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The interactive effects of herbivory and fire on an oligohaline marsh, Little Lake, Louisiana, USA

Wetlands volume 14, pages 82–87 (1994)Cite this article

Abstract

Herbivory and fire have been shown to affect the structure and composition of marsh communities. Because fire may alter plant species composition and cover, and these alterations may have an effect on herbivore populations or foraging patterns, an interactive effect of herbivory and fire may be expected. In this study, the effects of fire and vertebrate herbivory in a Louisiana oligohaline marsh were studied using small, controlled burns and animal exclosures. Mean total biomass was nearly 2 times greater in the plots protected from herbivory than in the plots subject to natural herbivory. Additionally, mean total biomass was over 1.5 times greater in the plots that remained unburned than in those that were burned. Two dominant perennial species,Spartina patens andScirpus olneyi, were negatively affected by herbivory, but two annual sedges,Cyperus flavescens andCyperus odorata, were positively affected. Burning reduced the aboveground biomass ofSpartina patens andBacopa monnieri. No species increased in biomass as a result of fire. No significant differences were found in species richness between herbivory treatments or between fire treatments. Although both herbivory and fire were found to cause significant changes in the vegetation, the interaction between herbivory and fire was not found to produce any significant effects in any test conducted.

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Authors and Affiliations

  1. Department of Biology and Center for Marine and Wetland Studies, Coastal Carolina University, 29526, Conway, SC, USA

    Katherine L. Taylor

  2. U.S. National Biological Survey, National Wetlands Research Center, 70506, Lafayette, LA, USA

    James B. Grace, Glenn R. Guntenspergen & A. Lee Foote

Authors
  1. Katherine L. Taylor
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  2. James B. Grace
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  3. Glenn R. Guntenspergen
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  4. A. Lee Foote
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Taylor, K.L., Grace, J.B., Guntenspergen, G.R. et al. The interactive effects of herbivory and fire on an oligohaline marsh, Little Lake, Louisiana, USA. Wetlands 14, 82–87 (1994). https://doi.org/10.1007/BF03160624

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  • DOI: https://doi.org/10.1007/BF03160624

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