Accumulation of Current-Use Pesticides in Neotropical Montane Forests
In Central America, chemical-intensive tropical agriculture takes place in close proximity to highly valued and biologically diverse ecosystems, yet the potential for atmospheric transport of pesticides from plantations to national parks and other reserves is poorly characterized. The specific meteo...
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Veröffentlicht in: | Environmental science & technology 2007-02, Vol.41 (4), p.1118-1123 |
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creator | Daly, Gillian L Lei, Ying D Teixeira, Camilla Muir, Derek C. G Castillo, Luisa E Wania, Frank |
description | In Central America, chemical-intensive tropical agriculture takes place in close proximity to highly valued and biologically diverse ecosystems, yet the potential for atmospheric transport of pesticides from plantations to national parks and other reserves is poorly characterized. The specific meteorological conditions of mountain ranges can lead to contaminant convergence at high altitudes, raising particular concern for montane forest ecosystems downwind from pesticide use areas. Here we show, based on a wide-ranging air and soil sampling campaign across Costa Rica, that soils in some neotropical montane forests indeed display much higher concentrations of currently used pesticides than soils elsewhere in the country. Specifically, elevated concentrations of the fungicide chlorothalonil, the herbicide dacthal, and the insecticide metabolite endosulfan sulfate on volcanoes Barva and Poas, lying directly downwind of the extensive banana plantations of the Caribbean lowland, indicate the occurrence of atmospheric transport and wet deposition of pesticides at high altitudes. Calculations with a contaminant fate model, designed for mountain regions and parametrized to the Costa Rican environment, show that chemicals with a log K AW between −3 and −5 have a greater potential for accumulation at high altitudes. This enrichment behavior is quantified by the Mountain Contamination Potential and is sensitive to contaminant degradability. The modeling work supports the hypothesis suggested by the field results that it is enhanced precipitation scavenging at high elevations (caused by lower temperatures and governed by K AW) that causes pesticides to accumulate in tropical montane areas. By providing for the first time evidence of significant transfer of currently used pesticides to Central American montane cloud forests, this study highlights the need to evaluate the risk that tropical agricultural practices place on the region's ecological reserves. |
doi_str_mv | 10.1021/es0622709 |
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G ; Castillo, Luisa E ; Wania, Frank</creator><creatorcontrib>Daly, Gillian L ; Lei, Ying D ; Teixeira, Camilla ; Muir, Derek C. G ; Castillo, Luisa E ; Wania, Frank</creatorcontrib><description>In Central America, chemical-intensive tropical agriculture takes place in close proximity to highly valued and biologically diverse ecosystems, yet the potential for atmospheric transport of pesticides from plantations to national parks and other reserves is poorly characterized. The specific meteorological conditions of mountain ranges can lead to contaminant convergence at high altitudes, raising particular concern for montane forest ecosystems downwind from pesticide use areas. Here we show, based on a wide-ranging air and soil sampling campaign across Costa Rica, that soils in some neotropical montane forests indeed display much higher concentrations of currently used pesticides than soils elsewhere in the country. Specifically, elevated concentrations of the fungicide chlorothalonil, the herbicide dacthal, and the insecticide metabolite endosulfan sulfate on volcanoes Barva and Poas, lying directly downwind of the extensive banana plantations of the Caribbean lowland, indicate the occurrence of atmospheric transport and wet deposition of pesticides at high altitudes. Calculations with a contaminant fate model, designed for mountain regions and parametrized to the Costa Rican environment, show that chemicals with a log K AW between −3 and −5 have a greater potential for accumulation at high altitudes. This enrichment behavior is quantified by the Mountain Contamination Potential and is sensitive to contaminant degradability. The modeling work supports the hypothesis suggested by the field results that it is enhanced precipitation scavenging at high elevations (caused by lower temperatures and governed by K AW) that causes pesticides to accumulate in tropical montane areas. 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G</creatorcontrib><creatorcontrib>Castillo, Luisa E</creatorcontrib><creatorcontrib>Wania, Frank</creatorcontrib><title>Accumulation of Current-Use Pesticides in Neotropical Montane Forests</title><title>Environmental science & technology</title><addtitle>Environ. Sci. Technol</addtitle><description>In Central America, chemical-intensive tropical agriculture takes place in close proximity to highly valued and biologically diverse ecosystems, yet the potential for atmospheric transport of pesticides from plantations to national parks and other reserves is poorly characterized. The specific meteorological conditions of mountain ranges can lead to contaminant convergence at high altitudes, raising particular concern for montane forest ecosystems downwind from pesticide use areas. Here we show, based on a wide-ranging air and soil sampling campaign across Costa Rica, that soils in some neotropical montane forests indeed display much higher concentrations of currently used pesticides than soils elsewhere in the country. Specifically, elevated concentrations of the fungicide chlorothalonil, the herbicide dacthal, and the insecticide metabolite endosulfan sulfate on volcanoes Barva and Poas, lying directly downwind of the extensive banana plantations of the Caribbean lowland, indicate the occurrence of atmospheric transport and wet deposition of pesticides at high altitudes. Calculations with a contaminant fate model, designed for mountain regions and parametrized to the Costa Rican environment, show that chemicals with a log K AW between −3 and −5 have a greater potential for accumulation at high altitudes. This enrichment behavior is quantified by the Mountain Contamination Potential and is sensitive to contaminant degradability. The modeling work supports the hypothesis suggested by the field results that it is enhanced precipitation scavenging at high elevations (caused by lower temperatures and governed by K AW) that causes pesticides to accumulate in tropical montane areas. By providing for the first time evidence of significant transfer of currently used pesticides to Central American montane cloud forests, this study highlights the need to evaluate the risk that tropical agricultural practices place on the region's ecological reserves.</description><subject>Agricultural management</subject><subject>Agricultural pollution</subject><subject>Agronomy. Soil science and plant productions</subject><subject>Air Movements</subject><subject>Air Pollutants - analysis</subject><subject>Air pollution</subject><subject>Altitude</subject><subject>Animal, plant and microbial ecology</subject><subject>Applied ecology</subject><subject>Applied sciences</subject><subject>Atmosphere</subject><subject>Biological and medical sciences</subject><subject>Chemical contaminants</subject><subject>Costa Rica</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Ecotoxicology, biological effects of pollution</subject><subject>Effects of pollution and side effects of pesticides on plants and fungi</subject><subject>Endosulfan - analysis</subject><subject>Engineering and environment geology. Geothermics</subject><subject>Environmental Monitoring</subject><subject>Environmental science</subject><subject>Exact sciences and technology</subject><subject>Forests</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Global environmental pollution</subject><subject>Mountains</subject><subject>Musa</subject><subject>Nitriles - analysis</subject><subject>Pesticides</subject><subject>Pesticides - analysis</subject><subject>Phthalic Acids - analysis</subject><subject>Poa</subject><subject>Pollution</subject><subject>Pollution, environment geology</subject><subject>Soil and water pollution</subject><subject>Soil contamination</subject><subject>Soil Pollutants - analysis</subject><subject>Soil science</subject><subject>Trees</subject><subject>Tropical Climate</subject><issn>0013-936X</issn><issn>1520-5851</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpl0EtL7DAUB_Agio6PhV_gUoQruKieNG0ey2F8wvgAFcRNyKSnEG-nmZu0oN_eyAwO6CqL_Djnf_6EHFI4pVDQM4zAi0KA2iAjWhWQV7Kim2QEQFmuGH_ZIbsxvgFAwUBukx0qKsUEyBG5GFs7zIfW9M53mW-yyRACdn3-HDF7wNg762qMmeuyO_R98AtnTZvd-q43HWaXPiQT98lWY9qIB6t3jzxfXjxNrvPp_dXNZDzNTclUnyMIJkVTsxKqWnCOtmEoUda1NTgzrGa15EpxU6Iys9KgkJxbWvJyxgsKjO2R4-XcRfD_h7RZz1202LYpix-iLiBdXgEkePQDvvkhdCmbThVQwbjiCZ0skQ0-xoCNXgQ3N-FDU9BfxervYpP9sxo4zOZYr-WqyQT-roCJqaEmmM66uHYpFyukSC5fOhd7fP_-N-Gf5oKJSj89POrpuXpV7FHoyXqusXF9xO-An1lHmbE</recordid><startdate>20070215</startdate><enddate>20070215</enddate><creator>Daly, Gillian L</creator><creator>Lei, Ying D</creator><creator>Teixeira, Camilla</creator><creator>Muir, Derek C. 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Psychology</topic><topic>Global environmental pollution</topic><topic>Mountains</topic><topic>Musa</topic><topic>Nitriles - analysis</topic><topic>Pesticides</topic><topic>Pesticides - analysis</topic><topic>Phthalic Acids - analysis</topic><topic>Poa</topic><topic>Pollution</topic><topic>Pollution, environment geology</topic><topic>Soil and water pollution</topic><topic>Soil contamination</topic><topic>Soil Pollutants - analysis</topic><topic>Soil science</topic><topic>Trees</topic><topic>Tropical Climate</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Daly, Gillian L</creatorcontrib><creatorcontrib>Lei, Ying D</creatorcontrib><creatorcontrib>Teixeira, Camilla</creatorcontrib><creatorcontrib>Muir, Derek C. 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The specific meteorological conditions of mountain ranges can lead to contaminant convergence at high altitudes, raising particular concern for montane forest ecosystems downwind from pesticide use areas. Here we show, based on a wide-ranging air and soil sampling campaign across Costa Rica, that soils in some neotropical montane forests indeed display much higher concentrations of currently used pesticides than soils elsewhere in the country. Specifically, elevated concentrations of the fungicide chlorothalonil, the herbicide dacthal, and the insecticide metabolite endosulfan sulfate on volcanoes Barva and Poas, lying directly downwind of the extensive banana plantations of the Caribbean lowland, indicate the occurrence of atmospheric transport and wet deposition of pesticides at high altitudes. Calculations with a contaminant fate model, designed for mountain regions and parametrized to the Costa Rican environment, show that chemicals with a log K AW between −3 and −5 have a greater potential for accumulation at high altitudes. This enrichment behavior is quantified by the Mountain Contamination Potential and is sensitive to contaminant degradability. The modeling work supports the hypothesis suggested by the field results that it is enhanced precipitation scavenging at high elevations (caused by lower temperatures and governed by K AW) that causes pesticides to accumulate in tropical montane areas. By providing for the first time evidence of significant transfer of currently used pesticides to Central American montane cloud forests, this study highlights the need to evaluate the risk that tropical agricultural practices place on the region's ecological reserves.</abstract><cop>Washington, DC</cop><pub>American Chemical Society</pub><pmid>17593708</pmid><doi>10.1021/es0622709</doi><tpages>6</tpages></addata></record> |
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subjects | Agricultural management Agricultural pollution Agronomy. Soil science and plant productions Air Movements Air Pollutants - analysis Air pollution Altitude Animal, plant and microbial ecology Applied ecology Applied sciences Atmosphere Biological and medical sciences Chemical contaminants Costa Rica Earth sciences Earth, ocean, space Ecotoxicology, biological effects of pollution Effects of pollution and side effects of pesticides on plants and fungi Endosulfan - analysis Engineering and environment geology. Geothermics Environmental Monitoring Environmental science Exact sciences and technology Forests Fundamental and applied biological sciences. Psychology Global environmental pollution Mountains Musa Nitriles - analysis Pesticides Pesticides - analysis Phthalic Acids - analysis Poa Pollution Pollution, environment geology Soil and water pollution Soil contamination Soil Pollutants - analysis Soil science Trees Tropical Climate |
title | Accumulation of Current-Use Pesticides in Neotropical Montane Forests |
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