Effects of Ocean Acidification on Marine Primary Producers and Related Ecological Processes Under Multiple Stressors

Jin, Peng; Gao, Kunshan

doi:10.1007/978-3-030-75602-4_18

Cited by 4 publications

(3 citation statements)

References 169 publications

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“…While we did not observe the effect of summer OA and OW on H. nigripes ' nitrogen content, reduced nutritional value could also be driven by a decrease in fatty acid, lipid, or mineral content (Britton et al, 2020; Zhang et al, 2021). Our feeding assay results only begin to hint at the additional effects that OA and OW may have on macroalgal physiochemical structure, and they reinforce the importance of testing the emergent effects of environmental change on food web interactions (Brown et al, 2014; Jin et al, 2020; Jin & Gao, 2021).…”

Section: Discussionmentioning

confidence: 55%

Season influences interspecific responses of canopy‐forming kelps to future warming and acidification at high latitude

Bell,

Westphal,

O'Brien

et al. 2024

Ecosphere

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Variability in primary producers' responses to environmental change may buffer higher trophic levels against shifts in basal resource composition. Then again, in instances where there is a lack of functional redundancy because consumers rely on a few species to meet their energetic requirements at specific times of the year, altered community production dynamics may significantly impact food web resilience. In high‐latitude kelp forests, a complementary annual phenology of seaweed production supports coastal marine consumers' metabolic needs across large seasonal variations in their environment. Yet, marine consumers in these systems may face significant metabolic stress under the pronounced low pH conditions expected in future winters, particularly if they lack the resources to support their increased energetic demands. In this study, we investigate how the growth and nutritional value of three dominant, coexisting macroalgal species found in subpolar kelp forests will respond to ocean acidification and warming in future winter and summer seasons. We find that the three kelps Macrocystis pyrifera, Hedophyllum nigripes, and Neoagarum fimbriatum differ in their vulnerability to future environmental conditions, and that the seasonal environmental context of nutrient and light availability shapes these responses. Our results suggest that poleward fringe populations of M. pyrifera may be relatively resilient to anticipated ocean warming and acidification. In contrast, ocean warming conditions caused a decrease in the biomass and nutritional quality of both understory kelps. Considering the unique production phenology of H. nigripes, we emphasize that negative impacts on this species in future winters may be of consequence to consumer energetics in this system. This work highlights how interspecific variation in autotrophs' responses to global change can disrupt the diversity and phenological structure of energy supply available to higher trophic levels.

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Section: Discussionmentioning

confidence: 55%

Season influences interspecific responses of canopy‐forming kelps to future warming and acidification at high latitude

Bell,

Westphal,

O'Brien

et al. 2024

Ecosphere

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“…The oceanic CO 2 and heat capture, however, have promoted ocean acidification and deoxygenation (Schmidtko et al 2017 ; Brauko et al 2020 ). This is having detrimental effects on earth’s ecosystem functioning (Henson et al 2017 ; Bates and Johnson 2020 ; Jin and Gao 2021 ; Viitasalo and Bonsdorff 2022 ). Particularly affecting oceanic biodiversity, productivity, and biogeochemical cycling (Brauko et al 2020 ) and consequently impacting the world’s economy.…”

Section: Introductionmentioning

confidence: 99%

Current status of carbon monoxide dehydrogenases (CODH) and their potential for electrochemical applications

Bährle,

Böhnke,

Englhard

et al. 2023

Bioresour. Bioprocess.

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Anthropogenic carbon dioxide (CO2) levels are rising to alarming concentrations in earth’s atmosphere, causing adverse effects and global climate changes. In the last century, innovative research on CO2 reduction using chemical, photochemical, electrochemical and enzymatic approaches has been addressed. In particular, natural CO2 conversion serves as a model for many processes and extensive studies on microbes and enzymes regarding redox reactions involving CO2 have already been conducted. In this review we focus on the enzymatic conversion of CO2 to carbon monoxide (CO) as the chemical conversion downstream of CO production render CO particularly attractive as a key intermediate. We briefly discuss the different currently known natural autotrophic CO2 fixation pathways, focusing on the reversible reaction of CO2, two electrons and protons to CO and water, catalyzed by carbon monoxide dehydrogenases (CODHs). We then move on to classify the different type of CODHs, involved catalyzed chemical reactions and coupled metabolisms. Finally, we discuss applications of CODH enzymes in photochemical and electrochemical cells to harness CO2 from the environment transforming it into commodity chemicals.

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“…Despite the importance of macroalgae to coastal ecosystem functioning (Adey, 1998; due to their role as primary producers and habitat constructors for nearshore benthic communities and to society as food (Schmutter et al, 2017;Bell et al, 2018;Doney et al, 2020), there is a lack of understanding as to how non-calcareous macroalgae with different DIC uptake mechanisms will respond to the impacts of OA Jin & Gao, 2021). While the impacts of OA on calcareous species is comparatively well understood, predicting the impacts of OA on non-calcareous macroalgae is more complex because of the variability in different DIC pumps and quantities of extracellular carbonic anhydrase (exCA), that could influence their sensitivity to seawater CO2 concentrations (Drechsler et al, 1993;Axelsson et al, 1999;Giordano et al, 2005;Fernández et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

The combined effects of ocean acidification, warming and light on Caulerpa spp.: The role of inorganic carbon physiology and species’ ranges

taise

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Caulerpa is a widely distributed genus of chlorophytes (green macroalgae) that is important for its dietary, social, and coastal ecosystem value. Ocean acidification (OA) and ocean warming (OW) both threaten to change the distribution of macroalgae in New Zealand and globally. Two of the most common Caulerpa species in Te Whanganui a Tara Wellington, Aotearoa New Zealand, Caulerpa brownii and C. geminata, could have vastly different responses to both OA and OW because of their divergent dissolved inorganic carbon (DIC) uptake strategies and distance from range edge. However, responses to both stressors of OA and OW could be heavily mediated by light. To address these concerns, I conducted four manipulative laboratory experiments to test the effects of OA, OW and marine heatwaves (MHWs), and light and interactive effects of two or more stressors on Caulerpa species.Responses in physiology and photo-physiology of both Caulerpa species to OA suggest that those macroalgae without a CO2 concentrating mechanism (CCM) and relying solely on diffusive CO2 for DIC will benefit more from OA due to the benefits of alleviation of current DIC limitation than those species which possess a CCM that are not currently DIC limited. Physiological and photo-physiological responses to OA were significantly impacted by irradiance, demonstrating the role of irradiance in mediating DIC physiology in Caulerpa species tested. I found that any benefits received from elevated CO2 under OA may be dependent on energy limitations which in turn affects photo-physiology differentially depending on the DIC uptake strategy operating. Growth and photosynthesis responses of Caulerpa spp., demonstrated that the species with a warm edge distribution in Wellington was more negatively impacted by OW than the species with a cold edge in Wellington, which was more tolerant to OW and MHWs. Exposure to multiple stressors (OA, OW, reduced irradiance) of a future ocean exhibited less severe responses to a combined stressors effect than the singular stressor effects. Overall, my research contributed new knowledge to add to literature about the effects of ocean change on macroalgae with various DIC uptake mechanism and distribution edge positions. The findings here provide evidence that for chlorophytes, especially Caulerpa spp., some species will likely survive under OA in future OW and reduced irradiance conditions in Wellington unless irradiance is further limited. These results suggest a shift in distribution range of Caulerpa spp. in New Zealand can be expected that could potentially change the community structure in these locations.

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Effects of Ocean Acidification on Marine Primary Producers and Related Ecological Processes Under Multiple Stressors

Cited by 4 publications

References 169 publications

Season influences interspecific responses of canopy‐forming kelps to future warming and acidification at high latitude

Season influences interspecific responses of canopy‐forming kelps to future warming and acidification at high latitude

Current status of carbon monoxide dehydrogenases (CODH) and their potential for electrochemical applications

The combined effects of ocean acidification, warming and light on Caulerpa spp.: The role of inorganic carbon physiology and species’ ranges

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