Aspen Characteristics - Sierra State Parks [ds379]

The database represents point locations and associated stand assessment data collected within aspen stands on lands administrated by the Sierra District, California Department of Parks and Recreation, Placer, Eldorado, Sierra and Inyo Counties, California. This data was gathered during the summer of 2005. The stands were evaluated according to their priority with regard to stand loss. The dataset has 15 aspen stands, of which six have been assessed. Field surveys were conducted by trained USFS field staff. Surveys were not complete for the watersheds, and so this is not considered a comprehensive database of aspen in the region. Aspen stands were assessed and delineated using a protocol developed by the lead investigators. Associated with this point layer is a polygon layer (SIERRA_SP_POLY) containing aspen stands delineated in conjunction with the aspen assessment information. Data Compilation: The Aspen Delineation Project (ADP) is a collaborative effort of the U.S. Forest Services Pacific Southwest Region, the California Department of Fish and Games Resource Assessment Program, and the California Office of Bureau of Land Management. Principal Investigator for ADP is David Burton; visit: www.aspensite.org for more information regarding the ADP. The Department of Fish and Games, Resource Assessment Program compiled this information from the collaborating agencies and other researchers, and formatted the data into a common database for the purpose of facilitating access to data related to the conservation of Quaking Aspen in California. This information portal falls within the ADP goals to help agencies and land managers identify, map, treat, and monitor aspen habitats. This dataset is a portion of a master database compiled during a year long effort in 2005 to pull together current GIS layers and maps depicting Aspen communities in California.

本数据库记录了加利福尼亚州普拉瑟、埃尔多拉多、谢拉及因约县，由加州公园和娱乐部谢拉片区管理的林地中颤杨（Quaking Aspen）林分的点位坐标及配套林分评估数据。该数据采集于2005年夏季。研究人员根据林分消亡风险优先级对林分开展评估。本数据集共涵盖15处颤杨林分，其中6处已完成评估。野外调查由经过培训的美国林务局（U.S. Forest Service, USFS）野外工作人员完成。由于流域调查尚未全面完成，本数据库暂不能视为该区域颤杨林的完整普查数据集。颤杨林分的评估与区划采用首席研究员制定的规范开展。本点位图层配套有多边形图层（SIERRA_SP_POLY），该图层包含与颤杨林评估信息相关联的已区划林分范围。数据整合工作：颤杨林区划项目（Aspen Delineation Project, ADP）由美国林务局太平洋西南区域分局、加州鱼类与狩猎部资源评估项目，以及加州土地管理局办公室联合推进。本项目首席研究员为David Burton；如需了解ADP的更多详情，请访问官网www.aspensite.org。加州鱼类与狩猎部资源评估项目整合了各合作机构及其他研究者的相关数据，并将其格式化至统一数据库，以方便获取与加州颤杨保护相关的各类数据。本数据门户契合ADP的项目目标，即协助各机构与土地管理者完成颤杨栖息地的识别、成图、治理与监测工作。本数据集为2005年全年整合工作所形成的主数据库的一部分，该工作旨在汇总当前用于描绘加州颤杨群落的地理信息系统（Geographic Information System, GIS）图层与地图。