What concept explains how organisms relate through food webs and competition?

The concept of ecosystem interaction encompasses the various ways in which organisms within an ecosystem relate to each other, particularly through their feeding relationships and competition for resources. In an ecosystem, food webs illustrate the intricate feeding connections between different organisms, showing how energy flows from one level to the next, whether through producers, herbivores, or predators.

Additionally, competition among organisms can occur for limited resources such as food, habitat, and mates, influencing population dynamics and the structure of communities within the ecosystem. This term captures both the predatory and competitive aspects of these relationships, highlighting the interconnectedness of organisms and their environments. Understanding ecosystem interactions is crucial for comprehending ecological balance and the health of biological communities.

Other concepts listed, like population genetics, focus on genetic variation within populations, survival of the fittest relates to natural selection, and adaptive radiation describes how species evolve to fill different ecological niches, but they do not comprehensively cover the relationships driven by food webs and competition as effectively as ecosystem interaction does.