Using a dune forest as a filtering ecosystem for water produced by a treatment plant – One decade of environmental assessment
Autor: | Nicolas Cheval, Francis Maugard, Laurent Augusto, Catherine Lambrot, Pierre Trichet, Laurence Denaix, Virginie Reynaud, Jean-Yves Cornu |
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Přispěvatelé: | Interactions Sol Plante Atmosphère (UMR ISPA), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro), Unité Expérimentale Forêt Pierroton (UEFP), Institut National de la Recherche Agronomique (INRA), Office National des Forêts (ONF), ANTEA Group |
Rok vydání: | 2018 |
Předmět: |
Irrigation
Environmental Engineering 010504 meteorology & atmospheric sciences [SDV]Life Sciences [q-bio] Manganese deficiency chemistry.chemical_element Forests Manganese deficiency (plant) Waste Disposal Fluid 01 natural sciences Soil Nutrient leaching Water infiltration Nutrient Trace metal contamination Soil pH Environmental Chemistry Waste Management and Disposal Ecosystem 0105 earth and related environmental sciences 2. Zero hunger Biomass (ecology) Topsoil Sand dune Tree dieback Phosphorus Water 04 agricultural and veterinary sciences 15. Life on land Pollution 6. Clean water Biodegradation Environmental chemistry Wastewater Agronomy [SDE]Environmental Sciences 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science France |
Zdroj: | Science of the Total Environment Science of the Total Environment, Elsevier, 2018, 640-641, pp.849-861. ⟨10.1016/j.scitotenv.2018.05.263⟩ |
ISSN: | 0048-9697 1879-1026 |
DOI: | 10.1016/j.scitotenv.2018.05.263 |
Popis: | International audience; A dune forest in SW France composed of maritime pines was irrigated with treated wastewater for a decade in an experiment (including irrigated plots versus control plots) to evaluate the environmental impact of applying wastewater on the water table, soil properties, and plants. The amount of treated wastewater (1921 mm yr−1) applied was twice the annual precipitation. Nutrient inputs were also very high, particularly nitrogen (N: 539 kg-N ha−1 yr−1), phosphorus (P: 102 kg-P ha−1 yr−1), and calcium (Ca: 577 kg-Ca ha−1 yr−1). Irrigation caused a rise in the water table, and increased its sodium (Na), NO3−, potassium (K), and calcium concentrations. Soil properties were affected by irrigation at least down to a depth of 1.2 m. After eight years of irrigation, soil pH had increased by 1.4 units, and soil available P content (POlsen) increased nearly 8-fold. In the short-term (i.e. 1–3 years), irrigation with treated wastewater improved growth, standing biomass, and the nutritional status of the vegetation. But tree dieback started in the fourth year of irrigation and worsened until the end of the monitoring period when almost all the irrigated trees were dead or moribund. The understory composition was drastically modified by irrigation, with an increase in α-biodiversity and in the biomass of herbaceous species, and a reduction in woody species abundance. The factor that best explained tree dieback was manganese nutrition (Mn): (i) the Mn content of the tree foliage was negatively affected by irrigation and below the deficiency values reported for pine species, and (ii) soil available Mn (CaCl2 extraction) decreased by half in the topsoil layer. Manganese deficiency was probably the consequence of the increase in soil pH, which in turn reduced soil Mn availability. Tree dieback was not related to either to a macronutrient deficiency or to toxicity caused by a trace element. |
Databáze: | OpenAIRE |
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