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Population Dynamics of Male Euglossine Bees in Amazonian Forest Fragments

A. Harriett Powell and George V. N. Powell
Biotropica
Vol. 19, No. 2 (Jun., 1987), pp. 176-179
DOI: 10.2307/2388742
Stable URL: http://www.jstor.org/stable/2388742
Page Count: 4
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Population Dynamics of Male Euglossine Bees in Amazonian Forest Fragments
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Abstract

At sites near Manaus, Amazonas, Brazil we measured the impact of forest fragmentation on populations of male euglossine bees. The visitation rates of 15 species of male euglossine bees to three chemical attractants were determined for continuous forest; isolated 1, 10, and 100 ha forest fragments; and a cleared area. For most species, visitation rate declined with fragment size, even though openings separating fragments and continuous forest tended to be narrow (as little as 100 m). Pre- and post-isolation comparisons for individual fragments exhibited the same trend. Bee species attracted to scents in the clearing differed from those of the forest indicating there was little potential for forest pollination by these clearing species. These results are discussed with respect to the impact of forest fragmentation on plant species richness and the design of natural and commercial forest reserves.

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