Abstract
Adaptation to varied habitats confers ecological versatility and the capacity for coarse-grained distribution across heterogeneous habitats, whereas ecological specialization implies a restricted pattern. Ecogeography and adaptive traits help to determine whether farmers are able to adjust their diverse crops to socioeconomic and environmental changes (a process known as in situ conservation) or whether they are led to abandon them. Abandonment adds to the likelihood of local extinctions (genetic erosion). Versatility and specialization, and the corresponding ecogeography traits, thus require different strategies for the conservation of agricultural biodiversity, which is a primary goal of sustainable development. The diversity and farming of Andean potatoes offer a useful ex-
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