What is a common cause of deterioration in natural fiber ropes?

Mildew is a common cause of deterioration in natural fiber ropes due to the organic nature of the fibers. Natural fibers, such as hemp or cotton, are susceptible to fungal growth when exposed to moisture and warmth. When these conditions are present, mildew can thrive, leading to the breakdown of the fibers and significantly reducing the rope's strength and integrity. This degradation not only compromises the rope's performance but also poses safety risks when the rope is used in critical situations, such as firefighting or rescue operations. Other factors, such as sunlight, mechanical stress, and water exposure, can also affect natural fiber ropes, but mildew specifically represents a biological deterioration process that is particularly damaging to their longevity and functionality.