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Symbiosis: Mutualism, Commensalism and Parasitism

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Presentation on theme: "Symbiosis: Mutualism, Commensalism and Parasitism"— Presentation transcript:

1 Symbiosis: Mutualism, Commensalism and Parasitism

2 Student Learning Goals write on pg. 21
Explain how abiotic and biotic factors influence an ecosystem Describe how organisms affect their environments Compare and Contrast the types of interactions that occur within communities

3 Review define the words below ↓
Biotic Factors- Abiotic Factors-

4 Review Biotic Factors-Biological influence on organisms within an ecosystem Abiotic Factors-Physical or non-living factor that shapes an ecosystem

5 How organisms impact their environment
The species in an ecosystem will interact in different ways. These interactions may have positive, neutral or negative impacts on the species involved.

6 Symbiosis The term symbiosis can be used to broadly refer to these types of relationships as it directly translates to mean living together (sym: with; bio: life). Symbiosis is the ecological relationship between two or more organisms living closely together with some form of feeding relationship involved.

7 The three main symbiotic relationships are:
Mutualism Commensalism Parasitism

8 Mutualism A mutualistic relationship is when two organisms of different species "work together," each benefiting from the relationship. One example is that of the bee and the flower.

9 Mutualism-The Bee and the Flower
Bees fly from flower to flower gathering nectar, which they make into food, benefiting the bees. When they land in a flower, the bees get some pollen on their hairy bodies, and when they land in the next flower, some of the pollen from the first one rubs off, pollinating* the plant. This benefits the plants. In this mutualistic relationship, the bees get to eat, and the flowering plants get to reproduce.

10 Mutualism-Bacteria in our gut
The bacteria and the human. A certain kind of bacteria lives in the intestines of humans and many other animals. The human cannot digest all of the food that it eats. The bacteria eat the food that the human cannot digest and partially digest it, allowing the human to finish the job. The bacteria benefit by getting food, and the human benefits by being able to digest the food it eats.

11 Commensalism a relationship between two organisms where one receives a benefit or benefits from the other and the other is not affected by it. In other words, one is benefited and the other is neither benefited nor harmed. One example is the Clownfish and Anenome

12 Commensalism-Clownfish and Anenome
Anemonefishes or clownfishes - These live amid the tentacles of the anemones which protects them from predators. Predators are poisoned by the nematocysts of the anemones.

13 Commensalism-Burdocks and Animals
Burdocks - These are common weeds and dispersal of their seeds is critical to their life cycle. Their seeds have spines or spines with hooks that will allow them to be picked up in the fur of animals passing by. They can also attach to the clothing of humans.

14 Parasitism a non-mutual symbiotic relationship between species, where one species, the parasite, benefits at the expense of the other, the host. Traditionally parasite referred primarily to organisms visible to the naked eye, or macroparasites (such as helminths). An example is the Tick and Animals

15 Parasitism-Ticks and Animals
Ticks are ectoparasites (outside) and attach themselves to animals and suck their blood for food. Ticks are vectors of a number of diseases, including Lyme Disease.

16 Tongue-eating Parasite and Fish
Sucks blood of the tongue of fish until tongue falls off-then it acts as a tongue and feeds off fish.



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