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Title: Impact of timber harvest on species accumulation curves for oak herbivore communities of the Missouri Ozarks

Author: Marquis, Robert J.; Forkner, Rebecca; Lill, John T.; Le Corff, Josiane;

Date: 2002

Source: In: Shifley, S. R.; Kabrick, J. M., eds. Proceedings of the Second Missouri Ozark Forest Ecosystem Project Symposium: Post-treatment Results of the Landscape Experiment. Gen. Tech. Rep. NC-227. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station. 183-195.

Publication Series: Other

   Note: This article is part of a larger document. View the larger document

Description: We report the effects of two timber harvest methods, even-aged and uneven-aged harvest, versus no harvest on species accumulation curves for leaf-chewing herbivores of Quercus alba and Q. velutina in the Missouri Ozarks. The study was part of a larger project, the Missouri Ozark Forest Ecosystem Project (MOFEP). Herbivores were sampled four times during the year (early May, June, July, and late August) for each of 4 years after cutting. Species accumulation curves were generated by plotting the total number of species recorded per leaf area sampled in all stands (N=6 stands/site), within a site in May 1997, the first census of the first year following cutting, and then adding the number of new species encountered in each subsequent census through the end of 2000. Treatment effects first became apparent in 1998. Uneven-aged management tended to reduce the rate of species accumulation across years for Q. alba compared to no harvest (control) and even-aged management, although marginally so. In contrast, even-aged management significantly increased the rate of species accumulation on Q. velutina compared to no harvest, with uneven-aged curves lower than no harvest. The May and June censuses contributed most to the treatment effect for Q. alba and Q. velutina, respectively. We interpret these results to mean that the treatments either increased or decreased population size relative to controls, thus resulting in an increased or decreased probability, respectively, of sampling a species. Species accumulation curves were lower for younger forests, suggesting that continued cutting, regardless of harvesting method, will reduce species richness of this herbivore fauna.

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Citation:


Marquis, Robert J.; Forkner, Rebecca; Lill, John T.; Le Corff, Josiane 2002. Impact of timber harvest on species accumulation curves for oak herbivore communities of the Missouri Ozarks. In: Shifley, S. R.; Kabrick, J. M., eds. Proceedings of the Second Missouri Ozark Forest Ecosystem Project Symposium: Post-treatment Results of the Landscape Experiment. Gen. Tech. Rep. NC-227. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station. 183-195.

 


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