Scleroderma is a connective tissue disorder that is characterized by insoluble collagen being formed and accumulating excessively in the tissues.
Explanation; This disorder features thickened skin that can involve scarring, blood vessel problems, varying degrees of inflammation and pain, and is normally associated with an overactive immune system. It is regarded as an autoimmune condition, as the body produces too much collagen, causing the skin and connective tissue to thicken.
I would say the answer is the first one, "They would compete with native snake species for resources, causing a decline in native snakes" I'm not 100% sure i'm right but i'm pretty sure I am right ...