Ocean acidification alters the benthic biofilm communities in intertidal soft sediments
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...
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ftdoajarticles:oai:doaj.org/article:467354d730a749dea18f415331375b58 2023-05-15T17:50:22+02:00 Ocean acidification alters the benthic biofilm communities in intertidal soft sediments Chuan Zhai Yantao Liang Hao Yu Yan Ji Xuechao Chen Min Wang Andrew McMinn 2023-04-01T00:00:00Z https://doi.org/10.3389/fmars.2023.1117826 https://doaj.org/article/467354d730a749dea18f415331375b58 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2023.1117826/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.1117826 https://doaj.org/article/467354d730a749dea18f415331375b58 Frontiers in Marine Science, Vol 10 (2023) ocean acidification biofilms microphytobenthos bacteria intertidal sediments Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2023 ftdoajarticles https://doi.org/10.3389/fmars.2023.1117826 2023-04-09T00:34:38Z 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 ... Article in Journal/Newspaper Ocean acidification Directory of Open Access Journals: DOAJ Articles Frontiers in Marine Science 10 |
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language |
English |
topic |
ocean acidification biofilms microphytobenthos bacteria intertidal sediments Science Q General. Including nature conservation geographical distribution QH1-199.5 |
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ocean acidification biofilms microphytobenthos bacteria intertidal sediments Science Q General. Including nature conservation geographical distribution QH1-199.5 Chuan Zhai Yantao Liang Hao Yu Yan Ji Xuechao Chen Min Wang Andrew McMinn Ocean acidification alters the benthic biofilm communities in intertidal soft sediments |
topic_facet |
ocean acidification biofilms microphytobenthos bacteria intertidal sediments Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
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 ... |
format |
Article in Journal/Newspaper |
author |
Chuan Zhai Yantao Liang Hao Yu Yan Ji Xuechao Chen Min Wang Andrew McMinn |
author_facet |
Chuan Zhai Yantao Liang Hao Yu Yan Ji Xuechao Chen Min Wang Andrew McMinn |
author_sort |
Chuan Zhai |
title |
Ocean acidification alters the benthic biofilm communities in intertidal soft sediments |
title_short |
Ocean acidification alters the benthic biofilm communities in intertidal soft sediments |
title_full |
Ocean acidification alters the benthic biofilm communities in intertidal soft sediments |
title_fullStr |
Ocean acidification alters the benthic biofilm communities in intertidal soft sediments |
title_full_unstemmed |
Ocean acidification alters the benthic biofilm communities in intertidal soft sediments |
title_sort |
ocean acidification alters the benthic biofilm communities in intertidal soft sediments |
publisher |
Frontiers Media S.A. |
publishDate |
2023 |
url |
https://doi.org/10.3389/fmars.2023.1117826 https://doaj.org/article/467354d730a749dea18f415331375b58 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Frontiers in Marine Science, Vol 10 (2023) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2023.1117826/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.1117826 https://doaj.org/article/467354d730a749dea18f415331375b58 |
op_doi |
https://doi.org/10.3389/fmars.2023.1117826 |
container_title |
Frontiers in Marine Science |
container_volume |
10 |
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1766157080751767552 |