Soluble salts dynamics in the soil under different climatic conditions |
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| Authors: | Sarah Pariente |
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| Institution: | 1. Department of Earth Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China;2. Council for Geoscience, Limpopo Unit, Polokwane, South Africa;3. Beijing SHRIMP Centre, Chinese Academy of Geological Sciences, Beijing, China;4. Department of Geosciences, University of Mainz, 55099 Mainz, Germany;1. Departamento de Ciencia y Tecnología Agraria, Universidad Politécnica de Cartagena, Paseo Alfonso XIII, 48, 30203, Cartagena, Spain;2. Department of Ecological Science, Faculty of Earth and Life Sciences, VU University, De Boelelaan 1085, 1081 HV, Amsterdam, The Netherlands;3. Soil Protection Group, Institute of Terrestrial Ecosystems, ETH Zürich, Universitaetstrasse 16, 8092 Zürich, Switzerland;1. School of Environmental Studies, China University of Geosciences, 388 Lumo Rd, Wuhan, 430074, China;2. Chinese Academy of Geological Sciences, Beijing, 100037, China;3. Qingdao Institute of Marine Geology, Qingdao, 266071, China;4. Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, China;5. The Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and Resources, Qingdao, 266071, China;6. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China |
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| Abstract: | The dynamics of soluble salts concentration in the soil was investigated at seven research stations in Israel that represent four climatic regions: Mediterranean, semi-arid, mildly arid and arid. Measurements were taken in different seasons from soils that were developed on hillslopes, which are consisted of hard calcareous rocks. The relationship between the soluble salts content and rainfall was found to be non-linear. An abiotic threshold, which is characterized by a sharp change in the soluble salts content, exists around 200 mm isohyet: sites that receive less than 200 mm rainfall are characterized by significantly high soluble salts content whereas sites that receive more than 200 mm are characterized by very low soluble salts content. Each side of this abiotic threshold expresses typical behavior that can be defined as “environmental signature”. At the “dry” side of the threshold temporal heterogeneity, rate of change, potential of change and differences between layers are higher than those at the “wet” side of the threshold. |
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| Keywords: | Soluble salts concentration Temporal variations Land degradation Mediterranean climate Semi-arid climate Arid climate |
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