depauperate
adjective
de·pau·per·ate di-ˈpȯ-pə-rət 
1
: falling short of natural development or size
2
: impoverished
a depauperate fauna
Example Sentences
Recent Examples on the Web Anything in the Asclepias genus will feed the monarch’s caterpillars, which badly need the food in the large, milkweed-depauperate migration states of the Midwest. 
Molly Marquand, Good Housekeeping, 5 May 2017 Anything in the Asclepias genus will feed the monarch’s caterpillars, which badly need the food in the large, milkweed-depauperate migration states of the Midwest. Molly Marquand, Good Housekeeping, 5 May 2017
Molly Marquand, Good Housekeeping, 5 May 2017 Anything in the Asclepias genus will feed the monarch’s caterpillars, which badly need the food in the large, milkweed-depauperate migration states of the Midwest. Molly Marquand, Good Housekeeping, 5 May 2017 Word History
Etymology
Middle English depauperat, from Medieval Latin depauperatus, past participle of depauperare to impoverish, from Latin de- + pauperare to impoverish, from pauper poor — more at poor
First Known Use
15th century, in the meaning defined at sense 1