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Effects of Forest Management Practices on Terrestrial Coleopteran Assemblages in Sand Pine Scrub

Cathryn H. Greenberg and Michael C. Thomas
The Florida Entomologist
Vol. 78, No. 2 (Jun., 1995), pp. 271-285
DOI: 10.2307/3495900
Stable URL: http://www.jstor.org/stable/3495900
Page Count: 15
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Effects of Forest Management Practices on Terrestrial Coleopteran Assemblages in Sand Pine Scrub
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Abstract

Coleopteran assemblages were sampled monthly for one year using pitfall traps in replicated sites of three 5- to 7-year-old disturbance treatments and mature forested sand pine scrub in the Ocala National Forest, Marion County, Florida. Disturbance treatments were (1) burning at high-intensity and salvage-logging; (2) clearcutting, roller-chopping and broadcast seeding, and; (3) clearcutting and bracke-seeding. Community similarity of coleopterans was high. No differences in species richness, diversity, density, or evenness were detected. Of 40 species captured, only seven were common (n > 50). Predaceous beetles were numerically dominant followed by scavengers. Few xylophagous or herbivorous coleopterans were captured, probably due to trap bias. Peaks of annual above-ground terrestrial activity varied among species. An absence of differences among treatments may reflect similar plant communities or structural habitat features. Additionally, a dearth of mature forest specialists might be predicted in systems where mature forest was historically rare due to large-scale, high-intensity, and low-frequency wildfire. /// Durante un año fueron muestreadas mensualmente comunidades de coleópteros usando trampas de suelo en sitios replicados que poseen tres tipos de tratamientos con 5 a 7 años de edad, y el matorral que crece bajo un bosque maduro de pino de arena (sand pine) en el Bosque Nacional de Ocala, en el condado de Marion, en la Florida. Los tratamientos fueron (1) quema de gran intensidad y preservación de los troncos; (2) tala, corte de los troncos en pedazos y siembra de semillas al voleo, y (3) tala y siembra de semillas en los claros talados. La similaridad de comunidades de coleópteros fué elevada. No se encontraron diferencias en riqueza de especies, diversidad, o densidad. De 40 especies capturadas solamente siete fueron comunes (n > 50). Los escarabajos depredadores fueron numéricamente dominantes, seguidos por los comedores de carroña. Fueron capturados pocos coleópteros xilófagos o herbívoros, probabemente debido a los tipos de trampas. Los picos de actvidad terrestre por encima del suelo variaron entre las especies. La falta de diferencia entre los tratamientos puede reflejar comunidades de plantas o formas de habitats estructurales similares. Adicionalmente, la falta de especialistas de bosque maduro podría ser predicha en sistemas donde el bosque maduro es históricamente raro debido al fuego a gran escala, alta intensidad y baja frecuencia.

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