Ecological relationships
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Ecological Relationships. Reflection question using this picture: What are some components within an ecosystem? How is an ecosystem different than a community?. What is an ecosystem?. – a community and its abiotic factors. What is a community?.

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Ecological Relationships

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Ecological relationships

Ecological Relationships


Ecological relationships

Reflection question using this picture:What are some components withinan ecosystem?How is an ecosystem different than a community?


What is an ecosystem

What is an ecosystem?

– a community and its abiotic factors

What is a community?

a group of populations that are living and interacting with one another. They are interdependent (depend on one another)

  • a group of organisms of the same species that live in the same area

What is a population?

Communities are the building blocks of ecosystems


Do you remember what an abiotic factor is

Do you remember what an abiotic factor is?

non-living

http://www.google.com/imgres?imgurl=http://images.tutorvista.com/content/feed/tvcs/biotic-abiotic_0.gif&imgrefurl=http://www.tutorvista.com/biology/abiotic-factors-of-the-tundra&h=450&w=501&sz=19&tbnid=SYQkkfMdj84QxM:&tbnh=90&tbnw=100&prev=/search%3Fq%3Dabiotic%2Bfactors%26tbm%3Disch%26tbo%3Du&zoom=1&q=abiotic+factors&usg=__3qTZObCF00i3HUSdOjDKuwX5Pi4=&docid=nuQbIbk8ywn28M&hl=en&sa=X&ei=c10yUKCdBIS9ywGN7YCgCA&sqi=2&ved=0CGEQ9QEwBg&dur=501


Within communities

Within Communities

Biodiversity = the number of species in an ecosystem

Crucial to ecosystem productivity

Territory = space claimed by an individual organism

Required by all living things

Ecological Equilibrium = state of “balance” in an ecosystem

http://www2.warwick.ac.uk/about/environment/faqs/biodiversity.jpg


Ecological relationships1

Ecological Relationships

The role in their habitat

Ex: Fox helps control small animal populations.

- an Ecological relationship is a relationship between animals and their habitat

http://www.cs.umbc.edu/courses/undergraduate/201/fall06/projects/p1/fox-rabbit.jpg


Ecological relationships

A niche is the sum of all activities and relationships a species has while obtaining and using resources needed to survive and reproduce

  • NICHE – an organism’s “role” in an ecosystem (job)

  • NICHE DIVERSITY– Number of niches in an ecosystem; often determined by abiotic factors


1 competition

1. Competition:

When species or individuals “fight” for the same resources.

E.g., Food, shelter….

KEYSTONE PREDATOR/SPECIES -A predator that causes a large increase in diversity of its habitat.

The “fight” may be indirect … individuals may never directly contact each other.

Losing a keystone species usually disrupts many ecological relationships.

http://www.butler.edu/herbarium/prairie/prairie42004.jpg

Two species with similar needs for same limited resources cannot coexist.


Herbivory

Herbivory:

A primary consumer feeds on a producer.

2. Feeding Relationships

http://www.smilinglizard.com/1a291aa0.jpg

http://images.inmagine.com/168nwm/creatas/cr15169/cr15169065.jpg

A fruit bat eating a papaya

A woodchuck eating wild clover


2 feeding relationships

2. Feeding Relationships

Predation: actively hunting your food source (carnivory)

http://nationalzoo.si.edu/Publications/ZooGoer/2006/3/IMAGES/lion_zebra.jpg

A lion eating zebra.

http://www.citypaper.net/blogs/clog/wp-content/uploads/2007/06/close-up-bald-eagle-eating.jpg

  • A consumer feeds on another consumer.

An eagle eating halibut.


3 symbiosis

3. Symbiosis:

  • A long-term relationship where two species live closely together and at least one benefits directly from the relationship.

http://www.floridastateparks.org/maclaygardens/images/wallpaper/1024-PL-MAC-Symbiosis-MarkFerrulo.jpg


Mutualism

Mutualism:

  • Both organisms benefit from the relationship.

  • Win-Win situation!

http://tumi-educational-resources.org/Educational%20%20Videos.htm


Commensalism

Commensalism

  • One organism benefits, the other one is unaffected.

  • Win-Neutral relationship


Parasitism

Parasitism

  • One organism benefits, the other one is harmed!

  • Win-Lose relationship

  • Parasites rarely kill their hosts…it would require them to get another one!


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