Cited by 65Isotope Analysis in EcologyEcology and Vegetation Dynamics StudiesAnimal Ecology and Behavior Studies

Coupling of canopy and understory food webs by ground-dwelling predators.

Pringle, Robert M., Fox‐Dobbs, Kena·2008·Ecology Letters

Abstract

Understanding food-web dynamics requires knowing whether species assemblages are compartmentalized into distinct energy channels, and, if so, how these channels are structured in space. We used isotopic analyses to reconstruct the food web of a Kenyan wooded grassland. Insect prey were relatively specialized consumers of either C3 (trees and shrubs) or C4 (grasses) plants. Arboreal predators (arthropods and geckos) were also specialized, deriving c. 90% of their diet from C3-feeding prey. In contrast, ground-dwelling predators preyed considerably upon both C3- and C4-feeding prey. This asymmetry suggests a gravity-driven subsidy of the terrestrial predator community, whereby tree-dwelling prey fall and are consumed by ground-dwelling predators. Thus, predators in general couple the C3 and C4 components of this food web, but ground-dwelling predators perform this ecosystem function more effectively than tree-dwelling ones. Although prey subsidies in vertically structured terrestrial habitats have received little attention, they are likely to be common and important to food-web organization.

Integrity signals

Registry

Crossref · 10.1111/j.1461-0248.2008.01252.x

Cites

59 of 59 references verified0 citation errors · 0 not checkable

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  • Miscategorizations of predators as prey represented a small fraction (~5%) of all insects.

    “Although this categorization slightly undercounts predators by excluding some predators from trophically mixed orders such as Coleoptera, a previously published stable-isotope analysis of these same samples [17] showed that such miscategorizations represented a small fraction (∼5%) of all insects.”
  • Lygodactylus keniensis preys almost exclusively on tree-feeding insects, excepting workers of the Acacia-ant species.

    “Lygodactylus keniensis is diurnal and exclusively arboreal, and males are territorial; along with the arthropod arboreal predators in the system, it preys almost exclusively on tree-feeding insects [17], excepting workers of the Acacia-ant species [18].”

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Research works printed but not linked: 1

  1. Schimmelmann A., 1986, Stable isotopic studies on chitin II. The 13C/12C and 15N/14N ratios in arthropod chitin, Contrib. Mar. Sci., 29, 113

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Authors
Pringle, R. M., & Fox‐Dobbs, K.
Affiliations
  • Stanford University (US)
  • University of Wyoming (US)
Corresponding author
  • Pringle, Robert M.
  • Fox‐Dobbs, Kena
Venue
Ecology Letters
Publisher
Wiley
Published
2008-11-05
Volume
11
Issue
12
Pages
1328-1337
ISSN
  • 1461-023X (ISSN-L)
  • 1461-0248
OpenAlex
W2105519837
Cited by
65
References
57
Citations by year
2026: 2 · 2025: 1 · 2024: 4 · 2022: 6 · 2021: 6 · 2020: 3 · 2019: 2 · 2018: 6 · 2017: 2 · 2016: 3 · 2015: 3 · 2014: 5 · 2013: 2 · 2012: 8
FWCI
3.21
Type
journal article
Language
en
Open access
closed
Locations
  • Ecology Letters (publishedVersion)
  • PubMed (publishedVersion)
  • Sound Ideas (University of Puget Sound) (submittedVersion)
Topics
  • Physical Sciences › Environmental Science › Ecology › Isotope Analysis in Ecology
  • Physical Sciences › Environmental Science › Nature and Landscape Conservation › Ecology and Vegetation Dynamics Studies
  • Physical Sciences › Environmental Science › Ecology › Animal Ecology and Behavior Studies
Keywords
ground-dwelling predators, C3 and C4 plants, isotopic niche, geckos, wooded grassland, energy channels
MeSH terms
Animals, Diet, Predatory Behavior, Trees, Food Chain

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