Postflood Recolonization Pathways of Macroinvertebrates in a Lowland Sonoran Desert Stream

Abstract
Most macroinvertebrate taxa recolonizing after floods in Sycamore Creek did so via aerial pathways. After frequent winter flooding, most aerial colonists were aquatic adults (Coleoptera and Hemiptera); ovipositing adults (Ephemeroptera and Diptera) dominated after summer floods. Drift and upstream movements by relatively few taxa contributed most individuals after floods. Upstream movements were greater during high discharge than during low discharge periods. Few taxa and individuals were present in sediments below 10 cm.