Abstract
AbstractFloodplains of unregulated rivers alternate between aquatic and terrestrial phases, resulting in temporary aquatic habitats. If aquatic invertebrates are to take advantage of such habitats, they must be capable of rapid colonization and growth. Aerial immigration is one means of colonization and may include active dispersal by reproductive and nonreproductive adult insects and passive dispersal of other invertebrates. The aquatic invertebrate assemblage that could develop from aerial colonization during the time of a flood was investigated with floating colonization trays containing natural detritus and water on the water surface of a southeastern USA floodplain during 5 flooded periods in a year. Density and biomass of aquatic invertebrates that resulted from aerial colonization were measured after 17 d. Minimum growth rates and potential secondary production of several chironomid taxa were measured based on increases in larval size during this time period. Egg-mass collection trays, similar to c...
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