Impact of cultivation management in an agroecosystem on hot spot effects of earthworm middens |
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| Authors: | Stefan Schrader Christian Seibel |
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| Institution: | 1. Université Lille Nord de France, Lille, France;2. Laboratoire Génie Civil et géo-Environnement (LGCgE) Université de Lille, Univ. Lille 1, Équipe Fonctionnement des Ecosystèmes Terrestres Anthropisés, Bâtiment SN3, Cité Scientifique, F-59655 Villeneuve d’Ascq, Cedex, France;3. Ecole Supérieure du Professorat et de l’Education (ESPE), Site d’Arras, 7 bis rue Raoul François, BP 30927, F-62022 Arras Cedex, France;1. Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Wallingford OX10 8BB, UK;2. Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, London SW7 2AZ, UK;3. Biological and Environmental Sciences, School of Natural Sciences, University of Stirling, Stirling FK9 4LA, UK;4. School of Biosciences, University of Cardiff, Main Building, Museum Avenue, Cardiff CF10 3AT, UK;5. Centre for Ecology and Hydrology, Library Avenue, Bailrigg, Lancaster LA1 4AP, UK;1. Department of Physics, Semiconductor Researh Laboatory, Faculty of Engineering and Technology (ITER), Siksha ‘O′ Anusandhan (Deemed to be University), Bhubaneswar 751030, Odisha, India;2. UGC-DAE Consortium for Scientific Research, Indore 452017, Madhya Pradesh, India;3. Department of Physics, College of Basic Science and Humanities, Odisha University of Agriculture and Technology, Bhubaneswar 751003, Odisha, India;4. Department of Physics, Maharaja Sriram Chandra Bhanja Deo University (Formerly North Orissa University), Baripada 757003, Odisha, India;1. Thermofisher Scientific Corporation, Beijing 100080, China;2. Key Lab of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;3. Thermofisher Scientific Corporation, Chelmsford 01824, USA;1. Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;2. College of Environmental Science and Engineering, Anhui Normal University, Wuhu 241003, China;3. Department of Environmental Health Science, University of California, Berkeley, CA 94720, USA;4. State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, China |
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| Abstract: | In comparison to the surrounding soil, hot spot effects of middens of the epianecic earthworm Lumbricus terrestris were determined under different field conditions on a loamy sand. The impact of 3 different management systems was studied: 1. unmulched; 2. straw mulching; 3. intermediate crop: Sinapis alba. Furthermore, we considered 2 different crops (bean, lupine) and their growth stages. We monitored different enzyme activities and abiotic parameters of soil at 6 sampling dates between April and August 1998 parallel to abundances of microfauna (soil protozoa) and mesofauna (Enchytraeidae, Collembola, mites). The analysis of earthworm middens revealed enhanced enzyme activities and increased mesofaunal abundances. Differences between midden and reference samples were significant during the whole vegetation period and became maximal during ripening of crops. We found a distinct but not significant increase in individual numbers of soil flagellates in midden areas during leafing and heading of crops. Values of the studied parameters tended to be higher in bean plots but generally the crop impact on midden properties was not significant. Our results showed a significant positive synergistic effect between earthworm middens and intermediate crop. Straw mulching supported the hot spot effects of middens. |
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| Keywords: | agricultural management Collembola earthworm middens Enchytraeidae soil mites soil protozoa |
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