Ecological stoichiometry of the black widow spider and its prey from desert, urban and laboratory populations

Patricia Trubl, James Johnson

Research output: Contribution to journalArticle

Abstract

Ecological stoichiometry (ES) offers a framework to identify the mechanisms that allow pest species to thrive following human-induced rapid environmental change (HIREC). Specifically, ES links the biochemical composition of an organism to their growth and reproduction, which influences population growth and ecosystem dynamics. We used ES to quantify the nutrient composition (C: N, C: P, and N: P) of the western black widow spider (Latrodectus hesperus) and its prey (from desert and urban) and laboratory populations. Urban field spider and cricket subpopulations exhibited spatial variation in their C: N ratios. Urban field spider C: N, C: P, and N: P ratios were significantly different from urban crickets, but in the laboratory population, spiders and cricket C: N, C: P, and N: P ratios did not vary. Relative to urban spiders, desert spiders had lower C: P and N: P, but C: N did not differ. In the laboratory population, spiders had higher C: N, C: P, N: P ratios than field-caught spiders. Moreover, cannibalism by laboratory-reared spiders lowered C: P and N: P ratios, but not C: N ratios. We suggest such intraspecific variation may be one mechanism that allows urban pests to thrive following HIREC.

Original languageEnglish (US)
Pages (from-to)18-25
Number of pages8
JournalJournal of Arid Environments
Volume163
DOIs
StatePublished - Apr 1 2019

Fingerprint

Latrodectus mactans
stoichiometry
spider
Araneae
deserts
desert
Latrodectus hesperus
Gryllidae
cricket
carbon nitrogen ratio
environmental change
pests
laboratory
pest species
cannibalism
biochemical composition
ecosystem dynamics
intraspecific variation
subpopulation
spatial variation

Keywords

  • Carbon
  • Nitrogen
  • Phosphorus
  • Spatial variation
  • Urbanization

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Earth-Surface Processes

Cite this

Ecological stoichiometry of the black widow spider and its prey from desert, urban and laboratory populations. / Trubl, Patricia; Johnson, James.

In: Journal of Arid Environments, Vol. 163, 01.04.2019, p. 18-25.

Research output: Contribution to journalArticle

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