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Over time, the theory goes, the population of a colony declines as the neutered felines die off naturally without replacing themselves.
Among the trees that would be removed under the Fish and Wildlife Service plan would be 120-year-old Monterey cypress, a costal species with a fairly short life span that has started to die off or blow over.
Fish and Wildlife Service (FWS) and the Florida Department of Natural Resources (FDNR, now the Florida Department of Environmental Protection [FDEP]) to develop a contingency plan to address preparations for and actions necessary to respond to another die off.
In people with Parkinson's disease, dopamine-producing neurons in the substantia nigra start to die off, and the brain gradually loses control of physical movements.
The plan says the tortoise, decimated over the past two decades by a respiratory disease and facing other threats as diverse as predatory ravens and competition from grazing cattle, might die off no matter what protections are instituted.