caa a22 4500 397570988 CHVBK 20180308164841.0 cr unu---uuuuu 161202e19960401xx s 000 0 eng 10.1093/ee/25.2.303 doi (NATIONALLICENCE)oxford-10.1093/ee/25.2.303 Mesocosm and Macrocosm Experiments to Examine Effects of Mowing Emergent Vegetation on Wetland Invertebrates [Elektronische Daten] [Ferenc A. De Szalay, Darold P. Batzer, Vincent H. Resh] Although mesocosm experiments are often used as alternatives to larger-scale experimental designs, few studies have compared the results obtained in experiments conducted at different scales. This study compares results of mesocosm and macrocosm experiments examining the responses of aquatic invertebrate communities to mowing of the emergent vegetation. In both experiments, 50% of the vegetation in stands of pickleweed, Salicornia virginica L., was mowed, which created open water and vegetated sections within the mowed treatment areas. Invertebrates were sampled epiphytically and benthically in the open water and vegetated sections in mowed treatment areas and in unmanipulated control areas. Epiphytic and benthic densities of many invertebrates were higher in vegetated sections in mowed treatment areas than in control areas. Epiphytic invertebrate densities in open water sections of mowed treatment areas were always lower than control areas. However, benthic invertebrate densities show a mixed response; densities of some species were lower in open water sections, whereas densities of other species were lower in control areas. Overall epiphytic invertebrate densities in mowed treatment areas (combining vegetated and open water densities) and control densities also showed a mixed response. Overall benthic densities were always higher in mowed treatment areas. The results in both experiments were similar and demonstrate that mesocosm experiments can predict results obtained from larger-scale experiments. Because densities of many invertebrate taxa that are consumed by waterfowl were higher in mowed areas and mosquito densities were lower in these areas, mowing can be a useful management technique in wetland habitats. © 1996 Entomological Society of America Community and Ecosystem Ecology nationallicence mosquitoes nationallicence aquatic invertebrates nationallicence marshes nationallicence mesocosm nationallicence wetlands nationallicence De Szalay Ferenc A. Department of Environmental Science, Policy and Management, University of California, Berkeley, CA 94720 aut Batzer Darold P. Department of Environmental Science, Policy and Management, University of California, Berkeley, CA 94720 aut Resh Vincent H. Department of Environmental Science, Policy and Management, University of California, Berkeley, CA 94720 aut Environmental Entomology Oxford University Press 25/2(1996-04-01), 303-309 0046-225X 25:2<303 1996 25 ee https://doi.org/10.1093/ee/25.2.303 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/ee/25.2.303 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- De Szalay Ferenc A. Department of Environmental Science, Policy and Management, University of California, Berkeley, CA 94720 aut NATIONALLICENCE 700 1- Batzer Darold P. Department of Environmental Science, Policy and Management, University of California, Berkeley, CA 94720 aut NATIONALLICENCE 700 1- Resh Vincent H. Department of Environmental Science, Policy and Management, University of California, Berkeley, CA 94720 aut NATIONALLICENCE 773 0- Environmental Entomology Oxford University Press 25/2(1996-04-01), 303-309 0046-225X 25:2<303 1996 25 ee Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford