Content

1- producers are autrophic organisms that carry out the photosynthesis and convert inorganic matter into organic matter 

2-consumrs are heterotrophic organisms that feed on other living things 

3- decomposers are heterotrophic organisms the feed on the remains of the other trophic levels 

FOOD CHSINS  

is a diagram in which organisms in an ecosystem from different trophic levels of the ecosystem and their feeding relationships 

FOOD Webs 

are diagrams of all the food chains in an ecosystem and their connections to each other

AQUIATIC ECOSYSTEM 

TYPES

plankton ( microscope organisms that live in water ) protozoa 

nekton ( organisms that can swim and move indeoendetly ) fish 

bethons( organisms that live on the seabed or riverbed , attached to a substrate )

MARINE ECOSYSTEM 

zones actegoried to their distance 

neritic=extends from the shore to the edge of the continental self , on the prt of a content that is subermerged in the sea

oceanic= is located offshore beyond the continental self ., it waters have limited nutrients 

zones categories by depth 

1-pelagic zone=  is the closest to the surface and the most brightly lit ( 200 meters) 

2- bathyal zone= is Avery dimly lit layer ( range 200-2000 metres) 

3-abyssal zone= lies below 2000 metres where there is not light . This zone is home to animals that feed on the remains of marine organisms 

- Thy hace great biodiversity 

- they are source of energy productions 

-tey provide large amounts of sediments and nutrients that help maintain coastal ecosystem 

RTHE IMPIRTANCE WETLANDS 

-rhey are havens for migratory birds ( flamenco)

-they are source of natural resources (rice)

-they act as natural reservoir during periods of rainfall