Competition & Niche Utilization

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Presentation transcript:

Competition & Niche Utilization

Nature exists at several levels of complexity

What is a niche? No 2 species can occupy the same niche!! Sometimes it’s referred to as an organism’s “job”. It’s the organism’s role in the ecosystem. It describes how an organism uses and affects others use of resources. No 2 species can occupy the same niche!!

Competition Competition: the struggle of individuals to obtain a limiting resource .

Resource Partitioning

Temporal Partitioning

Spacial Partitioning

Spacial Partitioning

Spacial Partitioning

Morphological Partitioning

Predation Predation True predators - kill their prey. Herbivores - consume plants as prey. Parasites - live on or in the organism they consume. Parasitoids - lay eggs inside other organisms.

Mutualism Bird Fish Mutualism - A type of interspecific interaction where both species benefit.

Commensalism Commensalism - a type of relationship in which one species benefits but the other is neither harmed nor helped.

Keystone Species Keystone species - a species that plays a role in its community that is far more important than its relative abundance might suggest.

Keystone Species