Allometric and Phylogenetic Variation in Insect Phosphorus Content

• Published in: Functional ecology 2004-02, Vol.18 (1), p.103-109
• Main Authors: Woods, H. A., Fagan, W. F., Elser, J. J., Harrison, J. F.
• Format: Article
• Language: English
• Subjects: Allometry; Animal and plant ecology; Animal physiology; Animal, plant and microbial ecology; Autoecology; Biological and medical sciences; Biological taxonomies; Body size; Desert insects; Diptera; exoskeleton; Fundamental and applied biological sciences. Psychology; General aspects; Herbivores; Human ecology; Insect ecology; Lepidoptera; Panorpida; Phosphorus; phosphorus limitation; Phytophagous insects; stoichiometry; Taxa
• ISSN: 0269-8463; 1365-2435
• DOI: 10.1111/j.1365-2435.2004.00823.x

1. Phosphorus content was measured in adult insects and arachnids from 170 species collected in the Sonoran Desert. 2. Across insect body sizes spanning four orders of magnitude, phosphorus content was inversely related to body mass. The largest species (∼1 g dry) had phosphorus contents that were only about 60% (0.62% P absolute) as high as phosphorus contents of the smallest species (∼0.0001 g dry; 0.97%P). Negative phosphorus allometry was observed within each of seven insect orders and within arachnids. 3. Phosphorus contents of insect predators and herbivores were statistically indistinguishable. 4. More recently derived orders tended to have lower phosphorus contents -- with the exception of the most recently derived group (Panorpida = Diptera + Lepidoptera), which had high phosphorus contents.