Population fluctuations in complex life cycles: an example from Pemphigus aphids

N. A. Moran, Thomas G Whitham

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Manipulations of conditions and long-term data on abundances were used to investigate the bases of year-to-year fluctuations in population size in the aphid Pemphigus betae, which has a complex life cycle. Spring generations may live in leaf galls on cottonwood Populus trees, whereas summer generations obligately inhabit roots of herbaceous Rumex and Chenopodium species. Soil moisture affects aphid survival and reproduction on roots. The importance of this single factor in governing population size is further supported by 6 yr of gall-density and weather data showing a strong relationship between gall abundance and the amount of rainfall the previous season. Weather affects success on summer hosts and consequently determines numbers of migrants returning to cottonwoods and gall abundances during the subsequent spring. -from Authors

Original languageEnglish (US)
Pages (from-to)1214-1218
Number of pages5
JournalEcology
Volume69
Issue number4
StatePublished - 1988
Externally publishedYes

Fingerprint

Pemphigus (Aphididae)
gall
galls
aphid
Aphidoidea
life cycle (organisms)
life cycle
Pemphigus betae
population size
leaf galls
Chenopodium
Rumex
summer
Populus
weather
meteorological data
soil water
rain
soil moisture
rainfall

ASJC Scopus subject areas

  • Ecology

Cite this

Population fluctuations in complex life cycles : an example from Pemphigus aphids. / Moran, N. A.; Whitham, Thomas G.

In: Ecology, Vol. 69, No. 4, 1988, p. 1214-1218.

Research output: Contribution to journalArticle

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