how do organisms depend on each other for...

How do organisms depend on each other for survival?

How do organisms depend on each other for survival? SB4-a Symbiosis

close and often long-term interactions between different biological species

Competition

When two organisms compete over the same resource

Intraspecific competition – same species

Interspecific competition – separate species

How do organisms depend on each other for survival? SB4-a

Commensalism

relationship between two organisms where one organism benefits but the other is unaffected

How do organisms depend on each other for survival? SB4-a

Mutualism

ecological interactions between two species in which both benefit.

A species may be so dependent that it cannot live without its mutualistic partner

How do organisms depend on each other for survival? SB4-a

Predation

biological interaction where a predator (an organism that is hunting) feeds on its prey (the organism that is attacked)

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How do organisms depend on each other for survival? SB4-a

Parasitism

relationship between organisms of different species where one organism, the parasite, benefits at the expense of the host.

How do organisms depend on each other for survival? SB4-a

Coevolution

the change of a biological object triggered by the change of a related object

How do organisms depend on each other for survival? SB4-a

Niche

the position or function of an organism in a community of plants and animals

How do organisms depend on each other for survival? SB4-a

Habitat

is an ecological or environmental area that is inhabited by a particular species of animal

How do organisms depend on each other for survival? SB4-a

How do organisms depend on each other for survival? SB4-a

Keystone species

A species that is critical to the ecosystem because it affects the survival and number of many other species in its community.

Keystone Species Sea otters eat sea urchins. Sea urchins eat kelp. When

sea otters are present, lush kelp forests grow along the west coast of North America. These kelp forests provide a habitat for many fishes and other aquatic animals. When sea otters disappeared due to overhunting, the sea urchins ate all the kelp. All the species depended on the kelp also disappeared. Sea otters are an example of a keystone species.