Maryland Ecosystem Services - Nitrogen Removal Potential Index

This layer provides an index of the Nitrogen Removal Potential of forests and wetlands across the state of Maryland. Index values range from 1 (low) to 3 (high), based on a modified version of the USGS SPARROW (Spatially Referenced Regression on Watershed Attributes) model. The SPARROW model simulates simulates the loading of nitrogen and phosphorus across the Chesapeake Bay watershed based on land-use, incoming nutrients from other watersheds, and atmospheric deposition. To create the index, loading rates were designated as having low, medium, and high nutrient uptake rates based on a range of uptake rates for forests and wetlands taken from the academic literature. This data layer was created as part of the Maryland Department of Natural Resources "Accounting for Maryland's Ecosystem Services" program. This is a MD iMAP hosted service. Find more information on https://imap.maryland.gov. Map Service Link: https://mdgeodata.md.gov/imap/rest/services/Environment/MD_EcosystemServices/MapServer/16 Download the Ecosystem Services layers at: https://downloads.mdgeodata.md.gov/Environment%20Downloads/Ecosystem%20Services/EcosystemServices.gdb.zip

本图层提供马里兰州全域森林与湿地的脱氮潜力指数。该指数取值范围为1（低）至3（高），其编制基于美国地质调查局（USGS）SPARROW（流域属性空间参考回归，Spatially Referenced Regression on Watershed Attributes）模型的改进版本。SPARROW模型基于土地利用、其他流域输入的营养物质以及大气沉降，模拟切萨皮克湾流域内氮与磷的负荷量。为构建该指数，研究人员依据学术文献中获取的森林与湿地营养吸收率区间，将负荷率划分为低、中、高三档营养吸收水平。本数据图层由马里兰州自然资源部“马里兰州生态系统服务核算”项目开发完成，属于MD iMAP托管服务。更多信息可访问https://imap.maryland.gov。地图服务链接：https://mdgeodata.md.gov/imap/rest/services/Environment/MD_EcosystemServices/MapServer/16；生态系统服务图层下载地址：https://downloads.mdgeodata.md.gov/Environment%20Downloads/Ecosystem%20Services/EcosystemServices.gdb.zip