Day 3: The Final Day

Today I decided to focus on the evolutionary parts of these animals. Unlike us, the organisms on this planet seem to adapt to their environments and have genetic mutations that can either help or harm the species.

As I have mentioned before, oxygen levels vary along the river. At the colder areas, there is a higher oxygen level in the freshwater. Since fish require the oxygen because they have gills, higher or lower oxygen levels could be hazardous. However, over time, certain fish, such as trout, have adapted to the higher oxygen levels and can now call the colder areas their home. At the lower oxygen levels, especially at the mouth of the river, sediments make the waters murky. In this case, catfish, carp, and other fish have adapted to both the lower oxygen levels and the unclear waters.

Finally, there is symbiosis in the freshwater rivers and streams. Water lilies provide food and shelter for frogs as they float on the surface of the water; however, the water lilies itself do not benefit from the frogs. This is the type of symbiosis called commensalism.

Kraley, Sara. N.d. Web. 16 Apr. 2014. <http://media.mlive.com/chronicle/living_impact/photo/8647413-large.jpg>.

With this it is clear that the freshwater rivers and streams here on this planet are perfect for our species. We should come here to take it before the humans here ruin such a valuable resource. The places marked in blue are the major locations where freshwater in rivers and streams can be found. I am returning back to our home planet, and I hope that you guys can come to an agreement of action before I touch down.

N.d. Freshwater Info. Web. 16 Apr. 2014. <http://freshwaterinfo.weebly.com/uploads/2/0/3/5/20350991/174913.gif?716>.

Citation:

"Abiotic and Biotic Factors - River Education Program (Luquillo LTER)." Abiotic and Biotic Factors. N.p., n.d. Web. . <https://sites.google.com/a/ites.upr.edu/luquillo-lter/rivers-and-streams/abiotic-and-biotic-factors>.

"Freshwater Animal & Plant Adaptations." Wild Tracks. N.p., n.d. Web. . <http://wildtracks.wordpress.com/world-ecosystems/water-ecosystems-freshwater/freshwater-animal-plant-adaptations/>.

"Freshwater Biome." Animal Facts and Information . N.p., n.d. Web. . <http://bioexpedition.com/freshwater-biome/>.