Freshwater ecosystems includes all of the bodies of water that are separated from other bodies of water by land. Because land separates these ecosystems, the species that live in these ecosystems often evolve in isolation from other species in other ecosystems. As a result of that isolation of those species, they often develop a variety of different form and behaviors.
These forms and behaviors of the species that live in freshwater ecosystems tend to be different than those of the species that live in the open ocean, since the environments in which those species lives are different. For instance, changes in the acidity of the water or the appearance of a new predator in a freshwater ecosystem can lead to changes in the species over a period of a few thousands years. The number of different species that live in freshwater ecosystems are not the same across the planet’s freshwater ecosystems, however.
Freshwater Fish and How They Live
For instance, tropical freshwater ecosystems in regions like South America and Asia contains thousands of different species of fish. The reason that these regions contain so many different freshwater species is that the water in these tropical basins is warm and stable. The warm and stable water in these regions allow for the development of a variety of different niches within those ecosystems, and those niches allow for the development of a high number of different species.
In contrast, regions like Europe contains fewer species. However, the species that live in these regions is often adapted to changes in their environment, such as seasonal changes. Because of the diversity of freshwater species, many people chooses to keep fish in their home aquariums.
Some of the fish that people often keep in aquariums include species like Neon Tetras and Guppies, as these species is often considered to be forgiving of the water conditions in aquarium tanks. However, other species of fish, such as Discus fish are more difficult to keep in aquarium tank at home. For instance, Discus fish are sensitive to changes in the chemistry of the water in their tanks.
If the pH of the water in the tank change, the Discus fish may not eat. In this case, the owner of the aquarium must understand the requirement of the Discus fish in order to ensure that the fish will thrive in the owners aquarium tank. The interactions between humans and freshwater fish also includes activities like sport fishing for those fish.
Sport fishing for fish often focuses upon the physical strength of those fish. For instance, different fish use different method to catch their prey. For instance, fish like Pike are ambush predators that will spring upon their prey, while fish like Rainbow Trout leap out of the water to catch their prey.
The physical build of a fish can reveal information about the type of environment in which that fish lives. For instance, fish with torpedo shaped bodies are adapted to travel long distance through open water, while fish with flat bodies are adapted to navigate through thick growth of river weeds. Additionally, some of the strongest freshwater fish, like Gar or Sturgeon fish, have armored plate along their bodies.
These armored plates protect the fish from potential threat. Each of these features of a fish is not random, but based off the evolutionary design of the species to prevent the waste of energy. Fish in freshwater ecosystems exist in different size, ranging from small fish to very large fish species.
For instance, the Beluga Sturgeon can grow to weigh a very large amount of pounds, and is a fish that is much larger than a human being. Additionally, other fish species, such as the Chinese Paddlefish, are best describe as being large in length rather than weight. The body structure of each type of fish is adapted towards the features required of the fish to survive in its environment.
The diet that each type of fish uses is another important factor related to the life of that fish. For instance, many species of freshwater fish are omnivores. Omnivorous fish tend to be easier to take care of in an aquarium tank.
However, some species of fish is specialized in their diets. For instance, filter feeding fish species must be fed a diet of microscopic plankton. These types of diets are difficult to recreate for fish in an aquarium tank, which is why these types of fish is rarely seen in most pet stores.
Thus, the diet of a fish impact the survival of that species, as well as the care that is required of that species to be kept in an aquarium.
