Trophic Interactions

Part 1: Trophic Interactions

 

American coots foraging on Lake Merced

 

What do you think is the most influential species in your location (don’t include humans) explain why you think it is important?

-Plant species, specifically the oak trees found at Lake Merced are influential because they provide many resources and benefits for other species. Plants convert carbon dioxide to oxygen which is important for us humans. They also provide food for many other species, along with shelter and shade.

 

What would happen if you removed it?

-If plants were removed, there would be a build up of carbon dioxide.

 

What if you replaced it with an invasive species?

-We would see an impact on the oak trees where they can eventually go extinct if it cannot compete with the invasive species. Some animals such as squirrels may be affected since they eat acorns which are provided by the oak trees. If the new invasive species do not bear any edible seeds, the squirrels may be forced to rely on other resources.

 

Choose three of your organisms you took photos of for the first capstone exercise, list what they are and tell what Slobodkin, Smith, and Hairston’s article says they are ultimately limited by.

1.North American gulls

2.Mallard ducks

3.Rock pigeon

All limited by food.

 

Done