What percentage of total global productivity do C4 plants contribute?

C4 plants are a group of plants that utilize a unique photosynthetic pathway, which is highly efficient in terms of carbon fixation, especially in conditions of high light intensity, high temperatures, and low atmospheric CO2 levels. They have adapted to thrive in environments that are often less conducive to C3 plants, which are more common in cooler, wetter climates.

Research indicates that C4 plants account for approximately 25% of total global productivity, despite occupying only a small fraction of the Earth's surface. This efficiency enables them to contribute significantly to biomass production, agricultural yields, and ecosystem productivity in various habitats, particularly grasslands and savannas. Their role in global productivity underscores their ecological importance and adaptability.

In contrast, the other percentages do not accurately reflect the recognized contribution of C4 plants to global productivity based on scientific studies.