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The forests of Maryland play an important role in reducing air pollution in the state. Trees remove pollutants from the air by absorption through leaf stomata and interception by leaves. The forest soil is also a large and important sink for air pollutants. This ecosystem service is especially important due to its effect on human health. The pollutants removed from the air by trees can have many negative effects on human health, causing or exacerbating bronchitis, cardiovascular stress, and asthma. This effect is greater in urban areas, due to the combination of there being more people to benefit and higher concentrations of air pollution in urban areas. This ecosystem service totals $593,939 for the state yearly. \n\nThis data layer was created as part of the Maryland Department of Natural Resources \"Accounting for Maryland's Ecosystem Services\" program. 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The forests of Maryland play an important role in reducing air pollution in the state. Trees remove pollutants from the air by absorption through leaf stomata and interception by leaves. The forest soil is also a large and important sink for air pollutants. This ecosystem service is especially important due to its effect on human health. The pollutants removed from the air by trees can have many negative effects on human health, causing or exacerbating bronchitis, cardiovascular stress, and asthma. This effect is greater in urban areas, due to the combination of there being more people to benefit and higher concentrations of air pollution in urban areas. This ecosystem service totals over $1.2 million for the state yearly. \n\nThis data layer was created as part of the Maryland Department of Natural Resources \"Accounting for Maryland's Ecosystem Services\" program. 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The forests of Maryland play an important role in reducing air pollution in the state. Trees remove pollutants from the air by absorption through leaf stomata and interception by leaves. The forest soil is also a large and important sink for air pollutants. This ecosystem service is especially important due to its effect on human health. The pollutants removed from the air by trees can have many negative effects on human health, causing or exacerbating bronchitis, cardiovascular stress, and asthma. This effect is greater in urban areas, due to the combination of there being more people to benefit and higher concentrations of air pollution in urban areas. This ecosystem service totals over $42.8 million for the state yearly. \n\nThis data layer was created as part of the Maryland Department of Natural Resources \"Accounting for Maryland's Ecosystem Services\" program. 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The forests of Maryland play an important role in reducing air pollution in the state. Trees remove pollutants from the air by absorption through leaf stomata and interception by leaves. The forest soil is also a large and important sink for air pollutants. This ecosystem service is especially important due to its effect on human health. The pollutants removed from the air by trees can have many negative effects on human health, causing or exacerbating bronchitis, cardiovascular stress, and asthma. This effect is greater in urban areas, due to a higher concentrations of air pollution in urban areas.\n\nThis data layer was created as part of the Maryland Department of Natural Resources \"Accounting for Maryland's Ecosystem Services\" program. 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The forests of Maryland play an important role in reducing air pollution in the state. Trees remove pollutants from the air by absorption through leaf stomata and interception by leaves. The forest soil is also a large and important sink for air pollutants. This ecosystem service is especially important due to its effect on human health. The pollutants removed from the air by trees can have many negative effects on human health, causing or exacerbating bronchitis, cardiovascular stress, and asthma. This effect is greater in urban areas, due to the combination of there being more people to benefit and higher concentrations of air pollution in urban areas. This ecosystem service totals over $83.9 million for the state yearly. \n\nThis data layer was created as part of the Maryland Department of Natural Resources \"Accounting for Maryland's Ecosystem Services\" program. 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The forests of Maryland play an important role in reducing air pollution in the state. Trees remove pollutants from the air by absorption through leaf stomata and interception by leaves. The forest soil is also a large and important sink for air pollutants. This ecosystem service is especially important due to its effect on human health. The pollutants removed from the air by trees can have many negative effects on human health, causing or exacerbating bronchitis, cardiovascular stress, and asthma. This effect is greater in urban areas, due to a higher concentrations of air pollution in urban areas.\n\nThis data layer was created as part of the Maryland Department of Natural Resources \"Accounting for Maryland's Ecosystem Services\" program. 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The forests of Maryland play an important role in reducing air pollution in the state. Trees remove pollutants from the air by absorption through leaf stomata and interception by leaves. The forest soil is also a large and important sink for air pollutants. This ecosystem service is especially important due to its effect on human health. The pollutants removed from the air by trees can have many negative effects on human health, causing or exacerbating bronchitis, cardiovascular stress, and asthma. This effect is greater in urban areas, due to the combination of there being more people to benefit and higher concentrations of air pollution in urban areas. This ecosystem service totals $120,014 for the state yearly. \n\nThis data layer was created as part of the Maryland Department of Natural Resources \"Accounting for Maryland's Ecosystem Services\" program. 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The forests of Maryland play an important role in reducing air pollution in the state. Trees remove pollutants from the air by absorption through leaf stomata and interception by leaves. The forest soil is also a large and important sink for air pollutants. This ecosystem service is especially important due to its effect on human health. The pollutants removed from the air by trees can have many negative effects on human health, causing or exacerbating bronchitis, cardiovascular stress, and asthma. This effect is greater in urban areas, due to a higher concentrations of air pollution in urban areas.\n\nThis data layer was created as part of the Maryland Department of Natural Resources \"Accounting for Maryland's Ecosystem Services\" program. ", "geometryType": null, "copyrightText": "", "parentLayer": null, "subLayers": [], "minScale": 0, "maxScale": 0, "defaultVisibility": false, "extent": { "xmin": -8852491.802353041, "ymin": 4555540.588477639, "xmax": -8348491.802353041, "ymax": 4840360.588477639, "spatialReference": { "wkid": 102100, "latestWkid": 3857 } }, "hasAttachments": false, "htmlPopupType": "esriServerHTMLPopupTypeNone", "displayField": "", "typeIdField": null, "subtypeFieldName": null, "subtypeField": null, "defaultSubtypeCode": null, "fields": null, "geometryField": {}, "indexes": [], "subtypes": [], "relationships": [], "canModifyLayer": false, "canScaleSymbols": false, "hasLabels": false, "capabilities": "Map,Query", "supportsStatistics": false, "supportsAdvancedQueries": false, "supportedQueryFormats": "JSON, geoJSON", "isDataVersioned": false, "ownershipBasedAccessControlForFeatures": {"allowOthersToQuery": true}, "useStandardizedQueries": true, "advancedQueryCapabilities": { "useStandardizedQueries": true, "supportsStatistics": false, "supportsHavingClause": false, "supportsCountDistinct": false, "supportsOrderBy": false, "supportsDistinct": false, "supportsPagination": false, "supportsTrueCurve": false, "supportsReturningQueryExtent": true, "supportsQueryWithDistance": true, "supportsSqlExpression": false }, "supportsCoordinatesQuantization": true }, { "currentVersion": 10.71, "id": 11, "name": "Atmospheric Sulfur Dioxide Removal Economic Benefit - dollars per yr", "type": "Raster Layer", "description": "This layer quantifies the yearly economic value of removal of sulfur dioxide (SO2) by trees. The forests of Maryland play an important role in reducing air pollution in the state. Trees remove pollutants from the air by absorption through leaf stomata and interception by leaves. The forest soil is also a large and important sink for air pollutants. This ecosystem service is especially important due to its effect on human health. The pollutants removed from the air by trees can have many negative effects on human health, causing or exacerbating bronchitis, cardiovascular stress, and asthma. This effect is greater in urban areas, due to the combination of there being more people to benefit and higher concentrations of air pollution in urban areas. This ecosystem service totals over $20.4 million for the state yearly. \n\nThis data layer was created as part of the Maryland Department of Natural Resources \"Accounting for Maryland's Ecosystem Services\" program. ", "geometryType": null, "copyrightText": "", "parentLayer": null, "subLayers": [], "minScale": 0, "maxScale": 0, "defaultVisibility": false, "extent": { "xmin": -8852491.802353041, "ymin": 4555540.588477639, "xmax": -8348491.802353041, "ymax": 4840360.588477639, "spatialReference": { "wkid": 102100, "latestWkid": 3857 } }, "hasAttachments": false, "htmlPopupType": "esriServerHTMLPopupTypeNone", "displayField": "", "typeIdField": null, "subtypeFieldName": null, "subtypeField": null, "defaultSubtypeCode": null, "fields": null, "geometryField": {}, "indexes": [], "subtypes": [], "relationships": [], "canModifyLayer": false, "canScaleSymbols": false, "hasLabels": false, "capabilities": "Map,Query", "supportsStatistics": false, "supportsAdvancedQueries": false, "supportedQueryFormats": "JSON, geoJSON", "isDataVersioned": false, "ownershipBasedAccessControlForFeatures": {"allowOthersToQuery": true}, "useStandardizedQueries": true, "advancedQueryCapabilities": { "useStandardizedQueries": true, "supportsStatistics": false, "supportsHavingClause": false, "supportsCountDistinct": false, "supportsOrderBy": false, "supportsDistinct": false, "supportsPagination": false, "supportsTrueCurve": false, "supportsReturningQueryExtent": true, "supportsQueryWithDistance": true, "supportsSqlExpression": false }, "supportsCoordinatesQuantization": true }, { "currentVersion": 10.71, "id": 12, "name": "Net Carbon Sequestration - mT per yr", "type": "Raster Layer", "description": "This layer quantifies the yearly net carbon sequestration in Maryland's forests and wetlands.Carbon dioxide (CO2) is a naturally occurring greenhouse gas (GHG) found in the Earth\u2019s atmosphere which plays a critical role in maintaining a climate suitable for life on this planet. Though beneficial to life, rising atmospheric concentrations of CO2 over the past century have been linked to increases in climate variability and change at local, regional, and global scales. Over the past 30 years, climate researchers have worked to quantify the flux of carbon between sources and sinks in the carbon cycle. Forested areas have been identified as one of the major carbon sinks existing on Earth. During the process of photosynthesis, trees remove CO2 from the atmosphere, releasing oxygen (O2) and converting carbon (C) to long term storage within the woody biomass of their trunks. Thus, the world\u2019s forests hold an immense amount of carbon in standing trees, and have the potential to continue sequestering carbon as they grow. Wetlands also have a large capacity for sequestering carbon, particularly coastal wetlands which have high primary production and produce less methane (a gas which contributes to warming), than freshwater wetlands. Net sequestration values in this layer reflect both carbon sequestration and methane emissions. \n\nThis data layer was created as part of the Maryland Department of Natural Resources \"Accounting for Maryland's Ecosystem Services\" program. 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Econoic values were calculated using the Social Cost of Carbon calculation (an estimate of the costs of climate change), the federal standard established by the US EPA, to value carbon sequestration in Maryland. We use $143 per mt of carbon, the mid-point of the Social Cost of Carbon, in this work. This ecosystem service totals $233.7 million for Maryland yearly.\n\nThis data layer was created as part of the Maryland Department of Natural Resources \"Accounting for Maryland's Ecosystem Services\" program. 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Groundwater recharge represents the portion of precipitation that percolates through the soil and enters underground aquifers. Approximately 50% of Maryland residents rely on groundwater as a drinking water source, particularly in Southern Maryland and on the Eastern Shore. While water scarcity is not currently as critical of an issue in Maryland as it is in other parts of the United States, groundwater recharge is a vital component of securing the water supply of the state for the future, particularly in the face of a growing population. Besides drinking water groundwater is important for maintaining flow of rivers and streams important for recreation and wildlife habitat. The underlying geology across the landscape is the primary driver of the rate that water enters unconfined and confined aquifers. The amount of impervious surface and soil condition also affect the amount of water reaching aquifers. \n\nThis data layer was created as part of the Maryland Department of Natural Resources \"Accounting for Maryland's Ecosystem Services\" program. 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Economic values are based on several factors, including the average municipal price of water in Maryland , value of water for recreation, and the cost of investment in watershed protection. These values average $0.35 per m3 water. This service totals $1.26 billion for Maryland yearly.\n\nThis data layer was created as part of the Maryland Department of Natural Resources \"Accounting for Maryland's Ecosystem Services\" program. 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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.\n\nThis data layer was created as part of the Maryland Department of Natural Resources \"Accounting for Maryland's Ecosystem Services\" program. ", "geometryType": null, "copyrightText": "", "parentLayer": null, "subLayers": [], "minScale": 0, "maxScale": 0, "defaultVisibility": false, "extent": { "xmin": -8852491.802353041, "ymin": 4555540.588477639, "xmax": -8348491.802353041, "ymax": 4840360.588477639, "spatialReference": { "wkid": 102100, "latestWkid": 3857 } }, "hasAttachments": false, "htmlPopupType": "esriServerHTMLPopupTypeNone", "displayField": "", "typeIdField": null, "subtypeFieldName": null, "subtypeField": null, "defaultSubtypeCode": null, "fields": null, "geometryField": {}, "indexes": [], "subtypes": [], "relationships": [], "canModifyLayer": false, "canScaleSymbols": false, "hasLabels": false, "capabilities": "Map,Query", "supportsStatistics": false, "supportsAdvancedQueries": false, "supportedQueryFormats": "JSON, geoJSON", "isDataVersioned": false, "ownershipBasedAccessControlForFeatures": {"allowOthersToQuery": true}, "useStandardizedQueries": true, "advancedQueryCapabilities": { "useStandardizedQueries": true, "supportsStatistics": false, "supportsHavingClause": false, "supportsCountDistinct": false, "supportsOrderBy": false, "supportsDistinct": false, "supportsPagination": false, "supportsTrueCurve": false, "supportsReturningQueryExtent": true, "supportsQueryWithDistance": true, "supportsSqlExpression": false }, "supportsCoordinatesQuantization": true }, { "currentVersion": 10.71, "id": 17, "name": "Nitrogen Removal Economic Value - dollars per yr", "type": "Raster Layer", "description": "This layer quantifies the yearly economic value of nitrogen removal in Maryland's forest and wetland areas. Economic values are based on a number of factors, including the average cost to remove nutrients using best management practices, amount of funds provided for the BMP cost share program through the state and the Bay Restoration Fund , and the price on nutrient trading markets. The averaege value is $8.36 per lb nitrogen. Urban and agricultural lands are particularly important nutrient sources, and forests and wetlands in watersheds with high incidence of these land-uses tend to have high values of the nitrogen removal service. This service totals $402.6 million for Maryland yearly. \n\nThis data layer was created as part of the Maryland Department of Natural Resources \"Accounting for Maryland's Ecosystem Services\" program. 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Index values range from 1 (low) to 5 (high), based on a modified version of the Watershed Resource Registry Stormwater Preservation model which ranks relative capacity and stormwater load across the landscape. Several factors determine the amount of stormwater runoff that is stored on the landscape. Riparian areas and forests and wetlands in watersheds with high impervious area upstream receive larger amounts of stormwater runoff. The type of soil, presence of floodplain, whether in a riparian area, type of wetland, and the impervious surface percentage of the surrounding watershed all factor into how much water runs off into the area and the ability of the area to absorb that water. \n\nThis data layer was created as part of the Maryland Department of Natural Resources \"Accounting for Maryland's Ecosystem Services\" program. 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A number of factors were used to calculate economic values, including cost savings from flood insurance benefits, average stormwater remation fees, and cost of installing alternatives for flood prevention and stormwater mitigation (buffers, bio-swales, detention ponds,etc). This is the most valuable service considered, totaling $3.1 billion in Maryland yearly.\n\nThis data layer was created as part of the Maryland Department of Natural Resources \"Accounting for Maryland's Ecosystem Services\" program. 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Index values range from 1 (low) to 5 (high), based on a number of factors, including the size of habitat, degree of connection to other habitats (scored through the MD Green Infrastructure model) , and presence of rare species or habitats (scored through the MD BioNet model). Land in the top two ranks of MD BioNet was assigned the 1st and 2nd quintile of value, respectively. Land in the Green Infrastructure was assigned into quintiles based upon their score, and assigned corresponding values. Forests and wetlands occurring outside both models were given the lowest quintile value.\n\nThis data layer was created as part of the Maryland Department of Natural Resources \"Accounting for Maryland's Ecosystem Services\" program. 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Economic values were calculated based on several factors, including the cost to perservce natural lands paid by Ducks Unlimited, Conservation Fund, and for habitat banking. This service totals $2.6 billion for Maryland yearly, the second highest total found for ecosystem services considered in this study. \n\nThis data layer was created as part of the Maryland Department of Natural Resources \"Accounting for Maryland's Ecosystem Services\" program. 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About half of the water supply in Maryland is sourced from reservoirs. Natural lands are exceptionally important in maintaining water quality in reservoirs, reducing the cost to treat the water to water supply standards. This analysis is focused on the five major reservoirs in Maryland, Loch Raven, Liberty, Pretty Boy, Tridelphia, and Rocky Gorge are the major water sources for residents of the densely populated Baltimore-Washington corridor. The forests and wetlands within the watersheds of these reservoirs are of unique economic value, as help to provide clean water, reducing the cost of treatment, and avoiding the cost of expensive water treatment plant upgrades to maintain quality standards. Economic values are based on a number of factors, including the average cost savings of water treatment from having trees in the watershed, the municipal price of water, and the cost avoided of having to upgrade a treatment plant to advanced treatment. The average price was found to be $1.52 per m3 of water. Almost all of this service is concentrated in four counties- Baltimore, Carrol, Howard, and Montgomery, totaling $245 of the $246 million of value yearly.\n\nThis data layer was created as part of the Maryland Department of Natural Resources \"Accounting for Maryland's Ecosystem Services\" program. 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This value is a summation of the economic value of all ecosystem services analyzed through the Maryland Department of Natural Resources \"Accounting for Maryland Ecosystem Services\" program. Services included are atmospheric pollution removal (carbon monoxide, nitrogen dioxide, ozone, particulate matter 10, particulate matter 2.5, and sulfur dioxide), carbon sequestration, groundwater recharge, nitrogen removal, flood prevention and stormwater mitigation, wildlife habitat and biodiverisy, and surface water protection. \n\nThe total economic value of eocsystem services provided by forest and wetland areas across Maryland is over $8.02 billion yearly. \n\nThis data layer was created as part of the Maryland Department of Natural Resources \"Accounting for Maryland's Ecosystem Services\" program. 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