Video Experimental Relacionado
Updated: Jul 18, 2025
07:59
Coral Reef Arks: An In Situ Mesocosm and Toolkit for Assembling Reef Communities
Published on: January 6, 2023
3.4K
Los corales constructores de arrecifes se alimentan de sus simbiontes fotosintéticos
Jörg Wiedenmann1, Cecilia D'Angelo2, M Loreto Mardones2
1The Coral Reef Laboratory, Ocean and Earth Science, University of Southampton, Southampton, UK. joerg.wiedenmann@noc.soton.ac.uk.
Nature
|August 23, 2023
Resumen
Los simbiontes de coral pueden suministrar suficiente nitrógeno y fósforo para el rápido crecimiento de los corales. Los corales cultivan a sus simbiontes, digerir el exceso de células para obtener nutrientes esenciales, lo que explica su éxito en aguas pobres en nutrientes.
Área de la Ciencia:
- Biología marina
- Ecología
- La simbiosis
Sus antecedentes:
- Los arrecifes de coral son ecosistemas diversos en aguas pobres en nutrientes (paradoja de Darwin).
- Los anfitriones de coral satisfacen las necesidades de energía a través de la fotosíntesis simbionte de algas.
- Los mecanismos de adquisición de nutrientes (nitrógeno, fósforo) de los simbiontes no están claros.
Objetivo del estudio:
- Investigar la adquisición de nutrientes por los simbiontes de coral.
- Determinar si la absorción de nutrientes por el simbionte sostiene el crecimiento del coral.
- Explique el ciclo de nutrientes y el cultivo de simbiontes en las relaciones entre coral y huésped.
Principales métodos:
- Experimentos de laboratorio a largo plazo sobre el crecimiento de los corales y la absorción de nutrientes.
- Análisis de los presupuestos de nitrógeno y fósforo en huéspedes y simbiontes.
- Experimento natural a gran escala comparando arrecifes con y sin fertilización de aves marinas.
Principales resultados:
- La absorción simbiótica de nitrógeno inorgánico disuelto y fósforo por sí sola apoya el rápido crecimiento de los corales.
- Los corales obtienen nutrientes a través del cultivo de simbiontes y la digestión del exceso de células simbiontes.
- La utilización eficiente de nutrientes por los corales simbióticos mejora el crecimiento a nivel de ecosistema en entornos naturales.
Conclusiones:
- El cultivo de simbiontes es una estrategia clave para la adquisición de nutrientes en los corales.
- Este mecanismo explica el éxito de los corales en entornos marinos limitados en nutrientes.
- Los corales simbióticos aprovechan eficazmente las reservas de nutrientes, mejorando la productividad del arrecife.
Videos de Conceptos Relacionados
01:27Diversity of Protists III
48
Rhizaria are a diverse group of unicellular protists characterized by their threadlike cytoplasmic extensions known as pseudopodia. These structures aid in both locomotion and feeding, giving Rhizaria an amoeboid appearance. Their amoeboid morphology once led to taxonomic confusion, but molecular phylogenetics has clarified their evolutionary placement and emphasized their shared use of pseudopodia despite divergent lineages.This clade comprises diverse lineages such as Chlorarachniophyta,...
48
01:23Red Algae
56
Red algae, also known as rhodophytes, are primarily found in marine environments, though some species inhabit freshwater and terrestrial ecosystems. These organisms exist in both unicellular and multicellular forms, with some multicellular varieties reaching macroscopic sizes.As phototrophic organisms, red algae contain chlorophyll a; however, their chloroplasts lack chlorophyll b. Instead, they possess phycobiliproteins, which serve as major light-harvesting pigments, similar to those found in...
56
01:19Other Algae
46
The group Stramenopiles include some phototrophic microorganisms. Members of this group possess flagella covered in numerous short, hairlike extensions, a feature that inspired the group's name, derived from the Latin words for "straw" and "hair." Some of the main categories of Stramenopiles include diatoms, golden algae, and brown algae.Diatoms are unicellular, photosynthetic eukaryotes, with over 200 known genera. They play a key role in the planktonic communities of both marine and...
46
02:40Epiphytes, Parasites, and Carnivores
13.1K
Plants often form mutualistic relationships with soil-dwelling fungi or bacteria to enhance their roots’ nutrient uptake ability. Root-colonizing fungi (e.g., mycorrhizae) increase a plant’s root surface area, which promotes nutrient absorption. While root-colonizing, nitrogen-fixing bacteria (e.g., rhizobia) convert atmospheric nitrogen (N2) into ammonia (NH3), making nitrogen available to plants for various biological functions. For example, nitrogen is essential for the...
13.1K
01:30Anoxygenic Photosynthesis
50
Anoxygenic photosynthesis is a phototrophic process that captures light energy to drive carbon fixation without producing molecular oxygen. Unlike oxygenic photosynthesis, which utilizes water as an electron donor and releases oxygen, anoxygenic phototrophs use alternative electron donors such as hydrogen sulfide (H₂S), elemental sulfur (S⁰), or thiosulfate (S₂O₃²⁻). This process is carried out by diverse groups of bacteria, including purple bacteria, green...
50
01:27Diversity of Protists II
44
Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...
44