Response of soil micro- and mesofauna to diversity and quality of plant litter |
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| Institution: | 1. The James Hutton Institute, Craigiebuckler, Aberdeen, AB15 8QH, UK;2. Department of Ecology, Swedish University of Agricultural Sciences, Ulls väg 16, 75651 Uppsala, Sweden;1. Department of Bioscience, Faculty of Science and Technology, Aarhus University, Vejlsøvej 25, 8600 Silkeborg, Denmark;2. Department of Agroecology, Faculty of Science and Technology, Aarhus University, Blichers Allé, 8830 Tjele, Denmark;3. Department of Chemical Engineering, Technical University of Denmark, Frederiksborgvej 399, 4000 Roskilde, Denmark;1. Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China;2. Key Laboratory of Ecological Restoration, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China;3. Institute of Botany, Chinese Academy of Sciences, State Key Laboratory of Vegetation and Environmental Change, Beijing 100093, China;4. German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Deutscher Platz 5e, 04103 Leipzig, Germany;5. Institute of Biology, University of Leipzig, Johannisallee 21, 04103 Leipzig, Germany;6. School of Geographical Sciences, Guangzhou University, Guangzhou 510006, China;1. State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, PO Box 417, Shenyang 110164, China;2. Netherlands Institute of Ecology (NIOO-KNAW), PO Box 50, 6700 AB Wageningen, The Netherlands;3. Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China;4. Sinofert Holdings Limited, Henan Branch, Zhengzhou 450000, China;5. University of Chinese Academy of Sciences, Beijing 100049, China;1. German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Deutscher Platz 5e, 04103 Leipzig, Germany;2. Center for Environmental Research and Technology, General and Theoretical Ecology, University of Bremen, Leobener Str, 28359 Bremen, Germany;3. Institute of Biology, University of Leipzig, Deutscher Platz 5e, 04103 Leipzig, Germany;4. Institute of Ecology, Friedrich Schiller University Jena, Dornburger Strasse 159, 07743 Jena, Germany;5. Department of Silviculture, Faculty of Environment and Natural Resources, University of Freiburg, Tennenbacherstrasse 4, 79106 Freiburg, Germany;6. Geobotany, Faculty of Biology, University of Freiburg, Schänzlestr. 1, 79104 Freiburg, Germany;7. Institute of Biology/Geobotany and Botanical Garden, Martin Luther University Halle Wittenberg, Am Kirchtor 1, 06108 Halle (Saale), Germany;8. Institute for Terrestrial Ecosystems, Department of Environmental Systems Science, ETH Zurich, Universitaetsstrasse 16, 8092 Zurich, Switzerland;1. State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110164, PR China;2. Huitong Experimental Station of Forest Ecology, Chinese Academy of Sciences, Huitong 418307, PR China;3. University of Chinese Academy of Sciences, Beijing 100049, PR China;4. Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China |
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| Abstract: | The abundance and functional structure of soil micro- (nematodes) and mesofauna (collembolans and mites) in relation to species diversity and initial C:N ratio of plant litter were studied in a field mesocosm experiment. A total of five litter treatments were applied to generate an increasing diversity of plant species (one, three and 12 species) and/or differences in initial C:N ratio of the litter (low, intermediate and high ratio). Samples were taken 3, 6 and 24 months after the litter exposure. On each sampling date litter and underlying sand samples were taken. Our results showed that litter quality, but not litter diversity was the factor which affected the three animal groups under study. The effect of litter was dependent on the time of litter exposure. Nematode fauna colonized litter earlier than the two mesofaunal groups. Nematodes responded apparently to litter quality gradient at early stages of litter decomposition. Three months after the start of the experiment the highest density of nematodes was noticed in single species litter of Trifolium pratense. Bacterial-feeding nematodes dominated in all litter treatments; on the first sampling date their percent share in Trifolium litter reached even 99.9%. Opposite to nematodes at late stages of litter decomposition the two mesofaunal groups seemed to show some preferences for low quality litter of Festuca rubra. Collembolan and nematode diversity was affected in similar way by the litter quality; the lowest diversity of the animal communities was found in the litter of the lowest initial C:N ratio. Maturity index of nematode communities was found to be a good index to differentiate between litters of different quality. The abundance and community structure of the three animal groups in underlying sandy soil was not significantly influenced by experimental conditions. |
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