High resilience of two coastal plankton communities to twenty-first century seawater acidification: Evidence from microcosm studies

Nielsen, Lasse Tor; Jakobsen, Hans Henrik; Hansen, Per Juel

doi:10.1080/17451000903476941

Cited by 65 publications

(55 citation statements)

References 42 publications

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“…Biswas et al, 2012;Engel et al, 2005Engel et al, , 2008Engel et al, , 2014Feng et al, 2010;Hama et al, 2012;Hare et al, 2007;Hopkins et al, 2010;Hopkinson et al, 2010;Hoppe et al, 2013;Kim et al, 2006;Nielsen et al, 2010Nielsen et al, , 2011Richier et al, 2014;Rossoll et al, 2013;Schulz et al, 2008Tatters et al, 2013a, b;Yoshimura et al, 2010Yoshimura et al, , 2013Yoshimura et al, , 2014 vs. nutrientdepleted (e.g. Law et al, 2012;Lomas et al, 2012;Losh et al, 2012)).…”

Section: A J Paul Et Al: Effect Of Elevated Co 2 On Organic Mattermentioning

confidence: 99%

Effect of elevated CO<sub>2</sub> on organic matter pools and fluxes in a summer Baltic Sea plankton community

et al. 2015

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Abstract. Ocean acidification is expected to influence plankton community structure and biogeochemical element cycles. To date, the response of plankton communities to elevated CO 2 has been studied primarily during nutrient-stimulated blooms. In this CO 2 manipulation study, we used largevolume (∼ 55 m 3 ) pelagic in situ mesocosms to enclose a natural summer, post-spring-bloom plankton assemblage in the Baltic Sea to investigate the response of organic matter pools to ocean acidification. The carbonate system in the six mesocosms was manipulated to yield average f CO 2 ranging between 365 and ∼ 1230 µatm with no adjustment of naturally available nutrient concentrations. Plankton community development and key biogeochemical element pools were subsequently followed in this nitrogen-limited ecosystem over a period of 7 weeks. We observed higher sustained chlorophyll a and particulate matter concentrations (∼ 25 % higher) and lower inorganic phosphate concentrations in the water column in the highest f CO 2 treatment (1231 µatm) during the final 2 weeks of the study period (Phase III), when there was low net change in particulate and dissolved matter pools. Size-fractionated phytoplankton pigment analyses indicated that these differences were driven by picophytoplankton (< 2 µm) and were already established early in the experiment during an initial warm and more productive period with overall elevated chlorophyll a and particulate matter concentrations. However, the influence of picophytoplankton on bulk organic matter pools was masked by high biomass of larger plankton until Phase III, when the contribution of the small size fraction (< 2 µm) increased to up to 90 % of chlorophyll a. In this phase, a CO 2 -driven increase in water column particulate carbon did not lead to enhanced sinking material flux but was instead reflected in increased dissolved organic carbon concentrations. Hence ocean acidification may induce changes in organic matter partitioning in the upper water column during the low-nitrogen summer period in the Baltic Sea.

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Section: A J Paul Et Al: Effect Of Elevated Co 2 On Organic Mattermentioning

confidence: 99%

Effect of elevated CO<sub>2</sub> on organic matter pools and fluxes in a summer Baltic Sea plankton community

et al. 2015

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“…On the other hand MZP are known for a direct pH sensitivity (Hinga, 2002;, and a drop in seawater pH as a result of increasing pCO 2 could directly affect the physiology of both autotrophic and heterotrophic protists by changing, e.g. intracellular pH, membrane potentials and enzyme activities (Nielsen et al, 2010).…”

Section: N Aberle Et Al: Tolerance Of Microzooplankton To Ocean Acimentioning

confidence: 99%

High tolerance of microzooplankton to ocean acidification in an Arctic coastal plankton community

et al. 2013

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Impacts of ocean acidification (OA) on marine biota have been observed in a wide range of marine systems. We used a mesocosm approach to study the response of a high Arctic coastal microzooplankton community during the post-bloom period in Kongsfjorden (Svalbard) to direct and indirect effects of high pCO₂/low pH. We found almost no direct effects of OA on microzooplankton composition and diversity. Both the relative shares of ciliates and heterotrophic dinoflagellates as well as the taxonomic composition of microzooplankton remained unaffected by changes in pCO₂/pH. Although the different pCO₂ treatments affected food availability and phytoplankton composition, no indirect effects (e.g. on the total carrying capacity and phenology of microzooplankton) could be observed. Our data point to a high tolerance of this Arctic microzooplankton community to changes in pCO₂/pH. Future studies on the impact of OA on plankton communities should include microzooplankton in order to test whether the observed low sensitivity to OA is typical for coastal communities where changes in seawater pH occur frequently

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“…Most likely, changes in CO 2 availability will affect primary producers directly, although this appears to be highly species dependent and may not be the case for all organisms (Nielsen et al 2010;Gervais and Riebesell 2001;Burkhardt et al 1999;Urabe and Waki 2009;Urabe et al 2003). The high CO 2 availability to primary producers may affect their quality as food for herbivorous consumers, as the increasing carbon availability has the potential to change the balance (stoichiometry) of nutrients in primary producers thus possibly leading to limitations in other essential nutrients, such as nitrogen and phosphorus.…”

Section: Introductionmentioning

confidence: 99%

Increased carbon dioxide availability alters phytoplankton stoichiometry and affects carbon cycling and growth of a marine planktonic herbivore

et al. 2012

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Rising levels of CO 2 in the atmosphere have led to increased CO 2 concentrations in the oceans. This enhanced carbon availability to the marine primary producers has the potential to change their nutrient stoichiometry, and higher carbon-to-nutrient ratios are expected. As a result, the quality of the primary producers as food for herbivores may change. Here, we present experimental work showing the effect of feeding Rhodomonas salina grown under different pCO 2 (200, 400 and 800 latm) on the copepod Acartia tonsa. The rate of development of copepodites decreased with increasing CO 2 availability to the algae. The surplus carbon in the algae was excreted by the copepods, with younger stages (copepodites) excreting most of their surplus carbon through respiration and adult copepods excreting surplus carbon mostly as DOC. We consider the possible consequences of different excretory pathways for the ecosystem. A continued increase in the CO 2 availability for primary production, together with changes in the nutrient loading of coastal ecosystems, may cause changes in the trophic links between primary producers and herbivores.

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High resilience of two coastal plankton communities to twenty-first century seawater acidification: Evidence from microcosm studies

Cited by 65 publications

References 42 publications

Effect of elevated CO<sub>2</sub> on organic matter pools and fluxes in a summer Baltic Sea plankton community

Effect of elevated CO<sub>2</sub> on organic matter pools and fluxes in a summer Baltic Sea plankton community

High tolerance of microzooplankton to ocean acidification in an Arctic coastal plankton community

Increased carbon dioxide availability alters phytoplankton stoichiometry and affects carbon cycling and growth of a marine planktonic herbivore

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High resilience of two coastal plankton communities to twenty-first century seawater acidification: Evidence from microcosm studies

Cited by 65 publications

References 42 publications

Effect of elevated CO&lt;sub&gt;2&lt;/sub&gt; on organic matter pools and fluxes in a summer Baltic Sea plankton community

Effect of elevated CO&lt;sub&gt;2&lt;/sub&gt; on organic matter pools and fluxes in a summer Baltic Sea plankton community

High tolerance of microzooplankton to ocean acidification in an Arctic coastal plankton community

Increased carbon dioxide availability alters phytoplankton stoichiometry and affects carbon cycling and growth of a marine planktonic herbivore

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Effect of elevated CO<sub>2</sub> on organic matter pools and fluxes in a summer Baltic Sea plankton community

Effect of elevated CO<sub>2</sub> on organic matter pools and fluxes in a summer Baltic Sea plankton community