Lemming grazing data, Kilpisjärvi NW Finland, 1956-1970

Data package contains information of the Norwegian lemming (Lemmus lemmus) winter grazing in the Kilpisjärvi area, NW Finland, in 1956 to 1970. Data is mainly unpublished and collected by numerous people. Data was collected during years when the lemming desities we high i.e. in 1956, 1960-1961 and 1969-1970. Data is collected by measuring coverage percentages of mosses, lichens and graminoids in one squaremeter plots. Level of precision in taxa varies year to year (from species to genus level).

本数据集包含1956年至1970年间芬兰西北部基尔皮斯耶尔维（Kilpisjärvi）地区挪威旅鼠（Lemmus lemmus）冬季取食活动的相关数据。该数据大多未公开发表，由多名研究者共同收集。数据采集于旅鼠种群密度较高的年份，具体为1956年、1960-1961年以及1969-1970年。数据通过在1平方米样方内测定苔藓、地衣与禾草类植物的覆盖百分比获取。分类单元的鉴定精度逐年存在差异，精度范围可从物种水平至属水平不等。