Aquatic Biomes. Marine Ocean Estuary Fresh Water Rivers and Streams ( Lotic ) Lakes and Ponds ( Lentic ). Aquatic Biomes. Oceans. Continental Shelf – the portion of the continental plate that lies submerged under the ocean. Usually has a gentle slope
Oceanic zone – any portion of the ocean beyond the continental shelf.
Neritic zone – section of ocean that lies over the continental shelf.
Littoral zone – shoreline between the high and low tide marks.
Photic Zone – area of water that sunlight penetrates
Aphotic zone – area of water that sunlight does not penetrate
Thermocline – vertical area where temperature abruptly changes; restricts the mixing of upper and lower water masses.
Colorful crab perched on top of a large tubeworm cluster at GC 354, depth 532 m. This community was first discovered on this MMS/LSU subdive, August 24, 2000
Organisms use organic material seeping from the ocean floor as an energy source
Intermediate Marsh Salt Marsh
Stream Order – Strahler MethodStream Order
Used to classify a stream in relation to tributaries, drainage area, total length, and age of water.
1 1 = 2
1 2 = 2
2 2 = 3
1 3 = 3
2 3 = 3
3 3 = 4
Mississippi River is classified as a 10th or 12th order stream.
Headwater stream classification matters
You will be required to draw a map of the major rivers of the Mississippi River Basin as part of exam 1.
Mississippi River (Main Stem)
Atchafalaya River (Distributary)
Distributary – A smaller channel that takes water away from the main stem river.
Ponds – light can reach the entire bottom
Lakes – light can not reach some parts of the bottom
Dissolved O2 concentration