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

Lin, Xin; Huang, Rao; Li, Yan; Li, Futian; Wu, Yaping; Hutchins, David A.; Dai, Minhan; Gao, Kunshan

doi:10.5194/bg-15-551-2018

Cited by 11 publications

(21 citation statements)

References 57 publications

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“…In this study, the interactions, mainly positive, among different bacterial species were significantly enhanced at 30 • C (Figure 8), which implied that the enhanced cooperation between different bacterial species with increased positive interactions and more stable network structure may help the whole community to overcome the stress brought by the elevated temperature as indicated in a previous study (Zhang et al, 2020). Previous studies have also shown that bacterial interaction networks were modified by abiotic stresses (Lin et al, 2018;Ratzke et al, 2020). Interestingly, the enhanced interactions in the bacterial community at elevated temperature were more pronounced in attached bacteria compared with freeliving bacteria, which implied that elevated temperatures may have a greater impact on the attached bacterial community.…”

Section: Discussionsupporting

confidence: 72%

Dynamics of Free-Living and Attached Bacterial Assemblages in Skeletonema sp. Diatom Cultures at Elevated Temperatures

et al. 2021

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In the context of global warming, changes in phytoplankton-associated bacterial communities have the potential to change biogeochemical cycling and food webs in marine ecosystems. Skeletonema is a cosmopolitan diatom genus in coastal waters worldwide. Here, we grew a Skeletonema strain with its native bacterial assemblage at different temperatures and examined cell concentrations of Skeletonema sp. and free-living bacteria, dissolved organic carbon (DOC) concentrations of cultures, and the community structure of both free-living and attached bacteria at different culture stages. The results showed that elevated temperature increased the specific growth rates of both Skeletonema and free-living bacteria. Different growth stages had a more pronounced effect on community structure compared with temperatures and different physical states of bacteria. The effects of temperature on the structure of the free-living bacterial community were more pronounced compared with diatom-attached bacteria. Carbon metabolism genes and those for some specific amino acid pathways were found to be positively correlated with elevated temperature, which may have profound implications on the oceanic carbon cycle and the marine microbial loop. Network analysis revealed evidence of enhanced cooperation with an increase in positive interactions among different bacteria at elevated temperature. This may help the whole community to overcome the stress of elevated temperature. We speculate that different bacterial species may build more integrated networks with a modified functional profile of the whole community to cope with elevated temperature. This study contributes to an improved understanding of the response of diatom-associated bacterial communities to elevated temperature.

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Section: Discussionsupporting

confidence: 72%

Dynamics of Free-Living and Attached Bacterial Assemblages in Skeletonema sp. Diatom Cultures at Elevated Temperatures

et al. 2021

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“…An intact speciesrich system would be expected to have greater network complexity due to stable and predictable interactions (Wagg et al, 2014). Our results showed that the sites with very low seawater pH had more complex networks and higher diversity, which indicates that these biofilm communities experienced greater environmental heterogeneity (Lin et al, 2018).…”

Section: Discussionmentioning

confidence: 69%

“…2). Marine bacterioplankton communities also respond to changes in seawater CO2 with changes in community composition, yet the functions of those communities remain resilient to acidification (Lindh et al, 2013;Lin et al, 2018), as predicted by Joint et al (2011).…”

Section: Discussionmentioning

confidence: 98%

Responses of Intertidal Bacterial Biofilm Communities to Increasing pCO2

et al. 2020

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The effects of ocean acidification on ecosystems remain poorly understood, because it is difficult to simulate the effects of elevated CO2 levels on entire marine communities in controlled laboratory conditions. Natural systems such as CO2 seeps that are enriched in CO2 are being used to help understand the long-term effects of ocean acidification in situ. Here, we compared biofilm bacterial community composition on cobbles/boulders and bedrock along a CO2 gradient in the NW Pacific. Samples sequenced for 16S rRNA showed that different bacterial communities were associated with zones of different seawater pCO2, and were also distinct between the two rocky habitat types. In both habitats, there was increased bacterial diversity in the biofilm communities in acidified conditions. Differences in pCO2 were associated with differences in the relative abundance of major bacterial phyla including Cyanobacteria, Bacteroidetes, Proteobacteria, Planctomycetes, and Verrucomicrobia. However, despite the differences in community composition, there is little sign of changes in the bacterial community that would be functionally significant in terms of nutrient cycling and ecosystem structure. As well as direct seawater pH effects, it is possible that increased growth of algae and decreased grazing contributed to the observed shift in bacterial community composition at high CO2, as documented at several seep systems worldwide. Given the importance of biofilms to coastal ecology, changes in their composition due to globally rising pCO2 levels requires further investigation to assess the implications for marine ecosystem function. However, the apparent lack of functional shifts in the biofilms despite the pH change may be a reassuring indicator of stability in shallow oceanic biofilm communities in the future.

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“…This suggests that bacterial communities may be quick to adapt to increases in CO 2 by changing their community composition. However, many studies have also found no significant change in bacterial community composition with elevated CO 2 and therefore, in many communities, bacterial diversity may be resilient to ocean acidification (Lin et al, 2018; Lindh et al, 2013; Oliver, Newbold, Whiteley, & Gast, 2014; Roy et al, 2012; Wang et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Effects of ocean acidification on Antarctic marine organisms: A meta‐analysis

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King

Stark

et al. 2020

Ecology and Evolution

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Southern Ocean waters are among the most vulnerable to ocean acidification. The projected increase in the CO 2 level will cause changes in carbonate chemistry that are likely to be damaging to organisms inhabiting these waters. A meta-analysis was undertaken to examine the vulnerability of Antarctic marine biota occupying waters south of 60°S to ocean acidification. This meta-analysis showed that ocean acidification negatively affects autotrophic organisms, mainly phytoplankton, at CO 2 levels above 1,000 μatm and invertebrates above 1,500 μatm, but positively affects bacterial abundance. The sensitivity of phytoplankton to ocean acidification was influenced by the experimental procedure used. Natural, mixed communities were more sensitive than single species in culture and showed a decline in chlorophyll a concentration, productivity, and photosynthetic health, as well as a shift in community composition at CO 2 levels above 1,000 μatm. Invertebrates showed reduced fertilization rates and increased occurrence of larval abnormalities, as well as decreased calcification rates and increased shell dissolution with any increase in CO 2 level above 1,500 μatm. Assessment of the vulnerability of fish and macroalgae to ocean acidification was limited by the number of studies available. Overall, this analysis indicates that many marine organisms in the Southern Ocean are likely to be susceptible to ocean acidification and thereby likely to change their contribution to ecosystem services in the future. Further studies are required to address the poor spatial coverage, lack of community or ecosystem-level studies, and the largely unknown potential for organisms to acclimate and/or adapt to the changing conditions.

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

Cited by 11 publications

References 57 publications

Dynamics of Free-Living and Attached Bacterial Assemblages in Skeletonema sp. Diatom Cultures at Elevated Temperatures

Dynamics of Free-Living and Attached Bacterial Assemblages in Skeletonema sp. Diatom Cultures at Elevated Temperatures

Responses of Intertidal Bacterial Biofilm Communities to Increasing pCO2

Effects of ocean acidification on Antarctic marine organisms: A meta‐analysis

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