depauperate
/diːˈpɔːpəreɪt/adjective
1- Biology (of a flora, fauna, or ecosystem) lacking in numbers or variety of species【生】（植物区系、动物区系或生态系统）萎缩的, 衰弱的：
oceanic islands are generally depauperate in mayflies.
海洋岛屿一般少见浮游生物。
1.1
- (of a plant or animal) imperfectly developed（植物, 动物）发育不全的。
词源
late Middle English （in the sense 'impoverished'）： from medieval Latin depauperatus, past participle of depauperare, from de- 'completely' + pauperare 'make poor' （from pauper 'poor'）.