Vegetation Burning in Pampa Biome Altered the Chemical Composition of Rainfall

ABSTRACT Rainfall is one of the primary nutrient inputs to vegetation and its chemical composition is dependent on air quality as falling rain scavenges gaseous and particulate emissions from natural, industrial, and agricultural activities. The objective of this study was to evaluate whether the vegetation burn in a region of the Pampa biome influences the pH and chemical composition (anions) in incident rainfall. Nitrate, sulfate, and chloride concentrations, as well as the pH of the rainwater, were influenced by suspended particles in the atmosphere from biomass burning of native grassland and pasture renewal. The rainwater was acidified by, ash, and soot, which introduced large amounts of chloride and sulfate into the ecosystems caused by burning vegetation.

摘要 降雨是植被获取营养的主要途径之一，其化学成分受空气质量影响——降落的雨水会冲刷自然、工业与农业活动产生的气态及颗粒物排放物。本研究旨在探究潘帕斯生物群系（Pampa biome）某区域内的植被焚烧是否会对降雨的pH值及化学成分（阴离子）产生影响。天然草原与牧场更新过程中的生物质燃烧所产生的大气悬浮颗粒物，会对雨水的硝酸盐、硫酸盐、氯化物浓度以及pH值造成影响。植被焚烧产生的灰烬与烟尘会使雨水酸化，并向生态系统中引入大量氯化物与硫酸盐。