Laboratory 3 Info

term used to identify an aquatic community that is characterized by standing water as opposed to flowing water

Living Organisms

physical and chemical factors

yield primary production of organic material that is the foundation of the community

• Those who feed on autotrophs
• can either be herbivorous or carnivorous

shallow area near the shore

open, offshore area of the lake

extends from the water surface to the depth of light penetration

Microscopic chlorophyll-containing bacteria and protists

• middle zone characterized by the lack of light penetration into the water column
• extends down to the area immediately above the bottom sediments

Bacteria and protists that are more "animal-like"

characterized by the bacterial decomposition of the remains of plants, animals, and other organisms that lived and died in the lake

layering effect of warmer water over cooler water

capacity to hold dissolved oxygen and carbon dioxide decreases

capacity to hold dissolved oxygen and carbon dioxide increases

• Water temperature
• Photosynthesis
• Respiration in the cells of organisms living in the water

carbon dioxide is used up and oxygen is produced

characterized by the production of ATP; uses oxygen and produces carbon dioxide