Question

Prompt
Why do fluctuations in abiotic cycles have an impact on living organisms and on ecosystems as a whole?
short answer

Answer 1

Fluctuations in abiotic cycles (water, carbon, nitrogen, temperature, light, etc.) change the availability of essential resources and the physical conditions organisms need to survive and reproduce. That alters physiological performance, growth and reproduction, and can exceed species’ tolerance limits. Because species are interconnected (food webs, competition, mutualisms), these individual effects cascade into population shifts, altered community composition, changes in primary productivity, and disrupted ecosystem functions and services. Examples include drought reducing plant growth and food for herbivores, or altered nitrogen cycling causing algal blooms and oxygen loss in aquatic systems.