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Applying site-suitability to Memorial Groves and understanding the risks B Y: C A S S I D Y I N C E


ArcMap: What it is and How it Works • “ArcMap is the map display and editing workhorse for the ESRI ArcGIS Geographical Information System (GIS) software package. It is most widely used for map creation, but also has broad capabilities for editing and spatial analysis. The "Toolbox" available in ArcMap provides an encyclopedic array of GIS data manipulation and analysis functions for almost any application.”

Source: https://www.dataone.org/software-tools/esri-arcmap


Weighted Overlay Analysis • Used to determine site-suitability • Solves multicriteria problems • Allows user to manipulate weights and rating system • Displays results by taking every attribute into consideration

Source: http://desktop.arcgis.com/en/arcmap/10.3/tools/spatial-analysttoolbox/how-weighted-overlay-works.htm


STEP 1: Determine Criteria

Source: CenterPoint Energy and USDA/NRCS


STEP 2: Gather Shapefiles


STEP 3: Convert Vectors to Rasters • Rasters are determined by individual units (pixels) • Polygons can contain multiple attributes • WOA cannot run with vectors • Essentially more precise • Allows user to define criteria

Source: http://webhelp.esri.com/arcgisdesktop/9.2/index.cfm?TopicName=What_is_raster_data%3F


STEP 4: Reclassify Rasters • Allows user to define individual pixels with values • Attributes can be grouped together • Enables user to input the rating system

Source: http://pro.arcgis.com/en/pro-app/tool-reference/spatial -analyst/understanding-reclassification.htm


STEP 5: Develop a Rating System


STEP 6: Enter Data into WOA Tool


STEP 7: Apply Compiled Data


How can site-suitability be applied to Memorial Groves?


Plans for Memorial Groves • Memorial Site for Camp Logan veterans • 65 Acre Pine Regiment • Monoculture stand of loblolly pine/shortleaf pine

Source: Memorial Park Master Plan


Loblolly Pine vs. Shortleaf Pine


What risks are associated with planting a monoculture stand of loblolly pine trees?


Loss of Biodiversity • Habitat loss – Removal of the midstory/understory

• Decrease in genetic variation – Bottleneck Effect – Pest/Disease Outbreaks – Reduced Storm Resistance


Bottleneck Effect • Less genetic variation – Smaller gene pool

• Reduces adaptivity to conditions • More desirable to pests/disease

Source: http://nectunt.bifi.es/to-learnmore-overview/mechanisms-ofevolutionary-change/


Southern Pine Beetle (Dendroctonus frontalis) • Females target stressed/damaged trees • Create S-shaped egg galleries • Tree mortality • Monoculture is desirable

Source: http://entnemdept .ufl.edu/creatures/ trees/southern_pi ne_beetle.htm


Fusiform Rust • Caused by the fungus Cronartium fusiforme • Prominent in the winter • Forms cankers on branches and stems • Weakens tree structure • Discoloration in bark

Source: https://www.uaex.edu/environmentnature/forestry/health/disease-problems.aspx


Reduced Storm Resistance • Lower wind resistance compared to other pines (Kurt et al 2009). • Hurricane Katrina/Hurricane Rita/Hurricane Ike damage • 2011 Drought – 80% tree mortality (USDA)

Sources: Kurt et al 2009, USDA, PBS.org and LSU


Altering Soil Use • Affects soil fertility • Harris County Soil Survey • Native Pasture Soils – Ge – Md

• Altered Soil – An

• Timber Soils – Bn

Source: https://www.nrcs.usda.gov/Internet/FSE_MANU SCRIPTS/texas/harrisTX1976/harris.pdf


How can Memorial Park reduce the risks associated with planting a monoculture stand?


Forest Management Recommendations • Reduce the area of the Memorial • Use site-suitability maps • Plant on correct soils • Maintain stand structure • Thin out hazardous or lower quality trees

Source: http://magnolialandandtimber.blogspot .com/p/thinning-plantation.html (Image)


THANK YOU MPC STAFF!!!


Citations • https://www.na.fs.fed.us/spfo/pubs/fidls/fusiform/fidl-fusi.htm • http://rnr-cmap.lsu.edu/rid=1P6YCTB2X-1JGRNLFNLR/1P6XT2Y4RI3SC1KXI7C4Iimage • http://www.pbs.org/newshour/multimedia/drought-fromabove/4.html • https://www.nrcs.usda.gov/Internet/FSE_MANUSCRIPTS/texas/ harrisTX1976/harris.pdf • https://www.dataone.org/software-tools/esri-arcmap • http://desktop.arcgis.com/en/arcmap/10.3/tools/spatial-analysttoolbox/how-weighted-overlay-works.htm • http://webhelp.esri.com/arcgisdesktop/9.2/index.cfm?TopicName =What_is_raster_data%3F


Citations Continued • http://pro.arcgis.com/en/pro-app/tool-reference/spatialanalyst/understanding-reclassification.htm • Memorial Park Master Plan • http://nectunt.bifi.es/to-learn-more-overview/mechanisms-ofevolutionary-change/ • http://entnemdept.ufl.edu/creatures/trees/southern_pine_beetle. htm • http://magnolialandandtimber.blogspot.com/p/thinningplantation.html

Applying Site Suitability to Memorial Groves  

Prepared by Cassidy Ince, 2017 Intern

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