Video Experimental Relacionado
Updated: Jun 26, 2026
10:43
Unraveling the Unseen Players in the Ocean - A Field Guide to Water Chemistry and Marine Microbiology
Published on: November 5, 2014
Contribución de los peces al ciclo del carbono inorgánico marino
R W Wilson1, F J Millero, J R Taylor
1School of Biosciences, University of Exeter, Exeter EX4 4PS, UK. r.w.wilson@ex.ac.uk
Science (New York, N.Y.)
|January 20, 2009
Resumen
Los peces marinos son una fuente importante de la producción de carbonato de calcio oceánico, contribuyendo con el 3-15% del total. Su exclusiva excreción de carbonato puede ayudar a explicar los cambios en la alcalinidad del océano e impactar en el ciclo del carbono.
Área de la Ciencia:
- Biología marina Biología marina.
- Oceanografía La oceanografía es la oceanografía.
- Biogeoquímica La biogeoquímica es la bioquímica.
Sus antecedentes:
- La producción oceánica de carbonato de calcio está tradicionalmente vinculada a organismos planctónicos como los coccolitóforos y las foraminiferas.
- El aumento de la alcalinidad oceánica titulable dentro de los 1000 metros superiores ha sido un rompecabezas controvertido de larga data para los oceanógrafos.
Objetivo del estudio:
- Para investigar el papel de los peces marinos en la producción oceánica de carbonato de calcio.
- Determinar la contribución de los carbonatos derivados del pescado al ciclo del carbono inorgánico y la alcalinidad del océano.
Principales métodos:
- Cuantificación de las tasas de precipitación y excreción de carbonatos en peces marinos.
- Estimando la biomasa mundial de peces para extrapolar la producción de carbonato.
- Analizando la composición química (por ejemplo, contenido de magnesio) y las propiedades de disolución de los carbonatos de pescado.
Principales resultados:
- Se descubrió que los peces marinos producen y excretan carbonatos precipitados de sus intestinos a altas tasas.
- Se estima que los carbonatos derivados del pescado contribuyen en un 3-15% a la producción total de carbonatos oceánicos.
- Los carbonatos de pescado exhiben un mayor contenido y solubilidad de magnesio, lo que lleva a una disolución más rápida con la profundidad, lo que podría explicar hasta el 25% del aumento observado en la alcalinidad titulable.
Conclusiones:
- Los peces marinos representan un contribuyente significativo y no reconocido previamente a la producción oceánica de carbonato de calcio.
- La disolución de carbonato de pescado juega un papel crucial en los presupuestos de alcalinidad del océano y puede resolver un misterio oceanográfico de larga data.
- Los aumentos futuros en el dióxido de carbono oceánico pueden conducir a una mayor producción de carbonato en los peces, lo que influye aún más en el ciclo del carbono inorgánico.
Más Videos Relacionados
07:32Monitoring Pedogenic Inorganic Carbon Accumulation Due to Weathering of Amended Silicate Minerals in Agricultural Soils.
Published on: June 4, 2021
09:45Laboratory Simulation of an Iron(II)-rich Precambrian Marine Upwelling System to Explore the Growth of Photosynthetic Bacteria
Published on: July 24, 2016
Videos de Conceptos Relacionados
01:14The Carbon Cycle
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
01:21The Phosphorus Cycle
Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.
01:22The Sulfur Cycle
Sulfur, an important element in the chemical makeup of proteins, is recycled through the atmosphere and aquatic and terrestrial environments. Found in the atmosphere as sulfur dioxide (SO2), sulfur is released by decaying organisms, weathered rocks, geothermal vents, volcanos, and burning fossil fuels. It is deposited into the ecosystem, cycled through the biotic community, and either released back into the atmosphere as gas or deposited in marine sediment for long-term storage and eventual...
01:24Microbes and Other Elemental Cycles
Microbial activity plays a pivotal role in the biogeochemical cycling of iron and manganese, especially at the redox gradients characteristic of stratified aquatic environments. These cycles are driven by microbial transformations between oxidized and reduced forms of the metals, allowing organisms to exploit them for metabolic energy and structural purposes.Iron Cycling Across Redox GradientsIn neutral, oxygen-rich surface waters, iron is predominantly found in its oxidized, insoluble ferric...
01:24Microbes and the Carbon Cycle
The carbon cycle is a fundamental Earth process involving the transfer of carbon among the biosphere, lithosphere, atmosphere, and hydrosphere. It plays a critical role in regulating the planet’s climate and supporting life by cycling carbon through various chemical forms and reservoirs. Carbon primarily circulates as carbon dioxide (CO₂), representing its oxidized form, while reduced forms such as methane (CH₄) and organic compounds also play essential roles.Microbial activity is central to...
01:15Metabolism of Chemolithotrophs
Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation. However, because inorganic electron donors...