Quiz Pertemuan Kedua

What role do inorganic nutrients such as phosphorus and nitrogen, along with dissolved organic matter, play in the ocean's primary production mechanism?

• A. They inhibit primary production.

• B. They have no significant impact.

• C. They are crucial components in the primary production mechanism.

• D. They contribute to ocean pollution.

In the context of nutrient needs, which marine communities require more nutrients compared to oligotrophic coral communities?

• A. Deep-sea communities.

• B. Mangrove and seagrass communities.

• C. Polar ice communities.

• D. Open ocean communities.

How do the physical characteristics of mangroves and seagrasses contribute to nutrient dynamics in marine ecosystems?

• A. They repel nutrients from the land.

• B. They absorb excess nutrients and store them.

• C. They have no impact on nutrient flow.

• D. They release harmful chemicals into the ocean.

Which category of interaction involves the movement of organisms within the marine ecosystem?

• A. Physical interactions.

• B. Dissolved organic matter interactions.

• C. Particulate organic matter interactions.

• D. Biotic migrations.

What type of interaction includes the influence of human activities on the tropical marine ecosystem?

• A. Physical interactions.

• B. Dissolved organic matter interactions.

• C. Human impacts.

• D. Particulate organic matter interactions.

Why are seagrass and mangrove communities highly dependent on the presence of sturdy coral reef structures?

• A. For reducing wave energy.

• B. For reducing sediment.

• C. For regulating water supply.

• D. For hindering hydrodynamic actions such as currents and waves.

Why is the first function of seagrass ecosystems crucial for coral reefs?

• A. It regulates water supply.

• B. It enhances sediment production.

• C. It prevents sedimentation on coral surfaces.

• D. It promotes zooxanthellae photosynthesis.

How many categories of biota migration?

• Two

• Three

• Four

• Five