Rivers & Streams
What is a Euphotic Zone?
An area of water that gets some sunlight and can support a variety of species
Name one role lakes play in the economy
drinking water, recreation, industry
Bird building a nest is an example of which type of adaptation?
behavioral
The area of the lake away from shore, open water called
Limnetic Zone
Most rivers in Texas are controlled by
Dams
During heavy rains vegetation along the banks can help reduce ___________________
Erosion
What are two difference between lakes and ponds
small, light penetration, depth
What is an example of an adaptation of organisms living in fast flowing water?
long flexible stems
streamline bodies
burrow in the sand
The area at the bottom of the lake where bacteria and other decomposers is called
Benthic Zone
Why are plants important to stream health
A source of pollution
Increase erosion
Regulate temperature by providing shade
Decrease dissolved oxygen
The deepest part of a stream is called the...
What is the channel
What is the base for a lake ecosystem food web?
phytoplankton
Plants living in moving water have:
What is
Long, thin, flexible stems that offer little resistance to the current and strong root systems to hold them in place
The area of the lake from the shoreline outward to the point sunlight no longer reaches the bottom is called (rooted plant growth occurs in this area)?
Littoral Zone
All living organisms are made of which element?
carbon
How would heavy rains affect a stream’s velocity?
Increase it by increasing the volume
Where is lake water the coldest?
At the bottom (Hypolimnion Zone)
What do plants need to survive?
CO2, Water, Sunlight
This zone is the most productive
littoral zone
Riparian Zones have two roles in a stream/river ecosystem. What are they?
Filter pollutants, stabilize shorelines
Where on a river bend does erosion occur?
On the outside of the bend
What is the only natural lake in Texas?
Caddo Lake
These types of animals are characterized by how they get their food: an aquatic invertebrate that has a special mouthparts they use to remove algae or other food material growing on the surface of plants or solid objects
scrapers
this zone is loaded with decomposers
benthic zone
What effect does building on a flood plain have on flooding?
increases flooding