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Tiny wonders of the ocean: What are meiobenthos and why are they important?
The ocean's depths hide a fascinating ecosystem, and one of the best-kept secrets is the "meiobenthos," or mesopelagic invertebrates. These small bottom-dwelling organisms are not only numerous, but also play a key role in the entire marine ecosystem. The definition of meiobenthos is determined by size, primarily referring to organisms that are slightly larger than tiny microorganisms (microfauna) but smaller than large animals (macrofauna). Although these organisms are tiny in size, their way of survival and ecological functions are very important.
In one cubic centimeter of sediment, the number of meiobenthos may be as high as several thousand, which shows the richness of its ecosystem in the ocean.
These small organisms include nematodes, copepods, rotifers, tardigrades, and ostracods. In addition, some protozoa such as ciliates and foraminifera are also considered part of meiobenthos. Existing research shows that the existence of meiobenthos is not limited to the ocean, but can also be found in freshwater environments.
The ecological role of meiobenthos
Meiobenthos plays multiple roles in ecosystems, including the circulation of matter and the flow of energy. These small invertebrates feed on organic matter in the sediment and help maintain ecological balance by preying on other tiny organisms. Their activity also promotes the loosening of sediments and enhances soil permeability, thereby helping the circulation of water and nutrients.
Meiobenthos are not only an important link in the marine food chain, but also an indicator of marine health. Their diversity and abundance often reflect the state of the environment.
Survey and sampling methods
The first step in studying meiobenthos is to conduct effective sampling. These tiny creatures typically live in sedimentary environments, from the intertidal zone to the deep sea. A variety of methods can be used to collect samples for different environments. This includes using a dedicated collection device, such as a Van Veen grab sampler, or directly sampling with a bucket and shovel in shallow water.
Extraction technology
When extracting meiobenthos, researchers need to choose the appropriate method based on their research goals. Some organisms will cling to the substrate when disturbed, so an effective extraction method is essential. Common extraction techniques include osmotic shock or the use of anesthetics to dislodge them. In large-scale studies, fixation methods (such as using 10% formalin) are often chosen, followed by further extraction at a later time.
Extraction efficiency is critical to ensuring the accuracy of your study samples, and repeated sampling often improves the overall effectiveness of your extraction.
Meiobenthos and global warming
As the threat of global warming grows, the ecological role and survival of meiobenthos are receiving increasing attention. The study points out that climate change may affect the number and distribution of these organisms, thereby affecting the stability of the entire marine ecosystem. How will these small creatures adapt and continue to survive in the face of an ever-changing environment?
The future of Mayo Clinic
In future research, it is urgent to strengthen the protection awareness of meiobenthos and the supervision of the ecological environment. Understanding the ecological functions and survival needs of these small organisms is not only crucial to promoting the continued health of marine ecosystems, but also helps us better understand the overall changes in the ocean.
Have you ever wondered how these tiny creatures impact our ocean ecosystems and the health of our entire planet?
