However, while California red-legged frogs may be subject to factors causing worldwide amphibian declines, the decline in California red-legged frog populations is also a result of habitat loss and alteration, over 
(California red-legged frogs; may be; subject to factors) (factors; causing; worldwide amphibian declines) (the decline in California red-legged frog populations; is also; a result of habitat loss and alteration)
California red-legged frogs factors the decline in California red-legged frog populations
may be causing is also
subject to factors
worldwide amphibian declines
a result of habitat loss and alteration