Powderhouse Gulch - USPOW001 Additional Site Information Lauren Shapiro, Emily K. Heyerdahl, Penny Morgan. Dating Method: Crossdated Sample Storage Location: USDA Forest Service, Rocky Mountain Research Station Fire Sciences Lab P.O. Box 8089 (or 5775 West Highway 10) Missoula, MT 59807 stored by Emily Heyerdahl (eheyerdahl@fs.fed.us, 406-829-6939) Reference: Shapiro-Miller, L.B., E.K. Heyerdahl, and P. Morgan. 2007. Comparison of fire scars, fire atlases, and satellite data in the northwestern United States. Canadian Journal of Forest Research. 37:1933-1943. Abstract: We evaluated agreement in the location and occurrence of 20th-century fires recorded in digital fire atlases and inferred from the delta normalized burn ratio derived from pre- and post-fire satellite imagery with those inferred from fire scars we collected systematically. The full data set posted here (Powderhouse Gulch) contains a reconstructed multi-century history (1700-2005) of the occurrence of surface fires from 218 fire scars on 79 trees sampled near the Powderhouse Gulch, on 611 hectares on the west side of the Middle Fork of the Payette River, Boise National Forest, Idaho. Although the reconstruction is multi-century, this collection is biased towards 20th century fire scars to facilitate greater project goals. At this site, within 50 m of each plot center (corresponding to a plot size of 0.8 ha), we used a chain saw to remove a partial cross section from up to five trees with the best-preserved recent (i.e., 20th century) fire scars (average 3 trees). Most sampled trees were live (76) with the rest stumps, snags, and logs. From the majority of the live trees with only a single visible fire scar (44 f sampled trees), we removed an increment core that intersected that scar. Nearly all sampled trees were ponderosa pine (96) with the rest Douglas-fir. We recorded the location of each sampled tree with a global positioning system. Fire perimeters were similar for two of three 20th-century fires (1924 and 1986). Overall spatial agreement was best in 1924 (producer's accuracy = 94% and 68% user's accuracy = 90% and 70% for the 1924 and 1986 fires, respectively). In 1924, fire extent from the atlas was greater than for fire scars, but the reverse was true for 1986. For 1986, fire extent interpreted from the delta normalized burn ratio derived from pre- and post-fire satellite imagery was similar to that inferred from the fire-scar record (producer's accuracy = 92% user's accuracy = 88%). Individual Tree Information: Plot,Sample,number of scars dated,number of injuries dated,species,type of sample,UTM-E (NAD27, zone 11),UTM-N (NAD27, zone 11),condition,comments,Perimeter Plot for 1924?,Perimeter Plot for 1986? 70F,71,0,0,Pinus ponderosa,section,583692,4898174,stump,,yes,no 70F,72,0,0,Pinus ponderosa,section,583707,4898166,log,,yes,no 70F,70A,0,0,Pinus ponderosa,section,583696,4898147,stump,,yes,no 70F,70B,0,0,Pinus ponderosa,section,583696,4898147,stump,,yes,no 70H,70,3,0,Pinus ponderosa,section,584204,4898146,live,,yes,no 70H,71,4,0,Pinus ponderosa,section,584213,4898131,live,,yes,no 71I,70,3,0,Pinus ponderosa,section,584442,4897933,live,,no,no 71I,71,2,0,Pinus ponderosa,section,584442,4897940,live,,no,no 72D,70,3,1,Pinus ponderosa,section,583222,4897609,log,,yes,no 72D,72,4,0,Pinus ponderosa,section,583181,4897588,live,,yes,no 72D,71A,5,0,Pinus ponderosa,section,583222,4897604,log,,yes,no 72D,71B,0,0,Pinus ponderosa,section,583222,4897604,log,,yes,no 72D,72X,5,2,Pinus ponderosa,section,583077,4897499,live,,yes,no 72F,70,3,1,Pinus ponderosa,section,583755,4897641,live,,no,yes 72F,71X,5,0,Pinus ponderosa,section,583784,4897647,snag,,no,yes 72F,72X,3,0,Pinus ponderosa,section,583784,4897647,snag,,no,yes 72H,71,2,0,Pinus ponderosa,section,584180,4897595,live,,no,yes 72H,73,0,0,Pinus ponderosa,section,584177,4897562,log,,no,yes 72H,75,0,0,Pinus ponderosa,section,584202,4897571,log,,no,yes 72H,76,3,0,Pinus ponderosa,section,584169,4897601,stump,,no,yes 73G,70X,3,0,Pinus ponderosa,section,583892,4897503,live,,no,yes 73I,70,4,0,Pinus ponderosa,section,584399,4897358,live,,no,yes 73I,71,4,0,Pinus ponderosa,section,584449,4897456,log,,no,yes 74H,70,2,0,Pinus ponderosa,section,584238,4897070,live,,no,yes 75G,70,3,0,Pinus ponderosa,section,583841,4896906,live,,no,yes 75G,71,2,0,Pinus ponderosa,section,583910,4896870,live,,no,yes 75G,72,2,0,Pinus ponderosa,section,583947,4896873,live,,no,yes 76D,10,1,0,Pseudotsuga menziesii,increment core,583195,4896590,live,,yes,yes 76F,70,1,0,Pinus ponderosa,increment core,583715,4896582,live,,no,yes 76F,71,1,0,Pinus ponderosa,increment core,583704,4896605,live,,no,yes 76F,72,1,0,Pinus ponderosa,increment core,583723,4896587,live,,no,yes 76H,70,0,0,Pinus ponderosa,increment core,584240,4896626,live,,no,no 76H,71,1,0,Pinus ponderosa,section,584255,4896622,live,,no,no 77E,70,2,0,Pinus ponderosa,section,583406,4896357,stump,,yes,yes 77E,71,1,0,Pinus ponderosa,section,583466,4896391,live,,yes,yes 77E,73,1,0,Pinus ponderosa,section,583451,4896348,log,,yes,yes 77E,19A,1,0,Pseudotsuga menziesii,increment core,583452,4896333,live,,yes,yes 77G,73,0,0,Pinus ponderosa,increment core,583963,4896354,live,,no,no 77I,70,1,0,Pinus ponderosa,section,584514,4896326,live,,no,no 78D,70,4,0,Pinus ponderosa,section,583154,4896088,log,,no,yes 78F,70,1,0,Pinus ponderosa,increment core,583732,4896077,live,,no,no 78F,71,1,0,Pinus ponderosa,increment core,583720,4896147,live,,no,no 78F,72,2,1,Pinus ponderosa,section,583719,4896107,stump,,no,no 78F,73,0,0,Pinus ponderosa,section,583673,4896127,log,,no,no 78H,70,0,0,Pinus ponderosa,section,584179,4896134,log,,no,no 78H,71,2,0,Pinus ponderosa,section,584157,4896141,live,,no,no 78H,72,0,0,Pseudotsuga menziesii,section,584204,4896102,log,,no,no 78H,73,0,0,Pinus ponderosa,section,584204,4896102,live,,no,no 78H,74,2,0,Pinus ponderosa,section,584204,4896102,live,,no,no 78J,70,0,0,Pinus ponderosa,section,584720,4896105,live,,no,no 78J,71,5,0,Pinus ponderosa,section,584682,4896073,live,,no,no 78J,72,2,0,Pinus ponderosa,section,584660,4896088,live,,no,no 78J,73,3,0,Pinus ponderosa,section,584661,4896112,stump,,no,no 78J,X1,8,0,Pinus ponderosa,section,584679,4895961,live,,no,no 78J,X2,8,0,Pinus ponderosa,section,584679,4895960,live,,no,no 78L,70,2,0,Pinus ponderosa,section,585214,4896127,live,,no,no 78L,71,4,0,Pinus ponderosa,section,585258,4896113,live,,no,no 78L,72,5,0,Pinus ponderosa,section,585248,4896110,live,,no,no 78N,71X,10,0,Pinus ponderosa,section,585586,4895950,live,,no,no 79E,70,4,0,Pinus ponderosa,section,583499,4895868,live,,yes,yes 79E,71,2,0,Pinus ponderosa,section,583460,4895851,live,,yes,yes 79E,72A,2,0,Pinus ponderosa,section,583528,4895837,log,,yes,yes 79E,72B,2,0,Pinus ponderosa,section,583528,4895837,log,,yes,yes 79K,71,5,0,Pinus ponderosa,section,584952,4895833,live,,no,no 79K,72,5,0,Pinus ponderosa,section,584893,4895838,live,,no,no 80D,70,1,0,Pinus ponderosa,increment core,583227,4895640,live,,yes,yes 80F,70,1,0,Pinus ponderosa,increment core,583693,4895625,live,,no,yes 80F,71,1,0,Pinus ponderosa,increment core,583678,4895633,live,,no,yes 80F,72,1,0,Pinus ponderosa,increment core,583677,4895645,live,,no,yes 80H,70,1,0,Pinus ponderosa,increment core,584169,4895620,live,,no,no 80NX,70A,12,2,Pinus ponderosa,section,585615,4895758,snag,,no,no 80NX,70B,13,1,Pinus ponderosa,section,585615,4895758,snag,,no,no 81E,70,4,1,Pinus ponderosa,section,583440,4895360,stump,,no,yes 81E,71,6,0,Pinus ponderosa,section,583441,4895363,stump,,no,yes 81G,70,1,0,Pinus ponderosa,increment core,583833,4895290,live,,yes,yes 81I,70,1,0,Pinus ponderosa,section,584436,4895396,live,,yes,yes 81I,71,1,0,Pinus ponderosa,section,584466,4895367,live,,yes,yes 82D,71,0,0,Pinus ponderosa,section,583188,4895093,log,,yes,no 82D,72,1,0,Pinus ponderosa,increment core,583148,4895148,live,,yes,no 82D,73,1,0,Pinus ponderosa,increment core,583151,4895150,live,,yes,no 82D,74,1,0,Pinus ponderosa,increment core,583151,4895151,live,,yes,no 82H,70,1,0,Pinus ponderosa,increment core,583942,4895091,live,,no,no 82H,71,1,0,Pinus ponderosa,increment core,583944,4895088,live,,no,no 83E,70,1,0,Pinus ponderosa,section,583436,4894872,live,,yes,no 83E,71,1,0,Pinus ponderosa,section,583486,4894827,live,,yes,no 83E,72,1,0,Pinus ponderosa,section,no satellites,no satellites,live,,yes,no 83G,70,1,0,Pinus ponderosa,increment core,583915,4894828,live,,yes,no 84F,70,1,0,Pinus ponderosa,increment core,583676,4894577,live,,yes,no 84F,71,1,0,Pinus ponderosa,increment core,583665,4894583,log,,yes,no 84F,72,0,0,Pseudotsuga menziesii,section,583654,4894587,snag,,yes,no 84F,73,0,0,Pinus ponderosa,increment core,583676,4894578,live,,yes,no 84H,70,1,0,Pinus ponderosa,increment core,584183,4894601,live,,yes,no 84H,71,1,0,Pinus ponderosa,increment core,584184,4894607,live,,yes,no 85G,70,0,0,Pinus ponderosa,increment core,583902,4894343,live,,yes,no 85G,71,0,0,Pinus ponderosa,increment core,583901,4894341,live,,yes,no 85G,72,1,0,Pseudotsuga menziesii,section,583654,4894587,snag,,yes,no 86FX,70,6,1,Pinus ponderosa,section,583751,4894288,stump,not sure of injury date,yes,no 86FX,71,3,0,Pinus ponderosa,section,583724,4894228,stump,,yes,no 86FX,72,0,0,Pinus ponderosa,section,583726,4894145,log,,yes,no 86H,71,1,0,Pinus ponderosa,increment core,584084,4894063,live,,yes,no Fire History Graphs: Fire History Graphs illustrate specific years when fires occurred and how many trees were scarred. They are available in both PDF and PNG formats. The graphs consist of 2 parts, both of which show the X axis (time line) at the bottom with the earliest year of information on the left and the latest on the right. The Fire Index Plot is the topmost plot, and shows two variables: sample depth (the number of recording trees in each year) as a blue line along the left Y axis, compared with the percent trees scarred shown as gray bars along the right Y axis. Below, the Fire Chronology Plot consists of horizontal lines representing injuries by year on individual sampled trees. Symbols are overlain that denote the years containing the dendrochronologically-dated fire scars or injuries. The sample ID of each tree is displayed to the right of each line. The Composite Axis below represents the composite information from all individual series. The symbols used to represent the fire scars or injuries, and the filters used to determine the composite information, are shown in the legend. These graphs were created using the Fire History Analysis and Exploration System (FHAES). See http://frames.nbii.gov/fhaes/ for more information.