At-Risk Species - RSGCN (Midwest Conservation Blueprint 2026 Indicator)

Definition This indicator identifies the prevalence and population trend of species at risk of being threatened with extinction, with an emphasis on at-risk species that are of a regional conservation need. It prioritizes areas based on the rarity-weighted richness of those Regional Species of Greatest Conservation Need (RSGCN) which are not listed as Threatened or Endangered by the ESA or G1 or G2 imperiled species. Pixels can take the following values: 1 – Lowest rarity-weighted richness values 2 – Low rarity-weighted richness values 3 – Slightly low rarity-weighted richness values 4 – Slightly high rarity-weighted richness values 5 – High rarity-weighted richness values 6 – Highest rarity-weighted richness values Selection This indicator was chosen as a targetable, important feature of the MLI goals that will be used to track conditions over time and prioritize areas for conservation. Indicators were defined through elicitation and prioritization exercises with federal and state participants. Criteria for the indicators includes 1) actionable, 2) measurable, 3) relevant to multiple groups across the region, and/or 4) representative of other social and/or environmental values. Input Data & Mapping Steps This indicator originates from the Midwest Regional Species of Greatest Conservation Need (RSGCN) database and the USGS Gap Analysis Project (GAP). To create this layer, MLI partners, members, and staff completed the following mapping steps: projected all input data to NAD83 (2011) UTM Zone 15N, calculated the range-weighted rarity of each RSGCN GAP model by dividing the raster value by the percent of blueprint extent covered by the species, mosaicked all input rasters into a single rarity-weighted richness layer, and reclassified the layer into the following values: 1 – Lowest rarity-weighted richness values, 2 – Low rarity-weighted richness values, 3 – Slightly low rarity-weighted richness values, 4 – Slightly high rarity-weighted richness values, 5 – High rarity-weighted richness values, and 6 – Highest rarity-weighted richness values. Finally, we removed highly altered areas using our Highly Altered Areas mask. For full mapping details, please refer to the Midwest Conservation Blueprint Development Process. For a complete download of all Blueprint input and output data, visit the Midwest Conservation Blueprint 2026 Data Download.指标定义：本指标用于识别濒临灭绝威胁的物种的种群分布率与种群变化趋势，重点关注具有区域保护需求的受威胁物种。本指标基于未被《濒危物种法案》（Endangered Species Act, ESA）列为受威胁或濒危物种，且未被纳入G1或G2濒危等级的区域优先保护物种（Regional Species of Greatest Conservation Need, RSGCN）的稀有度加权丰富度，对区域进行优先级排序。该指标的像素值可分为以下几类： 1 – 最低稀有度加权丰富度值 2 – 低稀有度加权丰富度值 3 – 略低稀有度加权丰富度值 4 – 略高稀有度加权丰富度值 5 – 高稀有度加权丰富度值 6 – 最高稀有度加权丰富度值 指标遴选依据：本指标被选为MLI目标中具备可针对性的重要特征，将用于随时间追踪环境状况并为保护工作划定优先级区域。该指标通过与联邦及州级参与方开展征询与优先级排序工作得以确立。指标遴选标准包括：1）可落地实施；2）可量化评估；3）与区域内多群体相关；及/或4）可代表其他社会及/或环境价值。 输入数据与制图步骤：本指标源自中西部区域优先保护物种（RSGCN）数据库及美国地质调查局（United States Geological Survey, USGS）间隙分析项目（Gap Analysis Project, GAP）。为生成该图层，MLI的合作方、成员及工作人员完成了如下制图流程：将所有输入数据投影至NAD83（2011）UTM 15N分区坐标系；通过将栅格值除以该物种覆盖的蓝图范围占比，计算每个RSGCN GAP模型的范围加权稀有度；将所有输入栅格拼接为单一的稀有度加权丰富度图层，并将该图层重分类为以下数值：1 – 最低稀有度加权丰富度值，2 – 低稀有度加权丰富度值，3 – 略低稀有度加权丰富度值，4 – 略高稀有度加权丰富度值，5 – 高稀有度加权丰富度值，6 – 最高稀有度加权丰富度值。最终，我们通过高度受干扰区域掩膜去除了人为活动高度改变的区域。如需完整制图细节，请参阅《中西部保护蓝图开发流程》。如需下载所有蓝图输入与输出数据，请访问《2026年中西部保护蓝图数据下载》页面。