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Layer: Sargent Cypress Structural Classification (ID:16)

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Name: Sargent Cypress Structural Classification

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Description: <div style="text-align:Left;"><p>This metric uses mean lidar-derived stand height to classify the 138 Sargent Cypress stands in Marin County into two classes. Soil type is then used to divide these into four total classes, described below (Figures 6.18, 6.19). Unlike for Bishop Pine, fire history for Sargent Cypress was not an obvious predictor of stand height or density; rather, soil substrate was a better correlate for stand structure.<br /></p><p>There are two fairly distinct populations of Sargent cypress in Marin County – the stands on San Geronimo Ridge which occur on serpentinite, and a small, more disparate population on Mt Tam (generally taller) on a mix of different soils, though none serpentinite according to the Marin County soil survey. <br /></p><p><u>Metric Classes:</u><br /></p><p><ul><li><span style="font-weight:bold;">Taller, non-Serpentinite</span><span>: mean stand height &gt;= 20 feet, stand does not intersect a soil polygon with a taxonomic class of Clayey-skeletal, serpentinitic, thermic Lithic Argixerolls</span></li><li><span style="font-weight:bold;">Shorter, non-Serpentinite</span><span>: mean stand height &lt; 20 feet, stand does not intersect a soil polygon with a taxonomic class of Clayey-skeletal, serpentinitic, thermic Lithic Argixerolls</span></li><li><span style="font-weight:bold;">Taller, Serpentinite</span><span>: mean stand height &gt;= 20 feet, stand intersects (or is very close to) a soil polygon with a taxonomic class of Clayey-skeletal, serpentinitic, thermic Lithic Argixerolls</span></li><li><span style="font-weight:bold;">Shorter, Serpentinite</span><span>: mean stand height &lt; 20 feet, stand intersects (or is very close to) a soil polygon with a taxonomic class of Clayey-skeletal, serpentinitic, thermic Lithic Argixerolls</span></li></ul></p><p><span></span></p><p><span>There was one stand that was changed from tall to short due to an anomolous return in the lidar height data.</span></p><p><span style="font-family:&quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, sans-serif; font-size:16px;">See Chapter 6 of the </span><a href="https://www.onetam.org/sites/default/files/pdfs/marin_regional_forest_health_strategy_2023.pdf" style="color:rgb(0, 97, 155); text-decoration-line:none; font-family:&quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, sans-serif; font-size:16px;">Marin Regional Forest Health Strategy</a><span style="font-family:&quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, sans-serif; font-size:16px;"> (Page 261 - Sargent Cypress Structural Classification) for more information.</span><span><br /></span></p><p><span> </span></p></div>

Copyright Text: GGNPC, OneTam, Tukman Geospatial

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Type ID Field: SARG_STRUCT_CLASSIFICATION

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Last Edit Date: 12/12/2023 8:00:29 PM

Schema Last Edit Date: 11/28/2023 10:20:41 PM

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