Data from: Native forage mediates influence of irrigated agriculture on migratory behavior of elk

BarkerEtal-2019_JAE_modelDataData to support analysis of the relationship between external factors and the likelihood of an elk migrating, remaining resident, or exhibiting behaviors that were intermediate between migration and residency. Behav = type of migratory behavior (“other” denotes intermediate behavior). Dens = an index of conspecific density on the winter range (approximate number of animals in the herd divided by the area of the herd winter range). deltaFor = difference in the forage (measured as maximum NDVI) available outside vs. inside an individual’s winter range during summer. Herd = elk herd in which the individual spent the winter at the beginning of the year studied. YOI = year during which data were collected for the individual. densOwn = intensity of human use on the individual’s winter range (measured as density of land ownership, i.e., number of unique landowners on the individual’s winter range divided by the area of the individual’s winter range). irrig = binary covariate to represent whether (1) or not (0) the individual had access to irrigated agriculture on its winter range. predFor = how predictably forage varied across the landscape over the previous six years, including the year during which the individual was studied (measured as the negative six-year standard deviation of NDVI amplitude).

BarkerEtal-2019_JAE_modelData：本数据集用于开展外部因素与麋鹿（elk）迁徙、居留，或表现出介于迁徙与居留之间的中间行为的可能性之间的关系分析。
- Behav：迁徙行为类型，其中"other"表示中间过渡行为。
- Dens：冬季栖息地同种个体密度指数（近似为种群总个体数除以该种群冬季栖息地面积所得值）。
- deltaFor：夏季个体冬季栖息地内外可获取饲草的差值（以最大归一化植被指数（Normalized Difference Vegetation Index, NDVI）衡量）。
- Herd：研究初始年份个体越冬所在的麋鹿种群。
- YOI：为该个体采集数据的对应年份。
- densOwn：个体冬季栖息地的人类活动强度（以土地所有权密度衡量，即该栖息地内独特土地所有者总数除以栖息地面积所得值）。
- irrig：二元协变量，用于标识个体冬季栖息地是否可访问灌溉农业用地：取值1代表是，取值0代表否。
- predFor：涵盖研究当年在内的过去六年内，饲草在整个景观中的变化可预测程度（以NDVI振幅的六年负标准差衡量）。