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Lab 3 - Experiment 1: Interdependence of Species



 


 

Table 1: Interdependence of
  Species Results


 

 

Round


 

 

Species Missing (Bead Color and
  Name)


 

 

1


 

 


 

 

2


 

 


 

 

3


 

 


 

 

4


 

 


 


 

Hypothesis:


 

Post-Lab
Questions



 

1. 
Restate
your hypothesis. Was it confirmed or denied? How do you know?


 

2. 
Indicate
which species was removed during each round of the experiment.


 

3. 
Explain
how the ecosystem was affected by the missing species for each round of the
experiment.


 

4. 
What
actions do we as humans engage in that can lead to extinction of any of these
components?


 

5. 
What
can we do to minimize our impact on the ecosystem?


 

Lab 3 - Experiment 2: Diversity of Plants



 


 

Table 2: Number of Each Plant
  Species Present in Pot 1 and Pot 2


 

 

Species Observed


 

 

Number in Pot 1


 

 

Number in Pot 2


 

 

Zinnia


 

 


 

 


 

 

Marigold


 

 


 

 


 

 

Morning Glory


 

 


 

 


 

 

Cosmos


 

 


 

 


 

 

Ryegrass


 

 


 

 


 

 

Total Number of Species in Pot:


 

 


 

 


 


 

Hypothesis:


 

Post-Lab
Questions



 

1. 
Restate
your hypothesis. Was it confirmed or denied? How do you know?


 

2. 
How
many different kinds of species did you find in your sample?


 

3. 
Which
species is the most numerous in your sample area? Which is the least numerous?


 

4. 
If
each peat pot was a sample you found in a group of wildflowers, would you
determine based on the diversity of flowers that the ecosystem is healthy?


 

5. 
How
does biodiversity contribute to overall health of an ecosystem?


 

Nov 30th, -0001

The result of these experiments are based on our experiments.

Lab 3 - Experiment 1: Interdependence of Species

Red beads: lovebirds

blue beads: pigeons

yellow beads: parrots

orange: woodpeckers


 

Table 1: Interdependence of
  Species Results


 

Round


 

Species Missing (Bead Color and
  Name)


 

1

yellow

 

2

blue

 

3

yellow

 

4

orange

Hypothesis: The beads that are missing depends on their frequency or their population. Species competing for limited resources cannot coexist in the same place at the same time.

Post-Lab
Questions


1. 
Restate your hypothesis. Was it confirmed or denied? How do you know?

Species competing for limited resources cannot coexist in the same place at the same time. It was confirmed. Either one can only be present and the fact that that there are beads that is missing means that there is a competition between the two.

2. 
Indicate which species was removed during each round of the experiment.

Round 1-parrots

round 2- pigeons

round 3-parrots

round 4- woodpeckers

3. 
Explain how the ecosystem was affected by the missing species for each round of the
experiment.

In an ecosystem with missing species, the competition between two species will be lesser than before. In each round, the parrots will have lesser frequency for the next round and thus would be an opportunity for other species' population to proliferate. As the rounds goes on, there is a possibility that extinction may occur to the less favored species.

4. 
What actions do we as humans engage in that can lead to extinction of any of these components?

Deforestation.

Farming.

5. 
What can we do to minimize our impact on the ecosystem?

We could plant more trees. Conservation of the forests will bring back the habitat of the remaining alive species and will cause them to survive in the next generation.

Lab 3 - Experiment 2: Diversity of Plants



 

Table 2: Number of Each Plant
  Species Present in Pot 1 and Pot 2


 

Zinnia

3

2

Marigold

6

2

Morning Glory

4

4

Cosmos

1

1

Ryegrass

7

6

Total Number of Species in Pot:

21

15



Hypothesis: The plant species are competing for the space and thus will cause for other species to go extinct.

Post-Lab
Questions


1. 
Restate your hypothesis. Was it confirmed or denied? How do you know?

  • If competition for a limited resource is intense, there are two possible outcomes:
    • One species drives the other to extinction.
    • Natural selection reduces the competition between the species.
It was confirmed because the second pot shows that there is a decrease in the population of other plant species.

2. How many different kinds of species did you find in your sample?

There are 5 species.

3. 
Which species is the most numerous in your sample area? Which is the least numerous?

Ryegrass is the most numerous, while the Cosmos is the least numerous

4. 
If each peat pot was a sample you found in a group of wildflowers, would you
determine based on the diversity of flowers that the ecosystem is healthy?

Yes, because the presence of different species is a sign that the environment is appropriate for living organisms and that biodiversity will help each other species to survive.

5. 
How does biodiversity contribute to overall health of an ecosystem?

Biodiversity contributes to the overall health of an ecosystem by making it sure that each species will benefit from another species and vice versa. For example, the existence of trees in the forests will provide the habitat of  creatures like birds and bats. Consequently, the birds and bats will help in the seed dispersal of the trees so that it could reproduce. The example given is a representation of species interdependence.

Jun 30th, 2013

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