Leaf damage data on European beech leaves from saplings and mature trees from Lower Saxony, Germany in 2019@en

Leaf damage data on European beech leaves from saplings and mature trees from Lower Saxony, Germany. Three forest stand types were studied (European beech/Douglas fir mixture, European beech monoculture, and European beech/Norway spruce mixture) at six different sites, three in southern (site 1-3) and three (4-6) in northern Lower Saxony, Germany. At each plot 20 leaves from 20 saplings and 80 leaves from 5 mature trees were sampled in August 2019. After sampling the dorsal side of leaves was scanned and the amount of damage was estimated with an image processing software called ImageJ. Damage is distinguished into total, pathogen and herbivory damage which is further distinguished into chewing, sucking, mining, skeletonizing and gall damage.本数据集涵盖德国下萨克森州欧洲山毛榉（European beech）的叶片损伤数据，样本取自当地幼龄树与成熟植株。研究共设置6处样地，其中下萨克森州南部（样地1-3）、北部（样地4-6）各3处，涉及3种林分类型：欧洲山毛榉/花旗松（Douglas fir）混交林、欧洲山毛榉纯林、欧洲山毛榉/挪威云杉（Norway spruce）混交林。2019年8月，于每个样地完成采样：采集20株幼龄树的20片叶片，以及5株成熟植株的80片叶片。采样结束后，对叶片背面进行扫描，并通过图像处理软件ImageJ（ImageJ）估算叶片损伤程度。叶片损伤可划分为三大类别：总损伤、病原损伤与植食性损伤；其中植食性损伤可进一步细分为咀嚼式损伤、刺吸式损伤、潜叶式损伤、镂刻式损伤与虫瘿损伤。