Community-level response of coastal microbial biofilms to ocean acidification in a natural carbon dioxide vent ecosystem

Lidbury, Ian; Johnson, Vivienne R; Hall-Spencer, Jason M.; Munn, Colin B.; Cunliffe, Michael

doi:10.1016/j.marpolbul.2012.02.011

Cited by 81 publications

(75 citation statements)

References 33 publications

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“…Although this represents a form of habitat patchiness, it differs from the patchy mosaic in ambient pH because it consists of only two very simple and depauperate assemblages. This increased dominance of biofilm/filamentous algae, whose production may be enhanced by acidification (42), is likely to have repercussions for higher trophic levels because it lacks much of the 3D structure that serves as habitat for other organisms. Furthermore, it remains to be tested whether the absence of sea urchins in extreme low pH is a result of a physiological intolerance or in response to the changing algal community.…”

Section: Discussionmentioning

confidence: 99%

Community dynamics and ecosystem simplification in a high-CO ₂ ocean

Kroeker

Gambi

Micheli

2013

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

109

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Disturbances are natural features of ecosystems that promote variability in the community and ultimately maintain diversity. Although it is recognized that global change will affect environmental disturbance regimes, our understanding of the community dynamics governing ecosystem recovery and the maintenance of functional diversity in future scenarios is very limited. Here, we use one of the few ecosystems naturally exposed to future scenarios of environmental change to examine disturbance and recovery dynamics. We examine the recovery patterns of marine species from a physical disturbance across different acidification regimes caused by volcanic CO 2 vents. Plots of shallow rocky reef were cleared of all species in areas of ambient, low, and extreme low pH that correspond to near-future and extreme scenarios for ocean acidification. Our results illustrate how acidification decreases the variability of communities, resulting in homogenization and reduced functional diversity at a landscape scale. Whereas the recovery trajectories in ambient pH were highly variable and resulted in a diverse range of assemblages, recovery was more predictable with acidification and consistently resulted in very similar algaldominated assemblages. Furthermore, low pH zones had fewer signs of biological disturbance (primarily sea urchin grazing) and increased recovery rates of the dominant taxa (primarily fleshy algae). Together, our results highlight how environmental change can cause ecosystem simplification via environmentally mediated changes in community dynamics in the near future, with cascading impacts on functional diversity and ecosystem function.carbonate chemistry | habitat patchiness | resilience | emergent effects | species interaction

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Section: Discussionmentioning

confidence: 99%

Community dynamics and ecosystem simplification in a high-CO ₂ ocean

Kroeker

Gambi

Micheli

2013

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

109

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“…Ocean acidification experiments using natural biofilms showed bacterial community shifts, with decreasing relative abundance of Alphaproteobacteria and increasing relative abundance of Flavobacteriales (Witt et al, 2011). Coastal microbial biofilms grown at high CO 2 level also resulted in different community structures compared to those grown at ambient CO 2 level in a natural carbon dioxide vent ecosystem (Lidbury et al, 2012). Ocean acidification also affects the community structure of bacteria associated with corals.…”

Section: Introductionmentioning

confidence: 99%

Interactive network configuration maintains bacterioplankton community structure under elevated CO<sub>2</sub> in a eutrophic coastal mesocosm experiment

Lin¹,

Huang²,

Li³

et al. 2018

Biogeosciences

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Abstract. There is increasing concern about the effects of ocean acidification on marine biogeochemical and ecological processes and the organisms that drive them, including marine bacteria. Here, we examine the effects of elevated CO 2 on the bacterioplankton community during a mesocosm experiment using an artificial phytoplankton community in subtropical, eutrophic coastal waters of Xiamen, southern China. Through sequencing the bacterial 16S rRNA gene V3-V4 region, we found that the bacterioplankton community in this high-nutrient coastal environment was relatively resilient to changes in seawater carbonate chemistry. Based on comparative ecological network analysis, we found that elevated CO 2 hardly altered the network structure of high-abundance bacterioplankton taxa but appeared to reassemble the community network of low abundance taxa. This led to relatively high resilience of the whole bacterioplankton community to the elevated CO 2 level and associated chemical changes. We also observed that the Flavobacteria group, which plays an important role in the microbial carbon pump, showed higher relative abundance under the elevated CO 2 condition during the early stage of the phytoplankton bloom in the mesocosms. Our results provide new insights into how elevated CO 2 may influence bacterioplankton community structure.

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“…Also shown are the number of sequences assigned to each taxonomic order within each treatment and the number of sequences within the four most dominant OTUs within the biofilm clone libraries. probable that biofilm biomass will increase and undergo alterations in species diversity and potentially nutritional value under warming environmental conditions [69]. Temperature-driven increases in metabolic rate of boreal grazers, such as L. littorea, are likely to promote increased grazing rates to maintain 'normal' biological functions in the face of greater metabolic demands.…”

Section: Discussionmentioning

confidence: 99%

Ocean acidification and rising temperatures may increase biofilm primary productivity but decrease grazer consumption

Russell

Connell

Findlay

et al. 2013

Phil. Trans. R. Soc. B

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Climate change may cause ecosystems to become trophically restructured as a result of primary producers and consumers responding differently to increasing CO 2 and temperature. This study used an integrative approach using a controlled microcosm experiment to investigate the combined effects of CO 2 and temperature on key components of the intertidal system in the UK, biofilms and their consumers ( Littorina littorea ). In addition, to identify whether pre-exposure to experimental conditions can alter experimental outcomes we explicitly tested for differential effects on L. littorea pre-exposed to experimental conditions for two weeks and five months. In contrast to predictions based on metabolic theory, the combination of elevated temperature and CO 2 over a five-week period caused a decrease in the amount of primary productivity consumed by grazers, while the abundance of biofilms increased. However, long-term pre-exposure to experimental conditions (five months) altered this effect, with grazing rates in these animals being greater than in animals exposed only for two weeks. We suggest that the structure of future ecosystems may not be predictable using short-term laboratory experiments alone owing to potentially confounding effects of exposure time and effects of being held in an artificial environment over prolonged time periods. A combination of laboratory (physiology responses) and large, long-term experiments (ecosystem responses) may therefore be necessary to adequately predict the complex and interactive effects of climate change as organisms may acclimate to conditions over the longer term.

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Community-level response of coastal microbial biofilms to ocean acidification in a natural carbon dioxide vent ecosystem

Cited by 81 publications

References 33 publications

Community dynamics and ecosystem simplification in a high-CO ₂ ocean

Community dynamics and ecosystem simplification in a high-CO ₂ ocean

Interactive network configuration maintains bacterioplankton community structure under elevated CO<sub>2</sub> in a eutrophic coastal mesocosm experiment

Ocean acidification and rising temperatures may increase biofilm primary productivity but decrease grazer consumption

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Community-level response of coastal microbial biofilms to ocean acidification in a natural carbon dioxide vent ecosystem

Cited by 81 publications

References 33 publications

Community dynamics and ecosystem simplification in a high-CO 2 ocean

Community dynamics and ecosystem simplification in a high-CO 2 ocean

Interactive network configuration maintains bacterioplankton community structure under elevated CO&lt;sub&gt;2&lt;/sub&gt; in a eutrophic coastal mesocosm experiment

Ocean acidification and rising temperatures may increase biofilm primary productivity but decrease grazer consumption

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Community dynamics and ecosystem simplification in a high-CO ₂ ocean

Community dynamics and ecosystem simplification in a high-CO ₂ ocean

Interactive network configuration maintains bacterioplankton community structure under elevated CO<sub>2</sub> in a eutrophic coastal mesocosm experiment