Marine Ecosystems

A Marine Ecosystem is an ecosystem in a large body of water.

The two main types of Marine Ecosystems are Aquatic and.

Freshwater Ecosystems are relatively small in area - 1.8% of Earth's surface.

Supports many species of life including fish, amphibians, insects, and plants.

Base of food web is found in freshwater plankton (small microscopic organisms)

Marine Ecosystems cover approximately 71% of the Earth's surface.

Classes of organisms found in marine ecosystems include brown algae, corals, and sharks.

Abiotic and Biotic Factors

Some Biotic Factors:

Animals, such as sharks, eels, whales, seals, etc.

Some Abiotic Factors:

Nonliving things, such as algae, rocks, seaweed, sand, coral, etc.

Carrying Capacity and Changes in Populations

Carrying capacity is the number of organisms that can be held in an ecosystem.

Some resources needed for a population to survive are food, water, shelter, and space.

Populations change when consumers come and eat them. (Such as a shark eating a fish.)

Limiting Factors and Predator/Prey Relationships

Some limiting factors of freshwater ecosystems are:

Density, human interaction, temperature, sunlight, and food.

Some predator/prey relationships:

Shark/Fish, Eel/Small Water Insect, Whale/Plankton.

Energy Roles

A producer for a freshwater ecosystem would be seaweed. Seaweed transfers energy from the sun to get energy.

A consumer would be a crab (herbivore).

A decomposer would be a fly (scavenger).

Food Chains & Food Webs

Food Chain: The feeding relationships between species in a biotic community.

Food Web: Shows interactions between organisms.

Trophic Levels & Energy Pyramids

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