SWFL_RW_Top3_May1_June30_2025

The SWFL satellite model outputs a continuous range of model probabilities (Hatten and Paradzick, 2003). In this layer, a probability threshold was set at 40 percent. Thus, areas with model probabilities less than 40% were considered less suitable breeding habitat and were excluded from the map. Model probabilities greater than 40% were aggregated into three probability classes: 40 - 60% (class 3), 60.1 – 80% (class 4), 80.1 - 100% (class 5). Studies have shown that SWFL territories increase exponentially as class value increases. For a complete description of methods and interpretation of maps, see Hatten and Paradzick, 2003; Hatten, 2016. The layer title (SWFL_RW_Top3cl_May1_June30_2025) is interpreted as follows: SWFL = Southwestern Willow Flycatcher; RW = Rangewide application of satellite model (56 Landsat-9 scenes) ; Top3cl = top three probability classes displayed on map (locations with a value less than 40% are not shown on the map); May1_June30 = range of dates that an image mosaic was created from Landsat 9 imagery, with the least cloudy images selected; 2023 = year of image selection; Version 5 (v5) was used as the mask to mask out background noise (i.e., non-riparian features that could confuse the model). Hatten, J.R., and C.E. Paradzick. 2003. A multiscaled model of southwestern willow flycatcher breeding habitat. Journal of Wildlife Management, 67: 774-788. https://www.jstor.org/stable/3802685?seq=1 Hatten, J.R., 2016, A satellite model of Southwestern Willow Flycatcher (Empidonax traillii extimus) breeding habitat and a simulation of potential effects of tamarisk leaf beetles (Diorhabda spp.), Southwestern United States: U.S. Geological Survey Open-File Report 2016–1120, 88 p., https://pubs.er.usgs.gov/publication/ofr20161120西南柳霸鹟（Southwestern Willow Flycatcher，缩写SWFL）卫星模型输出连续区间的模型概率值（Hatten与Paradzick，2003）。本图层设定概率阈值为40%。因此，模型概率低于40%的区域被视为适宜性较低的繁殖栖息地，未纳入该地图中。模型概率高于40%的区域被划分为三个概率等级：40%~60%（等级3）、60.1%~80%（等级4）、80.1%~100%（等级5）。已有研究表明，SWFL的领地数量随等级提升呈指数级增长。如需了解方法与地图解读的完整细节，请参阅Hatten和Paradzick，2003；Hatten，2016。 图层标题（SWFL_RW_Top3cl_May1_June30_2025）的含义如下：SWFL即西南柳霸鹟（Southwestern Willow Flycatcher）；RW代表卫星模型的全域应用（共使用56景陆地卫星9号（Landsat-9）影像）；Top3cl指地图仅展示前三个概率等级（概率值低于40%的区域未在图中显示）；May1_June30表示该影像镶嵌集由陆地卫星9号影像制作而成，选取了云量最少的影像，时间范围为5月1日至6月30日；2023为影像选取年份；使用版本5（v5）作为掩膜以去除背景噪声——即可能干扰模型识别的非河岸带地物。 参考文献： 1. Hatten, J.R. 与 C.E. Paradzick. 2003. 西南柳霸鹟繁殖栖息地多尺度模型. 《野生动物管理杂志》, 67: 774-788. https://www.jstor.org/stable/3802685?seq=1 2. Hatten, J.R., 2016. 美国西南部西南柳霸鹟（Empidonax traillii extimus）繁殖栖息地卫星模型及柽柳叶甲（Diorhabda spp.）潜在影响模拟. 美国地质调查局公开报告2016–1120, 共88页. https://pubs.er.usgs.gov/publication/ofr20161120