Why I Hate PowerPoint Also, the Impact of Class Definition on Landscape Metrics Used in FRAGSTATS.

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Presentation transcript:

Why I Hate PowerPoint Also, the Impact of Class Definition on Landscape Metrics Used in FRAGSTATS

The Details ► Consolidate Classes from Lab 1 ► Apply the same metrics to data from the same year (2001). ► Observe results ► Interpret results

Original Classes ► Following Slides Contain a List of the Original Classes. ► More than 30 classes.

ClassDescription 111Developed: Highly (>75% impervious surface) 112Developed: Moderately (50-75% impervious surface) 113Developed: Lightly - wooded (25-50% impervious surface) 114Developed: Lightly - unwooded (25-50% impervious surface) 120Cultivated (actively tilled, fallow and recently abandoned) 131Grassland: unmanaged (grazed land, old fields, abandoned land) 132Grassland: managed (golf courses, residential/corporate lawn, parks) 133Grassland: airport

141 Upland Forest: Coastal Plain Oak dominant (Oak > 75%) 142 Upland Forest: Coastal Plain Oak-pine (Oak %) 143 Upland Forest: Coastal Plain Pine-oak (Pine %) 144 Upland Forest: Coastal Plain Pine dominant (Pine > 75%) 145 Upland Forest: Highlands/Piedmont deciduous - mixed hardwoods dominant 146 Upland Forest: Highlands/Piedmont mixed deciduous/coniferous - hemlock/pine 147 Upland Forest: Highlands/Piedmont mixed deciduous/coniferous - red cedar/pine 148 Upland Forest: Highlands/Piedmont coniferous - hemlock/pine dominant 149 Upland Forest: Highlands/Piedmont coniferous - red cedar/pine/plantation dominant

151 Upland Scrub/Shrub: Coastal Plain mixed deciduous/coniferous 152 Upland Scrub/Shrub: Coastal Plain mixed deciduous/coniferous - maritime/dune 153 Upland Scrub/Shrub: Highlands/Piedmont mixed deciduous/coniferous 160 Barren soil/rock (sand/gravel pits, barren < 25% vegetation) 200Marine/Estuarine Unconsolidated shore 210Estuarine emergent marsh 230 Riverine/lacustrine/palustrine emergent marsh: mixed species 241 Wetland Forest: Coastal Plain hardwood swamp (>66% deciduous) 242 Wetland Forest: Coastal Plain pine lowland (>66% evergreen)

243 Wetland Forest: Coastal Plain mixed - hardwood/white cedar-pine- holly 244 Wetland Forest: Coastal Plain white cedar swamp (>66% evergreen) 245Wetland Scrub/shrub: Coastal Plain mixed 246 Wetland Forest: Highlands/Piedmont hardwood swamp (>66% deciduous) 247 Wetland Forest: Highlands/Piedmont mixed - hardwood/hemlock/white cedar/pine 248 Wetland Forest: Highlands/Piedmont conifer swamp - hemlock/cedar/pine dominant (>66% evergreen) 249 Wetland Scrub/shrub: Highlands/Piedmont mixed deciduous/evergreen 250Water

Consolidation ► ArcView condition (“con”) command. ► All Urban Classes  1 Developed Class. ► All Upland Forest Classes  1 Class. ► Wetland Forest Classes  1 Class. ► Some Classes not combined (pasture, fresh/salt water marsh, water, bare soil).

30+ Classes Down to 12 Classes ClassLand Use 1Developed 2Cultivated 3Grassland 4Upland Forest 5Upland Shrub 6Barren Soil/Bare Rock 7Marine/Estuarine Unconsolidated shore 8Estuarine emergent marsh 9Riverine/lacustrine/palustrine emergent marsh: mixed species 10Wetland Forest 11Wetland Shrub 12Water

VS What Are the Impacts?

Original (Landscape) Metric YearNPLPITESIDI

Modified (Landscape) Metric YearNPLPITESIDI

PD Conclusions ► Combined  only shows slight increased in PD ► Original  Class 112 increases the most while Class 113 is has the highest total PD. ► Loss of detail, information.

PLAND Conclusions ► Combining classes increases PLAND vs classes that were not combined. ► Graph two only shows increased trend in the developed class. ► Detail is lost.

COHESION Conclusions ► Graph two only shows a slight increase in cohesion for Class 1. ► In Graph one: 111 decreases, 112 increases, 113 decreases, and 114 decreases in 1984 then increases by ► Detail.

Conclusions ► Impact on Landscape metrics was straight- forward. ► Loss of detail in class-level metrics. ► Change relationships between patches and classes.

The End ► Annoying Sound Effects! ► Graphs! ► Amazing Special Effects! ► This is even better than a Duck Tales Episode!