Coho Range [ds534]

June 2016 Version Data Content: This data set contains all CalWater 2.2.1 Planning Watersheds (PWS) where CDFW has documented coho salmon to be present during or after 1990. It was developed for the express purpose of assisting with Coho salmon recovery planning efforts. NOTE: Acreages are calculated for area inside California only. It is important to note that this data set does not attempt to model the entire possible distribution of the species. Rather, it only represents planning watersheds intersecting the known distribution, which is based on where the species has been observed and reported. While the distribution data may indeed represent the extent of the species, generally the upstream extent of the distribution only represents the location of positive sampling or other observations.. Therefore, this data set likely represents an underestimation of the absolute geographic distribution of the species. Data Source: This watershed level data set was derived by intersecting Calwater PWS with point and line features depicting Coho salmon distribution. These features are derived from a subset of data contained in thedeveloper's file geodatabase (©Environmental Science Research Institute (ESRI) 2016). This is an ongoing project developed by CDFW Northern Region Data Management and GIS with assistance from CDFW Biogeographic Data Division and Pacific States Marine Fisheries Commission. These data are based upon confirmed observations of Coho salmon. Effort has been made to identify and correct watersheds that were erroneously selected due to inaccuracies from using data of different scales. The observation data that are the basis for the distribution were compiled from a variety of disparate sources including but not limited to CDFW, U.S. Forest Service, National Marine Fisheries Service, timber companies, and the public. Forms of documentation include CDFG administrative reports, personal communications with biologists, observation reports, and literature reviews. This derived dataset is meant to be continually updated as additional information is acquired. As such, any copy of this dataset is considered to be a snapshot of the known Coho Distribution at the time of release. It is incumbent upon the user to ensure that they have the most recent version prior to making management or planning decisions. Data Usage: Examples of appropriate uses include: Coho salmon recovery planning Evaluation of future survey sites for Coho Validating Coho distribution models Examples of inappropriate uses include: Using this data to make parcel or ground level land use management decisions. Using this data set to prove or support non-existence of coho at any spatial scale. Assuming that Coho are prevalent throughout the entire watershed. All users of this data should seek the assistance of qualified professionals such as surveyors, hydrologists, or fishery biologists as needed to ensure that such users possess complete, precise, and up to date information on Coho salmon distribution and water body location. Please refer to "Use Constraints" section below.2016年6月版 数据内容：本数据集涵盖所有CalWater 2.2.1规划流域（Planning Watersheds, PWS），其中加州鱼类与野生动物部门（California Department of Fish and Wildlife, CDFW）记录到1990年及之后有银大麻哈鱼（Coho salmon）分布。本数据集专为协助银大麻哈鱼恢复规划工作而开发。 注：仅对加利福尼亚州境内区域计算面积。 需特别说明的是，本数据集并未尝试模拟该物种所有可能的分布范围，仅涵盖与已知分布范围相交的规划流域，而该已知分布基于物种的观测与报告记录。尽管本分布数据或许能体现该物种的分布范围，但通常而言，分布的上游边界仅代表阳性采样或其他观测点的位置。因此，本数据集大概率低估了该物种实际的地理分布范围。 数据来源：本流域级数据集通过将CalWater PWS与描绘银大麻哈鱼分布的点、线要素叠加相交得到。这些要素源自环境科学研究所（Environmental Science Research Institute, ESRI）2016年发布的开发者文件地理数据库（File Geodatabase）中的子集数据。本项目由CDFW北部区域数据管理与地理信息系统团队开发，目前仍在持续更新，并得到CDFW生物地理数据部门及太平洋州立海洋渔业委员会（Pacific States Marine Fisheries Commission）的协助。 本数据集基于已确认的银大麻哈鱼观测记录。项目团队已尽力识别并修正因使用不同尺度数据导致的错误选取流域。作为分布数据基础的观测数据，源自多种不同渠道，包括但不限于CDFW、美国林务局（U.S. Forest Service）、国家海洋渔业局（National Marine Fisheries Service）、木材公司及公众。记录形式包括CDFG行政报告、与生物学家的私人沟通记录、观测报告及文献综述。 本衍生数据集将随着新信息的获取持续更新。因此，本数据集的任何副本均仅代表发布时已知的银大麻哈鱼分布快照。使用者有责任在做出管理或规划决策前，确认自己使用的是数据集的最新版本。 数据用途：合规使用场景包括：银大麻哈鱼恢复规划、银大麻哈鱼未来调查点位评估、银大麻哈鱼分布模型验证。 不合规使用场景包括：利用本数据集进行地块或地面级土地利用管理决策、利用本数据集证明或支持任意空间尺度下银大麻哈鱼不存在、假设银大麻哈鱼在整个流域内均广泛分布。 所有数据使用者应在必要时寻求测量师、水文学家或渔业生物学家等合格专业人士的协助，以确保自身掌握关于银大麻哈鱼分布及水体位置的完整、精准且最新的信息。请参阅下文的"Use Constraints"章节。