Comparative elemental stoichiometry of ecologically diverse Drosophila
Article first published online: 28 FEB 2003
Volume 17, Issue 1, pages 115–120, February 2003
How to Cite
Jaenike, J. and Markow, T. A. (2003), Comparative elemental stoichiometry of ecologically diverse Drosophila. Functional Ecology, 17: 115–120. doi: 10.1046/j.1365-2435.2003.00701.x
- Issue published online: 28 FEB 2003
- Article first published online: 28 FEB 2003
- Received 28 March 2002; revised 19 August 2002; accepted 6 September 2002
- 1Chemical analyses of ecologically diverse species of Drosophila reveal substantial variation among them in their nitrogen and phosphorus contents, determined as a percentage of adult dry mass. Across Drosophila species, the nitrogen content of flies is positively correlated with phosphorus content.
- 2For both N and P, the concentration in the flies is correlated with that of their breeding sites. The variation in the elemental composition of breeding sites, and therefore of the flies themselves, may affect the ecology and life-history variation of Drosophila.
- 3The range of variation in N and P contents and the N : P ratio is considerably less among Drosophila than among their breeding sites, indicating that there is substantial constancy for elemental composition across Drosophila species. The N : P ratio varies somewhat among species, indicating that the nitrogen and phosphorus contents do not change in perfect proportion across species.
- 4An important, but unanswered, question concerns the relation between intraspecific homeostasis and interspecific constancy for elemental composition. Three possible mechanisms by which such interspecific constancy is brought about are discussed.