Carbon and nutrient data for rainfall fractions in the Peruvian Amazon

Aquatic carbon (dissolved inorganic carbon (DIC), dissolved organic carbon (DOC) and particulate organic carbon and the carbon isotopic composition of DIC) and nutrients (calcium, magnesium, potassium, sodium, total soluble phosphorus and silica) in rainfall fractions (rainwater, throughfall, stemflow and overland flow) were sampled in the Western Amazonian basin. The samples were collected towards the end of a wet season April - May 2012. Rainfall and throughfall samples were collected in plastic buckets. Stemflow samples were collected using stemflow collection systems. Overland samples were collected using a a plastic pipe cut lengthways directing flow into a plastic bucket. Established standard methods were used to analyse the DIC, DOC and nutrients. These methods are outlined in the lineage. The samples were taken to understand the nutrient and carbon delivery in rainwater as well as leaching from tree canopies, stems and from the soil surface. The data collection was carried out as part of the Natural Environment Research Council (NERC) funded Amazonica project (NE/F005482/1).

本研究于亚马孙西部流域开展采样工作，采样对象为降雨组分（含雨水、穿透雨、树干茎流与地表径流）中的水生碳组分与营养盐：其中水生碳组分包括溶解无机碳（dissolved inorganic carbon, DIC）、溶解有机碳（dissolved organic carbon, DOC）、颗粒有机碳，以及DIC的碳同位素组成；营养盐涵盖钙、镁、钾、钠、总可溶性磷与二氧化硅。样品采集于2012年湿季末期（4月至5月）完成。其中，雨水与穿透雨样品采用塑料桶采集；树干茎流样品借助专用树干茎流采集系统获取；地表径流样品则通过一根纵向切开的塑料管引导水流至塑料桶完成采集。本次研究采用已确立的标准方法对DIC、DOC及营养盐进行分析，相关方法详见溯源谱系。本次采样旨在明晰雨水携带的碳与营养盐输入过程，以及林木冠层、树干及土壤表面的碳、营养盐淋溶效应。本项数据采集工作作为自然环境研究委员会（Natural Environment Research Council, NERC）资助的Amazonica项目（项目编号NE/F005482/1）的一部分实施完成。