vol. 129 Issue 4, p1-16, 16p
Témata: OCEAN acidification, MARINE habitats, RESPIRATION, ECOLOGICAL impact, OXYGEN consumption, WATER consumption
Geografický termín: NORTH America
Abstrakt: The California Current Ecosystem (CCE) is a natural laboratory for studying the chemical and ecological impacts of ocean acidification. Biogeochemical variability in the region is due primarily to wind-driven near-shore upwelling of cold waters that are rich in re-mineralized carbon and poor in oxygen. The coastal regions are exposed to surface waters with increasing concentrations of anthropogenic CO2 (Canth) from exchanges with the atmosphere and the shoreward transport and mixing of upwelled water. The upwelling drives intense cycling of organic matter that is created through photosynthesis in the surface ocean and degraded through biological respiration in subsurface habitats. We used an extended multiple linear-regression approach to determine the spatial and temporal concentrations of Canth and respired carbon (Cbio) in the CCE based on cruise data from 2007, 2011, 2012, 2013, 2016, and 2021. Over the region, the Canth accumulation rate increased from 0.8 ± 0.1 μmol kg−1 yr−1 in the northern latitudes to 1.1 ± 0.1 μmol kg−1 yr−1 further south. The rates decreased to values of about ∼0.3 μmol kg−1 yr−1 at depths near 300 m. These accumulation rates at the surface correspond to total pH decreases that averaged about 0.002 yr-1; whereas, decreases in aragonite saturation state ranged from 0.006 to 0.011 yr-1. The impact of the Canth uptake was to decrease the amount of oxygen consumption required to cross critical biological thresholds (i.e., calcification, dissolution) for marine calcifiers and are significantly lower in the recent cruises than in the pre-industrial period because of the addition of Canth. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Geophysical Research. Oceans is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Databáze: Complementary Index
Popis
Abstrakt:The California Current Ecosystem (CCE) is a natural laboratory for studying the chemical and ecological impacts of ocean acidification. Biogeochemical variability in the region is due primarily to wind-driven near-shore upwelling of cold waters that are rich in re-mineralized carbon and poor in oxygen. The coastal regions are exposed to surface waters with increasing concentrations of anthropogenic CO<subscript>2</subscript> (C<subscript>anth</subscript>) from exchanges with the atmosphere and the shoreward transport and mixing of upwelled water. The upwelling drives intense cycling of organic matter that is created through photosynthesis in the surface ocean and degraded through biological respiration in subsurface habitats. We used an extended multiple linear-regression approach to determine the spatial and temporal concentrations of C<subscript>anth</subscript> and respired carbon (C<subscript>bio</subscript>) in the CCE based on cruise data from 2007, 2011, 2012, 2013, 2016, and 2021. Over the region, the C<subscript>anth</subscript> accumulation rate increased from 0.8 ± 0.1 μmol kg<sup>−1</sup> yr<sup>−1</sup> in the northern latitudes to 1.1 ± 0.1 μmol kg<sup>−1</sup> yr<sup>−1</sup> further south. The rates decreased to values of about ∼0.3 μmol kg<sup>−1</sup> yr<sup>−1</sup> at depths near 300 m. These accumulation rates at the surface correspond to total pH decreases that averaged about 0.002 yr<sup>-1</sup>; whereas, decreases in aragonite saturation state ranged from 0.006 to 0.011 yr<sup>-1</sup>. The impact of the C<subscript>anth</subscript> uptake was to decrease the amount of oxygen consumption required to cross critical biological thresholds (i.e., calcification, dissolution) for marine calcifiers and are significantly lower in the recent cruises than in the pre-industrial period because of the addition of C<subscript>anth</subscript>. [ABSTRACT FROM AUTHOR]
ISSN:21699275
DOI:10.1029/2023JC019892