Effects of Ocean Acidification on Population Dynamics and Community Structure of Crustose Coralline Algae

Ordoñez, Alexandra; Doropoulos, Christopher; Díaz-Pulido, Guillermo

doi:10.1086/bblv226n3p255

Cited by 37 publications

(31 citation statements)

References 37 publications

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“…Considering the high Mg content in the skeleton of L. corallioides, increased pCO 2 likely promotes the dissolution of dead thalli. Alternatively, the increase in dissolution observed in the present study may be associated with a reduction of CCA recruitment over the surface of dead thalli under acidified conditions Ordoñez et al, 2014). These results are consistent with the negative response to increased pCO 2 observed here in assemblage G l and G d values, which appeared strongly related to the response of living maerl calcification rates.…”

Section: Net Production Gross Productionsupporting

confidence: 91%

Species interactions can shift the response of a maerl bed community to ocean acidification and warming

et al. 2017

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Abstract. Predicted ocean acidification and warming are likely to have major implications for marine organisms, especially marine calcifiers. However, little information is available on the response of marine benthic communities as a whole to predicted changes. Here, we experimentally examined the combined effects of temperature and partial pressure of carbon dioxide (pCO 2 ) increases on the response of maerl bed assemblages, composed of living and dead thalli of the free-living coralline alga Lithothamnion corallioides, epiphytic fleshy algae, and grazer species. Two 3-month experiments were performed in the winter and summer seasons in mesocosms with four different combinations of pCO 2 (ambient and high pCO 2 ) and temperature (ambient and +3 • C). The response of maerl assemblages was assessed using metabolic measurements at the species and assemblage scales. This study suggests that seasonal variability represents an important driver influencing the magnitude and the direction of species and community response to climate change. Gross primary production and respiration of assemblages was enhanced by high pCO 2 conditions in the summer. This positive effect was attributed to the increase in epiphyte biomass, which benefited from higher CO 2 concentrations for growth and primary production. Conversely, high pCO 2 drastically decreased the calcification rates in assemblages. This response can be attributed to the decline in calcification rates of living L. corallioides due to acidification and increased dissolution of dead L. corallioides. Future changes in pCO 2 and temperature are likely to promote the development of non-calcifying algae to the detriment of the engineer species L. corallioides. The development of fleshy algae may be modulated by the ability of grazers to regulate epiphyte growth. However, our results suggest that predicted changes will negatively affect the metabolism of grazers and potentially their ability to control epiphyte abundance. We show here that the effects of pCO 2 and temperature on maerl bed communities were weakened when these factors were combined. This underlines the importance of examining multifactorial approaches and community-level processes, which integrate species interactions, to better understand the impact of global change on marine ecosystems.

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Section: Net Production Gross Productionsupporting

confidence: 91%

Species interactions can shift the response of a maerl bed community to ocean acidification and warming

et al. 2017

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“…Several of the major space-occupying taxa characteristic of the rocky intertidal zone (mussels, barnacles, coralline algae) are negatively impacted by OA (Kroeker et al, 2013;Kroeker et al, 2014;Ordoñez et al, 2014), which could have significant implications for community succession ( Wootton et al, 2008). Our analysis of the ONP intertidal taxa is consistent with the paradigm that taxa with calcium carbonate structures are more vulnerable to OA than their non-coralline, fleshy algal neighbors (Guinotte and Fabry, 2008;Kroeker et al, 2010).…”

Section: Impacts To Biodiversitysupporting

confidence: 77%

Characterizing the vulnerability of intertidal organisms in Olympic National Park to ocean acidification

Jones

Passow

Fradkin

2018

Elementa: Science of the Anthropocene

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Ocean acidification (OA) will have a predominately negative impact on marine animals sensitive to changes in carbonate chemistry. Coastal upwelling regions, such as the Northwest coast of North America, are likely among the first ecosystems to experience the effects of OA as these areas already experience high pH variability and naturally low pH extremes. Over the past decade, pH off the Olympic coast of Washington has declined an order of magnitude faster than predicted by accepted conservative climate change models. Resource managers are concerned about the potential loss of intertidal biodiversity likely to accompany OA, but as of yet, there are little pH sensitivity data available for the vast majority of taxa found on the Olympic coast. The intertidal zone of Olympic National Park is particularly understudied due to its remote wilderness setting, habitat complexity, and exceptional biodiversity. Recently developed methodological approaches address these challenges in determining organism vulnerability by utilizing experimental evidence and expert opinion. Here, we use such an approach to determine intertidal organism sensitivity to pH for over 700 marine invertebrate and algal species found on the Olympic coast. Our results reinforce OA vulnerability paradigms for intertidal taxa that build structures from calcium carbonate, but also introduce knowledge gaps for many understudied species. We furthermore use our assessment to identify how rocky intertidal communities at four long-term monitoring sites on the Olympic coast could be affected by OA given their community composition. the park's general management plan (NPS, 2007). The 65-mile coastline is a UNESCO Biosphere Reserve and World Heritage Site that hosts one of the most biodiverse assemblages of marine invertebrates and seaweeds along the west coast of North America (Schoch et al., 2006). The intertidal zone is comprised of rocky reefs, sandy beaches, and cobble boulder fields and is valued regionally and nationally for its ecological, economic, and cultural significance. The loss of species in the intertidal zone that rely on a particular pH threshold or the availability of CO 3 2− could fundamentally alter one or all of these interests (Cooley et al., 2009;Lynn et al., 2013) and have resounding reverberations for marine food webs (Gaylord et al., 2015). Over the past decade, ocean pH off the Olympic coast has declined an order of magnitude faster than predicted by accepted conservative climate change models (Feely et al., 2004;Wootton and Pfister, 2012) and has impacted marine aquaculture in the region (Barton et al., 2015). These observations spurred the Governor of Washington to form a Blue Ribbon Panel on Ocean Acidification. The panel's report (Washington Department of Ecology, 2012) recommended expanded pH monitoring and an assessment of marine resource sensitivity to OA. Although OA-associated impacts are documented for several cosmopolitan species, a major limitation for resource managers is determining how those impacts will be experience...

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“…Changes in species composition along natural CO 2 gradients have been observed (Ordoñez et al, 2014) but negative effects on calcification can be mediated by inter-specific interactions (Reyes-Nivia et al, 2014;Short et al, 2014) and acclimatization (Johnson et al, 2014a). There is medium confidence that significant dissolution of living and dead maerl beds will occur, both of which provide important habitat for associated fauna .…”

Section: Updates To Ar5mentioning

confidence: 99%

An updated synthesis of the observed and projected impacts of climate change on the chemical, physical and biological processes in the oceans

et al. 2015

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The 5th Assessment Report (AR5) of the Intergovernmental Panel on Climate Change (IPCC) states with very high certainty that anthropogenic emissions have caused measurable changes in the physical ocean environment. These changes are summarized with special focus on those that are predicted to have the strongest, most direct effects on ocean biological processes; namely, ocean warming and associated phenomena (including stratification and sea level rise) as well as deoxygenation and ocean acidification. The biological effects of these changes are then discussed for microbes (including phytoplankton), plants, animals, warm and cold-water corals, and ecosystems. The IPCC AR5 highlighted several areas related to both the physical and biological processes that required further research. As a rapidly developing field, there have been many pertinent studies published since the cut off dates for the AR5, which have increased our understanding of the processes at work. This study undertook an extensive review of recently published literature to update the findings of the AR5 and provide a synthesized review on the main issues facing future oceans. The level of detail provided in the AR5 and subsequent work provided a basis for constructing projections of the state of ocean ecosystems in 2100 under two the Representative Concentration Pathways RCP4.5 and 8.5. Finally the review highlights notable additions, clarifications and points of departure from AR5 provided by subsequent studies.

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Effects of Ocean Acidification on Population Dynamics and Community Structure of Crustose Coralline Algae

Cited by 37 publications

References 37 publications

Species interactions can shift the response of a maerl bed community to ocean acidification and warming

Species interactions can shift the response of a maerl bed community to ocean acidification and warming

Characterizing the vulnerability of intertidal organisms in Olympic National Park to ocean acidification

An updated synthesis of the observed and projected impacts of climate change on the chemical, physical and biological processes in the oceans

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