Ocean acidification affects microbial community and invertebrate settlement on biofilms

Nelson, K. S.; Baltar, Federico; Lamare, Miles D.; Morales, Sergio E.

doi:10.1038/s41598-020-60023-4

Cited by 31 publications

(12 citation statements)

References 55 publications

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“…The bacterial community composition in intertidal soft sediments was also significantly altered by OA, consistent with previous findings for bacterial biofilms on intertidal rocks (Taylor et al, 2014;Kerfahi et al, 2020). This shift in bacterial community composition may alter the ecological services provided by biofilms (Nelson et al, 2020). For example, changes in bacterial biofilm composition could modify nutrient cycling and sediment oxygenation, thereby affecting the local micro-environment and resident benthic organisms (discussed more in the section "functional prediction").…”

Section: Biofilm Community Structuresupporting

confidence: 86%

“…Lastly, few studies have assessed how OA affects the functions of microbes in intertidal benthic biofilms (Kerfahi et al, 2020;Sciutteri et al, 2022). Considering the impacts of OA on bacterial community composition in intertidal epilithic biofilms, it is highly likely that OA will also change the ecosystem services (e.g., primary and secondary production, nutrient cycling) provided by those biofilms (Nelson et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Ocean acidification alters the benthic biofilm communities in intertidal soft sediments

et al. 2023

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Microphytobenthos (MPB) and bacterial biofilms play crucial roles in primary and secondary production, nutrient cycling and invertebrate settlement in coastal ecosystems, yet little is known of the effects of ocean acidification (OA) on these communities in intertidal soft sediments. To fill in this gap, a 28-day CO2 enhancement experiment was conducted for the benthic biofilms in soft intertidal sediments (muds and sands) from Qingdao, China. This experiment included three CO2 treatments: 400 ppm CO2 (control), 700 ppm CO2 and 1000 ppm CO2 (IPCC predicted value in 2100), which were established in a three-level CO2 incubator that can adjust the CO2 concentration in the overlying air. The effects of OA on benthic biofilms were assessed in the following three aspects: MPB biomass, biofilm community structure and microbial biogeochemical cycling (e.g., C-cycle, N-cycle and S-cycle). This study found that the 700 ppm CO2 treatment did not significantly affect the benthic biofilms in intertidal soft sediments, but the 1000 ppm CO2 treatment significantly altered the biofilm community composition and potentially their role in microbial biogeochemical cyc\ling in sediments (especially in sandy sediments). For the bacterial community in biofilms, the 1000 ppm CO2 enhancement increased the relative abundance of Alteromonadales and Bacillales but decreased the relative abundance of Rhodobacterales and Flavobacteriales. For microbial biogeochemical cycling, the 1000 ppm CO2 treatment enhanced the potential of chemoheterotrophic activity, nitrate reduction and sulfur respiration in sediments, likely resulting in a more stressful environment (hypoxic and enriched H2S) for most benthic organisms. Even though incubations in this study were only 28 days long and thus couldn’t fully accommodate the range of longer-term adaptions, it still suggests that benthic biofilms in intertidal sandy sediments are likely to change significantly near the end of the century if anthropogenic CO2 emissions unmitigated, with profound implications on local ecosystems and biogeochemical cycling.

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Section: Biofilm Community Structuresupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Ocean acidification alters the benthic biofilm communities in intertidal soft sediments

et al. 2023

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“…Research has continued to focus on mollusks, arthropods and echinoderms, however, cnidarian settlement and metamorphosis (Foster et al, 2015;Olsen et al, 2015;Viyakarn et al, 2015;Fabricius et al, 2017;Yuan et al, 2018), the settlement behavior and swimming activity of a bryozoan (Pecquet et al, 2017), and settlement of an annelid (Nelson et al, 2020) have also been studied. In addition to continuing to assess the impact of elevated CO 2 on the range of behaviors previously studied (above), a few new behaviors have also been investigated.…”

Section: Introductionmentioning

confidence: 99%

Toward a Mechanistic Understanding of Marine Invertebrate Behavior at Elevated CO2

2020

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“…Acidification, on the other hand, has been found to have more direct negative effects across a wider range of phyla and life stages than elevated temperature ( 21 – 23 ) with calcifying larvae being particularly vulnerable to lethal and sublethal responses during development ( 23 , 26 , 57 ). Acidification-induced changes in larval development times, dispersal distances, and shifts in microbial biofilms used as settlement cues for larvae have also been shown to alter recruitment and settlement dynamics ( 58 – 61 ), all of which could have contributed to the diminished richness observed within the Acidified treatment.…”

Section: Discussionmentioning

confidence: 99%

Biodiversity of coral reef cryptobiota shuffles but does not decline under the combined stressors of ocean warming and acidification

Timmers

Jury

Vicente

et al. 2021

Proc. Natl. Acad. Sci. U.S.A.

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Ocean-warming and acidification are predicted to reduce coral reef biodiversity, but the combined effects of these stressors on overall biodiversity are largely unmeasured. Here, we examined the individual and combined effects of elevated temperature (+2 °C) and reduced pH (−0.2 units) on the biodiversity of coral reef communities that developed on standardized sampling units over a 2-y mesocosm experiment. Biodiversity and species composition were measured using amplicon sequencing libraries targeting the cytochrome oxidase I (COI) barcoding gene. Ocean-warming significantly increased species richness relative to present-day control conditions, whereas acidification significantly reduced richness. Contrary to expectations, species richness in the combined future ocean treatment with both warming and acidification was not significantly different from the present-day control treatment. Rather than the predicted collapse of biodiversity under the dual stressors, we find significant changes in the relative abundance but not in the occurrence of species, resulting in a shuffling of coral reef community structure among the highly species-rich cryptobenthic community. The ultimate outcome of altered community structure for coral reef ecosystems will depend on species-specific ecological functions and community interactions. Given that most species on coral reefs are members of the understudied cryptobenthos, holistic research on reef communities is needed to accurately predict diversity–function relationships and ecosystem responses to future climate conditions.

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Ocean acidification affects microbial community and invertebrate settlement on biofilms

Cited by 31 publications

References 55 publications

Ocean acidification alters the benthic biofilm communities in intertidal soft sediments

Ocean acidification alters the benthic biofilm communities in intertidal soft sediments

Toward a Mechanistic Understanding of Marine Invertebrate Behavior at Elevated CO2

Biodiversity of coral reef cryptobiota shuffles but does not decline under the combined stressors of ocean warming and acidification

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