Interactive network configuration maintains bacterioplankton community structure under elevated CO<sub>2</sub> in a eutrophic coastal mesocosm experiment
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<sub>2</sub> on the bacterioplankton community during a mesoc...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2018-01-01
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| Series: | Biogeosciences |
| Online Access: | https://www.biogeosciences.net/15/551/2018/bg-15-551-2018.pdf |
| Summary: | 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<sub>2</sub> 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<sub>2</sub> 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<sub>2</sub> 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<sub>2</sub> condition during the early
stage of the phytoplankton bloom in the mesocosms. Our results provide new
insights into how elevated CO<sub>2</sub> may influence bacterioplankton community
structure. |
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| ISSN: | 1726-4170 1726-4189 |