Biological Invasions

, Volume 16, Issue 11, pp 2479–2488

Competition between introduced and native spiders (Araneae: Linyphiidae)

  • Jeremy D. Houser
  • Howard Ginsberg
  • Elizabeth M. Jakob
Original Paper

DOI: 10.1007/s10530-014-0679-0

Cite this article as:
Houser, J.D., Ginsberg, H. & Jakob, E.M. Biol Invasions (2014) 16: 2479. doi:10.1007/s10530-014-0679-0


The European sheet-web spider Linyphia triangularis (Araneae: Linyphiidae) has become established in Maine, where it often reaches very high densities. Two lines of evidence from previous work suggest that L. triangularis affects populations of the native linyphiid spider Frontinella communis. First, F. communis individuals are relatively scarce in both forest and coastal habitat where L. triangularis is common, but more common where L. triangularis is at low density. Second, in field experiments, F. communis species are less likely to settle in experimental plots when L. triangularis is present, and F. communis disappears from study plots when L. triangularis is introduced. Here we test two mechanisms that may underlie these patterns. First, we tested whether L. triangularis invades and usurps the webs of F. communis. When spiders were released onto webs of heterospecifics, L. triangularis was more likely to take over or share webs of F. communis than the reverse. We also observed natural takeovers of F. communis webs. Second, we explored the hypothesis that L. triangularis reduces prey availability for native species. We sampled flying prey in areas with L. triangularis and those where it had been removed, and found no effect of spider presence on measured prey density. We also found no effect of prey supplementation on web tenacity in F. communis, suggesting that F. communis movements are not highly dependent on prey availability. We conclude that web takeover is likely more important than prey reduction in driving negative effects of L. triangularis on F. communis.


Spiders Web invasion Interference competition Invasive Linyphia triangularis 

Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Jeremy D. Houser
    • 1
  • Howard Ginsberg
    • 2
  • Elizabeth M. Jakob
    • 3
  1. 1.Graduate Program in Neuroscience and BehaviorUniversity of MassachusettsAmherstUSA
  2. 2.USGS Patuxent Wildlife Research Center, Coastal Field Station, Woodward Hall-PSEUniversity of Rhode IslandKingstonUSA
  3. 3.Department of PsychologyUniversity of Massachusetts AmherstAmherstUSA

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