National Fish Habitat Action Plan (NFHAP) 2010 HCI Scores and Human Disturbance Data (linked to NHDPLUSV1) for Iowa

This shapefile contains landscape factors representing human disturbances summarized to local and network catchments of river reaches for the state of Iowa. This dataset is the result of clipping the feature class 'NFHAP 2010 HCI Scores and Human Disturbance Data for the Conterminous United States linked to NHDPLUSV1.gdb' to the state boundary of Iowa. Landscape factors include land uses, population density, roads, dams, mines, and point-source pollution sites. The source datasets that were compiled and attributed to catchments were identified as being: (1) meaningful for assessing fish habitat; (2) consistent across the entire study area in the way that they were assembled; (3) representative of conditions in the past 10 years, and (4) of sufficient spatial resolution that they could be used to make valid comparisons among local catchment units. In this data set, these variables are linked to the catchments of the National Hydrography Dataset Plus Version 1 (NHDPlusV1) using the COMID identifier. They can also be linked to the reaches of the NHDPlusV1 using the COMID identifier. Catchment attributes are available for both local catchments (defined as the land area draining directly to a reach; attributes begin with "L_" prefix) and network catchments (defined by all upstream contributing catchments to the reach's outlet, including the reach's own local catchment; attributes begin with "N_" prefix). This shapefile also includes habitat condition scores created based on responsiveness of biological metrics to anthropogenic landscape disturbances throughout ecoregions. Separate scores were created by considering disturbances within local catchments, network catchments, and a cumulative score that accounted for the most limiting disturbance operating on a given biological metric in either local or network catchments. This assessment only scored reaches representing streams and rivers (see the process section for more details). Please use the following citation: Esselman, P., D.M. Infante, L. Wang, W. Taylor, W. Daniel, R. Tingley, J. Fenner, A. Cooper, D. Wieferich, D. Thornbrugh and J. Ross. (April 2011) National Fish Habitat Action Plan (NFHAP) 2010 HCI Scores and Human Disturbance Data (linked to NHDPLUSV1) for Iowa. National Fish Habitat Partnership Data System. http://dx.doi.org/doi:10.5066/F7CR5RCJ本形状文件（shapefile）包含针对艾奥瓦州河段的本地集水区与网络集水区汇总得到的、表征人类干扰的景观因子。本数据集是将要素类“关联NHDPLUSV1.gdb的美国本土全国鱼类栖息地行动计划（National Fish Habitat Action Plan, NFHAP）2010年HCI评分与人类干扰数据”裁剪至艾奥瓦州州界后得到的成果。景观因子涵盖土地利用、人口密度、道路、水坝、矿山以及点源污染场地。经汇总并赋值至集水区的源数据集满足以下判定标准：(1) 可有效用于评估鱼类栖息地；(2) 在整个研究区内的组装方式保持一致；(3) 能够反映过去十年的环境状况；(4) 具备足够的空间分辨率，可在本地集水区单元间开展可靠对比。本数据集中，这些变量通过COMID标识符与全国水文数据集增强版第1版（National Hydrography Dataset Plus Version 1, NHDPlusV1）的集水区建立关联，同时也可通过COMID标识符与NHDPlusV1的河段建立关联。集水区属性分为两类：本地集水区（指直接向河段汇水的陆地区域，属性以"L_"为前缀）与网络集水区（指所有汇入该河段出水口的上游集水区，包含河段自身的本地集水区，属性以"N_"为前缀），两类属性均已提供。本形状文件还包含基于生物指标对全生态区人为景观干扰的响应性所构建的栖息地状况评分。研究分别针对本地集水区、网络集水区内的干扰构建了专属评分，同时还构建了综合评分：该评分综合了对某一特定生物指标起主要限制作用的、来自本地或网络集水区的干扰因子。本次评估仅对溪流与河流类河段进行评分（详细流程参见方法章节）。引用格式如下：Esselman, P.、D.M. Infante、L. Wang、W. Taylor、W. Daniel、R. Tingley、J. Fenner、A. Cooper、D. Wieferich、D. Thornbrugh 及 J. Ross.（2011年4月）艾奥瓦州关联NHDPLUSV1的全国鱼类栖息地行动计划（National Fish Habitat Action Plan, NFHAP）2010年HCI评分与人类干扰数据. 全国鱼类栖息地合作伙伴数据系统. http://dx.doi.org/doi:10.5066/F7CR5RCJ