You can structure the sentence differently, and maybe it will help. "Positioning" is wrong, but maybe it will sound more wrong if you say it differently.
1a: (original)
Positioning at the top of the food chain,
the Bengal tiger of southern India
has no predators except man.
1b:
The Bengal tiger of southern India,
positioning at the top of the food chain,
has no predators except man.
2a: (original)
Positioned at the top of the food chain,
the Bengal tiger of southern India
has no predators except man.
2b:
The Bengal tiger of southern India,
positioned at the top of the food chain,
has no predators except man.