Final answer:
True, changes in ecosystems can affect the availability of limited resources for organisms, impacting population dynamics, resource distribution, and overall ecosystem health.
Step-by-step explanation:
The presence of limited resources in an ecosystem dictates the carrying capacity and can significantly influence the dynamics within that ecosystem. When changes in free energy availability occur, they can cause fluctuations in populations as organisms must balance energy intake with expenditure. Ecosystem dynamics can also be affected by biotic factors such as species numbers and diversity, or by abiotic factors like natural disasters, which alter the distribution of resources. Over time, the food web might suffer from temporary setbacks, such as the loss of primary producers, but can often recover, readjusting the balance of resources. However, humans are very active in modifying ecosystems, which can lead to habitat destruction and, consequently, a long-term change in resource distribution. Moreover, populations and ecosystems are part of complex interactions that involve the exchange of matter and free energy, underscoring how environmental changes, such as a decrease in energy flow, can lead to population size decline and shifts in organism distribution.