Data for: Madicolous insects from Atlantic forest and Amazon mountains (Brazil)

The dataset consist on abundance values of madicolous insects - aquatic organisms that inhabit thin layers of water - recorded in three mountains of the Atlantic Rainforest (G1, G2, and G3) and in one Amazon mountain (G4). The distribution of sampling sites cover the full elevational range of each region, from 0 to 2,800 m a.s.l. in the Atlantic Forest and from 90 to 3,000 meters a.s.l. in the Amazon. A total of 109 sampling sites were investigated, where physico-chemical parameters of water (temperature, pH, dissolved oxygen and conductivity), geographic coordinates and the altitude were also obtained.

Methods
Adults of madicolous insects were sampled with emergence traps (0.125 m2 coverage area), and immatures with hand net (250 µm mesh size) in the same sites were adults were collected. All individuals were identified to the lowest taxonomic resolution possible (genus, species or morphospecies). Water physico-chemical parameters were determined with an analytical kit and conductivity was measured with a portable conductometer. Geographic coordinates and the altitude of each sampling site were obtained in the field with GPS.

本数据集收录了大西洋雨林三座山地（G1、G2、G3）及亚马逊区域一座山地（G4）内的薄层积水生昆虫（madicolous insects）丰度数据，该类昆虫为栖息于薄层水体中的水生生物。采样点覆盖了各研究区域的完整海拔梯度：大西洋森林区域海拔范围为0至2800 m a.s.l.，亚马逊区域为90至3000 m a.s.l.。本研究共调查109个采样点，同时获取了各采样点的水体理化参数（水温、pH、溶解氧及电导率）、地理坐标与海拔高度。

采样与实验方法
薄层积水生昆虫成虫采用羽化诱捕器（emergence traps，覆盖面积0.125 m²）采样，幼虫则在成虫采样的同一地点使用孔径250 µm的手持网（hand net）采集。所有个体均被鉴定至尽可能低的分类阶元（属、种或形态种）。
水体理化参数采用分析试剂盒测定，电导率通过便携式电导仪（portable conductometer）测量。各采样点的地理坐标与海拔高度均通过野外GPS获取。