An oligotroph is an organism that can live in an environment that offers very low levels of nutrients. They may be contrasted with copiotrophs, which prefer nutritionally rich environments. Oligotrophs are characterized by slow growth, low rates of metabolism, and generally low population density. The adjective oligotrophic may be used to refer to...
<biology, ecology> Organisms that can grow in environments poor in nutrients. ... (18 Nov 1997) ... 
Organism that can grow in an environment poor in nutrients.
organism capable of living in low-nutrient environments