Coral calcification : insights from inorganic experiments and coral responses to environmental variables

Holcomb, Michael

doi:10.1575/1912/3197

Cited by 3 publications

(2 citation statements)

References 75 publications

(142 reference statements)

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“…While it has been established that the reduced concentration of carbonate ions due to ocean acidification increases the energy demand to maintain calcification and growth rates (e.g. Holcomb, 2009; McCulloch et al, 2012), it remains to be determined whether this increase in energy consumption can be compensated for by altered nutrient cycling in corals and an increase in heterotrophy. Concerning the effects of OA on the different processes of N acquisition by corals, it has been shown that higher p CO 2 (partial pressure of carbon dioxide) has no impact on DIN incorporation rates (Godinot et al, 2011) but virtually nothing is known on the effects on DON uptake rates.…”

Section: Introductionmentioning

confidence: 99%

Microbes support enhanced nitrogen requirements of coral holobionts in a high CO₂ environment

et al. 2021

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Ocean acidification is posing a threat to calcifying organisms due to the increased energy requirements of calcification under high CO2 conditions. The ability of scleractinian corals to cope with future ocean conditions will thus depend on their ability to fulfil their carbon requirement. However, the primary productivity of coral holobionts is limited by low nitrogen (N) availability in coral reef waters. Here, we employed CO2 seeps of Tutum Bay (Papua New Guinea) as a natural laboratory to understand how coral holobionts offset their increased energy requirements under high CO2 conditions. Our results demonstrate for the first time that under high pCO2 conditions, N assimilation pathways of Pocillopora damicornis are jointly modified. We found that diazotroph‐derived N assimilation rates in the Symbiodiniaceae were significantly higher in comparison to an ambient CO2 control site, concomitant with a restructured diazotroph community and the specific prevalence of an alpha‐proteobacterium. Further, corals at the high CO2 site also had increased feeding rates on picoplankton and in particular exhibited selective feeding on Synechococcus sp., known to be rich in N. Given the high abundance of picoplankton in oligotrophic waters at large, our results suggest that corals exhibiting flexible diazotrophic communities and capable of exploiting N‐rich picoplankton sources to offset their increased N requirements may be able to cope better in a high pCO2 world.

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Section: Introductionmentioning

confidence: 99%

Microbes support enhanced nitrogen requirements of coral holobionts in a high CO₂ environment

et al. 2021

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“…the granular crystals form at night, whereas the needle-shaped crystals form during the day (Holcomb, 2009). …”

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confidence: 99%

Why Corals Care About Ocean Acidification: Uncovering the Mechanism

Cohen¹,

Holcomb²

2009

Oceanog.

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336

298

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Pacheco-Torgal

Jalali

2011

Eco-Efficient Construction and Building Materials

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Coral calcification : insights from inorganic experiments and coral responses to environmental variables

Cited by 3 publications

References 75 publications

Microbes support enhanced nitrogen requirements of coral holobionts in a high CO₂ environment

Microbes support enhanced nitrogen requirements of coral holobionts in a high CO₂ environment

Why Corals Care About Ocean Acidification: Uncovering the Mechanism

Nanotechnology Achievements

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Coral calcification : insights from inorganic experiments and coral responses to environmental variables

Cited by 3 publications

References 75 publications

Microbes support enhanced nitrogen requirements of coral holobionts in a high CO2 environment

Microbes support enhanced nitrogen requirements of coral holobionts in a high CO2 environment

Why Corals Care About Ocean Acidification: Uncovering the Mechanism

Nanotechnology Achievements

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Product

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About

Microbes support enhanced nitrogen requirements of coral holobionts in a high CO₂ environment

Microbes support enhanced nitrogen requirements of coral holobionts in a high CO₂ environment