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Field stations should assume a more active role in the preservation of species diversity and intraspecific genetic variation. Because some field stations concentrate scientists in remote places far from major universities, they are often the only source of biological expertise in the area. Others, located in more densely populated regions, may contain the last surviving remnants of natural ecosystems there. Field stations should locate and identify local populations of rare or endangered species and take the necessary steps for their preservation, begin long-term research on the population biology of these species, and offer conservation-oriented courses to students and the general public. (Accepted for publication 23 February 1982) [ABSTRACT FROM AUTHOR]