1.) How does climate change affect the biodiversity of marine ecosystems?

2.) How does climate change affect the ocean?

3.) How do the ocean currents affect climate?

1.) Any kind of temperature change in a marine ecosystem can cause certain animals to have difficulties so some fish may have to move to new locations which can cause for other marine life.

2.) Climate change is primary cause of the ice caps/glaciers melting and can change water level over many many years as well as raising the temperature of the ocean and the destruction of marine ecosystems.

3.) Ocean currents move cold and warm water around the globe and that can control global climate.

Explanation: Sorry if these aren't specific enough but it should be enough for an answer. I wouldn't recommend using these exactly but they give an idea of what to put and a little extra on question one might be needed. But these should still work as answers.