Offshore vs Coastal Phytoplankton Distribution and Chlorophyll Fluorescence #2211466 (License: Personal Use)

This scientific illustration contrasts phytoplankton distribution (orange and pink discs) and chlorophyll fluorescence intensity (color-coded M-shaped curves) between offshore and coastal marine environments across a 0-200 m depth profile. In offshore waters, phytoplankton are sparser at the surface but form a subsurface maximum around 100 m, correlating with a blue fluorescence peak; coastal waters exhibit high surface concentrations and a shallower fluorescence peak near 50 m due to nutrient availability and light penetration. The sun icon indicates surface irradiance driving photosynthesis.

Used in oceanography education, marine biology textbooks, or environmental science webpages to explain primary productivity gradients; targets students, researchers, and policymakers seeking to understand coastal eutrophication vs. oligotrophic offshore systems.