1. Environmental Science November 5, 2008
Mrs. Rosen Mrs. Waldinger
Do Now: Handout
Aim: What are the types of aquatic biomes?
HW #10: Packet is due Monday

10. Estuaries Estuary: a region where a freshwater
source, usually the mouth of a river,
meets the salt water ocean.

11. Man Comes to the Estuary

13. The Isle of Wight in the UK

14. Intertidal Zones
This zone is located along the shoreline of the world ocean.
The intertidal zone alternates twice each day between periods of submersion at high tide.
Organisms that live in this zone must be able to endure exposed and submerged conditions. They also have to withstand the pounding of the surf.

15. Wetlands ~~~~~~~ Since intertidal zones occur where water meets land, they are often surrounded by wetlands such as salt marshes and mangrove swamps.
SALT MARSHES
~~~~~~~
Salt Marsh: flat, muddy wetlands that are often surrounded by estuaries, bays, and lagoons.
The most important purpose it serves is for migratory birds. They provide a place for food and rest during their long journeys.

16. This causes the course of the river to change sometimes.
The Mississippi River undergoes 5,000-year cycle of sediment accumulation , subsidence, and course changes. The Mississippi River delta makes up 40% of the costal wetlands of the contiguous United States
Salt Marshes
*Salt Marshes are formed when stream flow into the calm waters of estuaries or other shallow neritic waters. The slowing of the water causes sediments to build up at the mouth of the stream.
These build over time to form a delta. The weight of the accumulated sediments causes the delta to sink under water in a process called subsidence.
This causes the course of the river to change sometimes. .

17. Mangrove Swamp
This wetland only occurs in warm climates. They can only exist in places that do not freeze more than one or two days a year.
The dominant plant of the mangrove is the mangrove, a woody plant that can be a tree or a shrub.
The water in the mangrove contains a small amount of oxygen.
The plants have adapted to the low oxygen level by having roots that stick out above the water.