Sierra Nevada Red Fox Species Habitat Model (Continuous) - CDFW [ds3327]

This species habitat model (SHM) is a continuous layer depicting a species’ predicted habitat associations within each cell, represented as a value between 0 and 1. Values closer to 1 depict a higher relative probability of habitat use within that cell. The focal taxon may or may not actually occur in areas predicted with a high relative probability of habitat use; habitat may be suitable but unoccupied, particularly for taxa with small and/or declining populations or limited mobility. Models may not accurately reflect all habitats used per taxon due to a dearth of presence data, thereby limiting the scope of environmental space represented by the SHM. Users should refer to the validation metrics and consider the level of uncertainty associated with the model when interpreting model outputs. Areas with high relative predicted use values may be prioritized for locating survey or monitoring sites for scientific studies aiming to conserve and protect focal taxa. Results of the Maxent model are included in the pdf attachment and are linked here: https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=245187 .本物种栖息地模型（Species Habitat Model，SHM）为连续图层，用以描述各单元格内物种的预测栖息地关联关系，其取值范围介于0至1之间。取值越接近1，代表该单元格内的栖息地利用相对概率越高。目标类群实际未必会出现在预测栖息地利用相对概率较高的区域；栖息地可能适宜但未被占据，对于种群规模较小、种群数量下降或活动能力有限的类群而言，这一情形尤为普遍。由于物种出现记录数据匮乏，该模型或无法准确反映目标类群所利用的全部栖息地类型，进而限制了本物种栖息地模型所涵盖的环境空间范围。用户在解读模型输出结果时，应参考相关验证指标，并考量模型所关联的不确定性水平。对于旨在保护目标类群的科学研究而言，可优先将预测栖息地利用相对值较高的区域作为调查或监测样点的选址范围。Maxent模型的结果已包含于PDF附件中，相关链接如下：https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=245187