The oceans are a very important part of the planet and extend up to approximately 70% of the earth’s surface. In addition to hosting a great biodiversity of organisms, having representatives of almost the majority of existing life forms, more than 90% of the exchanges of goods between countries are transported through their waters. Thus, the oceans and seas are a very important source of natural resources, although not inexhaustible, and many jobs and the economy of many countries depend on it.
If you are passionate about the sea and want to learn more about it, from AgroCorrn we present this article where we focus on explaining what the seabed is, its types, photos and more .
What are the seabed
The littoral seabed forms the sustenance of marine life and presents a considerable extension, reaching from the upper part of the continental shelf with the littoral ecosystem and coastal sand , to the limit of the euphotic zone, a limiting margin where sunlight penetrates. and photosynthetic activity can occur.
Typically, in the few meters of depth, the communities of algae and plants are found, which are of great importance since they are an extraordinary source of oxygen and food.
Types of seabed
How many times have you bathed on the beach and looked at the bottom of the sea looking for one of its inhabitants? As you may have seen, the seabed can vary depending on the area in which you are swimming or diving, as well as if you swim further away or stay on the coast. There are different types of seabed and ocean floor, and each of the different typologies houses different marine ecosystems and a particular oceanic relief. Next, we detail the two different types of seabed that you can find:
They are hard bottoms, resistant to tides and marine currents and that correspond to the underground extension of the earth’s rocky relief. Mollusks , algae , crustaceans , sponges , echinoderms , corals and cnidarians inhabit these bottoms .
They are soft bottoms, less common than the previous ones and typically present in marshes, canyons or estuaries, or in areas of great depth. This type of seabed is usually composed of small and fine materials, such as sand or silt among others. The most representative communities of this type of bottom are the seagrass meadows called Posedonia oceanica , characterized by a high ecological value. In turn, the fixation of these meadows creates habitat for many other species to establish refuges and breeding areas. However, these seagrass meadows are highly sensitive to the impacts of trawling , as well as pollution and the introduction of invasive species and / or pests.
The truth is that there are numerous marine organisms that live anchored on the seabed , most of which have entered the dispute to find a stable place to locate themselves. However, there is hardly any surface of the seabed in which no life is found, and that is that there is an impressive ecosystem of the seabed formed by a gradient of organisms that oscillates according to the temperature of the water, the luminosity that penetrates the waters , the depth of the seabed or the force of the waves, giving rise to a wide variety of ecosystems.
Thus, in the oceans, animals are distributed according to the environmental and social conditions that are most favorable for their life cycle. Some of the species of marine animals that inhabit the seabed are:
- Mud mullet
- Sea spider
- Sea stars
- Cylindrical annelids
- Pocket knives
- Hunter crabs
- Sea acorns
- Sea slugs
- Spider crabs
- Sea oxen
- Sea turtles
If you want to discover more, we encourage you to see these 52 marine animals: characteristics, types and list .
The importance of the seabed
The seabed is of vital importance for marine life, as it provides sustenance for a multitude of species, the presence of which also provides habitat for other marine life. In fact, some deeper sea beds have been compared to tropical forests.
Years ago it was thought that this part of the oceans were simple plains without any life. However, the development of the first submersibles made it easier to submerge to great depths, which provided great discoveries about the seabed and its canyons, plains and seamounts. On the other hand, the seabed plays a key role, since they act as natural barriers against erosion or other phenomena that could alter it.
Therefore, given the immense biodiversity that these regions of the ocean harbor, it is very important to ensure their conservation, as well as to avoid their destruction as much as possible. You may also be interested in reading about the different types of marine biomes in this other AgroCorrn article.
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