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Seasonal Temperature Alone Can Synchronize Life Cycles

โœ Scribed by James A. Powell; Janette L. Jenkins; Jesse A. Logan; Barbara J. Bentz

Book ID
102566572
Publisher
Springer
Year
2000
Tongue
English
Weight
245 KB
Volume
62
Category
Article
ISSN
1522-9602

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โœฆ Synopsis

In this paper we discuss the effects of yearly temperature variation on the development and seasonal occurrence of poikiliothermic organisms with multiple life stages. The study of voltinism in the mountain pine beetle (Dendroctonus ponderosae Hopkins), an important forest insect living in extreme temperature environments and exhibiting no diapause, provides a motivational example. Using a minimal model for the rates of aging it is shown that seasonal temperature variation and minimal stage-specific differences in rates of aging are sufficient to create stable uni-and multi-voltine oviposition cycles. In fact, these cycles are attracting and therefore provide an exogenous mechanism for synchronizing whole populations of organisms. Structural stability arguments are used to extend the results to more general life systems.

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โœ Janette L. Jenkins; James A. Powell; Jesse A. Logan; Barbara J. Bentz ๐Ÿ“‚ Article ๐Ÿ“… 2001 ๐Ÿ› Springer ๐ŸŒ English โš– 933 KB

In this paper we discuss how seasonal temperature variation and life-stage specific developmental thresholds that cause quiescence can synchronize the seasonal development of exothermic organisms. Using a simple aging model it is shown that minimal seasonal temperature variation and periods of quies