Size spectra of soil nematode assemblages under different land use types |
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| Affiliation: | 1. Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, PR China;2. Huanjiang Observation and Research Station for Karst Ecosystems, Chinese Academy of Sciences, Huanjiang 547100, PR China;3. Graduate University of Chinese Academy of Sciences, Beijing, PR China;1. Ghent University, Nematology Unit, K.L. Ledeganckstraat 35, 9000 Ghent, Belgium;2. University of California, Davis, Department of Entomology and Nematology, One Shields Avenue, Davis, CA 95616, USA;3. Wageningen University, Department of Soil Quality, P.O. Box 47, NL-6700 AA Wageningen, The Netherlands;1. National Observation Station of Hailun Agro-ecology System, Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin 150081 (China);1. Institute of Biology of the Komi Scientific Centre, Ural Branch of the Russian Academy of Sciences, Kommunisticheskaya str., 28, 167000, Syktyvkar, Russia;2. A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Leninsky Prospect 33, 119071, Moscow, Russia;1. Unite Graduate School of Agriculture, Tokyo University of Agriculture & Technology, 3-21-1 Ami, Ibaraki 300-0393, Japan;2. National Institute for Agro-Environmental Sciences, 3-1-3 Kannondai, Tsukuba, 305-8604, Japan;3. College of Agriculture, Ibaraki University, 3-21-1 Ami, Ibaraki 300-0393, Japan;4. Soil Ecology Research Group, Yokohama National University, 79-7 Tokiwadai, Hodogaya, Yokohama 240-8501, Japan;1. Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, PR China;2. Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, PR China;3. University of Chinese Academy of Sciences, Beijing 100049, PR China;1. Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Haikou 570102, China;2. Hainan Key Laboratory of Banana Genetic Improvement, Hainan Haikou 570102, China;3. Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 570101, China |
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| Abstract: | Although the slopes of size spectra (plots of abundance on organism size) have been widely used to assess aquatic and terrestrial communities, size spectra have not been used to assess soil nematode communities. Two forms of size spectra (one based on the average biomass of nematode genera and another based on the average biomass of nematode size classes were used to assess the soil nematode communities in managed forage land and cropland, and in naturally developed grass-shrubland and secondary forests in a karst peak-cluster depression area. R2 values were larger for size spectra based on nematode size classes than on genera. The slopes of the size spectra for total nematodes were more negative in forage land and cropland than in grass-shrubland and secondary forests, which was consistent with disturbance of the soil nematode community by agricultural management. The results suggest that size spectra analysis is applicable to soil nematodes; they can reveal different land use types and may reveal the degree to which the soil nematodes in particular and the soil community in general have been disturbed. Size spectra may be more useful if based on nematode size classes rather than on genera. |
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| Keywords: | Size spectra Soil nematode Trophic group Land use type Disturbance Biomass |
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