such as "Introduction", "Conclusion"..etc
As mentioned in previous pages, the running water environment offers numerous microhabitats that simulate favourable conditions for many types of animals to successfully succeed the freshwater lotic community. As with plants, animals in this ecosystem have also underwent ongoing evolutionary adaptations to better suit this running water environment.
As with plants and their rooting structure, animals have also adapted to cope with the current of the stream.
Some of these animals are sessile, meaning they are immobile and fixed to the one place. These animals are usually small, and include the protozoans and some freshwater sponges. These animals either remain attached to the mass of a plant or the water bank surface or rock. They usually obtain their food via tentacles which branch out into the flowing water and form a catchment area that can trap microscopic organisms (such as plankton) that is floating downstream.
As much as these sessile animals have developed adaptations to prevent being washed downstream, they are not thought to be one of the important pillars of the freshwater community. Over time when biotic and abiotic factors affect the landscape of the ecosystem over time, the location of these animals may not be as favourable as it once was, and they are unable to correct this due to their immobile nature. With this in light some animals have developed adaptations that allow them to travel through the water without being inhibited in same spot.
animals have developed some of the following adaptations over time that helps them cope with the conditions in hand:
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