You are here: Home
/ Publication Information
Title: Linking parasitic plant-induced host morphology to tritrophic interactions
Author: Mooney, Kailen A.; Geils, Brian W.; Linhart, Yan B.
Source: Annals of the Entomological Society of America. 99(6): 1133-1138.
Publication Series: Miscellaneous Publication
Description: We investigated the tritrophic interactions among southwestern dwarf mistletoe [Arceuthobium vaginatum (Willd.) Presl subsp. cryptopodum], mistletoe herbivores, and host pine (Pinus ponderosa Dougl. ex Laws. and C. Laws. variety scopulorum Engelm.) associated predators. In an observational study, we characterized differences in pine-associated arthropods and pine branch morphology between branches either parasitized by mistletoe (brooms) or not visibly infected. Compared with noninfected branches, brooms had a more reticulate branching structure, collected 36 times more dead needles and supported 1.7 times more arthropod predators. In a manipulative field experiment, we investigated whether pine-associated predators fed upon lepidopteran herbivores of mistletoe and thereby reduced herbivore damage to the parasite. Over a 30-d trial, herbivores fed upon approximately two-thirds of available mistletoe shoots. Predator removal increased herbivore survival by 56% but had no detectable effect on the level of herbivory damage. We speculate that herbivores compete for mistletoe shoots and that increased per-capita feeding compensated for predator reduction of herbivore abundance. In summary, our results demonstrate that mistletoe parasitism altered the pine arthropod community, including an increase in the density of predators that likely feed upon mistletoe herbivores.
Keywords: community ecology, detritus, indirect effect, plant morphology, tritrophic
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
- You may send email to email@example.com to request a hard copy of this publication. (Please specify exactly which publication you are requesting and your mailing address.)
XML: View XML
Mooney, Kailen A.; Geils, Brian W.; Linhart, Yan B. 2006. Linking parasitic plant-induced host morphology to tritrophic interactions. Annals of the Entomological Society of America. 99(6): 1133-1138.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility