Need help fixing or rewording my null hypothesis on both my experiments.

Also what am I doing wrong as far as the wording?

Experiment 1

In my first experiment, the controllable variable will be island distance from the mainland and the uncontrollable variable will be the Taxon of birds.

Hypothesis one: The closer the island is to the mainland, the population and variety of species in birds will increase.

Null Hypothesis: The shift in bird population and variety has no influence on the distance between the island and the mainland.

Some of the constants in which would be the island diameter, migration rate and mortality. I hoping to use the distance in two ways conducting two trials one being an island furthest away it can be from the mainland and the other as closest. The other trial I would like to conduct would be to use one of the islands just a few Km from the mainland as well as the other island furthest to the point its entirety is on the screen in site. I am hoping it would help in aid in proving the hypothesis.

Experiment 2

In my second experiment, the controllable variable will be island size and the uncontrollable variable will be the Taxon of Arthropods.

Hypothesis one: The smaller the island, the less variety of species and population in arthropods.

Null Hypothesis: The land size has no influence on the population and variety of Arthropods.

Some of the constants in which would be the island distance, migration rate, and mortality. I am hoping to use size in two ways by conducting two trials. One trial will be one island is twice the size of island two or half itself size and the other trial will be the biggest one island can be and the other the smallest within the parameters of the experiment. I am hoping with the use of the two trials it helps proves my hypothesis.