خيارات البحث
النتائج 1 - 10 من 18
Critical metal concentrations for forest soil invertebrates. A review of the limitations.
1989
Bengtsson G. | Tranvik L.
Fate of chlordecone in soil food webs in a banana agroecosystem in Martinique
2024
Coulis, Mathieu | Senecal, Julie | Devriendt-Renault, Yoann | Guérin, Thierry | Parinet, Julien | Pak, Lai-Ting
Large quantities of chlordecone-based insecticides were produced and used throughout the world. One of its most important uses was to control the damage caused by Cosmopolites sordidus in banana-growing regions. In the islands of Martinique and Guadeloupe, 18,000 ha of farmland are potentially contaminated. Despite the key role played by soil macrofauna in agroecosystems, there are currently no data on their contamination. The aim of this study was to explore the fate of chlordecone (CLD) and its transfer to different organisms of the soil food web. Seven species of invertebrates representing different taxonomic groups and trophic levels of the soil communities of Martinique were targeted and collected in six experimental banana fields, with a level of contamination within a range of values classically observed. Soil samples and macrofauna from the study sites were analysed for CLD and chlordecol (CLDOH) its main transformation product. The contamination of the soil fauna were related to δ15N (trophic level), proportion of soil ingestion (diet) and types of epidermis (mucus or exoskeleton) in order to study the different mechanisms of macrofauna contamination. Presence of CLD and CLDOH could be quantified in all the soil organisms from contaminated fields. Results showed a significant relationship between the CLD contamination of detritivorous and the ash content of their faeces, suggesting that soil ingestion was the main contamination pathway. In contrast, the exoskeleton-bearing diplopod Trigoniulus coralinus and the soft-bodied earthworm Eudrilus eugeniae, both detritivores with a comparable diet, had similar contamination levels, suggesting that the type of tegument has little influence on bioaccumulation. At the scale of the entire trophic network, a significant relationship was uncovered between δ15N values and CLD contamination of the fauna, therefore providing some in situ evidence for a bioamplification process along the soil food chain.
اظهر المزيد [+] اقل [-]Distribution of trace element pollutants in a contaminated grassland ecosystem established on metalliferous fluorspar tailings. 2: Zinc
1989
Andrews, S.M. | Johnson, M.S. | Cooke, J.A. (Dep. Biol., Sunderland Polytechnic, Sunderland SR2 3SD (UK))
Scots pine responses to CO2 enrichment - I. Ectomycorrhizal fungi and soil fauna
1996
Markkola, A.M. | Ohtonen, A. | Ahonen-Jonnarth, U. | Ohtonen, R. (Department of Biology, University of Oulu, P.O. Box 333, FIN-90571, Oulu (Finland))
Horizontal distribution of copper, nickel and enchytraeid worms in polluted soil
1999
Salminen, J. | Haimi, J. (Department of Ecological and Environmental Sciences, University of Helsinki, Niemenkatu 73, FIN-15210 Lahti (Finland))
Fate of organochlorine pesticides in soils and terrestrial biota of Los Padres pond watershed, Argentina
1999
Miglioranza, K.S.B. | Aizpun de Moreno, J.E. | Moreno, V.J. | Osterrieth, M.L. | Escalante, A.H. (Laboratorio de Ecotoxicologia, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Funes 3350, 7600 Mar del Plata (Argentina))
[Studies on effect and optimization of liming measures on vitality, nutrient supply and soil quality of Norway spruce and European beech stands in two sites of the Hochsauerland]
1989
Oldiges, H. (Fraunhofer-Institut fuer Umweltchemie und Oekotoxikologie, Schmallenberg-Grafschaft (Germany, F.R.))
[The influence of fertilization measures in forests upon some species of the soil fauna of forest ecosystems]
1986
Kreimes, K. | Thielemann, U.
[Short- und long-term effects of time application and mineral fertilization on the soil fauna of Norway spruce stands]
1989
Funke, W. (Ulm Univ. (Germany, F.R.). Abt. Oekologie und Morphologie der Tiere) | Jans, W.
[The influence of calcium fertilization, mineral fertilization and artificial rain on the soil fauna in Norway spruce forests]
1986
Funke, W. (Ulm Univ. (Germany, F.R.)) | Jans, W.
