Robert F. Holland, Geobotanical Phenomenology John Vollmar Carol W. Witham, California Native Plant Society 20140813 vector digital data http://bios.dfg.ca.gov/ http://www.vernalpools.org/ This mapping documents the changes in extent and condition of vernal pool habitat in the Great Valley between 2005 and 2012. "Vernal pool habitat" is defined as vernal pools and the surrounding upland (typically grassland) habitat matrix. The 2005 basemap was created by using double-blind mapping protocol and included 21.4 million acres in and surrounding the Sacramento and San Joaquin valleys (Witham et al 2013). The area included in the 2012 remapping effort focused on the 807,820 acres identified in the 2005 map and areas immediately surrounding the previously mapped polygons. Special attention was paid to areas where habitat was being created through mitigation banking. The result of the 2012 remapping shows 764,868 acres of extant habitat. This is down from 2005, a net reduction of 42,952 acres. Habitat actually was eliminated from 47,306 acres, but these losses were partially off-set by 1,679 acres of mitigation banks built since 2005, and by 2,675 acres that we missed in the 2005 mapping. In the seven years since the Recovery Plan was adopted, some 6,758 acres per year on average have been lost. (Link to Report and GIS Data) - http://www.vernalpools.org/ Map showing the distribution of vernal pool habitat in the Great Valley (California) as of 2012. It also analyzes losses since 2005 and contains information on vernal pool habitat that is protected. The 2005 polygons were sketched onto 2005 NAIP imagery by two independent mappers: Carol W. Witham and Robert F. Holland. Maps were reconciled by the mappers on a polygon-by-polygon basis with the best boundaries and attributes for each discussed and chosen before moving onto the next polygon. For the remapping effort based on the 2012 imagery, Holland and Witham divided up the counties and proceeded to map changes. Each polygon was revisited in the 2012 imagery. If changes in land use had occurred, they were immediately visible in the photo. Where needed, the 2005 polygons were cut into smaller polygons to reflect 2012 conditions and the new geodatabase fields were populated. In some cases, additional habitat was identified-either newly created mitigation banks or habitat missed during the 2005 mapping. New polygons were created to reflect these additional areas of habitat. 20120101 ground condition Complete As needed -122.560934 -118.889500 40.691536 35.375931 None vernal pools hogwallows ISO 19115 Topic Category biota environment None Great Valley Sacramento Valley San Joaquin Valley California None 2012 None Credit authors California Native Plant Society Carol W. Witham Co-author mailing and physical

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Sacramento CA 95816-5415 US 916-452-5440 carolwwitham@gmail.com Carol W. Witham, Robert F. Holland and John Vollmar. 2014. Changes in the Distribution of Great Valley Vernal Pool Habitats from 2005 to 2012. Sacramento, CA. Report prepared for the U.S. Fish and Wildlife Service and Bureau of Reclamation CVPIA Habitat Restoration Program under Grant Agreement No. F11AP00169 with the USFWS. Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.5.1.7333 Robert F. Holland Carol W. Witham John Vollmar Sacramento, CA Minimum Mapping Unit No minimum mapping unit was established prior to mapping. The map therefore suffers from shortfalls related to economy of scale. In small polygons, the mappers were more likely to subtract small cutouts for buildings, corrals or staging areas. In larger polygons, the same size cutout was often overlooked simply because it was small in proportion to the landscape being mapped. N/A Vector GT-polygon composed of chains 2456 NAD 1983 California Teale Albers 34.0 40.5 -120.0 0.0 0.0 -4000000.0 coordinate pair 0.0001 0.0001 meter D North American 1983 GRS 1980 6378137.0 298.257222101 Vernal Pool Distribution - California's Great Valley - 2012 [ds1070] Polygons representing vernal pool landscapes and individual vernal pools Witham/Holland OBJECTID Internal feature number. Esri Sequential unique whole numbers that are automatically generated. Shape Feature geometry. Esri Coordinates defining the features. FEATURE Vernal pool matrix or individual pool. Witham/Holland 0 Vernal pool matrix 1 Individual vernal pool COVER_VPs Cover of vernal pools by cover class. Witham/Holland 0 <2% cover of vernal pools 1 2-5% cover of vernal pools 2 5-10% cover of vernal pools 3 >10% cover of vernal pools 4 100% (individual pool / stockpond) DENSITY_VPs Qualitative density assessment. Witham/Holland 0 Low 1 Medium 2 High DIVERSITY_VPs Qualitative diversity assessment. Witham/Holland 0 Low 1 Medium 2 High NUMBER_LargePools Number of large pools per polygon. Witham/Holland 0 None in polygon 1 <1 per 640 acres 2 1-3 per 640 acres 3 4+ per 640 acres DISTURBANCE_Area Cover of disturbance by cover class. Witham/Holland 0 <1% of polygon 1 1-5% polygon 2 5-25% of polygon 3 25-50% of polygon 4 50-99% of polygon 5 100% of polygon DISTURBANCE_Type Dominant type of disturbance. Witham/Holland 0 None / unknown 1 Plowing, disking or grading 2 OHV use 3 Ranch roads 4 Paved roads 5 Ag runoff (altered hydrology) 6 Agricultural residential 7 Managed wetlands (duck ponds) 8 Mitigation banks (created vernal pools) DISTURBANCE_Intensity Qualitative assessment of intensity of disturbance. Witham/Holland HABITAT_Notes Notes on habitat observations. Witham/Holland MAPPING_Notes Notes used during heads up digitizing. Witham/Holland COUNTY County in which habitat polygon occurs. Witham/Holland Acres Acres calculated from Shape_area. Witham/Holland Calculated as Shape_area/4046.825 m2/acre Converted_2012 Converted_To_2012 Converted_Notes_2012 Disturbance_Area_2012 Disturbance_Type_2012 Disturbance_Intensity_2012 Land_Use_Area Surrounding_Land_Use_1 Surrounding_Land_Use_2 Surrounding_Land_Use_3 New_Notes Shape_Length Length of feature in internal units. Esri Positive real numbers that are automatically generated. Shape_Area Area of feature in internal units squared. Esri Positive real numbers that are automatically generated. 20171113 California Native Plant Society Carol W. Witham Co-author mailing and physical

1141 37th Street

Sacramento CA 95816-5415 US 916-452-5440 cwitham@ncal.net FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time