How are the food webs of each of the six ecosystems different from each other?

The food webs of the six ecosystems—terrestrial, freshwater, marine, desert, grassland, and tundra—differ primarily in their producers, consumers, and environmental conditions. For instance, terrestrial ecosystems rely on plants, while marine ecosystems depend on phytoplankton. Deserts have adapted species that can survive extreme temperatures and limited water, whereas grasslands support large herbivores and their predators. Additionally, nutrient availability and climate influence the complexity and stability of food webs in each ecosystem.