This answer would be true, b/c it is not false. It's not false b/c coral reef ecosystems <em><u>DO</u></em> support over a million different species.
This is what I found for facts if you look at it and do a little research your self. https://spectrumlocalnews.com/tx/san-antonio/news/2019/06/06/what-s-next-for-lake-dunlap--what-we-know-and-what-we-don-t
Producers,consumers,and decomposers are linked because they all have to work together to stay alive the produces will make the energy inside itself then the consumers will eat it then have all the energy the plant had then the consumer will die and the decomposer will beak it down and eat what remains of the animal
i hoped this helped :)
Lack of water would have an impact on the level of glucose produced hence decreasing the energy level that will finally be produced.