Increased temperature, rather than elevated CO2, modulates the carbon assimilation of the Arctic kelps Saccharina latissima and Laminaria solidungula

Iñíguez, Concepción; Carmona, Raquel; Lorenzo, M. Rosario; Niell, F. Xavier; Wiencke, Christian; Gordillo, Francisco J. L.

doi:10.1007/s00227-016-3024-6

Cited by 36 publications

(32 citation statements)

References 88 publications

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“…References: [1] Ho and Carpenter (); [2] Sarker, Bartsch, Olischläger, Gutow, and Wiencke (); [3] Israel and Hophy (); [4] Gao et al (); [5] Lignell and Pedersén (); [6] García‐Sánchez et al (); [7] Rivers and Peckol (); [8] Chen, Zou, Zhu, and Yang (); [9] Xu, Zou, and Gao (); [10] Liu, Zou, and Yang (); [11] Zou and Gao (); [12] Kang, Kambey, Shen, Yang, and Chung (); [13] Kim et al (); [14] Suárez‐Álvarez, Gómez‐Pinchetti, and García‐Reina (); [15] Bender‐Champ, Diaz‐Pulido, and Dove (); [16] Kübler et al (); [17] Olischläger and Wiencke (); [18] Nunes et al (); [19] Sebök, Herppich, and Hanelt (); [20] Gordillo, Carmona, Viñegla, Wiencke, and Jiménez (); [21] Kram et al (); [22] Israel, Katz, Dubinsky, Merrill, and Friedlander (); [23] Liu and Zou (); [24] Xu, Chen, et al (); [25] Mercado, Javier, Gordillo, Xavier Niell, and Figueroa (); [26] Gao et al (); [27] de Paula Silva, Paul, Nys, and Mata (); [28] Reidenbach et al (); [29] Kang and Chung (); [30] Kang and Kim (); [31] Liu and Zou (); [32] Gao et al (); [33] Xu and Gao (); [34] Li, Xu, and He (); [35] Li, Zhong, Zheng, Zhuo, and Xu (); [36] Björk, Haglund, Ramazanov, and Pedersén (); [37] Gordillo, Niell, and Figueroa (); [38] Rautenberger et al (); [39] Gordillo, Figueroa, and Niell (); [40] Iñiguez et al (); [41] Gordillo et al (); [42] Iñiguez, Heinrich, Harms, and Gordillo (); [43] Gutow et al (); [44] Kawamitsu and Boyer (); [45] Ober and Thornber (); [46] Mensch et al (); [47] Iñiguez et al, (); [48] Fernández et al (); [49] Swanson and Fox (); [50] Thom (); [51] Kang and Chung (); [52] Olischläger, Iñiguez, Koch, Wiencke, and Gordillo (); [53] Zou (); [54] Zo...…”

Section: Resultsmentioning

confidence: 99%

Responses of macroalgae to CO₂ enrichment cannot be inferred solely from their inorganic carbon uptake strategy

Loos

Schmid

Leal

et al. 2018

Ecology and Evolution

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Increased plant biomass is observed in terrestrial systems due to rising levels of atmospheric CO2, but responses of marine macroalgae to CO2 enrichment are unclear. The 200% increase in CO2 by 2100 is predicted to enhance the productivity of fleshy macroalgae that acquire inorganic carbon solely as CO2 (non‐carbon dioxide‐concentrating mechanism [CCM] species—i.e., species without a carbon dioxide‐concentrating mechanism), whereas those that additionally uptake bicarbonate (CCM species) are predicted to respond neutrally or positively depending on their affinity for bicarbonate. Previous studies, however, show that fleshy macroalgae exhibit a broad variety of responses to CO2 enrichment and the underlying mechanisms are largely unknown. This physiological study compared the responses of a CCM species (Lomentaria australis) with a non‐CCM species (Craspedocarpus ramentaceus) to CO2 enrichment with regards to growth, net photosynthesis, and biochemistry. Contrary to expectations, there was no enrichment effect for the non‐CCM species, whereas the CCM species had a twofold greater growth rate, likely driven by a downregulation of the energetically costly CCM(s). This saved energy was invested into new growth rather than storage lipids and fatty acids. In addition, we conducted a comprehensive literature synthesis to examine the extent to which the growth and photosynthetic responses of fleshy macroalgae to elevated CO2 are related to their carbon acquisition strategies. Findings highlight that the responses of macroalgae to CO2 enrichment cannot be inferred solely from their carbon uptake strategy, and targeted physiological experiments on a wider range of species are needed to better predict responses of macroalgae to future oceanic change.

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Section: Resultsmentioning

confidence: 99%

Responses of macroalgae to CO₂ enrichment cannot be inferred solely from their inorganic carbon uptake strategy

Loos

Schmid

Leal

et al. 2018

Ecology and Evolution

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“…Projected increases in CO 2 levels could, theoretically, have a positive effect on future kelp productivity and carbon assimilation (Brodie et al., ), which may compensate for temperature‐meditated declines. In many kelp species however, photosynthesis is already carbon saturated under present conditions, and elevated CO 2 levels do not lead to increased primary production and growth rates (Iñiguez et al., ). In reality, elevated CO 2 levels may facilitate kelp competitors such as mat (turf)‐forming algae (Connell, Kroeker, Fabricius, Kline, & Russell, ), which can displace kelp populations under stressful conditions, such as extreme ocean warming or reduced water quality (Filbee‐Dexter & Wernberg, ).…”

Section: Discussionmentioning

confidence: 99%

Carbon assimilation and transfer through kelp forests in the NE Atlantic is diminished under a warmer ocean climate

Pessarrodona

Moore

Sayer

et al. 2018

Global Change Biology

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Global climate change is affecting carbon cycling by driving changes in primary productivity and rates of carbon fixation, release and storage within Earth's vegetated systems. There is, however, limited understanding of how carbon flow between donor and recipient habitats will respond to climatic changes. Macroalgal‐dominated habitats, such as kelp forests, are gaining recognition as important carbon donors within coastal carbon cycles, yet rates of carbon assimilation and transfer through these habitats are poorly resolved. Here, we investigated the likely impacts of ocean warming on coastal carbon cycling by quantifying rates of carbon assimilation and transfer in Laminaria hyperborea kelp forests—one of the most extensive coastal vegetated habitat types in the NE Atlantic—along a latitudinal temperature gradient. Kelp forests within warm climatic regimes assimilated, on average, more than three times less carbon and donated less than half the amount of particulate carbon compared to those from cold regimes. These patterns were not related to variability in other environmental parameters. Across their wider geographical distribution, plants exhibited reduced sizes toward their warm‐water equatorward range edge, further suggesting that carbon flow is reduced under warmer climates. Overall, we estimated that Laminaria hyperborea forests stored ~11.49 Tg C in living biomass and released particulate carbon at a rate of ~5.71 Tg C year−1. This estimated flow of carbon was markedly higher than reported values for most other marine and terrestrial vegetated habitat types in Europe. Together, our observations suggest that continued warming will diminish the amount of carbon that is assimilated and transported through temperate kelp forests in NE Atlantic, with potential consequences for the coastal carbon cycle. Our findings underline the need to consider climate‐driven changes in the capacity of ecosystems to fix and donate carbon when assessing the impacts of climate change on carbon cycling.

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“…Eukaryotic algal CCMs are usually downregulated at high dissolved CO 2 conditions, decreasing the photosynthetic affinity for inorganic carbon, although CO 2 accumulation can still occur as a low‐affinity mechanism in some species (Amoroso et al , ). Other eukaryotic algae, like some polar phaeophytes, did not show apparent downregulation of their CCMs at the range of dissolved CO 2 tested (Iñiguez et al , , ). In Cyanobacteria, HCO 3 − availability, rather than CO 2 , is the inorganic carbon form that regulates CCM expression (Mayo et al , ).…”

Section: Different Types Of Prokaryotic and Eukaryotic Ccmsmentioning

confidence: 98%

Evolutionary trends in RuBisCO kinetics and their co‐evolution with CO₂ concentrating mechanisms

et al. 2020

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Summary RuBisCO‐catalyzed CO2 fixation is the main source of organic carbon in the biosphere. This enzyme is present in all domains of life in different forms (III, II, and I) and its origin goes back to 3500 Mya, when the atmosphere was anoxygenic. However, the RuBisCO active site also catalyzes oxygenation of ribulose 1,5‐bisphosphate, therefore, the development of oxygenic photosynthesis and the subsequent oxygen‐rich atmosphere promoted the appearance of CO2 concentrating mechanisms (CCMs) and/or the evolution of a more CO2‐specific RuBisCO enzyme. The wide variability in RuBisCO kinetic traits of extant organisms reveals a history of adaptation to the prevailing CO2/O2 concentrations and the thermal environment throughout evolution. Notable differences in the kinetic parameters are found among the different forms of RuBisCO, but the differences are also associated with the presence and type of CCMs within each form, indicative of co‐evolution of RuBisCO and CCMs. Trade‐offs between RuBisCO kinetic traits vary among the RuBisCO forms and also among phylogenetic groups within the same form. These results suggest that different biochemical and structural constraints have operated on each type of RuBisCO during evolution, probably reflecting different environmental selective pressures. In a similar way, variations in carbon isotopic fractionation of the enzyme point to significant differences in its relationship to the CO2 specificity among different RuBisCO forms. A deeper knowledge of the natural variability of RuBisCO catalytic traits and the chemical mechanism of RuBisCO carboxylation and oxygenation reactions raises the possibility of finding unrevealed landscapes in RuBisCO evolution.

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Increased temperature, rather than elevated CO2, modulates the carbon assimilation of the Arctic kelps Saccharina latissima and Laminaria solidungula

Cited by 36 publications

References 88 publications

Responses of macroalgae to CO₂ enrichment cannot be inferred solely from their inorganic carbon uptake strategy

Responses of macroalgae to CO₂ enrichment cannot be inferred solely from their inorganic carbon uptake strategy

Carbon assimilation and transfer through kelp forests in the NE Atlantic is diminished under a warmer ocean climate

Evolutionary trends in RuBisCO kinetics and their co‐evolution with CO₂ concentrating mechanisms

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Increased temperature, rather than elevated CO2, modulates the carbon assimilation of the Arctic kelps Saccharina latissima and Laminaria solidungula

Cited by 36 publications

References 88 publications

Responses of macroalgae to CO2 enrichment cannot be inferred solely from their inorganic carbon uptake strategy

Responses of macroalgae to CO2 enrichment cannot be inferred solely from their inorganic carbon uptake strategy

Carbon assimilation and transfer through kelp forests in the NE Atlantic is diminished under a warmer ocean climate

Evolutionary trends in RuBisCO kinetics and their co‐evolution with CO2 concentrating mechanisms

Contact Info

Product

Resources

About

Responses of macroalgae to CO₂ enrichment cannot be inferred solely from their inorganic carbon uptake strategy

Responses of macroalgae to CO₂ enrichment cannot be inferred solely from their inorganic carbon uptake strategy

Evolutionary trends in RuBisCO kinetics and their co‐evolution with CO₂ concentrating mechanisms