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キーワード:
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要旨:
Disturbance is a key factor shaping species abundance and diversity in plant communities. Here, we use a mechanistic
model of vegetation diversity to show that different strengths of r- and K-selection result in different disturbance-diversity
relationships. R- and K-selection constrain the range of viable species through the colonization-competition tradeoff, with
strong r-selection favoring colonizers and strong K-selection favoring competitors, but the level of disturbance also affects
the success of species. This interplay among r- and K-selection and disturbance results in different shapes of disturbancediversity
relationships, with little variation of diversity with no r- and no K-selection, a decrease in diversity with r-selection
with disturbance rate, an increase in diversity with K-selection, and a peak at intermediate values with strong r- and Kselection.
We conclude that different disturbance-diversity relationships found in observations may reflect different
intensities of r- and K-selection within communities, which should be inferable from broader observations of community
composition and their ecophysiological trait ranges.
