Meridional overturning circulation conveys fast acidification to the deep Atlantic Ocean

Pérez, Fíz F.; Fontela, Marcos; García-Ibáñez, Maribel I.; Mercier, Herlé; Velo, A.; Lherminier, Pascale; Zunino, Patricia; Paz, M. de la; Alonso-Pérez, Fernando; Guallart, Elisa F.; Pad́ın, X. A.

doi:10.1038/nature25493

Cited by 74 publications

(80 citation statements)

References 43 publications

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“…Among deep‐sea VME indicators, cold‐water corals that form important biogenic habitats are known to be vulnerable to anthropogenic climate change, particularly to ocean acidification (FAO, ; Guinotte et al, ; Orr et al, ; Perez et al, ; Roberts et al, ; Tittensor, Baco, Hall‐Spencer, Orr, & Rogers, ). This vulnerability exists because most cold‐water corals with carbonate skeletons occur in waters supersaturated in carbonate that enable coral skeleton biocalcification.…”

Section: Introductionmentioning

confidence: 99%

“…& Gattuso, 2019; Movilla et al, 2014), the projected shoaling of the calcite and aragonite saturation horizons along with warming is expected to lead to the loss of suitable habitat (Davies & Guinotte, 2011;Perez et al, 2018;Sulpis et al, 2018;Tittensor et al, 2010;Yesson et al, 2012), weakening of the reef frameworks that may result in structural collapse of slow-growing scleractinian corals (Büscher et al, 2019;Gomez, Wickes, Deegan, Etnoyer, & Cordes, 2019;Hennige et al, 2015), and increased mortality of octocorals that form coral gardens (Cerrano et al, 2013;Gugliotti, DeLorenzo, & Etnoyer, 2019). Notwithstanding genotypic variability in cold-water corals' response to ocean acidification (Kurman, Gómez, Georgian, Lunden, & Cordes, 2017;Lunden, McNicholl, Sears, Morrison, & Cordes, 2014), these changes may result in the loss of biodiversity and provision of ecosystem services associated with these ecosystems .…”

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confidence: 99%

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Climate‐induced changes in the suitable habitat of cold‐water corals and commercially important deep‐sea fishes in the North Atlantic

Morato

González-Irusta

Domínguez-Carrió

et al. 2020

Global Change Biology

136

139

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The deep sea plays a critical role in global climate regulation through uptake and storage of heat and carbon dioxide. However, this regulating service causes warming, acidification and deoxygenation of deep waters, leading to decreased food availability at the seafloor. These changes and their projections are likely to affect productivity, biodiversity and distributions of deep‐sea fauna, thereby compromising key ecosystem services. Understanding how climate change can lead to shifts in deep‐sea species distributions is critically important in developing management measures. We used environmental niche modelling along with the best available species occurrence data and environmental parameters to model habitat suitability for key cold‐water coral and commercially important deep‐sea fish species under present‐day (1951–2000) environmental conditions and to project changes under severe, high emissions future (2081–2100) climate projections (RCP8.5 scenario) for the North Atlantic Ocean. Our models projected a decrease of 28%–100% in suitable habitat for cold‐water corals and a shift in suitable habitat for deep‐sea fishes of 2.0°–9.9° towards higher latitudes. The largest reductions in suitable habitat were projected for the scleractinian coral Lophelia pertusa and the octocoral Paragorgia arborea, with declines of at least 79% and 99% respectively. We projected the expansion of suitable habitat by 2100 only for the fishes Helicolenus dactylopterus and Sebastes mentella (20%–30%), mostly through northern latitudinal range expansion. Our results projected limited climate refugia locations in the North Atlantic by 2100 for scleractinian corals (30%–42% of present‐day suitable habitat), even smaller refugia locations for the octocorals Acanella arbuscula and Acanthogorgia armata (6%–14%), and almost no refugia for P. arborea. Our results emphasize the need to understand how anticipated climate change will affect the distribution of deep‐sea species including commercially important fishes and foundation species, and highlight the importance of identifying and preserving climate refugia for a range of area‐based planning and management tools.

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Climate‐induced changes in the suitable habitat of cold‐water corals and commercially important deep‐sea fishes in the North Atlantic

Morato

González-Irusta

Domínguez-Carrió

et al. 2020

Global Change Biology

136

139

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“…The anthropogenic CO 2 invasion has resulted in 0.1 unit decrease in pH in the surface ocean globally since the industrial revolution and an additional decline of 0.2–0.4 pH unit is expected by the end of this century (Orr et al, ). The uptake of anthropogenic CO 2 also resulted in an increase of seawater acidity in the ocean interior (Sabine et al, ) and the shoaling of the calcium carbonate saturation horizons (Feely et al, ; Perez et al, ). Ocean acidification has a negative impact on marine calcifying organisms (Doney, ; Guinotte & Fabry, ; Orr et al, ; Waldbusser et al, ) and also represents a potential global threat to the health of marine ecosystems (Fabry et al, ; Hutchins et al, ; Kroeker et al, ; Pan et al, ; Sunday et al, ).…”

Section: Introductionmentioning

confidence: 99%

Physical and Biogeochemical Controls on pH Dynamics in the Northern Gulf of Mexico During Summer Hypoxia

et al. 2019

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High‐accuracy spectrophotometric pH measurements were taken during a summer cruise to study the pH dynamics and its controlling mechanisms in the northern Gulf of Mexico in hypoxia season. Using the recently available dissociation constants of the purified m‐cresol purple (Douglas & Byrne, 2017, https://doi.org/10.1016/j.marchem.2017.10.001; Müller & Rehder, 2018, https://doi.org/10.3389/fmars.2018.00177), spectrophotometrically measured pH showed excellent agreement with pH calculated from dissolved inorganic carbon (DIC) and total alkalinity over a wide salinity range of 0 to 36.9 (0.005 ± 0.016, n = 550). The coupled changes in DIC, oxygen, and nutrients suggest that biological production of organic matter in surface water and the subsequent aerobic respiration in subsurface was the dominant factor regulating pH variability in the nGOM in summer. The highest pH values were observed, together with the maximal biological uptake of DIC and nutrients, at intermediate salinities in the Mississippi and Atchafalaya plumes where light and nutrient conditions were favorable for phytoplankton growth. The lowest pH values (down to 7.59) were observed along with the highest concentrations of DIC and apparent oxygen utilization in hypoxic bottom waters. The nonconservative pH changes in both surface and bottom waters correlated well with the biologically induced changes in DIC, that is, per 100‐μmol/kg biological removal/addition of DIC resulted in 0.21 unit increase/decrease in pH. Coastal bottom water with lower pH buffering capacity is more susceptible to acidification from anthropogenic CO2 invasion but reduction in eutrophication may offset some of the increased susceptibility to acidification.

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“…However, the NW Iberian margin is characterized by well ventilated waters, high oxygen, and sediments with relatively low organic carbon content, in comparison to the other main coastal upwelling areas (Castro et al, , ). A recent paper by Perez et al () shows that aragonite saturation at proximally 300‐m water depth is >75 μmol kg −1 at the Portuguese margin stations of the Ovide transect. For that reason, we have a good aragonite preservation and assume that dissolution will be not an important issue for calcite for this very shallow coastal upwelling region.…”

Section: Discussionmentioning

confidence: 95%

“…upwelling areas (Castro et al, 2000(Castro et al, , 2006. A recent paper by Perez et al (2018) shows that aragonite saturation at proximally 300-m water depth is >75 μmol kg −1 at the Portuguese margin stations of the Ovide transect. For that reason, we have a good aragonite preservation and assume that dissolution will be not an important issue for calcite for this very shallow coastal upwelling region.…”

Section: Paleoceanography and Paleoclimatologymentioning

confidence: 94%

δ¹⁸O and Mg/Ca Thermometry in Planktonic Foraminifera: A Multiproxy Approach Toward Tracing Coastal Upwelling Dynamics

Salgueiro

Voelker

Martin

et al. 2020

Paleoceanog and Paleoclimatol

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Planktonic foraminifera δ18O and Mg/Ca ratios are widely considered as a powerful proxy to reconstruct past seawater‐column temperature. Due to the complex interpretation of planktonic foraminifera δ18O data in regard to past seawater temperatures, temperature determination based on the foraminifera shell Mg/Ca ratio is believed to be more accurate. Scarce Mg/Ca calibration data exists for coastal upwelling regions, resulting in incoherent results of past seawater reconstructions. The current study along the NW Iberia coastal upwelling system intends to define the best Mg/Ca temperature equation for the most representative species of this region (Neogloboquadrina incompta, Globigerina bulloides, and Globorotalia inflata). Seawater temperature from δ18O and Mg/Ca of these three planktonic foraminifera species was compared with the surface sediments alkenone derived SST and with the in situ temperatures measured at the depths where these foraminifera species currently live and calcify. The equations that better reflect each species calcification depth were selected as our regional equations for δ18O and Mg/Ca temperature reconstructions. The δ18O‐estimated temperatures for surface sediment specimens were comparable with in situ seawater‐column temperature measurements, whereas the Mg/Ca derived temperatures seem to underestimate in situ values, in special for G. bulloides from samples affected by stronger coastal upwelling. The G. bulloides δ18O and Mg/Ca estimated temperatures from samples located offshore, further from coastal upwelling influence, are comparable to surface sediment alkenone derived temperatures. Our study shows that in upwelling areas, regional calibration of planktonic foraminifera Mg/Ca temperature equations is necessary for reliable interpretations of high‐resolution past temperature variability in these important environments.

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Meridional overturning circulation conveys fast acidification to the deep Atlantic Ocean

Cited by 74 publications

References 43 publications

Climate‐induced changes in the suitable habitat of cold‐water corals and commercially important deep‐sea fishes in the North Atlantic

Climate‐induced changes in the suitable habitat of cold‐water corals and commercially important deep‐sea fishes in the North Atlantic

Physical and Biogeochemical Controls on pH Dynamics in the Northern Gulf of Mexico During Summer Hypoxia

δ¹⁸O and Mg/Ca Thermometry in Planktonic Foraminifera: A Multiproxy Approach Toward Tracing Coastal Upwelling Dynamics

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Meridional overturning circulation conveys fast acidification to the deep Atlantic Ocean

Cited by 74 publications

References 43 publications

Climate‐induced changes in the suitable habitat of cold‐water corals and commercially important deep‐sea fishes in the North Atlantic

Climate‐induced changes in the suitable habitat of cold‐water corals and commercially important deep‐sea fishes in the North Atlantic

Physical and Biogeochemical Controls on pH Dynamics in the Northern Gulf of Mexico During Summer Hypoxia

δ18O and Mg/Ca Thermometry in Planktonic Foraminifera: A Multiproxy Approach Toward Tracing Coastal Upwelling Dynamics

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Product

Resources

About

δ¹⁸O and Mg/Ca Thermometry in Planktonic Foraminifera: A Multiproxy Approach Toward Tracing Coastal Upwelling Dynamics