Annual growth rate of the calcareous red alga Lithothamnion corallioides (Corallinales, Rhodophyta) in the Bay of Brest, France

Potin, Philippe; Floc′h, Jean-Yves; Augris, Claude; Cabioch, J.

doi:10.1007/bf00040243

Cited by 63 publications

(46 citation statements)

References 8 publications

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“…study were generally within the expected range based on previous observations in similar environments, however, in temperate environments, coralline algal growth rates increase with temperature (within a normal seasonal range) such that the highest rates of growth are expected during summer(Potin et al, 1990;Martin et al, 2006). The absence of any definitive seasonal trends in the growth of Hydrolithoideae CCA in the current study, combined with high mortality rates during summer when temperature anomalies were the most pronounced are collectively indicative of thermal stress.…”

supporting

confidence: 84%

Crustose coralline algal growth, calcification and mortality following a marine heatwave in Western Australia

Short

Foster

Falter

et al. 2015

Continental Shelf Research

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supporting

confidence: 84%

Crustose coralline algal growth, calcification and mortality following a marine heatwave in Western Australia

Short

Foster

Falter

et al. 2015

Continental Shelf Research

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“…Assemblage exhibited a strong seasonal pattern for all metabolic parameters, which is consistent with the higher metabolism in the summer for most of the species incubated at the specific scale. This higher metabolism in the summer has already been shown in urchins (Brockington and Peck, 2001), gastropods (Davies, 1966;Innes and Houlihan, 1985;Martin et al, 2006b), and living maerl (Potin et al, 1990;Martin et al, 2006a) and is strongly related to changes in numerous environmental and biological variables, such as light intensity and photoperiod, temperature, and nutrient or food availability (Godbold and Solan, 2013;Thomsen et al, 2013).…”

Section: Discussionsupporting

confidence: 56%

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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“…Direct filtration of the whole alimentary tract digestate was impossible because of the presence of inorganic debris present in black bream alimentary tracts collected in the Bay of Brest (France) that remained intact after digestion (data not shown). These debris consisted mainly of maerl and sand, present in large quantities in the Bay of Brest (Potin et al, 1990); therefore a slightly modified protocol using a sodium tungstate solution (1.5 g/cm 3 ) was tested. This allows the recovery of all plastic particles, including the densest of the "big six": PVC (1.38 g/ cm 3 ) or PET (1.37 g/cm 3 ) (Andrady, 2015); without filtration of the high load of inorganic particles.…”

Section: Experiments 3: Application Of Selected Digestion Protocols Onmentioning

confidence: 99%

Microplastics in seafood: Benchmark protocol for their extraction and characterization

Dehaut

Cassone

Frère

et al. 2016

Environmental Pollution

741

352

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Pollution of the oceans by microplastics (<5 mm) represents a major environmental problem. To date, a limited number of studies have investigated the level of contamination of marine organisms collected in situ. For extraction and characterization of microplastics in biological samples, the crucial step is the identification of solvent(s) or chemical(s) that efficiently dissolve organic matter without degrading plastic polymers for their identification in a time and cost effective way. Most published papers, as well as OSPAR recommendations for the development of a common monitoring protocol for plastic particles in fish and shellfish at the European level, use protocols containing nitric acid to digest the biological tissues, despite reports of polyamide degradation with this chemical. In the present study, six existing approaches were tested and their effects were compared on up to 15 different plastic polymers, as well as their efficiency in digesting biological matrices. Plastic integrity was evaluated through microscopic inspection, weighing, pyrolysis coupled with gas chromatography and mass spectrometry, and Raman spectrometry before and after digestion. Tissues from mussels, crabs and fish were digested before being filtered on glass fibre filters. Digestion efficiency was evaluated through microscopical inspection of the filters and determination of the relative removal of organic matter content after digestion. Five out of the six tested protocols led to significant degradation of plastic particles and/or insufficient tissue digestion. The protocol using a KOH 10% solution and incubation at 60 °C during a 24 h period led to an efficient digestion of biological tissues with no significant degradation on all tested polymers, except for cellulose acetate. This protocol appeared to be the best compromise for extraction and later identification of microplastics in biological samples and should be implemented in further monitoring studies to ensure relevance and comparison of environmental and seafood product quality studies.

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Annual growth rate of the calcareous red alga Lithothamnion corallioides (Corallinales, Rhodophyta) in the Bay of Brest, France

Cited by 63 publications

References 8 publications

Crustose coralline algal growth, calcification and mortality following a marine heatwave in Western Australia

Crustose coralline algal growth, calcification and mortality following a marine heatwave in Western Australia

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

Microplastics in seafood: Benchmark protocol for their extraction and characterization

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