As in other areas of conservation, the crucial question concerning plant
biodiversity isn't whether to conserve but how best to conserve
diversity at the different levels of biological organization--the gene,
the species and the community. Conservation biology is faced with
several controversial issues, such as the dichotomy between the
preservation of individual species versus a broader focus on the
environment, the relative importance to give to endangered species, the
design and management of reserves, and the drive for increasing
agricultural productivity through plant improvement versus the drive to
maintain traditional peasant varieties in cultivation. These and other
issues are dealt with here by emphasizing and exploring the underlying
scientific principles. The conservation of whole communities emerges as
the paramount strategy for maintaining the evolutionary potential of
plant life.