Final answer:
As ocean temperature decreases along the coast of several Galápagos Islands, the size and productivity of algae pastures decrease.
Step-by-step explanation:
Researcher Martin Wikelski has found that as ocean temperature decreases along the coast of several Galápagos Islands, the size and productivity of algae pastures decrease.
This is because algae require certain environmental conditions, such as temperature, light, and nutrient availability, to grow and reproduce. When the temperature decreases, it can affect the metabolic processes of algae, leading to a decrease in their size and productivity.