Cary spongy moth visual defoliation data

The Forest Response to Stress and Damage (frequently referred to as FORSTAD) and long term forest monitoring project began in 1992 to study how mixed-oak forests respond to multiple forms of environmental change. The research took place at Cary Institute of Ecosystem Studies in the Hudson Valley of New York. FORSTAD included several sub-projects including (1) air pollution and nutrient cycling dynamics, (2) spongy moth dynamics, (3) small mammal dynamics and (4) vegetation dynamics. This dataset is a contribution to the Cary Institute of Ecosystem Studies, and is part of the Long term monitoring of forest ecosystems: Cary spongy moth dynamics.To understand the impacts of spongy moth, a non-native forest pest, every stage of the spongy moth life cycle was monitored. This included counts of spongy moths in each life stage as well as the effects of the caterpillar’s consumption of forest trees. The measurements included spongy moth egg mass density and fecundity, egg mass hatch and parasitism, late instar larval density, pupal density (at high density), canopy photos to estimate defoliation, visual estimate of defoliation, mechanisms of moth release, including white footed mouse and chipmunk removals in 1995, 1997 and 1998, larval &amp; pupal persistence, pupal predation, natural pupation and pupal viral analysis.The data included here are visual defoliation estimates made in summer 1991 from 4 FORSTAD sites: Red and Yellow Grids, Teahouse Hill Plots and North Canoe Hill Trees.<b>File list:</b>Spongy_Moth_Visual_Defoliation_Data_1991.csvSpongy_Moth_Visual_Defoliation_Metadata_public.pdf - contains complete project metadata, personnel, methodology, bibliography, and definitions for data variables.See Related Materials for more data from the spongy moth sub-project.

森林胁迫与损害响应（常简称为FORSTAD）及长期森林监测项目于1992年启动，旨在研究混交栎林对多种环境变化的响应机制。该研究在美国纽约州哈德逊谷的卡里生态系统研究所（Cary Institute of Ecosystem Studies）开展。FORSTAD包含四项子项目：(1) 空气污染与养分循环动态、(2) 舞毒蛾（spongy moth）种群动态、(3) 小型哺乳动物种群动态、(4) 植被动态。本数据集为卡里生态系统研究所的研究成果，隶属于“森林生态系统长期监测：卡里舞毒蛾种群动态”子项目。

为明确外来森林害虫舞毒蛾的生态影响，研究人员对其生命周期的全部阶段开展了监测工作，内容涵盖各生命阶段的舞毒蛾种群数量统计，以及幼虫取食林木所造成的危害。监测指标包括：舞毒蛾卵块密度与繁殖力、卵块孵化率与寄生率、晚龄幼虫密度、高密度种群下的蛹密度、用于估算落叶程度的冠层照片、落叶程度目视评估、舞毒蛾种群调控机制（含1995、1997及1998年对白足鼠与花栗鼠的移除操作）、幼虫与蛹的存续率、蛹捕食率、自然化蛹情况以及蛹病毒分析。

本次公开的数据为1991年夏季在4个FORSTAD监测点开展的落叶程度目视评估工作所得结果，监测点分别为：红网格与黄网格地块、茶室山样地以及北独木舟山林木样地。

<b>文件清单：</b>
Spongy_Moth_Visual_Defoliation_Data_1991.csv：1991年舞毒蛾目视落叶评估数据
Spongy_Moth_Visual_Defoliation_Metadata_public.pdf：包含完整的项目元数据、研究人员信息、研究方法、参考文献以及数据变量定义。
如需获取舞毒蛾子项目的更多数据，请参阅“相关材料”板块。