Answer :
Answer: The given statement is True.
Human activities on land can have a profound influence on marine ecosystems. These include both direct as well as indirect activities by humans, which influence marine ecosystems.
For instance, direct human activities like use of fertilizers in agriculture can have a profound influence on the marine ecosystem. Chemical fertilizers provide extra nutrients to the plants, increasing the fertility of the soil and thereby promote the growth of plants.
These fertilizers are harmful to the aquatic lives. They travel to the marine ecosystem via water run off from the agricultural land. Excess fertilizers cause the formation of algal blooms, which are very toxic. They lead to the lack of oxygen in the water, which results in the loss of aquatic lives.