Process · Glossary
Energy Flow
Also: EFI, Energy Flow Index, Solar Flow
Definition
How effectively sunlight is being captured and turned into living tissue across a piece of land. The first of the four ecosystem processes.
Energy Flow is the first of the four ecosystem processes that underpin all terrestrial life. Sunlight is the only energy input most ecosystems get; everything else (biomass production, soil carbon, decomposition, animal life) runs on what that sunlight is converted into through photosynthesis.
The diagnostic question is simple: of all the photons falling on this piece of land, how many are being captured by living tissue and turned into bio-available energy? A field with continuous, varied, healthy green canopy is converting most of the available energy. A field with long bare-soil periods, patchy cover, or stressed vegetation is leaking sunlight back to space and producing less life as a result.
EcoIntel’s Energy Flow Index (EFI) scores this from 0–100 per field, drawing on satellite measures of greenness (NDVI, EVI), red-edge chlorophyll (where greenness saturates), live-vs-dead cover, and seasonal continuity. The score is weather-corrected, so the EFI tracks how well the land is doing relative to its possible best in any given week, not the raw signal that swings with rainfall and temperature.
A high EFI is the prerequisite for everything downstream: carbon accumulation, soil structure, food-chain support, water-cycle function. When EFI is the limiting indicator for a field, the conversation is about cover, seasonality, root depth and species composition, not about applying inputs.