Sawgrass Lake

On our trip to Sawgrass Lake we learned the differences and similarities of lakes and ponds as an ecosystem. Sawgrass qualifies as a lake because it is larger than 10 acres and size and has freshwater. It is a seepage lake which means it accumulates its water by groundwater and rainwater. There is no other source of flow of water. The only way that water leave the lake is through evaporation. Because this water only has one way out and does not circulate, any material or sediment in the lake has a long-residence time. Even though Sawgrass is freshwater, it has a pH of 6: this is due to the dead leave that fall in the water and they cause the slight acidity. Characterizing the lake as mesotrophic or eutrophic may take a little research because specie variety would need to be identified.

The shoreline was plentiful in emerged vegetation that thrive in the freshwater of the lake. Although there were trees surrounding the shore, there were no mangroves since they thrive in the salt water. Other trees are more adept to this environment and therefore do not allow mangroves to grow. There may be some submerged plants but because of the dark color of the lake it is hard to tell from the surface. However we do know that light will not penetrate very deep resulting in the restriction of photosynthesis. The other obvious plant life was floating plants. They sustain in this environment because they do not need to be attached to a foundation, and can float at the surface to receive the sunlight it needs to photosynthesize. 

This particular lake was threatened and disrupted by pollution from the firing range. This can cause chemical changes in the water that affect the plant and animal life that uses the lake for survival. Luckily the issue was corrected before too much damage was done. 

I look forward to visiting the lake again and to enjoy a stroll on the boardwalk and a visit up to the observatory tower.

  A group of white ibis birds grazing in the shoreline vegetation, 

These birds have adapted to this environment because of their long legs and lightweight bodies, 

they are able to walk effortless in the sunken mud of the lake shoreline. Their beaks also allow them 

to easily poke through the plants and water to feed. 

  

  Floating vegetation provides shelter for small fish and a food source for the birds.

  A soft shell turtle blending in with the floating vegetation.

  A tree that has fallen over exposing the soil and allowing new things to grow that would not have previously. This is referred to as a nurse log. 

  The American Alligator can be found in most lakes where they can hide in the murky water and go unnoticed. 

  A spotted alligator gar resting in the shallows. 

  A beautiful Red-shouldered hawk taking a rest in the shade of the canopy above.