Question

1 what are coastal ecosystems primarily characterized by? a) high salinity levels b) interaction between terrestrial and marine environments c) lack of biodiversity d) stable temperatures 2 which of the following best defines an estuary? a) a coastal body of water where freshwater meets saltwater b) a freshwater body isolated from the ocean c) a type of coral reef d) a land - locked body of water 3 what is a critical ecological function of mangrove forests? a) they reduce erosion through their root systems. b) they provide habitats exclusively for terrestrial animals c) they only grow in freshwater environments d) they are not involved in carbon sequestration. 4 salt marshes are important for which of the following reasons? a) they are dominated by freshwater plants. b) they have no impact on coastal erosion c) they act as natural water filters d) they only exist in tropical regions 5 what type of vegetation is primarily found in seagrass beds? a) woody trees b) terrestrial grasses c) salt - tolerant shrubs d) marine flowering plants

Explanation:

1. Coastal ecosystems are characterized by the interaction between terrestrial and marine environments. High salinity levels are not universal for all coastal ecosystems, they are not lacking in biodiversity, and stable temperatures are not their primary characteristic.
2. An estuary is a coastal body of water where freshwater from rivers or streams meets and mixes with salt - water from the ocean.
3. Mangrove forests have root systems that help bind the soil and reduce erosion along coastlines. They provide habitats for both terrestrial and marine animals, grow in brackish water (not just freshwater), and are involved in carbon sequestration.
4. Salt marshes act as natural water filters, trapping sediments and pollutants. They are dominated by salt - tolerant plants, can reduce coastal erosion, and are not limited to tropical regions.
5. Seagrass beds are primarily composed of marine flowering plants. Woody trees are not found in seagrass beds, terrestrial grasses are not relevant, and salt - tolerant shrubs are not the main vegetation in seagrass beds.

Answer:

1. b. Interaction between terrestrial and marine environments
2. a. A coastal body of water where freshwater meets saltwater
3. a. They reduce erosion through their root systems
4. c. They act as natural water filters
5. d. Marine flowering plants