I. NicheI. Niche

Describes what an Describes what an organism does and how organism does and how it interacts with the it interacts with the biotic and abiotic biotic and abiotic factors of its factors of its environment.environment.

NicheNiche

ResourcesResources refer to any refer to any necessity of life, such as necessity of life, such as water, nutrients, food, water, nutrients, food, or space.or space.

NicheNiche

The The Physical Aspects of Physical Aspects of the Nichethe Niche are the abiotic are the abiotic factors that are required for factors that are required for survival. An example would survival. An example would be water.be water.

The The Biological Aspects of Biological Aspects of the Niche the Niche involve the biotic involve the biotic factors that are required for factors that are required for survival. An example wouldsurvival. An example would

reproduction and food. reproduction and food.

NicheNiche

There are two conditions that help define where and There are two conditions that help define where and how organisms live.how organisms live. ToleranceTolerance

Is the ability to survive and reproduce under a Is the ability to survive and reproduce under a range of environmental conditions. range of environmental conditions.

All organisms have an upper and lower limit of All organisms have an upper and lower limit of tolerance for every environmental factor.tolerance for every environmental factor.

Habitat Habitat Is the general place where an organism lives.Is the general place where an organism lives.

CompetitionCompetition

Occurs when Occurs when organisms attempt to organisms attempt to use the same limited use the same limited ecological resource ecological resource in the same place in the same place and time.and time.

Can be intraspecific Can be intraspecific or interspecific.or interspecific.

CompetitionCompetition

Competitive Competitive exclusion principle exclusion principle states that no two states that no two species can occupy species can occupy exactly the same exactly the same niche in exactly the niche in exactly the same habitat at same habitat at exactly the same exactly the same time.time.

CompetitionCompetition

Division of resourcesDivision of resources By causing species to By causing species to

divide resources, divide resources, competition helps competition helps determine the determine the number and kind of number and kind of species in a species in a community and the community and the niche each species niche each species occupies.occupies.

Competition

Division of resources Species usually divide

similar resources instead of competing for them.

Predation, Herbivory, and Keystone Species

Predation-prey relationships Predation occurs when one animal captures and feeds on another

animal. Predators can affect the size of prey populations in a community and

determine the places prey can live and feed.

Predation, Herbivory, and Keystone Species

Herbivore- Plant Relationships Herbivory is an interaction in which one animal feeds on

producers. Herbivores can have major effects on plant survival.

Predation, Herbivory, and Keystone Species

Keystone species is a single species that can cause dramatic effects in the structure of a community. Examples: wolf and sea

otter.

Symbiosis

Means “living together.” Is any relationship in which two species live

closely together. Biologist recognize three main classes of

symbiotic relationships: mutualism, parasitism, and commensalism.

Symbiosis

Mutualism is a relationship in which both species benefit. Example: sea anemone

and clown fish.

Symbiosis

Parasitism is a relationship in which one organism lives inside or on another organisms and harms it.

Symbiosis

Commensalism is relationship in which one organism benefits and the other neither harmed nor helped. Examples: whale and

barnacles, shark and remora.

Assignment

Write a sentence that demonstrates your understanding of the vocabulary terms on page 99 of your M&L biology textbook. Do not write the definitions of the terms.