Foliage projective cover of 40 vegetation sites of central Chukotka from 2018

Field investigations were performed in four areas: a treeless mountainous tundra (16-KP-04; Lake Rauchuagytgyn area), tundra-taiga transition zone (16-KP-01, Lake Ilirney area) and a northern taiga (18-BIL-01, 18-BIL-02). In total, 40 sites were investigated. The sites were placed to cover different vegetation communities that characterise central Chukotka. Fifteen-metre radius sampling plots (sites) were demarcated in the most homogeneous locations. Heterogeneity was accommodated by roughly assorting vegetation into two to three vegetation types per sampling plot. Within each area of roughly estimated vegetation types we selected three representative 2 x 2 m subplots for representative ground-layer foliage projective cover assessment. Projective cover of tall shrubs and trees was estimated on 15-m radius circular plots directly. […]

在四个区域进行了实地调查：一无树木的山地苔原（16-KP-04；劳丘亚吉特湖地区）、苔原-针叶林过渡带（16-KP-01，伊利尔尼湖地区）以及北部针叶林（18-BIL-01，18-BIL-02）。总计调查了40个地点。这些地点的选取旨在涵盖构成楚科奇中部地区特色的各类植被群落。在最为均质的位置划定了半径十五米的采样区（地点）。通过将植被大致分类为每个采样区内约两种至三种植被类型，以适应异质性的需求。在估计植被类型的各个区域内，我们选取了三个具有代表性的2 x 2米亚样地，以评估其地表层植被的投影覆盖度。高灌木和树木的投影覆盖度直接在半径十五米的圆形采样区上进行估算。