Module 177:Aquatic Biomes Flashcards
Aquatic Biome covers what percent of the planets surface?
It covers 3/4 of the planets surface and can be up to 6 miles deep
What is a water cycle?
A pattern of evaporation and condensation that transfers water from one biome to the other
Two types of aquatic biomes?
- Freshwater (3% of aquatic biomes)
2. Saltwater
Salinity varies from?
0.03-30%
Most organisms can only tolerate a relatively narrow range of salinity, though there are exceptions like?
Salmon
Salinity % Ranges
- Fresh
- Brackish (Rivers Enter into Ocean)
- Salt
- Brine or Hypersaline (Dead Sea)
- is less than 0.05
- is 0.05-2.9
- 3.0-4.9
- is greater than or equal to 5.0
Most important nutrients include?
Nitrogen and phosphorus compounds
Nitrogen and phosphorus compounds affect ….. at the base of the food web
primary producers
Biomes are low in nutrients and can support relatively little biomass?
Oligotrophic Biomes
Biomes are high in nutrients, and have much more biomass?
Eutrophic Biomes
Can human activities cause eutrophicationof aquatic biomes?
Yes, they can
Primary producers?
Microbes(plankton)- photosynthesis
Where would you expect to find the limnetic zone of a lake?
open water
A coastal body of water partly surrounded by land with input from both sea and fresh water is called ___.
an estuary
The deepest zone in a large lake, below where the sunlight penetrates, is the ___.
profundal zone
Eutrophic lake water typically has what characteristic?
It is shallow.
The ___ is the zone near a lake’s shoreline where light is abundant.
littoral
Which of the following would NOT apply to freshwater wetlands?
drought resistant plants
Freshwater biomes can be distinguished from saltwater biomes by a number of characteristics. Which of the following is most likely to be observed in a freshwater biome?
salinity of less than 0.05%
The benthic zone of coral reefs is formed out of ___.
coral skeletons
The characteristics of the water from the surface to the bottom of the body of water?
Water Column
What is Photic zone?
Sufficient light for photosynthesis
What is Apothic zone?
Not enough light for photosynthesis
Benthic region?
Bottom if the body of water
