Question

Starlings are birds that were brought into the United States from Europe for breeding purposes. Their numbers have increased to such an extent that they have dislodged native birds, caused crop damage. They also carry swine diseases. What role do they play in the ecosystems of the United States ?

Answer 1

Do you have options?

Answer 2

Dominant
Keystone
Invasive

Answer 3

Do you know these three terms?

Answer 4

Dominant keystone and inasive/

Answer 5

No clue

Answer 6

Dominant species: one of a small number of species which dominate in an ecological community

Keystone species: keystone species is a species that has a disproportionately large effect on its environment relative to its abundance. Such species are described as playing a critical role in maintaining the structure of an ecological community, affecting many other organisms in an ecosystem and helping to determine the types and numbers of various other species in the community.

Inasive species:n invasive species is defined as an organism (plant, animal, fungus, or bacterium) that is not native and has negative effects on our economy, our environment, or our health. Not all introduced species are invasive.

Answer 7

Explained well so I would go with keystone am I right

Answer 8

I've given you explanation now go with which one you think is correct..

Answer 9

Check out this site for understadning ..
http://icwdm.org/handbook/birds/EuropeanStarlings.asp

Answer 10

I think I went with the right answer but like to know if I'm correct

Answer 11

I don't think it's keystone..
According to your question..(read it carefully) and that site which I've given you..

Answer 12

Crop damage is positive effect or negative?

Answer 13

Ok I'll see if I can find my answer

Answer 14

Effect

Answer 15

I got it invasive you explanes well

Answer 16

http://icwdm.org/handbook/birds/EuropeanStarlings.asp..

Answer 17

http://lib.colostate.edu/research/agnic/starlings.html

Answer 18

It won't let me open that site it said 404 error

Answer 19

It's dominant I was wrong

Answer 20

Are you sure it's dominant?

Answer 21

It invasive I'm sure of it

Answer 22

Why did you think it's dominant?

Answer 23

I was reading the stuff wrong

Answer 24

Moving on to the next