Metal concentration and structural changes in Corallina elongata (Corallinales, Rhodophyta) from hydrothermal vents

Couto, Ruben P.; Neto, Ana I.; Rodrigues, Armindo

doi:10.1016/j.marpolbul.2009.11.014

Cited by 19 publications

(13 citation statements)

References 41 publications

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“…The total absence of coralline algae at both study sites, where hydrothermal effects increase acidity, is in accordance with Porzio et al (2011) who reported total absence of calcareous species at mean pH 6.7. Such evidence is a direct result of the destructive effect of pH on the calcareous skeleton of coralline algae as shown by Couto et al (2010), Jokiel et al (2008) and Martin and Gattuso (2009). There is a remarkable resemblance between seaweed community features on the shores here described and those described by Woolsey and Wilkinson (2007), on a shore affected by acid mine drainage in the UK.…”

Section: Discussionsupporting

confidence: 54%

“…Furthermore, the studies by Wallenstein et al (2009) andCouto et al (2010) provide evidence that seaweeds are affected not only at the community level, but also at the structural and cellular levels. It is therefore necessary to evaluate the impacts of pollution at different complementary levels, taking into account factors such as salinity, temperature and pH that affect seaweed growth and reproduction (Phillips 1990).…”

Section: Discussionmentioning

confidence: 99%

“…Intertidal organisms affected by such conditions were first addressed by Wallenstein et al (2009) reporting increased accumulation of some heavy metals in seaweeds collected in the vicinity of hydrothermal venting near the shore, and by Couto et al (2010) who reported effects on the structure of calcareous coralline algae due to hydrothermal conditions. However, there is no record of how intertidal community composition can be affected by hydrothermal activity.…”

Section: Introductionmentioning

confidence: 99%

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Intertidal rocky shore seaweed communities subject to the influence of shallow water hydrothermal activity in São Miguel (Azores, Portugal)

et al. 2012

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The volcanic origin of the Azores archipelago (Portugal) gives rise to active deep sea and shallow water hydrothermal activity that affects benthic communities. Intertidal seaweed surveys were conducted at two shores affected by intense shallow water hydrothermal vents. Water temperature, acidity and salinity were monitored. Seaweed communities were found to be species poor and have a disproportionally larger number of filamentous early successional species on shores that are subject to the effect of hot and acidic freshwater of volcanic origin. There is an ecological resemblance between hydrothermally affected seaweed communities in the Azores and those affected by acid mine drainage in the UK, thus indicating that hydrothermalism can be a useful scenario for pollution studies under conditions of ocean warming and acidification.

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Section: Discussionsupporting

confidence: 54%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Intertidal rocky shore seaweed communities subject to the influence of shallow water hydrothermal activity in São Miguel (Azores, Portugal)

et al. 2012

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“…The opposite trend, with a thickening of the cell wall and increase in cell density, was found in the temperate articulated alga Corallina elongata within a higher temperature, lower pH hydrothermal setting (Couto et al ., ). These contradictory findings may be explained be a product of the peculiar environment of hydrothermal vents.…”

Section: Discussionmentioning

confidence: 99%

“…Coralline algae build their skeleton from high-Mg calcite, the most soluble form of carbonate, being 50% more soluble than calcite and 20% more than aragonite (Busenberg & Plummer, 1989;Feely et al, 2004). This higher solubility of their carbonate thallus may explain why they are absent in naturally acidified waters, such as volcanic vent systems, where other marine calcifiers are able to live and calcify Couto et al, 2010). In addition, at high latitudes, the saturation state is naturally lower, due to the increased uptake of CO 2 into cold waters.…”

Section: Introductionmentioning

confidence: 99%

Ocean acidification weakens the structural integrity of coralline algae

Ragazzola

Foster

Form

et al. 2012

Global Change Biology

144

164

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The uptake of anthropogenic emission of carbon dioxide is resulting in a lowering of the carbonate saturation state and a drop in ocean pH. Understanding how marine calcifying organisms such as coralline algae may acclimatize to ocean acidification is important to understand their survival over the coming century. We present the first long-term perturbation experiment on the cold-water coralline algae, which are important marine calcifiers in the benthic ecosystems particularly at the higher latitudes. Lithothamnion glaciale, after three months incubation, continued to calcify even in undersaturated conditions with a significant trend towards lower growth rates with increasing pCO2 . However, the major changes in the ultra-structure occur by 589 μatm (i.e. in saturated waters). Finite element models of the algae grown at these heightened levels show an increase in the total strain energy of nearly an order of magnitude and an uneven distribution of the stress inside the skeleton when subjected to similar loads as algae grown at ambient levels. This weakening of the structure is likely to reduce the ability of the alga to resist boring by predators and wave energy with severe consequences to the benthic community structure in the immediate future (50 years).

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The carbon turnover response to thermal stress of a dominant coralline alga on the fast warming Levant coast

Guy‐Haim

Silverman

Raddatz

et al. 2016

Limnology & Oceanography

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Marine organisms in the Mediterranean Sea experience the highest temperatures, salinities and oligotrophic conditions in its easternmost part along the eastern shores of the Levantine basin. Over the past three decades this region has warmed by ca. 1.5-3.08C with current winter and summer extremums of 178C and 318C, respectively. In this study, we tested the response of the native abundant articulated coralline red alga Ellisolandia elongata to this warming. Coralline algae play a key role in coastal ecosystems by structuring marine habitats, providing shelter for a myriad of species, and substantially influencing the coastal carbon budget. Despite being ubiquitous along the Levantine coasts, coralline's ecology, physiology, and biogeochemical role are nearly unknown as well as their performance under different temperatures. Measurements of primary production, respiration and calcification in the temperatures range 15-358C, which represent past, present and predicted local annual conditions, indicated two physiological tipping points: 1) metabolic breakdown above 318C; 2) metabolic shift at 238C, possibly promoting seasonal algal heterotrichy (perennation of the alga without its fronds). Annual production rates were evaluated under the current and predicted temperature regimes indicating a loss of ca. one third of the organic carbon and carbonate production by corallines contributed to the shallow Levantine coast in the upcoming decades. We predict that with continued warming, Eastern Mediterranean corallines will experience a westward range contraction, initiating with phenological shifts, followed by performance declines and population decreases, ending with local extinctions.

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Metal concentration and structural changes in Corallina elongata (Corallinales, Rhodophyta) from hydrothermal vents

Cited by 19 publications

References 41 publications

Intertidal rocky shore seaweed communities subject to the influence of shallow water hydrothermal activity in São Miguel (Azores, Portugal)

Intertidal rocky shore seaweed communities subject to the influence of shallow water hydrothermal activity in São Miguel (Azores, Portugal)

Ocean acidification weakens the structural integrity of coralline algae

The carbon turnover response to thermal stress of a dominant coralline alga on the fast warming Levant coast

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