scroll to top
Stuck on your essay?
Get ideas from this essay and see how your work stacks up
Word Count: 1,507
Freshwater Regions Freshwater is defined as having a low salt concentrationusually less than 1 Plants and animals in freshwater regions are adjusted to the low salt content and would not be able to survive in areas of high salt concentration ie ocean There are different types of freshwater regions ponds and lakes streams and rivers and wetlands The following sections describe the characteristics of these three freshwater zones Ponds and Lakes These regions range in size from just a few square meters to thousands of square kilometers Scattered throughout the earth several are remnants from the Pleistocene glaciation Many ponds are seasonal lasting just a couple of months such as sessile pools while lakes may exist for hundreds of years or more Ponds and lakes may have limited species diversity since they are often isolated from one another and from other water sources like rivers and oceans Lakes and ponds are divided into three different zones which are usually determined by depth and distance from the shoreline The topmost zone near the shore of a lake or pond is the littoral zone This zone is the warmest since it is shallow and can absorb more of the Suns heat It sustains a fairly diverse community which can include several species of algae like diatoms rooted and floating aquatic plants grazing snails clams insects crustaceans fishes and amphibians In the case of the insects such as dragonflies and midges only the egg and larvae stages are found in this zone The vegetation and animals living in the littoral zone are food for other creatures such as turtles snakes and ducks The near-surface open water surrounded by the littoral zone is the limnetic zone The limnetic zone is well-lighted like the littoral zone and is dominated by plankton both phytoplankton and zooplankton Plankton are small organisms that play a crucial role in the food chain Without aquatic plankton there would be few living organisms
@Kibin is a lifesaver for my essay right now!!
- Sandra Slivka, student @ UC Berkeley
Wow, this is the best essay help I've ever received!
- Camvu Pham, student @ U of M
If I'd known about @Kibin in college, I would have gotten much more sleep
- Jen Soust, alumni @ UCLA