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Apr 14, 2024 · e. Marine microorganisms are defined by their habitat as microorganisms living in a marine environment, that is, in the saltwater of a sea or ocean or the brackish water of a coastal estuary. A microorganism (or microbe) is any microscopic living organism or virus, which is invisibly small to the unaided human eye without magnification.
Apr 1, 2024 · The ocean microbiome is one of the main engines of the biosphere [ 1 ]. A massive number of cells populates it, with global estimates indicating ~ 10 29 prokaryotic cells and ~ 10 30 viruses [ 2, 3 ]. In one milliliter of open ocean water, there are typically 10 3 protists, 10 6 prokaryotes, and 10 7 viruses [ 4 ].
- Ramiro Logares
- ramiro.logares@icm.csic.es
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Apr 9, 2024 · Winds drive ocean currents in the upper 100 meters of the ocean's surface. However, ocean currents also flow thousands of meters below the surface. These deep-ocean currents are driven by differences in the water's density, which is controlled by temperature (thermo) and salinity (haline). This process is known as thermohaline circulation.
5 days ago · A microbiome (from Ancient Greek μικρός (mikrós) 'small', and βίος (bíos) 'life') is the community of microorganisms that can usually be found living together in any given habitat. It was defined more precisely in 1988 by Whipps et al. as "a characteristic microbial community occupying a reasonably well-defined habitat which has ...
- There are some microbiome definitions available that fit several categories with their advantages and disadvantages.
- There is a variety of microbiome definitions available that are driven by the methods applied. Mostly, these definitions rely on DNA sequence-based analysis and describe microbiome as a collective genome of microorganisms in a specific environment. The main bottleneck here is that every new available technology will result in a need for a new definition.
- Definitions based on ecology describe the microbiome following the concepts derived from the ecology of multicellular organisms. The main issue here is that the theories from the macro-ecology do not always fit the rules in the microbial world.
- The host-dependent definitions are based on the microbial interactions with the host. The main gaps here concern the question whether the microbial-host interaction data gained from one host can be transferred to another. The understanding of coevolution and selection in the host-dependent definitions is also underrepresented.
Apr 6, 2024 · Marine protists, single-celled eukaryotic organisms, are formidable predators with diverse feeding strategies. Protozoa and mixotrophs consume a significant portion of carbon produced by algae in the ocean, employing methods such as filtration, engulfment, tube feeding, pallium feeding, and even piston-like mechanisms.
Apr 11, 2024 · marine: Having to do with the ocean world or environment. membrane: A barrier which blocks the passage (or flow through) of some materials depending on their size or other features. Membranes are an integral part of filtration systems. Many serve that same function as the outer covering of cells or organs of a body. microbe: Short for ...
Apr 11, 2024 · Microbial oceanography is the study of the biology, biogeochemistry and ecology of marine microbes, including phytoplankton and zooplankton. There is a particular focus on diversity patterns and ...
