underpopulation

n.

人口不足，人口稀少；

Underpopulation in plant parasitic nematodes.
Sexual Reproduction and Underpopulation
The colonial fear of 'underpopulation' in German East Africa
Underpopulation, television economies, and the power of the geographical imagination
Malaria, miseria, and underpopulation in Sardinia: the "malaria blocks development"cultural model
Speaker Paul Ryan: Underpopulation Is Causing Financial Problems, “People Need To Have More Babies”
From Fighting Underpopulation to Curbing Population Growth: Tracing Colonial Power in German Development Interventions in Tanzania
The relationship between the fluorescence yield and the underpopulation of doublet excited states
From underpopulation to overpopulation: French perceptions of population, environment, and agricultural development in French Soudan...
Winter Commingling of Populations of Migratory Species Can Cause Breeding Range Underpopulation