Impact of seawater carbonate chemistry on the calcification of marine bivalves

Biogeosciences, Год журнала: 2015, Номер 12(14), С. 4209 - 4220

Опубликована: Июль 17, 2015

Abstract. Bivalve calcification, particularly of the early larval stages, is highly sensitive to change in ocean carbonate chemistry resulting from atmospheric CO2 uptake. Earlier studies suggested that declining seawater [CO32−] and thereby lowered saturation affect shell production. However, disturbances physiological processes such as acid-base regulation by adverse pCO2 pH can calcification a secondary fashion. In order determine exact system component which growth are affected it necessary utilize more complex manipulations. As single factors, had no effects [HCO3-] only limited on growth, while strongly impacted calcification. Dissolved inorganic carbon (CT) limiting conditions led strong reductions despite high [CO32−], indicating rather than source utilized for mytilid mussels. ratio / [H+] linearly correlated with not possible differentiate between these under natural conditions. An equivalent about 80 μmol kg−1 required saturate supply bivalves. Below this threshold biomineralization rates rapidly decline. A comparison literature data available larvae juvenile mussels oysters originating habitats differing substantially respect prevailing revealed similar response curves. This suggests mechanisms sensitivity group conserved. The higher seems primarily result much relative life stages. reveal understand limit or facilitate adaptation future acidification, better their underlying genetics govern assimilation

Язык: Английский

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Ocean Acidification Increases Copper Toxicity to the Early Life History Stages of the Polychaete Arenicola marina in Artificial Seawater

Environmental Science & Technology, Год журнала: 2014, Номер 48(16), С. 9745 - 9753

Опубликована: Июль 17, 2014

The speciation and therefore bioavailability of the common pollutant copper is predicted to increase within pH range anticipated under near-future ocean acidification (OA), hence potential exists for toxicity marine organisms also increase. We investigated impact OA (seawater values 7.77 (pCO2 1400 μatm) 7.47 3000 μatm)) upon responses in early life history stages polychaete Arenicola marina found both synergistic additive effects combined exposures depending on stage. sperm DNA damage larval survivorship was synergistically increased conditions. Larval survival reduced by 24% when exposed compared single or exposures. Sperm motility negatively affected singularly with two stressors combined. Fertilization success individually, but no as were present this These findings add growing body evidence that will act organisms, which has clear implications coastal benthic ecosystems suffering chronic metal pollution pCO2 levels rise drive a reduction seawater pH.

Язык: Английский

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Impacts of ocean acidification in a warming Mediterranean Sea: An overview

Regional Studies in Marine Science, Год журнала: 2015, Номер 5, С. 1 - 11

Опубликована: Дек. 21, 2015

Язык: Английский

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Interactive effects of multiple stressors in coastal ecosystems

Frontiers in Marine Science, Год журнала: 2025, Номер 11

Опубликована: Янв. 9, 2025

Coastal ecosystems are increasingly experiencing anthropogenic pressures such as climate warming, CO 2 increase, metal and organic pollution, overfishing, resource extraction. Some resulting stressors more direct like pollution fisheries, others indirect ocean acidification, yet they jointly affect marine biota, communities, entire ecosystems. While single-stressor effects have been widely investigated, the interactive of multiple on less researched. In this study, we review literature their in coastal environments across organisms. We classify interactions into three categories: synergistic, additive, antagonistic. found phytoplankton bivalves to be most studied taxonomic groups. Climate warming is identified dominant stressor which, combination, with other eutrophication, exacerbate adverse physiological traits growth rate, fitness, basal respiration, size. Phytoplankton appears sensitive between nutrient pollution. warm nutrient-enriched environments, presence metals considerably affects uptake nutrients, increases respiration costs toxin production phytoplankton. For bivalves, low pH lethal stressors. The combined effect heat stress acidification leads decreased shell size, acid-base regulation capacity bivalves. However, for a holistic understanding how food webs will evolve ongoing changes, suggest research ecosystem-level responses. This can achieved by combining in-situ observations from controlled (e.g. mesocosm experiments) modelling approaches.

Язык: Английский

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An Ecology of Sperm: Sperm Diversification by Natural Selection

Annual Review of Ecology Evolution and Systematics, Год журнала: 2015, Номер 46(1), С. 435 - 459

Опубликована: Окт. 16, 2015

Using basic ecological concepts, we introduce sperm ecology as a framework to study cells. First, describe environmental effects on and conclude that evolutionary research should not neglect the overwhelming evidence presented here (both in external internal fertilizers terrestrial aquatic habitats) function is altered by many environments, including male environment. Second, determine for phenotypic plasticity overwhelming. Third, find genotype-by-environment interaction exist, but their general adaptive significance (e.g., local adaptation) awaits further research. It remains unresolved whether diversification occurs natural selection acting or female microenvironments enable optimal plastic performance of (sperm niches). Environmental reduce fitness predictability under competition, predict species distributions global change, explain behavior, highlight role behavioral reproductive medicine.

Язык: Английский

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Chromosome-Level Genome Assembly of the Blue Mussel Mytilus chilensis Reveals Molecular Signatures Facing the Marine Environment

Genes, Год журнала: 2023, Номер 14(4), С. 876 - 876

Опубликована: Апрель 7, 2023

The blue mussel Mytilus chilensis is an endemic and key socioeconomic species inhabiting the southern coast of Chile. This bivalve supports a booming aquaculture industry, which entirely relies on artificially collected seeds from natural beds that are translocated to diverse physical–chemical ocean farming conditions. Furthermore, production threatened by broad range microorganisms, pollution, environmental stressors eventually impact its survival growth. Herein, understanding genomic basis local adaption pivotal developing sustainable shellfish aquaculture. We present high-quality reference genome M. chilensis, first chromosome-level for Mytilidae member in South America. assembled size was 1.93 Gb, with contig N50 134 Mb. Through Hi-C proximity ligation, 11,868 contigs were clustered, ordered, into 14 chromosomes congruence karyological evidence. comprises 34,530 genes 4795 non-coding RNAs. A total 57% contains repetitive sequences predominancy LTR-retrotransposons unknown elements. Comparative analysis coruscus conducted, revealing genic rearrangements distributed whole genome. Notably, transposable Steamer-like elements associated horizontal transmissible cancer explored genomes, suggesting putative relationships at chromosome level Bivalvia. Genome expression also showing differences between two ecologically different populations. evidence suggests adaptation physiological plasticity can be analyzed develop production. provides molecular knowledge complex.

Язык: Английский

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Intraspecific Variability in the Response of the Edible Mussel Mytilus chilensis (Hupe) to Ocean Acidification

Estuaries and Coasts, Год журнала: 2014, Номер 38(2), С. 590 - 598

Опубликована: Авг. 5, 2014

Язык: Английский

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Mollusks: Tools in Environmental and Climate Research^*

American Malacological Bulletin, Год журнала: 2015, Номер 33(2), С. 310 - 324

Опубликована: Ноя. 12, 2015

Mollusks are among the most diverse and abundant animal groups, inhabiting many aquatic terrestrial environments. They important ecosystem engineers, helping to structure bottom environments providing habitat, protection, food a wide array of other taxa. have been historically humans in ways, today an economically group worldwide. As major calcareous organisms with extensive fossil record, they can provide information on past climate events oceanic changes, thus, increasing our understanding predicted future changes. This paper presents overview use mollusks environmental impact studies, baseline towards wider this ( valuable collections housed museums) as proxies reconstruction, change, ocean warming, acidification research.

Язык: Английский

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Physiological responses to ocean acidification and warming synergistically reduce condition of the common cockle Cerastoderma edule

Marine Environmental Research, Год журнала: 2017, Номер 130, С. 38 - 47

Опубликована: Июль 5, 2017

Язык: Английский

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Dynamic changes in the sperm quality ofMytilus galloprovincialisunder continuous thermal stress

Molecular Reproduction and Development, Год журнала: 2015, Номер 83(2), С. 162 - 173

Опубликована: Дек. 11, 2015

Global warming is an increasingly serious problem underlying ecological change in marine flora and fauna. Mytilus galloprovincialis intertidal species that colonizes coasts moderate warm climates, can thus withstand extreme climatic conditions; however, it successfully reproduces only within a certain temperature range. The effects of prolonged exposure to 28 °C, unsuitable for breeding activity, on sperm quality were evaluated this study. Such heat stress induced the following: significant reduction concentration; biphasic pattern motility mitochondrial membrane potential first increased, then collapsed; decrease intracellular calcium rapid increase lipid peroxidation was normalized after third week stress; DNA fragmentation atypical morphology (i.e., with globular head, asymmetrical tail, acrosome loss). Currently, these elevated-temperature conditions are achieved along Mediterranean coast during late summer, when reproductive activity M. suspended massive spawning spring. increasing global temperature, may shift their season, significantly impacting ecosystems mussel production.

Язык: Английский

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