*How much energy do they get from the sun?

Seagrasses
Mangroves

Seagrasses and mangroves are both primary producers, which means they obtain energy from the sun through the process of photosynthesis. They convert sunlight into chemical energy and store it in their tissues.

The amount of energy they receive from the sun can vary depending on various factors such as sunlight availability, the latitude where they are located, and the water depth. On average, seagrasses receive about 20-50% of the incident solar radiation that reaches the water surface, while mangroves can receive slightly higher amounts due to their often taller canopy structure.

In terms of quantifying energy, it is challenging to provide a specific unit of measurement as energy availability fluctuates. However, both seagrasses and mangroves contribute significantly to coastal ecosystem productivity and provide energy for various organisms within their respective ecosystems.