Service Description: Unvegetated Marsh to Vegetated Marsh Ratio
Service ItemId: 92f2fb80e9b04a5e963ba7861471b0b2
Has Versioned Data: false
Max Record Count: 2000
Supported query Formats: JSON
Supports applyEdits with GlobalIds: False
Supports Shared Templates: True
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Description: Marshes that may be suffering from a loss of marsh elevation capital are vulnerable to stress and declining vegetative biomass. Other environmental factors such as eutrophication or inadequate levels of sedimentation may further exacerbate the effects of rising sea levels. One metric that has been widely adopted as a useful indicator of salt marsh decline is the loss of vegetation cover and biomass and replacement with bare soil/peat or open water. This metric often takes the form of a ratio of unvegetated to vegetated area or unvegetated to overall marsh area; this metric is positively correlated with degrading marsh condition. The data has been scaled from 0 to 100% and binned into 10 classes. For example, a value of 91-100% represents a location that is nearly entirely unvegetated. The mean UVVR value was calculated for each marsh unit by averaging all original 1 hectare grid cells within that marsh unit polygon.The original GIS layer for this metric was produced by the Saltmarsh Habitat and Avian Research Program (SHARP). The SHARP map layer was derived from the remote sensing of tidal wetlands using NAIP imagery (2015 & 2016) and NED elevation data. The SHARP GIS layer was modified for viewing here by the Rutgers University Center for Remote Sensing & Spatial Analysis. For more information, please consulthttps://www.tidalmarshbirds.org/?page_id=1871 Also:https://www.sciencebase.gov/catalog/item/57fe81fbe4b0824b2d148389https://www.nature.com/articles/ncomms14156https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019GL086703
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Spatial Reference: 102711 (3424)
Initial Extent:
XMin: -198819.764705879
YMin: 298672.16470589
XMax: 1040279.76470589
YMax: 894750.000000008
Spatial Reference: 102711 (3424)
Full Extent:
XMin: 190980.000000004
YMin: 34770
XMax: 658180.000000004
YMax: 852570.000000008
Spatial Reference: 102711 (3424)
Units: esriFeet
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