, Volume 78, Issue 3, pp 430–431 | Cite as

Response of grasshoppers (Orthoptera: Acrididae) to livestock grazing in southeastern Arizona: differences between seasons and subfamilies

  • Karen Jepson-Innes
  • Carl E. Bock
Short Communications


Grasshopper densities were compared between grazed and ungrazed semidesert grassland sites in southeastern Arizona. Bouteloua-dominated perennial grass cover was about 1.5 times greater on the livestock exclosure. Grasshoppers were 3.7 times more abundant on the protected area in the summers of 1983 and 1984, when dominant species were grass-feeding members of the subfamily Gomphocerinae. In fall 1984, grasshoppers were 3.8 times more common on the grazed site, when dominants were mainly herb-feeders in the subfamily Melanoplinae. These results indicate important seasonal and taxonomic differences in the responses of grasshoppers to the activities of vertebrate grazers.

Key words

Acrididae Arizona grasshoppers grazing 


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Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • Karen Jepson-Innes
    • 1
  • Carl E. Bock
    • 1
  1. 1.Department of Environmental, Population, and Organismic BiologyUniversity of ColoradoBoulderUSA
  2. 2.Department of BiochemistryUniversity of CaliforniaBerkeleyUSA

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