Final answer:
It is true that disturbance forces can have significant immediate effects on ecosystems, altering their natural communities. These can be natural disturbances or human-induced, both affecting ecosystem health and dynamics.
Step-by-step explanation:
Disturbance forces can indeed have very large and immediate effects on ecosystems, which can substantially alter an ecosystem's natural community. This statement is true. Ecosystems experience both natural disturbances, like lightning-caused forest fires, which initiate a process known as succession, and human-induced disturbances, such as deforestation and pollution. These disturbances can affect the health of ecosystems, their ability to recover, and the balance of populations, communities, and ecosystem dynamics.
Human activities, in particular, can have a significant impact, leading to challenging conservation issues. Practices like overfishing, agricultural expansion, and air pollution contribute to the degradation of ecosystems. Such disturbances may not only have immediate effects but can also lead to long-term consequences for the resilience, productivity, and structural integrity of ecosystems.