Average Date When Lilacs Bloom in Idaho

This GIS digital data set portrays the average date when lilacs start bloom in Idaho. Information on dates when plants and animals reach various stages in their development is referred to as phenological data. The purple common lilac (Syringa vulgaris L.) was chosen as the indicator of plant development in western regional phenological studies because it is well adapted and widely distributed throughout the Western United States. Approximately 160 observers scattered throughout Idaho observed the dates of lilac bloom for the 10 years of data used as a base for this study (from 1957 to 1966). Without the unselfish dedication of these volunteers this study would not have been possible.

本地理信息系统（GIS）数字数据集呈现了美国爱达荷州境内紫丁香始花期的平均日期。记录动植物生长发育各阶段节点日期的信息被统称为物候数据。在西部区域物候研究中，普通紫色丁香（Syringa vulgaris L.）被选定为植物生长发育的指示物种，因其适应性优异且广泛分布于美国西部全域。本研究以1957年至1966年十年间的观测数据为基础，期间共有约160名遍布爱达荷州各地的观测者记录了紫丁香的开花日期。若无这些志愿者的无私奉献，本研究将无法完成。