Pollen Dispersal by Hawkmoths in a Lindenia rivalis Benth. Population in Belize

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Abstract
This report deals with a brief study of pollen dispersal in the tropical shrub L. rivalis Benth. (Rubiaceae) which usually grows in scattered linear populations along streams. The work was done on June 18-20, 1973 in the Columbia Forest (Toledo District), Belize. There is a rapid drop-off in pollen movement beyond 10 m. Pollen movement was much greater on the clear, warmer night, presumably because of increased hawkmoth activity. The hawkmoths were provided the opportunity to deviate from the stream by placing Lindenia branches in buckets of water on a path in the forest 15 and 25 m from dyed, stream-side flowers. None of the 36 flowers checked the next morning had dyed pollen, suggesting that these hawkmoths follow a prescribed route from which they do not deviate.

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