One for the Books: The 2021 Emergence of the Periodical Cicada Brood X (original) (raw)
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The 1999 Emergence of the Periodical Cicadas in Ohio (Homoptera: Cicadidae: Magicicada spp. Brood V)
1999
The periodical cicadas belonging to Brood V emerged in 1999 over most of eastern Ohio. The emergence was widespread and heavy in the southeastern portion of the state and in Summit, Medina, and southern Cuyahoga counties. The brood is experiencing a recession along its western boundary, which is as much as 10 miles eastward from its 1914 western boundary. The brood is also declining in parts of Wayne, Holmes, Stark, and Tuscarawas counties. Ohio Biological Survey Notes 2: 43-47, 1999. © Ohio Biological Survey
2005
Periodical cicadas belonging to Brood X emerged in parts of western Ohio and throughout most of Indiana in 2004. The first emerging cicadas were found on 9 May. Most areas were reporting emerging cicadas by 14 May, one week earlier than the average historical emergence date of 20/21 May. Average April temperatures were found to predict the day in May when the emergence would begin. The average soil temperature on the morning after the emergence began was 18.3 °C. Periodical cicadas were observed dispersing into areas that had been cleared since the previous emergence. Some periodical cicadas belonging to Brood XIV emerged four years early, joining the eastern edge of Brood X. Approximately 85.3% of the eggs laid in deciduous trees hatched, and some of the nymphs had molted to the second instar by 3 1 December 2004.
The Ecology, Behavior, and Evolution of Periodical Cicadas
Annual Review of Entomology, 1995
Periodical cicada nymphs feed underground on root xylem fluids for precisely 13 or 17 years before emerging at any given locality synchronously and in tremendous numbers. Populations throughout the eastern United States are grouped into variously sized, geographically contiguous broods, which are reproductively isolated from each other. Six distinct species represent the 13and 17-year life cycle forms of three morphologically and behaviorally distinct periodical cicadas. Recent work supports and modifies previous hypotheses concerning periodical cicada intra-and interspecific interactions, movement patterns, juvenile development rates, life-cycle switching, the evolution of periodicity, and the origination of broods and species. Major ecological interactions of perio~lical cicadas include infection by a host-specific fungal pathogen, 'satiation of predators, and damage to hostplants. Central to the evolution of periodical cicadas are four-year accelerations in development that sometimes result in switching between 13-and 17-year life cycles. BACKGROUND Periodical cicadas of the genus Magicicada (Homoptera: Cicadidae).have fascinated biologists since they were first discussed in the scientific literature